[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini mount implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
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| 6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 7 | * Copyright (C) 2005-2006 by Rob Landley <rob@landley.net>
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| 8 | *
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| 9 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 10 | */
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| 11 |
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| 12 | /* Design notes: There is no spec for mount. Remind me to write one.
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| 13 |
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| 14 | mount_main() calls singlemount() which calls mount_it_now().
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| 15 |
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| 16 | mount_main() can loop through /etc/fstab for mount -a
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| 17 | singlemount() can loop through /etc/filesystems for fstype detection.
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| 18 | mount_it_now() does the actual mount.
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| 19 | */
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| 20 |
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[1770] | 21 | #include "libbb.h"
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[821] | 22 | #include <mntent.h>
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| 23 |
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[1770] | 24 | /* Needed for nfs support only... */
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| 25 | #include <syslog.h>
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| 26 | #include <sys/utsname.h>
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| 27 | #undef TRUE
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| 28 | #undef FALSE
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| 29 | #include <rpc/rpc.h>
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| 30 | #include <rpc/pmap_prot.h>
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| 31 | #include <rpc/pmap_clnt.h>
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| 32 |
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| 33 |
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| 34 | #if defined(__dietlibc__)
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| 35 | /* 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
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| 36 | * dietlibc-0.30 does not have implementation of getmntent_r() */
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| 37 | /* OTOH: why we use getmntent_r instead of getmntent? TODO... */
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| 38 | struct mntent *getmntent_r(FILE* stream, struct mntent* result, char* buffer, int bufsize)
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| 39 | {
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| 40 | /* *** XXX FIXME WARNING: This hack is NOT thread safe. --Sampo */
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| 41 | struct mntent* ment = getmntent(stream);
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| 42 | memcpy(result, ment, sizeof(struct mntent));
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| 43 | return result;
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| 44 | }
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[821] | 45 | #endif
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| 46 |
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[1770] | 47 |
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[821] | 48 | // Not real flags, but we want to be able to check for this.
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[1770] | 49 | enum {
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| 50 | MOUNT_USERS = (1<<28)*ENABLE_DESKTOP,
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| 51 | MOUNT_NOAUTO = (1<<29),
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| 52 | MOUNT_SWAP = (1<<30),
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| 53 | };
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| 54 | // TODO: more "user" flag compatibility.
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| 55 | // "user" option (from mount manpage):
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| 56 | // Only the user that mounted a filesystem can unmount it again.
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| 57 | // If any user should be able to unmount, then use users instead of user
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| 58 | // in the fstab line. The owner option is similar to the user option,
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| 59 | // with the restriction that the user must be the owner of the special file.
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| 60 | // This may be useful e.g. for /dev/fd if a login script makes
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| 61 | // the console user owner of this device.
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| 62 |
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[821] | 63 | /* Standard mount options (from -o options or --options), with corresponding
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| 64 | * flags */
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| 65 |
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| 66 | struct {
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| 67 | const char *name;
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| 68 | long flags;
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[1770] | 69 | } static mount_options[] = {
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| 70 | // MS_FLAGS set a bit. ~MS_FLAGS disable that bit. 0 flags are NOPs.
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[821] | 71 |
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[1770] | 72 | USE_FEATURE_MOUNT_LOOP(
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| 73 | {"loop", 0},
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| 74 | )
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[821] | 75 |
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[1770] | 76 | USE_FEATURE_MOUNT_FSTAB(
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| 77 | {"defaults", 0},
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| 78 | /* {"quiet", 0}, - do not filter out, vfat wants to see it */
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| 79 | {"noauto", MOUNT_NOAUTO},
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| 80 | {"sw", MOUNT_SWAP},
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| 81 | {"swap", MOUNT_SWAP},
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| 82 | USE_DESKTOP({"user", MOUNT_USERS},)
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| 83 | USE_DESKTOP({"users", MOUNT_USERS},)
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| 84 | )
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[821] | 85 |
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[1770] | 86 | USE_FEATURE_MOUNT_FLAGS(
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| 87 | // vfs flags
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| 88 | {"nosuid", MS_NOSUID},
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| 89 | {"suid", ~MS_NOSUID},
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| 90 | {"dev", ~MS_NODEV},
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| 91 | {"nodev", MS_NODEV},
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| 92 | {"exec", ~MS_NOEXEC},
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| 93 | {"noexec", MS_NOEXEC},
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| 94 | {"sync", MS_SYNCHRONOUS},
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| 95 | {"async", ~MS_SYNCHRONOUS},
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| 96 | {"atime", ~MS_NOATIME},
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| 97 | {"noatime", MS_NOATIME},
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| 98 | {"diratime", ~MS_NODIRATIME},
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| 99 | {"nodiratime", MS_NODIRATIME},
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| 100 | {"loud", ~MS_SILENT},
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[821] | 101 |
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[1770] | 102 | // action flags
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[821] | 103 |
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[1770] | 104 | {"bind", MS_BIND},
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| 105 | {"move", MS_MOVE},
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| 106 | {"shared", MS_SHARED},
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| 107 | {"slave", MS_SLAVE},
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| 108 | {"private", MS_PRIVATE},
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| 109 | {"unbindable", MS_UNBINDABLE},
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| 110 | {"rshared", MS_SHARED|MS_RECURSIVE},
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| 111 | {"rslave", MS_SLAVE|MS_RECURSIVE},
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| 112 | {"rprivate", MS_SLAVE|MS_RECURSIVE},
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| 113 | {"runbindable", MS_UNBINDABLE|MS_RECURSIVE},
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| 114 | )
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| 115 |
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| 116 | // Always understood.
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| 117 |
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| 118 | {"ro", MS_RDONLY}, // vfs flag
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| 119 | {"rw", ~MS_RDONLY}, // vfs flag
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| 120 | {"remount", MS_REMOUNT}, // action flag
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[821] | 121 | };
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| 122 |
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[1770] | 123 |
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[821] | 124 | /* Append mount options to string */
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[1770] | 125 | static void append_mount_options(char **oldopts, const char *newopts)
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[821] | 126 | {
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[1770] | 127 | if (*oldopts && **oldopts) {
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| 128 | /* do not insert options which are already there */
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| 129 | while (newopts[0]) {
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| 130 | char *p;
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| 131 | int len = strlen(newopts);
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| 132 | p = strchr(newopts, ',');
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| 133 | if (p) len = p - newopts;
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| 134 | p = *oldopts;
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| 135 | while (1) {
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| 136 | if (!strncmp(p, newopts, len)
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| 137 | && (p[len]==',' || p[len]==0))
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| 138 | goto skip;
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| 139 | p = strchr(p,',');
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| 140 | if (!p) break;
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| 141 | p++;
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| 142 | }
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| 143 | p = xasprintf("%s,%.*s", *oldopts, len, newopts);
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| 144 | free(*oldopts);
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| 145 | *oldopts = p;
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| 146 | skip:
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| 147 | newopts += len;
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| 148 | while (newopts[0] == ',') newopts++;
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| 149 | }
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[821] | 150 | } else {
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| 151 | if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
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[1770] | 152 | *oldopts = xstrdup(newopts);
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[821] | 153 | }
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| 154 | }
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| 155 |
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| 156 | /* Use the mount_options list to parse options into flags.
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[1770] | 157 | * Also return list of unrecognized options if unrecognized!=NULL */
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[821] | 158 | static int parse_mount_options(char *options, char **unrecognized)
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| 159 | {
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| 160 | int flags = MS_SILENT;
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| 161 |
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| 162 | // Loop through options
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| 163 | for (;;) {
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| 164 | int i;
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| 165 | char *comma = strchr(options, ',');
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| 166 |
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| 167 | if (comma) *comma = 0;
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| 168 |
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| 169 | // Find this option in mount_options
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[1770] | 170 | for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
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[821] | 171 | if (!strcasecmp(mount_options[i].name, options)) {
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| 172 | long fl = mount_options[i].flags;
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[1770] | 173 | if (fl < 0) flags &= fl;
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[821] | 174 | else flags |= fl;
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| 175 | break;
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| 176 | }
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| 177 | }
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| 178 | // If unrecognized not NULL, append unrecognized mount options */
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[1770] | 179 | if (unrecognized && i == ARRAY_SIZE(mount_options)) {
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[821] | 180 | // Add it to strflags, to pass on to kernel
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| 181 | i = *unrecognized ? strlen(*unrecognized) : 0;
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| 182 | *unrecognized = xrealloc(*unrecognized, i+strlen(options)+2);
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| 183 |
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| 184 | // Comma separated if it's not the first one
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| 185 | if (i) (*unrecognized)[i++] = ',';
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| 186 | strcpy((*unrecognized)+i, options);
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| 187 | }
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| 188 |
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| 189 | // Advance to next option, or finish
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[1770] | 190 | if (comma) {
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[821] | 191 | *comma = ',';
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| 192 | options = ++comma;
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| 193 | } else break;
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| 194 | }
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| 195 |
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| 196 | return flags;
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| 197 | }
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| 198 |
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| 199 | // Return a list of all block device backed filesystems
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| 200 |
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| 201 | static llist_t *get_block_backed_filesystems(void)
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| 202 | {
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[1770] | 203 | static const char filesystems[2][sizeof("/proc/filesystems")] = {
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| 204 | "/etc/filesystems",
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| 205 | "/proc/filesystems",
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| 206 | };
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| 207 | char *fs, *buf;
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[821] | 208 | llist_t *list = 0;
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| 209 | int i;
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| 210 | FILE *f;
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| 211 |
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[1770] | 212 | for (i = 0; i < 2; i++) {
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| 213 | f = fopen(filesystems[i], "r");
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| 214 | if (!f) continue;
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[821] | 215 |
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[1770] | 216 | while ((buf = xmalloc_getline(f)) != 0) {
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| 217 | if (!strncmp(buf, "nodev", 5) && isspace(buf[5]))
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| 218 | continue;
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| 219 | fs = skip_whitespace(buf);
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| 220 | if (*fs=='#' || *fs=='*' || !*fs) continue;
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[821] | 221 |
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[1770] | 222 | llist_add_to_end(&list, xstrdup(fs));
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| 223 | free(buf);
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[821] | 224 | }
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| 225 | if (ENABLE_FEATURE_CLEAN_UP) fclose(f);
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| 226 | }
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| 227 |
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| 228 | return list;
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| 229 | }
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| 230 |
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| 231 | llist_t *fslist = 0;
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| 232 |
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| 233 | #if ENABLE_FEATURE_CLEAN_UP
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| 234 | static void delete_block_backed_filesystems(void)
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| 235 | {
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| 236 | llist_free(fslist, free);
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| 237 | }
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| 238 | #else
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| 239 | void delete_block_backed_filesystems(void);
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| 240 | #endif
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| 241 |
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| 242 | #if ENABLE_FEATURE_MTAB_SUPPORT
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[1770] | 243 | static int useMtab = 1;
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[821] | 244 | static int fakeIt;
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| 245 | #else
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| 246 | #define useMtab 0
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| 247 | #define fakeIt 0
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| 248 | #endif
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| 249 |
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| 250 | // Perform actual mount of specific filesystem at specific location.
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[1770] | 251 | // NB: mp->xxx fields may be trashed on exit
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[821] | 252 | static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
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| 253 | {
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[1770] | 254 | int rc = 0;
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[821] | 255 |
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[1770] | 256 | if (fakeIt) goto mtab;
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[821] | 257 |
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| 258 | // Mount, with fallback to read-only if necessary.
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| 259 |
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[1770] | 260 | for (;;) {
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[821] | 261 | rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
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| 262 | vfsflags, filteropts);
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[1770] | 263 | if (!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
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[821] | 264 | break;
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| 265 | bb_error_msg("%s is write-protected, mounting read-only",
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| 266 | mp->mnt_fsname);
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| 267 | vfsflags |= MS_RDONLY;
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| 268 | }
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| 269 |
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| 270 | // Abort entirely if permission denied.
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| 271 |
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| 272 | if (rc && errno == EPERM)
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| 273 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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| 274 |
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| 275 | /* If the mount was successful, and we're maintaining an old-style
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| 276 | * mtab file by hand, add the new entry to it now. */
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[1770] | 277 | mtab:
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| 278 | if (ENABLE_FEATURE_MTAB_SUPPORT && useMtab && !rc && !(vfsflags & MS_REMOUNT)) {
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| 279 | char *fsname;
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[821] | 280 | FILE *mountTable = setmntent(bb_path_mtab_file, "a+");
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| 281 | int i;
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| 282 |
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[1770] | 283 | if (!mountTable) {
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| 284 | bb_error_msg("no %s",bb_path_mtab_file);
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| 285 | goto ret;
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| 286 | }
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[821] | 287 |
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| 288 | // Add vfs string flags
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| 289 |
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[1770] | 290 | for (i=0; mount_options[i].flags != MS_REMOUNT; i++)
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| 291 | if (mount_options[i].flags > 0 && (mount_options[i].flags & vfsflags))
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| 292 | append_mount_options(&(mp->mnt_opts), mount_options[i].name);
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[821] | 293 |
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| 294 | // Remove trailing / (if any) from directory we mounted on
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| 295 |
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[1770] | 296 | i = strlen(mp->mnt_dir) - 1;
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| 297 | if (i > 0 && mp->mnt_dir[i] == '/') mp->mnt_dir[i] = 0;
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[821] | 298 |
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[1770] | 299 | // Convert to canonical pathnames as needed
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| 300 |
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| 301 | mp->mnt_dir = bb_simplify_path(mp->mnt_dir);
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| 302 | fsname = 0;
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| 303 | if (!mp->mnt_type || !*mp->mnt_type) { /* bind mount */
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| 304 | mp->mnt_fsname = fsname = bb_simplify_path(mp->mnt_fsname);
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| 305 | mp->mnt_type = (char*)"bind";
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| 306 | }
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| 307 | mp->mnt_freq = mp->mnt_passno = 0;
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| 308 |
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[821] | 309 | // Write and close.
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| 310 |
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| 311 | addmntent(mountTable, mp);
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| 312 | endmntent(mountTable);
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[1770] | 313 | if (ENABLE_FEATURE_CLEAN_UP) {
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| 314 | free(mp->mnt_dir);
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| 315 | free(fsname);
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| 316 | }
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[821] | 317 | }
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[1770] | 318 | ret:
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[821] | 319 | return rc;
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| 320 | }
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| 321 |
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[1770] | 322 | #if ENABLE_FEATURE_MOUNT_NFS
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[821] | 323 |
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[1770] | 324 | /*
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| 325 | * Linux NFS mount
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| 326 | * Copyright (C) 1993 Rick Sladkey <jrs@world.std.com>
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| 327 | *
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| 328 | * Licensed under GPLv2, see file LICENSE in this tarball for details.
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| 329 | *
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| 330 | * Wed Feb 8 12:51:48 1995, biro@yggdrasil.com (Ross Biro): allow all port
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| 331 | * numbers to be specified on the command line.
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| 332 | *
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| 333 | * Fri, 8 Mar 1996 18:01:39, Swen Thuemmler <swen@uni-paderborn.de>:
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| 334 | * Omit the call to connect() for Linux version 1.3.11 or later.
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| 335 | *
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| 336 | * Wed Oct 1 23:55:28 1997: Dick Streefland <dick_streefland@tasking.com>
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| 337 | * Implemented the "bg", "fg" and "retry" mount options for NFS.
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| 338 | *
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| 339 | * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
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| 340 | * - added Native Language Support
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| 341 | *
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| 342 | * Modified by Olaf Kirch and Trond Myklebust for new NFS code,
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| 343 | * plus NFSv3 stuff.
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| 344 | */
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[821] | 345 |
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[1770] | 346 | /* This is just a warning of a common mistake. Possibly this should be a
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| 347 | * uclibc faq entry rather than in busybox... */
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| 348 | #if defined(__UCLIBC__) && ! defined(__UCLIBC_HAS_RPC__)
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| 349 | #error "You need to build uClibc with UCLIBC_HAS_RPC for NFS support."
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| 350 | #endif
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| 351 |
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| 352 | #define MOUNTPORT 635
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| 353 | #define MNTPATHLEN 1024
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| 354 | #define MNTNAMLEN 255
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| 355 | #define FHSIZE 32
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| 356 | #define FHSIZE3 64
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| 357 |
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| 358 | typedef char fhandle[FHSIZE];
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| 359 |
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| 360 | typedef struct {
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| 361 | unsigned int fhandle3_len;
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| 362 | char *fhandle3_val;
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| 363 | } fhandle3;
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| 364 |
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| 365 | enum mountstat3 {
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| 366 | MNT_OK = 0,
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| 367 | MNT3ERR_PERM = 1,
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| 368 | MNT3ERR_NOENT = 2,
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| 369 | MNT3ERR_IO = 5,
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| 370 | MNT3ERR_ACCES = 13,
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| 371 | MNT3ERR_NOTDIR = 20,
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| 372 | MNT3ERR_INVAL = 22,
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| 373 | MNT3ERR_NAMETOOLONG = 63,
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| 374 | MNT3ERR_NOTSUPP = 10004,
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| 375 | MNT3ERR_SERVERFAULT = 10006,
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| 376 | };
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| 377 | typedef enum mountstat3 mountstat3;
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| 378 |
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| 379 | struct fhstatus {
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| 380 | unsigned int fhs_status;
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| 381 | union {
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| 382 | fhandle fhs_fhandle;
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| 383 | } fhstatus_u;
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| 384 | };
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| 385 | typedef struct fhstatus fhstatus;
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| 386 |
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| 387 | struct mountres3_ok {
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| 388 | fhandle3 fhandle;
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| 389 | struct {
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| 390 | unsigned int auth_flavours_len;
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| 391 | char *auth_flavours_val;
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| 392 | } auth_flavours;
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| 393 | };
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| 394 | typedef struct mountres3_ok mountres3_ok;
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| 395 |
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| 396 | struct mountres3 {
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| 397 | mountstat3 fhs_status;
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| 398 | union {
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| 399 | mountres3_ok mountinfo;
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| 400 | } mountres3_u;
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| 401 | };
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| 402 | typedef struct mountres3 mountres3;
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| 403 |
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| 404 | typedef char *dirpath;
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| 405 |
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| 406 | typedef char *name;
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| 407 |
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| 408 | typedef struct mountbody *mountlist;
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| 409 |
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| 410 | struct mountbody {
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| 411 | name ml_hostname;
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| 412 | dirpath ml_directory;
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| 413 | mountlist ml_next;
|
---|
| 414 | };
|
---|
| 415 | typedef struct mountbody mountbody;
|
---|
| 416 |
|
---|
| 417 | typedef struct groupnode *groups;
|
---|
| 418 |
|
---|
| 419 | struct groupnode {
|
---|
| 420 | name gr_name;
|
---|
| 421 | groups gr_next;
|
---|
| 422 | };
|
---|
| 423 | typedef struct groupnode groupnode;
|
---|
| 424 |
|
---|
| 425 | typedef struct exportnode *exports;
|
---|
| 426 |
|
---|
| 427 | struct exportnode {
|
---|
| 428 | dirpath ex_dir;
|
---|
| 429 | groups ex_groups;
|
---|
| 430 | exports ex_next;
|
---|
| 431 | };
|
---|
| 432 | typedef struct exportnode exportnode;
|
---|
| 433 |
|
---|
| 434 | struct ppathcnf {
|
---|
| 435 | int pc_link_max;
|
---|
| 436 | short pc_max_canon;
|
---|
| 437 | short pc_max_input;
|
---|
| 438 | short pc_name_max;
|
---|
| 439 | short pc_path_max;
|
---|
| 440 | short pc_pipe_buf;
|
---|
| 441 | uint8_t pc_vdisable;
|
---|
| 442 | char pc_xxx;
|
---|
| 443 | short pc_mask[2];
|
---|
| 444 | };
|
---|
| 445 | typedef struct ppathcnf ppathcnf;
|
---|
| 446 |
|
---|
| 447 | #define MOUNTPROG 100005
|
---|
| 448 | #define MOUNTVERS 1
|
---|
| 449 |
|
---|
| 450 | #define MOUNTPROC_NULL 0
|
---|
| 451 | #define MOUNTPROC_MNT 1
|
---|
| 452 | #define MOUNTPROC_DUMP 2
|
---|
| 453 | #define MOUNTPROC_UMNT 3
|
---|
| 454 | #define MOUNTPROC_UMNTALL 4
|
---|
| 455 | #define MOUNTPROC_EXPORT 5
|
---|
| 456 | #define MOUNTPROC_EXPORTALL 6
|
---|
| 457 |
|
---|
| 458 | #define MOUNTVERS_POSIX 2
|
---|
| 459 |
|
---|
| 460 | #define MOUNTPROC_PATHCONF 7
|
---|
| 461 |
|
---|
| 462 | #define MOUNT_V3 3
|
---|
| 463 |
|
---|
| 464 | #define MOUNTPROC3_NULL 0
|
---|
| 465 | #define MOUNTPROC3_MNT 1
|
---|
| 466 | #define MOUNTPROC3_DUMP 2
|
---|
| 467 | #define MOUNTPROC3_UMNT 3
|
---|
| 468 | #define MOUNTPROC3_UMNTALL 4
|
---|
| 469 | #define MOUNTPROC3_EXPORT 5
|
---|
| 470 |
|
---|
| 471 | enum {
|
---|
| 472 | #ifndef NFS_FHSIZE
|
---|
| 473 | NFS_FHSIZE = 32,
|
---|
| 474 | #endif
|
---|
| 475 | #ifndef NFS_PORT
|
---|
| 476 | NFS_PORT = 2049
|
---|
| 477 | #endif
|
---|
| 478 | };
|
---|
| 479 |
|
---|
| 480 | /*
|
---|
| 481 | * We want to be able to compile mount on old kernels in such a way
|
---|
| 482 | * that the binary will work well on more recent kernels.
|
---|
| 483 | * Thus, if necessary we teach nfsmount.c the structure of new fields
|
---|
| 484 | * that will come later.
|
---|
| 485 | *
|
---|
| 486 | * Moreover, the new kernel includes conflict with glibc includes
|
---|
| 487 | * so it is easiest to ignore the kernel altogether (at compile time).
|
---|
| 488 | */
|
---|
| 489 |
|
---|
| 490 | struct nfs2_fh {
|
---|
| 491 | char data[32];
|
---|
| 492 | };
|
---|
| 493 | struct nfs3_fh {
|
---|
| 494 | unsigned short size;
|
---|
| 495 | unsigned char data[64];
|
---|
| 496 | };
|
---|
| 497 |
|
---|
| 498 | struct nfs_mount_data {
|
---|
| 499 | int version; /* 1 */
|
---|
| 500 | int fd; /* 1 */
|
---|
| 501 | struct nfs2_fh old_root; /* 1 */
|
---|
| 502 | int flags; /* 1 */
|
---|
| 503 | int rsize; /* 1 */
|
---|
| 504 | int wsize; /* 1 */
|
---|
| 505 | int timeo; /* 1 */
|
---|
| 506 | int retrans; /* 1 */
|
---|
| 507 | int acregmin; /* 1 */
|
---|
| 508 | int acregmax; /* 1 */
|
---|
| 509 | int acdirmin; /* 1 */
|
---|
| 510 | int acdirmax; /* 1 */
|
---|
| 511 | struct sockaddr_in addr; /* 1 */
|
---|
| 512 | char hostname[256]; /* 1 */
|
---|
| 513 | int namlen; /* 2 */
|
---|
| 514 | unsigned int bsize; /* 3 */
|
---|
| 515 | struct nfs3_fh root; /* 4 */
|
---|
| 516 | };
|
---|
| 517 |
|
---|
| 518 | /* bits in the flags field */
|
---|
| 519 | enum {
|
---|
| 520 | NFS_MOUNT_SOFT = 0x0001, /* 1 */
|
---|
| 521 | NFS_MOUNT_INTR = 0x0002, /* 1 */
|
---|
| 522 | NFS_MOUNT_SECURE = 0x0004, /* 1 */
|
---|
| 523 | NFS_MOUNT_POSIX = 0x0008, /* 1 */
|
---|
| 524 | NFS_MOUNT_NOCTO = 0x0010, /* 1 */
|
---|
| 525 | NFS_MOUNT_NOAC = 0x0020, /* 1 */
|
---|
| 526 | NFS_MOUNT_TCP = 0x0040, /* 2 */
|
---|
| 527 | NFS_MOUNT_VER3 = 0x0080, /* 3 */
|
---|
| 528 | NFS_MOUNT_KERBEROS = 0x0100, /* 3 */
|
---|
| 529 | NFS_MOUNT_NONLM = 0x0200 /* 3 */
|
---|
| 530 | };
|
---|
| 531 |
|
---|
| 532 |
|
---|
| 533 | /*
|
---|
| 534 | * We need to translate between nfs status return values and
|
---|
| 535 | * the local errno values which may not be the same.
|
---|
| 536 | *
|
---|
| 537 | * Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de>: change errno:
|
---|
| 538 | * "after #include <errno.h> the symbol errno is reserved for any use,
|
---|
| 539 | * it cannot even be used as a struct tag or field name".
|
---|
| 540 | */
|
---|
| 541 |
|
---|
| 542 | #ifndef EDQUOT
|
---|
| 543 | #define EDQUOT ENOSPC
|
---|
| 544 | #endif
|
---|
| 545 |
|
---|
| 546 | // Convert each NFSERR_BLAH into EBLAH
|
---|
| 547 |
|
---|
| 548 | static const struct {
|
---|
| 549 | int stat;
|
---|
| 550 | int errnum;
|
---|
| 551 | } nfs_errtbl[] = {
|
---|
| 552 | {0,0}, {1,EPERM}, {2,ENOENT}, {5,EIO}, {6,ENXIO}, {13,EACCES}, {17,EEXIST},
|
---|
| 553 | {19,ENODEV}, {20,ENOTDIR}, {21,EISDIR}, {22,EINVAL}, {27,EFBIG},
|
---|
| 554 | {28,ENOSPC}, {30,EROFS}, {63,ENAMETOOLONG}, {66,ENOTEMPTY}, {69,EDQUOT},
|
---|
| 555 | {70,ESTALE}, {71,EREMOTE}, {-1,EIO}
|
---|
| 556 | };
|
---|
| 557 |
|
---|
| 558 | static char *nfs_strerror(int status)
|
---|
| 559 | {
|
---|
| 560 | int i;
|
---|
| 561 | static char buf[sizeof("unknown nfs status return value: ") + sizeof(int)*3];
|
---|
| 562 |
|
---|
| 563 | for (i = 0; nfs_errtbl[i].stat != -1; i++) {
|
---|
| 564 | if (nfs_errtbl[i].stat == status)
|
---|
| 565 | return strerror(nfs_errtbl[i].errnum);
|
---|
| 566 | }
|
---|
| 567 | sprintf(buf, "unknown nfs status return value: %d", status);
|
---|
| 568 | return buf;
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 | static bool_t xdr_fhandle(XDR *xdrs, fhandle objp)
|
---|
| 572 | {
|
---|
| 573 | if (!xdr_opaque(xdrs, objp, FHSIZE))
|
---|
| 574 | return FALSE;
|
---|
| 575 | return TRUE;
|
---|
| 576 | }
|
---|
| 577 |
|
---|
| 578 | static bool_t xdr_fhstatus(XDR *xdrs, fhstatus *objp)
|
---|
| 579 | {
|
---|
| 580 | if (!xdr_u_int(xdrs, &objp->fhs_status))
|
---|
| 581 | return FALSE;
|
---|
| 582 | switch (objp->fhs_status) {
|
---|
| 583 | case 0:
|
---|
| 584 | if (!xdr_fhandle(xdrs, objp->fhstatus_u.fhs_fhandle))
|
---|
| 585 | return FALSE;
|
---|
| 586 | break;
|
---|
| 587 | default:
|
---|
| 588 | break;
|
---|
| 589 | }
|
---|
| 590 | return TRUE;
|
---|
| 591 | }
|
---|
| 592 |
|
---|
| 593 | static bool_t xdr_dirpath(XDR *xdrs, dirpath *objp)
|
---|
| 594 | {
|
---|
| 595 | if (!xdr_string(xdrs, objp, MNTPATHLEN))
|
---|
| 596 | return FALSE;
|
---|
| 597 | return TRUE;
|
---|
| 598 | }
|
---|
| 599 |
|
---|
| 600 | static bool_t xdr_fhandle3(XDR *xdrs, fhandle3 *objp)
|
---|
| 601 | {
|
---|
| 602 | if (!xdr_bytes(xdrs, (char **)&objp->fhandle3_val, (unsigned int *) &objp->fhandle3_len, FHSIZE3))
|
---|
| 603 | return FALSE;
|
---|
| 604 | return TRUE;
|
---|
| 605 | }
|
---|
| 606 |
|
---|
| 607 | static bool_t xdr_mountres3_ok(XDR *xdrs, mountres3_ok *objp)
|
---|
| 608 | {
|
---|
| 609 | if (!xdr_fhandle3(xdrs, &objp->fhandle))
|
---|
| 610 | return FALSE;
|
---|
| 611 | if (!xdr_array(xdrs, &(objp->auth_flavours.auth_flavours_val), &(objp->auth_flavours.auth_flavours_len), ~0,
|
---|
| 612 | sizeof (int), (xdrproc_t) xdr_int))
|
---|
| 613 | return FALSE;
|
---|
| 614 | return TRUE;
|
---|
| 615 | }
|
---|
| 616 |
|
---|
| 617 | static bool_t xdr_mountstat3(XDR *xdrs, mountstat3 *objp)
|
---|
| 618 | {
|
---|
| 619 | if (!xdr_enum(xdrs, (enum_t *) objp))
|
---|
| 620 | return FALSE;
|
---|
| 621 | return TRUE;
|
---|
| 622 | }
|
---|
| 623 |
|
---|
| 624 | static bool_t xdr_mountres3(XDR *xdrs, mountres3 *objp)
|
---|
| 625 | {
|
---|
| 626 | if (!xdr_mountstat3(xdrs, &objp->fhs_status))
|
---|
| 627 | return FALSE;
|
---|
| 628 | switch (objp->fhs_status) {
|
---|
| 629 | case MNT_OK:
|
---|
| 630 | if (!xdr_mountres3_ok(xdrs, &objp->mountres3_u.mountinfo))
|
---|
| 631 | return FALSE;
|
---|
| 632 | break;
|
---|
| 633 | default:
|
---|
| 634 | break;
|
---|
| 635 | }
|
---|
| 636 | return TRUE;
|
---|
| 637 | }
|
---|
| 638 |
|
---|
| 639 | #define MAX_NFSPROT ((nfs_mount_version >= 4) ? 3 : 2)
|
---|
| 640 |
|
---|
| 641 | /*
|
---|
| 642 | * nfs_mount_version according to the sources seen at compile time.
|
---|
| 643 | */
|
---|
| 644 | static int nfs_mount_version;
|
---|
| 645 | static int kernel_version;
|
---|
| 646 |
|
---|
| 647 | /*
|
---|
| 648 | * Unfortunately, the kernel prints annoying console messages
|
---|
| 649 | * in case of an unexpected nfs mount version (instead of
|
---|
| 650 | * just returning some error). Therefore we'll have to try
|
---|
| 651 | * and figure out what version the kernel expects.
|
---|
| 652 | *
|
---|
| 653 | * Variables:
|
---|
| 654 | * KERNEL_NFS_MOUNT_VERSION: kernel sources at compile time
|
---|
| 655 | * NFS_MOUNT_VERSION: these nfsmount sources at compile time
|
---|
| 656 | * nfs_mount_version: version this source and running kernel can handle
|
---|
| 657 | */
|
---|
| 658 | static void
|
---|
| 659 | find_kernel_nfs_mount_version(void)
|
---|
| 660 | {
|
---|
| 661 | if (kernel_version)
|
---|
| 662 | return;
|
---|
| 663 |
|
---|
| 664 | nfs_mount_version = 4; /* default */
|
---|
| 665 |
|
---|
| 666 | kernel_version = get_linux_version_code();
|
---|
| 667 | if (kernel_version) {
|
---|
| 668 | if (kernel_version < KERNEL_VERSION(2,1,32))
|
---|
| 669 | nfs_mount_version = 1;
|
---|
| 670 | else if (kernel_version < KERNEL_VERSION(2,2,18) ||
|
---|
| 671 | (kernel_version >= KERNEL_VERSION(2,3,0) &&
|
---|
| 672 | kernel_version < KERNEL_VERSION(2,3,99)))
|
---|
| 673 | nfs_mount_version = 3;
|
---|
| 674 | /* else v4 since 2.3.99pre4 */
|
---|
| 675 | }
|
---|
| 676 | }
|
---|
| 677 |
|
---|
| 678 | static struct pmap *
|
---|
| 679 | get_mountport(struct sockaddr_in *server_addr,
|
---|
| 680 | long unsigned prog,
|
---|
| 681 | long unsigned version,
|
---|
| 682 | long unsigned proto,
|
---|
| 683 | long unsigned port)
|
---|
| 684 | {
|
---|
| 685 | struct pmaplist *pmap;
|
---|
| 686 | static struct pmap p = {0, 0, 0, 0};
|
---|
| 687 |
|
---|
| 688 | server_addr->sin_port = PMAPPORT;
|
---|
| 689 | /* glibc 2.4 (still) has pmap_getmaps(struct sockaddr_in *).
|
---|
| 690 | * I understand it like "IPv6 for this is not 100% ready" */
|
---|
| 691 | pmap = pmap_getmaps(server_addr);
|
---|
| 692 |
|
---|
| 693 | if (version > MAX_NFSPROT)
|
---|
| 694 | version = MAX_NFSPROT;
|
---|
| 695 | if (!prog)
|
---|
| 696 | prog = MOUNTPROG;
|
---|
| 697 | p.pm_prog = prog;
|
---|
| 698 | p.pm_vers = version;
|
---|
| 699 | p.pm_prot = proto;
|
---|
| 700 | p.pm_port = port;
|
---|
| 701 |
|
---|
| 702 | while (pmap) {
|
---|
| 703 | if (pmap->pml_map.pm_prog != prog)
|
---|
| 704 | goto next;
|
---|
| 705 | if (!version && p.pm_vers > pmap->pml_map.pm_vers)
|
---|
| 706 | goto next;
|
---|
| 707 | if (version > 2 && pmap->pml_map.pm_vers != version)
|
---|
| 708 | goto next;
|
---|
| 709 | if (version && version <= 2 && pmap->pml_map.pm_vers > 2)
|
---|
| 710 | goto next;
|
---|
| 711 | if (pmap->pml_map.pm_vers > MAX_NFSPROT ||
|
---|
| 712 | (proto && p.pm_prot && pmap->pml_map.pm_prot != proto) ||
|
---|
| 713 | (port && pmap->pml_map.pm_port != port))
|
---|
| 714 | goto next;
|
---|
| 715 | memcpy(&p, &pmap->pml_map, sizeof(p));
|
---|
| 716 | next:
|
---|
| 717 | pmap = pmap->pml_next;
|
---|
| 718 | }
|
---|
| 719 | if (!p.pm_vers)
|
---|
| 720 | p.pm_vers = MOUNTVERS;
|
---|
| 721 | if (!p.pm_port)
|
---|
| 722 | p.pm_port = MOUNTPORT;
|
---|
| 723 | if (!p.pm_prot)
|
---|
| 724 | p.pm_prot = IPPROTO_TCP;
|
---|
| 725 | return &p;
|
---|
| 726 | }
|
---|
| 727 |
|
---|
| 728 | static int daemonize(void)
|
---|
| 729 | {
|
---|
| 730 | int fd;
|
---|
| 731 | int pid = fork();
|
---|
| 732 | if (pid < 0) /* error */
|
---|
| 733 | return -errno;
|
---|
| 734 | if (pid > 0) /* parent */
|
---|
| 735 | return 0;
|
---|
| 736 | /* child */
|
---|
| 737 | fd = xopen(bb_dev_null, O_RDWR);
|
---|
| 738 | dup2(fd, 0);
|
---|
| 739 | dup2(fd, 1);
|
---|
| 740 | dup2(fd, 2);
|
---|
| 741 | while (fd > 2) close(fd--);
|
---|
| 742 | setsid();
|
---|
| 743 | openlog(applet_name, LOG_PID, LOG_DAEMON);
|
---|
| 744 | logmode = LOGMODE_SYSLOG;
|
---|
| 745 | return 1;
|
---|
| 746 | }
|
---|
| 747 |
|
---|
| 748 | // TODO
|
---|
| 749 | static inline int we_saw_this_host_before(const char *hostname)
|
---|
| 750 | {
|
---|
| 751 | return 0;
|
---|
| 752 | }
|
---|
| 753 |
|
---|
| 754 | /* RPC strerror analogs are terminally idiotic:
|
---|
| 755 | * *mandatory* prefix and \n at end.
|
---|
| 756 | * This hopefully helps. Usage:
|
---|
| 757 | * error_msg_rpc(clnt_*error*(" ")) */
|
---|
| 758 | static void error_msg_rpc(const char *msg)
|
---|
| 759 | {
|
---|
| 760 | int len;
|
---|
| 761 | while (msg[0] == ' ' || msg[0] == ':') msg++;
|
---|
| 762 | len = strlen(msg);
|
---|
| 763 | while (len && msg[len-1] == '\n') len--;
|
---|
| 764 | bb_error_msg("%.*s", len, msg);
|
---|
| 765 | }
|
---|
| 766 |
|
---|
| 767 | // NB: mp->xxx fields may be trashed on exit
|
---|
| 768 | static int nfsmount(struct mntent *mp, int vfsflags, char *filteropts)
|
---|
| 769 | {
|
---|
| 770 | CLIENT *mclient;
|
---|
| 771 | char *hostname;
|
---|
| 772 | char *pathname;
|
---|
| 773 | char *mounthost;
|
---|
| 774 | struct nfs_mount_data data;
|
---|
| 775 | char *opt;
|
---|
| 776 | struct hostent *hp;
|
---|
| 777 | struct sockaddr_in server_addr;
|
---|
| 778 | struct sockaddr_in mount_server_addr;
|
---|
| 779 | int msock, fsock;
|
---|
| 780 | union {
|
---|
| 781 | struct fhstatus nfsv2;
|
---|
| 782 | struct mountres3 nfsv3;
|
---|
| 783 | } status;
|
---|
| 784 | int daemonized;
|
---|
| 785 | char *s;
|
---|
| 786 | int port;
|
---|
| 787 | int mountport;
|
---|
| 788 | int proto;
|
---|
| 789 | int bg;
|
---|
| 790 | int soft;
|
---|
| 791 | int intr;
|
---|
| 792 | int posix;
|
---|
| 793 | int nocto;
|
---|
| 794 | int noac;
|
---|
| 795 | int nolock;
|
---|
| 796 | int retry;
|
---|
| 797 | int tcp;
|
---|
| 798 | int mountprog;
|
---|
| 799 | int mountvers;
|
---|
| 800 | int nfsprog;
|
---|
| 801 | int nfsvers;
|
---|
| 802 | int retval;
|
---|
| 803 |
|
---|
| 804 | find_kernel_nfs_mount_version();
|
---|
| 805 |
|
---|
| 806 | daemonized = 0;
|
---|
| 807 | mounthost = NULL;
|
---|
| 808 | retval = ETIMEDOUT;
|
---|
| 809 | msock = fsock = -1;
|
---|
| 810 | mclient = NULL;
|
---|
| 811 |
|
---|
| 812 | /* NB: hostname, mounthost, filteropts must be free()d prior to return */
|
---|
| 813 |
|
---|
| 814 | filteropts = xstrdup(filteropts); /* going to trash it later... */
|
---|
| 815 |
|
---|
| 816 | hostname = xstrdup(mp->mnt_fsname);
|
---|
| 817 | /* mount_main() guarantees that ':' is there */
|
---|
| 818 | s = strchr(hostname, ':');
|
---|
| 819 | pathname = s + 1;
|
---|
| 820 | *s = '\0';
|
---|
| 821 | /* Ignore all but first hostname in replicated mounts
|
---|
| 822 | until they can be fully supported. (mack@sgi.com) */
|
---|
| 823 | s = strchr(hostname, ',');
|
---|
| 824 | if (s) {
|
---|
| 825 | *s = '\0';
|
---|
| 826 | bb_error_msg("warning: multiple hostnames not supported");
|
---|
| 827 | }
|
---|
| 828 |
|
---|
| 829 | server_addr.sin_family = AF_INET;
|
---|
| 830 | if (!inet_aton(hostname, &server_addr.sin_addr)) {
|
---|
| 831 | hp = gethostbyname(hostname);
|
---|
| 832 | if (hp == NULL) {
|
---|
| 833 | bb_herror_msg("%s", hostname);
|
---|
| 834 | goto fail;
|
---|
| 835 | }
|
---|
| 836 | if (hp->h_length > sizeof(struct in_addr)) {
|
---|
| 837 | bb_error_msg("got bad hp->h_length");
|
---|
| 838 | hp->h_length = sizeof(struct in_addr);
|
---|
| 839 | }
|
---|
| 840 | memcpy(&server_addr.sin_addr,
|
---|
| 841 | hp->h_addr, hp->h_length);
|
---|
| 842 | }
|
---|
| 843 |
|
---|
| 844 | memcpy(&mount_server_addr, &server_addr, sizeof(mount_server_addr));
|
---|
| 845 |
|
---|
| 846 | /* add IP address to mtab options for use when unmounting */
|
---|
| 847 |
|
---|
| 848 | if (!mp->mnt_opts) { /* TODO: actually mp->mnt_opts is never NULL */
|
---|
| 849 | mp->mnt_opts = xasprintf("addr=%s", inet_ntoa(server_addr.sin_addr));
|
---|
| 850 | } else {
|
---|
| 851 | char *tmp = xasprintf("%s%saddr=%s", mp->mnt_opts,
|
---|
| 852 | mp->mnt_opts[0] ? "," : "",
|
---|
| 853 | inet_ntoa(server_addr.sin_addr));
|
---|
| 854 | free(mp->mnt_opts);
|
---|
| 855 | mp->mnt_opts = tmp;
|
---|
| 856 | }
|
---|
| 857 |
|
---|
| 858 | /* Set default options.
|
---|
| 859 | * rsize/wsize (and bsize, for ver >= 3) are left 0 in order to
|
---|
| 860 | * let the kernel decide.
|
---|
| 861 | * timeo is filled in after we know whether it'll be TCP or UDP. */
|
---|
| 862 | memset(&data, 0, sizeof(data));
|
---|
| 863 | data.retrans = 3;
|
---|
| 864 | data.acregmin = 3;
|
---|
| 865 | data.acregmax = 60;
|
---|
| 866 | data.acdirmin = 30;
|
---|
| 867 | data.acdirmax = 60;
|
---|
| 868 | data.namlen = NAME_MAX;
|
---|
| 869 |
|
---|
| 870 | bg = 0;
|
---|
| 871 | soft = 0;
|
---|
| 872 | intr = 0;
|
---|
| 873 | posix = 0;
|
---|
| 874 | nocto = 0;
|
---|
| 875 | nolock = 0;
|
---|
| 876 | noac = 0;
|
---|
| 877 | retry = 10000; /* 10000 minutes ~ 1 week */
|
---|
| 878 | tcp = 0;
|
---|
| 879 |
|
---|
| 880 | mountprog = MOUNTPROG;
|
---|
| 881 | mountvers = 0;
|
---|
| 882 | port = 0;
|
---|
| 883 | mountport = 0;
|
---|
| 884 | nfsprog = 100003;
|
---|
| 885 | nfsvers = 0;
|
---|
| 886 |
|
---|
| 887 | /* parse options */
|
---|
| 888 | if (filteropts) for (opt = strtok(filteropts, ","); opt; opt = strtok(NULL, ",")) {
|
---|
| 889 | char *opteq = strchr(opt, '=');
|
---|
| 890 | if (opteq) {
|
---|
| 891 | static const char options[] ALIGN1 =
|
---|
| 892 | /* 0 */ "rsize\0"
|
---|
| 893 | /* 1 */ "wsize\0"
|
---|
| 894 | /* 2 */ "timeo\0"
|
---|
| 895 | /* 3 */ "retrans\0"
|
---|
| 896 | /* 4 */ "acregmin\0"
|
---|
| 897 | /* 5 */ "acregmax\0"
|
---|
| 898 | /* 6 */ "acdirmin\0"
|
---|
| 899 | /* 7 */ "acdirmax\0"
|
---|
| 900 | /* 8 */ "actimeo\0"
|
---|
| 901 | /* 9 */ "retry\0"
|
---|
| 902 | /* 10 */ "port\0"
|
---|
| 903 | /* 11 */ "mountport\0"
|
---|
| 904 | /* 12 */ "mounthost\0"
|
---|
| 905 | /* 13 */ "mountprog\0"
|
---|
| 906 | /* 14 */ "mountvers\0"
|
---|
| 907 | /* 15 */ "nfsprog\0"
|
---|
| 908 | /* 16 */ "nfsvers\0"
|
---|
| 909 | /* 17 */ "vers\0"
|
---|
| 910 | /* 18 */ "proto\0"
|
---|
| 911 | /* 19 */ "namlen\0"
|
---|
| 912 | /* 20 */ "addr\0";
|
---|
| 913 | int val = xatoi_u(opteq + 1);
|
---|
| 914 | *opteq = '\0';
|
---|
| 915 | switch (index_in_strings(options, opt)) {
|
---|
| 916 | case 0: // "rsize"
|
---|
| 917 | data.rsize = val;
|
---|
| 918 | break;
|
---|
| 919 | case 1: // "wsize"
|
---|
| 920 | data.wsize = val;
|
---|
| 921 | break;
|
---|
| 922 | case 2: // "timeo"
|
---|
| 923 | data.timeo = val;
|
---|
| 924 | break;
|
---|
| 925 | case 3: // "retrans"
|
---|
| 926 | data.retrans = val;
|
---|
| 927 | break;
|
---|
| 928 | case 4: // "acregmin"
|
---|
| 929 | data.acregmin = val;
|
---|
| 930 | break;
|
---|
| 931 | case 5: // "acregmax"
|
---|
| 932 | data.acregmax = val;
|
---|
| 933 | break;
|
---|
| 934 | case 6: // "acdirmin"
|
---|
| 935 | data.acdirmin = val;
|
---|
| 936 | break;
|
---|
| 937 | case 7: // "acdirmax"
|
---|
| 938 | data.acdirmax = val;
|
---|
| 939 | break;
|
---|
| 940 | case 8: // "actimeo"
|
---|
| 941 | data.acregmin = val;
|
---|
| 942 | data.acregmax = val;
|
---|
| 943 | data.acdirmin = val;
|
---|
| 944 | data.acdirmax = val;
|
---|
| 945 | break;
|
---|
| 946 | case 9: // "retry"
|
---|
| 947 | retry = val;
|
---|
| 948 | break;
|
---|
| 949 | case 10: // "port"
|
---|
| 950 | port = val;
|
---|
| 951 | break;
|
---|
| 952 | case 11: // "mountport"
|
---|
| 953 | mountport = val;
|
---|
| 954 | break;
|
---|
| 955 | case 12: // "mounthost"
|
---|
| 956 | mounthost = xstrndup(opteq+1,
|
---|
| 957 | strcspn(opteq+1," \t\n\r,"));
|
---|
| 958 | break;
|
---|
| 959 | case 13: // "mountprog"
|
---|
| 960 | mountprog = val;
|
---|
| 961 | break;
|
---|
| 962 | case 14: // "mountvers"
|
---|
| 963 | mountvers = val;
|
---|
| 964 | break;
|
---|
| 965 | case 15: // "nfsprog"
|
---|
| 966 | nfsprog = val;
|
---|
| 967 | break;
|
---|
| 968 | case 16: // "nfsvers"
|
---|
| 969 | case 17: // "vers"
|
---|
| 970 | nfsvers = val;
|
---|
| 971 | break;
|
---|
| 972 | case 18: // "proto"
|
---|
| 973 | if (!strncmp(opteq+1, "tcp", 3))
|
---|
| 974 | tcp = 1;
|
---|
| 975 | else if (!strncmp(opteq+1, "udp", 3))
|
---|
| 976 | tcp = 0;
|
---|
| 977 | else
|
---|
| 978 | bb_error_msg("warning: unrecognized proto= option");
|
---|
| 979 | break;
|
---|
| 980 | case 19: // "namlen"
|
---|
| 981 | if (nfs_mount_version >= 2)
|
---|
| 982 | data.namlen = val;
|
---|
| 983 | else
|
---|
| 984 | bb_error_msg("warning: option namlen is not supported\n");
|
---|
| 985 | break;
|
---|
| 986 | case 20: // "addr" - ignore
|
---|
| 987 | break;
|
---|
| 988 | default:
|
---|
| 989 | bb_error_msg("unknown nfs mount parameter: %s=%d", opt, val);
|
---|
| 990 | goto fail;
|
---|
| 991 | }
|
---|
| 992 | }
|
---|
| 993 | else {
|
---|
| 994 | static const char options[] ALIGN1 =
|
---|
| 995 | "bg\0"
|
---|
| 996 | "fg\0"
|
---|
| 997 | "soft\0"
|
---|
| 998 | "hard\0"
|
---|
| 999 | "intr\0"
|
---|
| 1000 | "posix\0"
|
---|
| 1001 | "cto\0"
|
---|
| 1002 | "ac\0"
|
---|
| 1003 | "tcp\0"
|
---|
| 1004 | "udp\0"
|
---|
| 1005 | "lock\0";
|
---|
| 1006 | int val = 1;
|
---|
| 1007 | if (!strncmp(opt, "no", 2)) {
|
---|
| 1008 | val = 0;
|
---|
| 1009 | opt += 2;
|
---|
| 1010 | }
|
---|
| 1011 | switch (index_in_strings(options, opt)) {
|
---|
| 1012 | case 0: // "bg"
|
---|
| 1013 | bg = val;
|
---|
| 1014 | break;
|
---|
| 1015 | case 1: // "fg"
|
---|
| 1016 | bg = !val;
|
---|
| 1017 | break;
|
---|
| 1018 | case 2: // "soft"
|
---|
| 1019 | soft = val;
|
---|
| 1020 | break;
|
---|
| 1021 | case 3: // "hard"
|
---|
| 1022 | soft = !val;
|
---|
| 1023 | break;
|
---|
| 1024 | case 4: // "intr"
|
---|
| 1025 | intr = val;
|
---|
| 1026 | break;
|
---|
| 1027 | case 5: // "posix"
|
---|
| 1028 | posix = val;
|
---|
| 1029 | break;
|
---|
| 1030 | case 6: // "cto"
|
---|
| 1031 | nocto = !val;
|
---|
| 1032 | break;
|
---|
| 1033 | case 7: // "ac"
|
---|
| 1034 | noac = !val;
|
---|
| 1035 | break;
|
---|
| 1036 | case 8: // "tcp"
|
---|
| 1037 | tcp = val;
|
---|
| 1038 | break;
|
---|
| 1039 | case 9: // "udp"
|
---|
| 1040 | tcp = !val;
|
---|
| 1041 | break;
|
---|
| 1042 | case 10: // "lock"
|
---|
| 1043 | if (nfs_mount_version >= 3)
|
---|
| 1044 | nolock = !val;
|
---|
| 1045 | else
|
---|
| 1046 | bb_error_msg("warning: option nolock is not supported");
|
---|
| 1047 | break;
|
---|
| 1048 | default:
|
---|
| 1049 | bb_error_msg("unknown nfs mount option: %s%s", val ? "" : "no", opt);
|
---|
| 1050 | goto fail;
|
---|
| 1051 | }
|
---|
| 1052 | }
|
---|
| 1053 | }
|
---|
| 1054 | proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
|
---|
| 1055 |
|
---|
| 1056 | data.flags = (soft ? NFS_MOUNT_SOFT : 0)
|
---|
| 1057 | | (intr ? NFS_MOUNT_INTR : 0)
|
---|
| 1058 | | (posix ? NFS_MOUNT_POSIX : 0)
|
---|
| 1059 | | (nocto ? NFS_MOUNT_NOCTO : 0)
|
---|
| 1060 | | (noac ? NFS_MOUNT_NOAC : 0);
|
---|
| 1061 | if (nfs_mount_version >= 2)
|
---|
| 1062 | data.flags |= (tcp ? NFS_MOUNT_TCP : 0);
|
---|
| 1063 | if (nfs_mount_version >= 3)
|
---|
| 1064 | data.flags |= (nolock ? NFS_MOUNT_NONLM : 0);
|
---|
| 1065 | if (nfsvers > MAX_NFSPROT || mountvers > MAX_NFSPROT) {
|
---|
| 1066 | bb_error_msg("NFSv%d not supported", nfsvers);
|
---|
| 1067 | goto fail;
|
---|
| 1068 | }
|
---|
| 1069 | if (nfsvers && !mountvers)
|
---|
| 1070 | mountvers = (nfsvers < 3) ? 1 : nfsvers;
|
---|
| 1071 | if (nfsvers && nfsvers < mountvers) {
|
---|
| 1072 | mountvers = nfsvers;
|
---|
| 1073 | }
|
---|
| 1074 |
|
---|
| 1075 | /* Adjust options if none specified */
|
---|
| 1076 | if (!data.timeo)
|
---|
| 1077 | data.timeo = tcp ? 70 : 7;
|
---|
| 1078 |
|
---|
| 1079 | data.version = nfs_mount_version;
|
---|
| 1080 |
|
---|
| 1081 | if (vfsflags & MS_REMOUNT)
|
---|
| 1082 | goto do_mount;
|
---|
| 1083 |
|
---|
| 1084 | /*
|
---|
| 1085 | * If the previous mount operation on the same host was
|
---|
| 1086 | * backgrounded, and the "bg" for this mount is also set,
|
---|
| 1087 | * give up immediately, to avoid the initial timeout.
|
---|
| 1088 | */
|
---|
| 1089 | if (bg && we_saw_this_host_before(hostname)) {
|
---|
| 1090 | daemonized = daemonize(); /* parent or error */
|
---|
| 1091 | if (daemonized <= 0) { /* parent or error */
|
---|
| 1092 | retval = -daemonized;
|
---|
| 1093 | goto ret;
|
---|
| 1094 | }
|
---|
| 1095 | }
|
---|
| 1096 |
|
---|
| 1097 | /* create mount daemon client */
|
---|
| 1098 | /* See if the nfs host = mount host. */
|
---|
| 1099 | if (mounthost) {
|
---|
| 1100 | if (mounthost[0] >= '0' && mounthost[0] <= '9') {
|
---|
| 1101 | mount_server_addr.sin_family = AF_INET;
|
---|
| 1102 | mount_server_addr.sin_addr.s_addr = inet_addr(hostname);
|
---|
| 1103 | } else {
|
---|
| 1104 | hp = gethostbyname(mounthost);
|
---|
| 1105 | if (hp == NULL) {
|
---|
| 1106 | bb_herror_msg("%s", mounthost);
|
---|
| 1107 | goto fail;
|
---|
| 1108 | } else {
|
---|
| 1109 | if (hp->h_length > sizeof(struct in_addr)) {
|
---|
| 1110 | bb_error_msg("got bad hp->h_length?");
|
---|
| 1111 | hp->h_length = sizeof(struct in_addr);
|
---|
| 1112 | }
|
---|
| 1113 | mount_server_addr.sin_family = AF_INET;
|
---|
| 1114 | memcpy(&mount_server_addr.sin_addr,
|
---|
| 1115 | hp->h_addr, hp->h_length);
|
---|
| 1116 | }
|
---|
| 1117 | }
|
---|
| 1118 | }
|
---|
| 1119 |
|
---|
| 1120 | /*
|
---|
| 1121 | * The following loop implements the mount retries. When the mount
|
---|
| 1122 | * times out, and the "bg" option is set, we background ourself
|
---|
| 1123 | * and continue trying.
|
---|
| 1124 | *
|
---|
| 1125 | * The case where the mount point is not present and the "bg"
|
---|
| 1126 | * option is set, is treated as a timeout. This is done to
|
---|
| 1127 | * support nested mounts.
|
---|
| 1128 | *
|
---|
| 1129 | * The "retry" count specified by the user is the number of
|
---|
| 1130 | * minutes to retry before giving up.
|
---|
| 1131 | */
|
---|
| 1132 | {
|
---|
| 1133 | struct timeval total_timeout;
|
---|
| 1134 | struct timeval retry_timeout;
|
---|
| 1135 | struct pmap* pm_mnt;
|
---|
| 1136 | time_t t;
|
---|
| 1137 | time_t prevt;
|
---|
| 1138 | time_t timeout;
|
---|
| 1139 |
|
---|
| 1140 | retry_timeout.tv_sec = 3;
|
---|
| 1141 | retry_timeout.tv_usec = 0;
|
---|
| 1142 | total_timeout.tv_sec = 20;
|
---|
| 1143 | total_timeout.tv_usec = 0;
|
---|
| 1144 | timeout = time(NULL) + 60 * retry;
|
---|
| 1145 | prevt = 0;
|
---|
| 1146 | t = 30;
|
---|
| 1147 | retry:
|
---|
| 1148 | /* be careful not to use too many CPU cycles */
|
---|
| 1149 | if (t - prevt < 30)
|
---|
| 1150 | sleep(30);
|
---|
| 1151 |
|
---|
| 1152 | pm_mnt = get_mountport(&mount_server_addr,
|
---|
| 1153 | mountprog,
|
---|
| 1154 | mountvers,
|
---|
| 1155 | proto,
|
---|
| 1156 | mountport);
|
---|
| 1157 | nfsvers = (pm_mnt->pm_vers < 2) ? 2 : pm_mnt->pm_vers;
|
---|
| 1158 |
|
---|
| 1159 | /* contact the mount daemon via TCP */
|
---|
| 1160 | mount_server_addr.sin_port = htons(pm_mnt->pm_port);
|
---|
| 1161 | msock = RPC_ANYSOCK;
|
---|
| 1162 |
|
---|
| 1163 | switch (pm_mnt->pm_prot) {
|
---|
| 1164 | case IPPROTO_UDP:
|
---|
| 1165 | mclient = clntudp_create(&mount_server_addr,
|
---|
| 1166 | pm_mnt->pm_prog,
|
---|
| 1167 | pm_mnt->pm_vers,
|
---|
| 1168 | retry_timeout,
|
---|
| 1169 | &msock);
|
---|
| 1170 | if (mclient)
|
---|
| 1171 | break;
|
---|
| 1172 | mount_server_addr.sin_port = htons(pm_mnt->pm_port);
|
---|
| 1173 | msock = RPC_ANYSOCK;
|
---|
| 1174 | case IPPROTO_TCP:
|
---|
| 1175 | mclient = clnttcp_create(&mount_server_addr,
|
---|
| 1176 | pm_mnt->pm_prog,
|
---|
| 1177 | pm_mnt->pm_vers,
|
---|
| 1178 | &msock, 0, 0);
|
---|
| 1179 | break;
|
---|
| 1180 | default:
|
---|
| 1181 | mclient = 0;
|
---|
| 1182 | }
|
---|
| 1183 | if (!mclient) {
|
---|
| 1184 | if (!daemonized && prevt == 0)
|
---|
| 1185 | error_msg_rpc(clnt_spcreateerror(" "));
|
---|
| 1186 | } else {
|
---|
| 1187 | enum clnt_stat clnt_stat;
|
---|
| 1188 | /* try to mount hostname:pathname */
|
---|
| 1189 | mclient->cl_auth = authunix_create_default();
|
---|
| 1190 |
|
---|
| 1191 | /* make pointers in xdr_mountres3 NULL so
|
---|
| 1192 | * that xdr_array allocates memory for us
|
---|
| 1193 | */
|
---|
| 1194 | memset(&status, 0, sizeof(status));
|
---|
| 1195 |
|
---|
| 1196 | if (pm_mnt->pm_vers == 3)
|
---|
| 1197 | clnt_stat = clnt_call(mclient, MOUNTPROC3_MNT,
|
---|
| 1198 | (xdrproc_t) xdr_dirpath,
|
---|
| 1199 | (caddr_t) &pathname,
|
---|
| 1200 | (xdrproc_t) xdr_mountres3,
|
---|
| 1201 | (caddr_t) &status,
|
---|
| 1202 | total_timeout);
|
---|
| 1203 | else
|
---|
| 1204 | clnt_stat = clnt_call(mclient, MOUNTPROC_MNT,
|
---|
| 1205 | (xdrproc_t) xdr_dirpath,
|
---|
| 1206 | (caddr_t) &pathname,
|
---|
| 1207 | (xdrproc_t) xdr_fhstatus,
|
---|
| 1208 | (caddr_t) &status,
|
---|
| 1209 | total_timeout);
|
---|
| 1210 |
|
---|
| 1211 | if (clnt_stat == RPC_SUCCESS)
|
---|
| 1212 | goto prepare_kernel_data; /* we're done */
|
---|
| 1213 | if (errno != ECONNREFUSED) {
|
---|
| 1214 | error_msg_rpc(clnt_sperror(mclient, " "));
|
---|
| 1215 | goto fail; /* don't retry */
|
---|
| 1216 | }
|
---|
| 1217 | /* Connection refused */
|
---|
| 1218 | if (!daemonized && prevt == 0) /* print just once */
|
---|
| 1219 | error_msg_rpc(clnt_sperror(mclient, " "));
|
---|
| 1220 | auth_destroy(mclient->cl_auth);
|
---|
| 1221 | clnt_destroy(mclient);
|
---|
| 1222 | mclient = 0;
|
---|
| 1223 | close(msock);
|
---|
| 1224 | }
|
---|
| 1225 |
|
---|
| 1226 | /* Timeout. We are going to retry... maybe */
|
---|
| 1227 |
|
---|
| 1228 | if (!bg)
|
---|
| 1229 | goto fail;
|
---|
| 1230 | if (!daemonized) {
|
---|
| 1231 | daemonized = daemonize();
|
---|
| 1232 | if (daemonized <= 0) { /* parent or error */
|
---|
| 1233 | retval = -daemonized;
|
---|
| 1234 | goto ret;
|
---|
| 1235 | }
|
---|
| 1236 | }
|
---|
| 1237 | prevt = t;
|
---|
| 1238 | t = time(NULL);
|
---|
| 1239 | if (t >= timeout)
|
---|
| 1240 | /* TODO error message */
|
---|
| 1241 | goto fail;
|
---|
| 1242 |
|
---|
| 1243 | goto retry;
|
---|
| 1244 | }
|
---|
| 1245 |
|
---|
| 1246 | prepare_kernel_data:
|
---|
| 1247 |
|
---|
| 1248 | if (nfsvers == 2) {
|
---|
| 1249 | if (status.nfsv2.fhs_status != 0) {
|
---|
| 1250 | bb_error_msg("%s:%s failed, reason given by server: %s",
|
---|
| 1251 | hostname, pathname,
|
---|
| 1252 | nfs_strerror(status.nfsv2.fhs_status));
|
---|
| 1253 | goto fail;
|
---|
| 1254 | }
|
---|
| 1255 | memcpy(data.root.data,
|
---|
| 1256 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
|
---|
| 1257 | NFS_FHSIZE);
|
---|
| 1258 | data.root.size = NFS_FHSIZE;
|
---|
| 1259 | memcpy(data.old_root.data,
|
---|
| 1260 | (char *) status.nfsv2.fhstatus_u.fhs_fhandle,
|
---|
| 1261 | NFS_FHSIZE);
|
---|
| 1262 | } else {
|
---|
| 1263 | fhandle3 *my_fhandle;
|
---|
| 1264 | if (status.nfsv3.fhs_status != 0) {
|
---|
| 1265 | bb_error_msg("%s:%s failed, reason given by server: %s",
|
---|
| 1266 | hostname, pathname,
|
---|
| 1267 | nfs_strerror(status.nfsv3.fhs_status));
|
---|
| 1268 | goto fail;
|
---|
| 1269 | }
|
---|
| 1270 | my_fhandle = &status.nfsv3.mountres3_u.mountinfo.fhandle;
|
---|
| 1271 | memset(data.old_root.data, 0, NFS_FHSIZE);
|
---|
| 1272 | memset(&data.root, 0, sizeof(data.root));
|
---|
| 1273 | data.root.size = my_fhandle->fhandle3_len;
|
---|
| 1274 | memcpy(data.root.data,
|
---|
| 1275 | (char *) my_fhandle->fhandle3_val,
|
---|
| 1276 | my_fhandle->fhandle3_len);
|
---|
| 1277 |
|
---|
| 1278 | data.flags |= NFS_MOUNT_VER3;
|
---|
| 1279 | }
|
---|
| 1280 |
|
---|
| 1281 | /* create nfs socket for kernel */
|
---|
| 1282 |
|
---|
| 1283 | if (tcp) {
|
---|
| 1284 | if (nfs_mount_version < 3) {
|
---|
| 1285 | bb_error_msg("NFS over TCP is not supported");
|
---|
| 1286 | goto fail;
|
---|
| 1287 | }
|
---|
| 1288 | fsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
|
---|
| 1289 | } else
|
---|
| 1290 | fsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
---|
| 1291 | if (fsock < 0) {
|
---|
| 1292 | bb_perror_msg("nfs socket");
|
---|
| 1293 | goto fail;
|
---|
| 1294 | }
|
---|
| 1295 | if (bindresvport(fsock, 0) < 0) {
|
---|
| 1296 | bb_perror_msg("nfs bindresvport");
|
---|
| 1297 | goto fail;
|
---|
| 1298 | }
|
---|
| 1299 | if (port == 0) {
|
---|
| 1300 | server_addr.sin_port = PMAPPORT;
|
---|
| 1301 | port = pmap_getport(&server_addr, nfsprog, nfsvers,
|
---|
| 1302 | tcp ? IPPROTO_TCP : IPPROTO_UDP);
|
---|
| 1303 | if (port == 0)
|
---|
| 1304 | port = NFS_PORT;
|
---|
| 1305 | }
|
---|
| 1306 | server_addr.sin_port = htons(port);
|
---|
| 1307 |
|
---|
| 1308 | /* prepare data structure for kernel */
|
---|
| 1309 |
|
---|
| 1310 | data.fd = fsock;
|
---|
| 1311 | memcpy((char *) &data.addr, (char *) &server_addr, sizeof(data.addr));
|
---|
| 1312 | strncpy(data.hostname, hostname, sizeof(data.hostname));
|
---|
| 1313 |
|
---|
| 1314 | /* clean up */
|
---|
| 1315 |
|
---|
| 1316 | auth_destroy(mclient->cl_auth);
|
---|
| 1317 | clnt_destroy(mclient);
|
---|
| 1318 | close(msock);
|
---|
| 1319 |
|
---|
| 1320 | if (bg) {
|
---|
| 1321 | /* We must wait until mount directory is available */
|
---|
| 1322 | struct stat statbuf;
|
---|
| 1323 | int delay = 1;
|
---|
| 1324 | while (stat(mp->mnt_dir, &statbuf) == -1) {
|
---|
| 1325 | if (!daemonized) {
|
---|
| 1326 | daemonized = daemonize();
|
---|
| 1327 | if (daemonized <= 0) { /* parent or error */
|
---|
| 1328 | retval = -daemonized;
|
---|
| 1329 | goto ret;
|
---|
| 1330 | }
|
---|
| 1331 | }
|
---|
| 1332 | sleep(delay); /* 1, 2, 4, 8, 16, 30, ... */
|
---|
| 1333 | delay *= 2;
|
---|
| 1334 | if (delay > 30)
|
---|
| 1335 | delay = 30;
|
---|
| 1336 | }
|
---|
| 1337 | }
|
---|
| 1338 |
|
---|
| 1339 | do_mount: /* perform actual mount */
|
---|
| 1340 |
|
---|
| 1341 | mp->mnt_type = (char*)"nfs";
|
---|
| 1342 | retval = mount_it_now(mp, vfsflags, (char*)&data);
|
---|
| 1343 | goto ret;
|
---|
| 1344 |
|
---|
| 1345 | fail: /* abort */
|
---|
| 1346 |
|
---|
| 1347 | if (msock != -1) {
|
---|
| 1348 | if (mclient) {
|
---|
| 1349 | auth_destroy(mclient->cl_auth);
|
---|
| 1350 | clnt_destroy(mclient);
|
---|
| 1351 | }
|
---|
| 1352 | close(msock);
|
---|
| 1353 | }
|
---|
| 1354 | if (fsock != -1)
|
---|
| 1355 | close(fsock);
|
---|
| 1356 |
|
---|
| 1357 | ret:
|
---|
| 1358 | free(hostname);
|
---|
| 1359 | free(mounthost);
|
---|
| 1360 | free(filteropts);
|
---|
| 1361 | return retval;
|
---|
| 1362 | }
|
---|
| 1363 |
|
---|
| 1364 | #else /* !ENABLE_FEATURE_MOUNT_NFS */
|
---|
| 1365 |
|
---|
| 1366 | /* Never called. Call should be optimized out. */
|
---|
| 1367 | int nfsmount(struct mntent *mp, int vfsflags, char *filteropts);
|
---|
| 1368 |
|
---|
| 1369 | #endif /* !ENABLE_FEATURE_MOUNT_NFS */
|
---|
| 1370 |
|
---|
| 1371 | // Mount one directory. Handles CIFS, NFS, loopback, autobind, and filesystem
|
---|
| 1372 | // type detection. Returns 0 for success, nonzero for failure.
|
---|
| 1373 | // NB: mp->xxx fields may be trashed on exit
|
---|
[821] | 1374 | static int singlemount(struct mntent *mp, int ignore_busy)
|
---|
| 1375 | {
|
---|
| 1376 | int rc = -1, vfsflags;
|
---|
| 1377 | char *loopFile = 0, *filteropts = 0;
|
---|
| 1378 | llist_t *fl = 0;
|
---|
| 1379 | struct stat st;
|
---|
| 1380 |
|
---|
| 1381 | vfsflags = parse_mount_options(mp->mnt_opts, &filteropts);
|
---|
| 1382 |
|
---|
| 1383 | // Treat fstype "auto" as unspecified.
|
---|
| 1384 |
|
---|
[1770] | 1385 | if (mp->mnt_type && strcmp(mp->mnt_type,"auto") == 0)
|
---|
| 1386 | mp->mnt_type = 0;
|
---|
[821] | 1387 |
|
---|
[1770] | 1388 | // Might this be an CIFS filesystem?
|
---|
[821] | 1389 |
|
---|
[1770] | 1390 | if (ENABLE_FEATURE_MOUNT_CIFS
|
---|
| 1391 | && (!mp->mnt_type || strcmp(mp->mnt_type,"cifs") == 0)
|
---|
| 1392 | && (mp->mnt_fsname[0]=='/' || mp->mnt_fsname[0]=='\\')
|
---|
| 1393 | && mp->mnt_fsname[0]==mp->mnt_fsname[1]
|
---|
| 1394 | ) {
|
---|
| 1395 | len_and_sockaddr *lsa;
|
---|
| 1396 | char *ip, *dotted;
|
---|
| 1397 | char *s;
|
---|
| 1398 |
|
---|
| 1399 | rc = 1;
|
---|
| 1400 | // Replace '/' with '\' and verify that unc points to "//server/share".
|
---|
| 1401 |
|
---|
| 1402 | for (s = mp->mnt_fsname; *s; ++s)
|
---|
| 1403 | if (*s == '/') *s = '\\';
|
---|
| 1404 |
|
---|
| 1405 | // get server IP
|
---|
| 1406 |
|
---|
| 1407 | s = strrchr(mp->mnt_fsname, '\\');
|
---|
| 1408 | if (s <= mp->mnt_fsname+1) goto report_error;
|
---|
| 1409 | *s = '\0';
|
---|
| 1410 | lsa = host2sockaddr(mp->mnt_fsname+2, 0);
|
---|
| 1411 | *s = '\\';
|
---|
| 1412 | if (!lsa) goto report_error;
|
---|
| 1413 |
|
---|
| 1414 | // insert ip=... option into string flags.
|
---|
| 1415 |
|
---|
| 1416 | dotted = xmalloc_sockaddr2dotted_noport(&lsa->sa);
|
---|
| 1417 | ip = xasprintf("ip=%s", dotted);
|
---|
| 1418 | parse_mount_options(ip, &filteropts);
|
---|
| 1419 |
|
---|
| 1420 | // compose new unc '\\server-ip\share'
|
---|
| 1421 | // (s => slash after hostname)
|
---|
| 1422 |
|
---|
| 1423 | mp->mnt_fsname = xasprintf("\\\\%s%s", dotted, s);
|
---|
| 1424 |
|
---|
| 1425 | // lock is required
|
---|
| 1426 | vfsflags |= MS_MANDLOCK;
|
---|
| 1427 |
|
---|
| 1428 | mp->mnt_type = (char*)"cifs";
|
---|
| 1429 | rc = mount_it_now(mp, vfsflags, filteropts);
|
---|
| 1430 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 1431 | free(mp->mnt_fsname);
|
---|
| 1432 | free(ip);
|
---|
| 1433 | free(dotted);
|
---|
| 1434 | free(lsa);
|
---|
[821] | 1435 | }
|
---|
[1770] | 1436 | goto report_error;
|
---|
[821] | 1437 | }
|
---|
| 1438 |
|
---|
[1770] | 1439 | // Might this be an NFS filesystem?
|
---|
| 1440 |
|
---|
| 1441 | if (ENABLE_FEATURE_MOUNT_NFS
|
---|
| 1442 | && (!mp->mnt_type || !strcmp(mp->mnt_type, "nfs"))
|
---|
| 1443 | && strchr(mp->mnt_fsname, ':') != NULL
|
---|
| 1444 | ) {
|
---|
| 1445 | rc = nfsmount(mp, vfsflags, filteropts);
|
---|
| 1446 | goto report_error;
|
---|
| 1447 | }
|
---|
| 1448 |
|
---|
[821] | 1449 | // Look at the file. (Not found isn't a failure for remount, or for
|
---|
| 1450 | // a synthetic filesystem like proc or sysfs.)
|
---|
[1770] | 1451 | // (We use stat, not lstat, in order to allow
|
---|
| 1452 | // mount symlink_to_file_or_blkdev dir)
|
---|
[821] | 1453 |
|
---|
[1770] | 1454 | if (!stat(mp->mnt_fsname, &st)
|
---|
| 1455 | && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))
|
---|
| 1456 | ) {
|
---|
[821] | 1457 | // Do we need to allocate a loopback device for it?
|
---|
| 1458 |
|
---|
| 1459 | if (ENABLE_FEATURE_MOUNT_LOOP && S_ISREG(st.st_mode)) {
|
---|
| 1460 | loopFile = bb_simplify_path(mp->mnt_fsname);
|
---|
[1770] | 1461 | mp->mnt_fsname = NULL; /* will receive malloced loop dev name */
|
---|
| 1462 | if (set_loop(&(mp->mnt_fsname), loopFile, 0) < 0) {
|
---|
| 1463 | if (errno == EPERM || errno == EACCES)
|
---|
| 1464 | bb_error_msg(bb_msg_perm_denied_are_you_root);
|
---|
| 1465 | else
|
---|
| 1466 | bb_perror_msg("cannot setup loop device");
|
---|
| 1467 | return errno;
|
---|
[821] | 1468 | }
|
---|
| 1469 |
|
---|
| 1470 | // Autodetect bind mounts
|
---|
| 1471 |
|
---|
[1770] | 1472 | } else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
|
---|
| 1473 | vfsflags |= MS_BIND;
|
---|
[821] | 1474 | }
|
---|
| 1475 |
|
---|
| 1476 | /* If we know the fstype (or don't need to), jump straight
|
---|
| 1477 | * to the actual mount. */
|
---|
| 1478 |
|
---|
| 1479 | if (mp->mnt_type || (vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE)))
|
---|
| 1480 | rc = mount_it_now(mp, vfsflags, filteropts);
|
---|
| 1481 | else {
|
---|
[1770] | 1482 | // Loop through filesystem types until mount succeeds
|
---|
| 1483 | // or we run out
|
---|
[821] | 1484 |
|
---|
| 1485 | /* Initialize list of block backed filesystems. This has to be
|
---|
| 1486 | * done here so that during "mount -a", mounts after /proc shows up
|
---|
| 1487 | * can autodetect. */
|
---|
| 1488 |
|
---|
| 1489 | if (!fslist) {
|
---|
| 1490 | fslist = get_block_backed_filesystems();
|
---|
| 1491 | if (ENABLE_FEATURE_CLEAN_UP && fslist)
|
---|
| 1492 | atexit(delete_block_backed_filesystems);
|
---|
| 1493 | }
|
---|
| 1494 |
|
---|
| 1495 | for (fl = fslist; fl; fl = fl->link) {
|
---|
| 1496 | mp->mnt_type = fl->data;
|
---|
[1770] | 1497 | rc = mount_it_now(mp, vfsflags, filteropts);
|
---|
| 1498 | if (!rc) break;
|
---|
[821] | 1499 | }
|
---|
| 1500 | }
|
---|
| 1501 |
|
---|
| 1502 | // If mount failed, clean up loop file (if any).
|
---|
| 1503 |
|
---|
| 1504 | if (ENABLE_FEATURE_MOUNT_LOOP && rc && loopFile) {
|
---|
| 1505 | del_loop(mp->mnt_fsname);
|
---|
| 1506 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 1507 | free(loopFile);
|
---|
| 1508 | free(mp->mnt_fsname);
|
---|
| 1509 | }
|
---|
| 1510 | }
|
---|
[1770] | 1511 |
|
---|
| 1512 | report_error:
|
---|
| 1513 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 1514 | free(filteropts);
|
---|
| 1515 |
|
---|
| 1516 | if (rc && errno == EBUSY && ignore_busy)
|
---|
| 1517 | rc = 0;
|
---|
[821] | 1518 | if (rc < 0)
|
---|
[1770] | 1519 | bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
|
---|
[821] | 1520 |
|
---|
| 1521 | return rc;
|
---|
| 1522 | }
|
---|
| 1523 |
|
---|
| 1524 | // Parse options, if necessary parse fstab/mtab, and call singlemount for
|
---|
| 1525 | // each directory to be mounted.
|
---|
| 1526 |
|
---|
[1770] | 1527 | static const char must_be_root[] ALIGN1 = "you must be root";
|
---|
| 1528 |
|
---|
| 1529 | int mount_main(int argc, char **argv);
|
---|
[821] | 1530 | int mount_main(int argc, char **argv)
|
---|
| 1531 | {
|
---|
[1770] | 1532 | enum { OPT_ALL = 0x10 };
|
---|
| 1533 |
|
---|
| 1534 | char *cmdopts = xstrdup(""), *fstype=0, *storage_path=0;
|
---|
| 1535 | char *opt_o;
|
---|
| 1536 | const char *fstabname;
|
---|
[821] | 1537 | FILE *fstab;
|
---|
[1770] | 1538 | int i, j, rc = 0;
|
---|
| 1539 | unsigned opt;
|
---|
[821] | 1540 | struct mntent mtpair[2], *mtcur = mtpair;
|
---|
[1770] | 1541 | SKIP_DESKTOP(const int nonroot = 0;)
|
---|
| 1542 | USE_DESKTOP( int nonroot = (getuid() != 0);)
|
---|
[821] | 1543 |
|
---|
| 1544 | /* parse long options, like --bind and --move. Note that -o option
|
---|
| 1545 | * and --option are synonymous. Yes, this means --remount,rw works. */
|
---|
| 1546 |
|
---|
[1770] | 1547 | for (i = j = 0; i < argc; i++) {
|
---|
[821] | 1548 | if (argv[i][0] == '-' && argv[i][1] == '-') {
|
---|
[1770] | 1549 | append_mount_options(&cmdopts, argv[i]+2);
|
---|
| 1550 | } else argv[j++] = argv[i];
|
---|
[821] | 1551 | }
|
---|
[1770] | 1552 | argv[j] = 0;
|
---|
| 1553 | argc = j;
|
---|
[821] | 1554 |
|
---|
| 1555 | // Parse remaining options
|
---|
| 1556 |
|
---|
[1770] | 1557 | opt = getopt32(argv, "o:t:rwanfvs", &opt_o, &fstype);
|
---|
| 1558 | if (opt & 0x1) append_mount_options(&cmdopts, opt_o); // -o
|
---|
| 1559 | //if (opt & 0x2) // -t
|
---|
| 1560 | if (opt & 0x4) append_mount_options(&cmdopts, "ro"); // -r
|
---|
| 1561 | if (opt & 0x8) append_mount_options(&cmdopts, "rw"); // -w
|
---|
| 1562 | //if (opt & 0x10) // -a
|
---|
| 1563 | if (opt & 0x20) USE_FEATURE_MTAB_SUPPORT(useMtab = 0); // -n
|
---|
| 1564 | if (opt & 0x40) USE_FEATURE_MTAB_SUPPORT(fakeIt = 1); // -f
|
---|
| 1565 | //if (opt & 0x80) // -v: verbose (ignore)
|
---|
| 1566 | //if (opt & 0x100) // -s: sloppy (ignore)
|
---|
| 1567 | argv += optind;
|
---|
| 1568 | argc -= optind;
|
---|
[821] | 1569 |
|
---|
| 1570 | // Three or more non-option arguments? Die with a usage message.
|
---|
| 1571 |
|
---|
[1770] | 1572 | if (argc > 2) bb_show_usage();
|
---|
[821] | 1573 |
|
---|
| 1574 | // If we have no arguments, show currently mounted filesystems
|
---|
| 1575 |
|
---|
[1770] | 1576 | if (!argc) {
|
---|
| 1577 | if (!(opt & OPT_ALL)) {
|
---|
[821] | 1578 | FILE *mountTable = setmntent(bb_path_mtab_file, "r");
|
---|
| 1579 |
|
---|
[1770] | 1580 | if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file);
|
---|
[821] | 1581 |
|
---|
[1770] | 1582 | while (getmntent_r(mountTable, mtpair, bb_common_bufsiz1,
|
---|
[821] | 1583 | sizeof(bb_common_bufsiz1)))
|
---|
| 1584 | {
|
---|
[1770] | 1585 | // Don't show rootfs. FIXME: why??
|
---|
| 1586 | // util-linux 2.12a happily shows rootfs...
|
---|
| 1587 | //if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
|
---|
[821] | 1588 |
|
---|
| 1589 | if (!fstype || !strcmp(mtpair->mnt_type, fstype))
|
---|
| 1590 | printf("%s on %s type %s (%s)\n", mtpair->mnt_fsname,
|
---|
| 1591 | mtpair->mnt_dir, mtpair->mnt_type,
|
---|
| 1592 | mtpair->mnt_opts);
|
---|
| 1593 | }
|
---|
| 1594 | if (ENABLE_FEATURE_CLEAN_UP) endmntent(mountTable);
|
---|
| 1595 | return EXIT_SUCCESS;
|
---|
| 1596 | }
|
---|
[1770] | 1597 | } else storage_path = bb_simplify_path(argv[0]);
|
---|
[821] | 1598 |
|
---|
| 1599 | // When we have two arguments, the second is the directory and we can
|
---|
| 1600 | // skip looking at fstab entirely. We can always abspath() the directory
|
---|
| 1601 | // argument when we get it.
|
---|
| 1602 |
|
---|
[1770] | 1603 | if (argc == 2) {
|
---|
| 1604 | if (nonroot)
|
---|
| 1605 | bb_error_msg_and_die(must_be_root);
|
---|
| 1606 | mtpair->mnt_fsname = argv[0];
|
---|
| 1607 | mtpair->mnt_dir = argv[1];
|
---|
[821] | 1608 | mtpair->mnt_type = fstype;
|
---|
| 1609 | mtpair->mnt_opts = cmdopts;
|
---|
| 1610 | rc = singlemount(mtpair, 0);
|
---|
| 1611 | goto clean_up;
|
---|
| 1612 | }
|
---|
| 1613 |
|
---|
[1770] | 1614 | i = parse_mount_options(cmdopts, 0);
|
---|
| 1615 | if (nonroot && (i & ~MS_SILENT)) // Non-root users cannot specify flags
|
---|
| 1616 | bb_error_msg_and_die(must_be_root);
|
---|
[821] | 1617 |
|
---|
[1770] | 1618 | // If we have a shared subtree flag, don't worry about fstab or mtab.
|
---|
[821] | 1619 |
|
---|
[1770] | 1620 | if (ENABLE_FEATURE_MOUNT_FLAGS
|
---|
| 1621 | && (i & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
|
---|
| 1622 | ) {
|
---|
| 1623 | rc = mount("", argv[0], "", i, "");
|
---|
| 1624 | if (rc) bb_perror_msg_and_die("%s", argv[0]);
|
---|
| 1625 | goto clean_up;
|
---|
| 1626 | }
|
---|
| 1627 |
|
---|
[821] | 1628 | // Open either fstab or mtab
|
---|
| 1629 |
|
---|
[1770] | 1630 | fstabname = "/etc/fstab";
|
---|
| 1631 | if (i & MS_REMOUNT) {
|
---|
| 1632 | fstabname = bb_path_mtab_file;
|
---|
| 1633 | }
|
---|
| 1634 | fstab = setmntent(fstabname, "r");
|
---|
| 1635 | if (!fstab)
|
---|
| 1636 | bb_perror_msg_and_die("cannot read %s", fstabname);
|
---|
[821] | 1637 |
|
---|
| 1638 | // Loop through entries until we find what we're looking for.
|
---|
| 1639 |
|
---|
[1770] | 1640 | memset(mtpair, 0, sizeof(mtpair));
|
---|
[821] | 1641 | for (;;) {
|
---|
[1770] | 1642 | struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair);
|
---|
[821] | 1643 |
|
---|
| 1644 | // Get next fstab entry
|
---|
| 1645 |
|
---|
| 1646 | if (!getmntent_r(fstab, mtcur, bb_common_bufsiz1
|
---|
| 1647 | + (mtcur==mtpair ? sizeof(bb_common_bufsiz1)/2 : 0),
|
---|
| 1648 | sizeof(bb_common_bufsiz1)/2))
|
---|
| 1649 | {
|
---|
| 1650 | // Were we looking for something specific?
|
---|
| 1651 |
|
---|
[1770] | 1652 | if (argc) {
|
---|
[821] | 1653 |
|
---|
| 1654 | // If we didn't find anything, complain.
|
---|
| 1655 |
|
---|
| 1656 | if (!mtnext->mnt_fsname)
|
---|
[1770] | 1657 | bb_error_msg_and_die("can't find %s in %s",
|
---|
| 1658 | argv[0], fstabname);
|
---|
[821] | 1659 |
|
---|
[1770] | 1660 | mtcur = mtnext;
|
---|
| 1661 | if (nonroot) {
|
---|
| 1662 | // fstab must have "users" or "user"
|
---|
| 1663 | if (!(parse_mount_options(mtcur->mnt_opts, 0) & MOUNT_USERS))
|
---|
| 1664 | bb_error_msg_and_die(must_be_root);
|
---|
| 1665 | }
|
---|
| 1666 |
|
---|
[821] | 1667 | // Mount the last thing we found.
|
---|
| 1668 |
|
---|
[1770] | 1669 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
---|
| 1670 | append_mount_options(&(mtcur->mnt_opts), cmdopts);
|
---|
[821] | 1671 | rc = singlemount(mtcur, 0);
|
---|
| 1672 | free(mtcur->mnt_opts);
|
---|
| 1673 | }
|
---|
| 1674 | goto clean_up;
|
---|
| 1675 | }
|
---|
| 1676 |
|
---|
| 1677 | /* If we're trying to mount something specific and this isn't it,
|
---|
| 1678 | * skip it. Note we must match both the exact text in fstab (ala
|
---|
| 1679 | * "proc") or a full path from root */
|
---|
| 1680 |
|
---|
[1770] | 1681 | if (argc) {
|
---|
[821] | 1682 |
|
---|
| 1683 | // Is this what we're looking for?
|
---|
| 1684 |
|
---|
[1770] | 1685 | if (strcmp(argv[0], mtcur->mnt_fsname) &&
|
---|
| 1686 | strcmp(storage_path, mtcur->mnt_fsname) &&
|
---|
| 1687 | strcmp(argv[0], mtcur->mnt_dir) &&
|
---|
| 1688 | strcmp(storage_path, mtcur->mnt_dir)) continue;
|
---|
[821] | 1689 |
|
---|
| 1690 | // Remember this entry. Something later may have overmounted
|
---|
| 1691 | // it, and we want the _last_ match.
|
---|
| 1692 |
|
---|
| 1693 | mtcur = mtnext;
|
---|
| 1694 |
|
---|
| 1695 | // If we're mounting all.
|
---|
| 1696 |
|
---|
| 1697 | } else {
|
---|
| 1698 | // Do we need to match a filesystem type?
|
---|
[1770] | 1699 | if (fstype && match_fstype(mtcur, fstype)) continue;
|
---|
[821] | 1700 |
|
---|
| 1701 | // Skip noauto and swap anyway.
|
---|
| 1702 |
|
---|
[1770] | 1703 | if (parse_mount_options(mtcur->mnt_opts, 0)
|
---|
[821] | 1704 | & (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
|
---|
| 1705 |
|
---|
[1770] | 1706 | // No, mount -a won't mount anything,
|
---|
| 1707 | // even user mounts, for mere humans.
|
---|
| 1708 |
|
---|
| 1709 | if (nonroot)
|
---|
| 1710 | bb_error_msg_and_die(must_be_root);
|
---|
| 1711 |
|
---|
[821] | 1712 | // Mount this thing.
|
---|
| 1713 |
|
---|
[1770] | 1714 | // NFS mounts want this to be xrealloc-able
|
---|
| 1715 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
---|
[821] | 1716 | if (singlemount(mtcur, 1)) {
|
---|
| 1717 | /* Count number of failed mounts */
|
---|
| 1718 | rc++;
|
---|
| 1719 | }
|
---|
[1770] | 1720 | free(mtcur->mnt_opts);
|
---|
[821] | 1721 | }
|
---|
| 1722 | }
|
---|
| 1723 | if (ENABLE_FEATURE_CLEAN_UP) endmntent(fstab);
|
---|
| 1724 |
|
---|
| 1725 | clean_up:
|
---|
| 1726 |
|
---|
| 1727 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 1728 | free(storage_path);
|
---|
| 1729 | free(cmdopts);
|
---|
| 1730 | }
|
---|
| 1731 |
|
---|
| 1732 | return rc;
|
---|
| 1733 | }
|
---|