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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21 | #include "libbb.h"
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22 | #include <mntent.h>
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23 |
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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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45 | #endif
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46 |
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47 |
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48 | // Not real flags, but we want to be able to check for this.
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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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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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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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71 |
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72 | USE_FEATURE_MOUNT_LOOP(
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73 | {"loop", 0},
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74 | )
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75 |
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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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85 |
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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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101 |
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102 | // action flags
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103 |
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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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121 | };
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122 |
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123 |
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124 | /* Append mount options to string */
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125 | static void append_mount_options(char **oldopts, const char *newopts)
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126 | {
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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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150 | } else {
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151 | if (ENABLE_FEATURE_CLEAN_UP) free(*oldopts);
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152 | *oldopts = xstrdup(newopts);
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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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157 | * Also return list of unrecognized options if unrecognized!=NULL */
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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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170 | for (i = 0; i < ARRAY_SIZE(mount_options); i++) {
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171 | if (!strcasecmp(mount_options[i].name, options)) {
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172 | long fl = mount_options[i].flags;
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173 | if (fl < 0) flags &= fl;
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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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179 | if (unrecognized && i == ARRAY_SIZE(mount_options)) {
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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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190 | if (comma) {
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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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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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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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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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215 |
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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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221 |
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222 | llist_add_to_end(&list, xstrdup(fs));
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223 | free(buf);
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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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243 | static int useMtab = 1;
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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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251 | // NB: mp->xxx fields may be trashed on exit
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252 | static int mount_it_now(struct mntent *mp, int vfsflags, char *filteropts)
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253 | {
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254 | int rc = 0;
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255 |
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256 | if (fakeIt) goto mtab;
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257 |
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258 | // Mount, with fallback to read-only if necessary.
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259 |
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260 | for (;;) {
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261 | rc = mount(mp->mnt_fsname, mp->mnt_dir, mp->mnt_type,
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262 | vfsflags, filteropts);
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263 | if (!rc || (vfsflags&MS_RDONLY) || (errno!=EACCES && errno!=EROFS))
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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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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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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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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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287 |
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288 | // Add vfs string flags
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289 |
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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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293 |
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294 | // Remove trailing / (if any) from directory we mounted on
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295 |
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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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298 |
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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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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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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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317 | }
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318 | ret:
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319 | return rc;
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320 | }
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321 |
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322 | #if ENABLE_FEATURE_MOUNT_NFS
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323 |
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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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345 |
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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;
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414 | };
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415 | typedef struct mountbody mountbody;
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416 |
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417 | typedef struct groupnode *groups;
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418 |
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419 | struct groupnode {
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420 | name gr_name;
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421 | groups gr_next;
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422 | };
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423 | typedef struct groupnode groupnode;
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424 |
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425 | typedef struct exportnode *exports;
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426 |
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427 | struct exportnode {
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428 | dirpath ex_dir;
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429 | groups ex_groups;
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430 | exports ex_next;
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431 | };
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432 | typedef struct exportnode exportnode;
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433 |
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434 | struct ppathcnf {
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435 | int pc_link_max;
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436 | short pc_max_canon;
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437 | short pc_max_input;
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438 | short pc_name_max;
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439 | short pc_path_max;
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440 | short pc_pipe_buf;
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441 | uint8_t pc_vdisable;
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442 | char pc_xxx;
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443 | short pc_mask[2];
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444 | };
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445 | typedef struct ppathcnf ppathcnf;
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446 |
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447 | #define MOUNTPROG 100005
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448 | #define MOUNTVERS 1
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449 |
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450 | #define MOUNTPROC_NULL 0
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451 | #define MOUNTPROC_MNT 1
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452 | #define MOUNTPROC_DUMP 2
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453 | #define MOUNTPROC_UMNT 3
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454 | #define MOUNTPROC_UMNTALL 4
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455 | #define MOUNTPROC_EXPORT 5
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456 | #define MOUNTPROC_EXPORTALL 6
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457 |
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458 | #define MOUNTVERS_POSIX 2
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459 |
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460 | #define MOUNTPROC_PATHCONF 7
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---|
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
|
---|
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 |
|
---|
1385 | if (mp->mnt_type && strcmp(mp->mnt_type,"auto") == 0)
|
---|
1386 | mp->mnt_type = 0;
|
---|
1387 |
|
---|
1388 | // Might this be an CIFS filesystem?
|
---|
1389 |
|
---|
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);
|
---|
1435 | }
|
---|
1436 | goto report_error;
|
---|
1437 | }
|
---|
1438 |
|
---|
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 |
|
---|
1449 | // Look at the file. (Not found isn't a failure for remount, or for
|
---|
1450 | // a synthetic filesystem like proc or sysfs.)
|
---|
1451 | // (We use stat, not lstat, in order to allow
|
---|
1452 | // mount symlink_to_file_or_blkdev dir)
|
---|
1453 |
|
---|
1454 | if (!stat(mp->mnt_fsname, &st)
|
---|
1455 | && !(vfsflags & (MS_REMOUNT | MS_BIND | MS_MOVE))
|
---|
1456 | ) {
|
---|
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);
|
---|
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;
|
---|
1468 | }
|
---|
1469 |
|
---|
1470 | // Autodetect bind mounts
|
---|
1471 |
|
---|
1472 | } else if (S_ISDIR(st.st_mode) && !mp->mnt_type)
|
---|
1473 | vfsflags |= MS_BIND;
|
---|
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 {
|
---|
1482 | // Loop through filesystem types until mount succeeds
|
---|
1483 | // or we run out
|
---|
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;
|
---|
1497 | rc = mount_it_now(mp, vfsflags, filteropts);
|
---|
1498 | if (!rc) break;
|
---|
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 | }
|
---|
1511 |
|
---|
1512 | report_error:
|
---|
1513 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
1514 | free(filteropts);
|
---|
1515 |
|
---|
1516 | if (rc && errno == EBUSY && ignore_busy)
|
---|
1517 | rc = 0;
|
---|
1518 | if (rc < 0)
|
---|
1519 | bb_perror_msg("mounting %s on %s failed", mp->mnt_fsname, mp->mnt_dir);
|
---|
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 |
|
---|
1527 | static const char must_be_root[] ALIGN1 = "you must be root";
|
---|
1528 |
|
---|
1529 | int mount_main(int argc, char **argv);
|
---|
1530 | int mount_main(int argc, char **argv)
|
---|
1531 | {
|
---|
1532 | enum { OPT_ALL = 0x10 };
|
---|
1533 |
|
---|
1534 | char *cmdopts = xstrdup(""), *fstype=0, *storage_path=0;
|
---|
1535 | char *opt_o;
|
---|
1536 | const char *fstabname;
|
---|
1537 | FILE *fstab;
|
---|
1538 | int i, j, rc = 0;
|
---|
1539 | unsigned opt;
|
---|
1540 | struct mntent mtpair[2], *mtcur = mtpair;
|
---|
1541 | SKIP_DESKTOP(const int nonroot = 0;)
|
---|
1542 | USE_DESKTOP( int nonroot = (getuid() != 0);)
|
---|
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 |
|
---|
1547 | for (i = j = 0; i < argc; i++) {
|
---|
1548 | if (argv[i][0] == '-' && argv[i][1] == '-') {
|
---|
1549 | append_mount_options(&cmdopts, argv[i]+2);
|
---|
1550 | } else argv[j++] = argv[i];
|
---|
1551 | }
|
---|
1552 | argv[j] = 0;
|
---|
1553 | argc = j;
|
---|
1554 |
|
---|
1555 | // Parse remaining options
|
---|
1556 |
|
---|
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;
|
---|
1569 |
|
---|
1570 | // Three or more non-option arguments? Die with a usage message.
|
---|
1571 |
|
---|
1572 | if (argc > 2) bb_show_usage();
|
---|
1573 |
|
---|
1574 | // If we have no arguments, show currently mounted filesystems
|
---|
1575 |
|
---|
1576 | if (!argc) {
|
---|
1577 | if (!(opt & OPT_ALL)) {
|
---|
1578 | FILE *mountTable = setmntent(bb_path_mtab_file, "r");
|
---|
1579 |
|
---|
1580 | if (!mountTable) bb_error_msg_and_die("no %s", bb_path_mtab_file);
|
---|
1581 |
|
---|
1582 | while (getmntent_r(mountTable, mtpair, bb_common_bufsiz1,
|
---|
1583 | sizeof(bb_common_bufsiz1)))
|
---|
1584 | {
|
---|
1585 | // Don't show rootfs. FIXME: why??
|
---|
1586 | // util-linux 2.12a happily shows rootfs...
|
---|
1587 | //if (!strcmp(mtpair->mnt_fsname, "rootfs")) continue;
|
---|
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 | }
|
---|
1597 | } else storage_path = bb_simplify_path(argv[0]);
|
---|
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 |
|
---|
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];
|
---|
1608 | mtpair->mnt_type = fstype;
|
---|
1609 | mtpair->mnt_opts = cmdopts;
|
---|
1610 | rc = singlemount(mtpair, 0);
|
---|
1611 | goto clean_up;
|
---|
1612 | }
|
---|
1613 |
|
---|
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);
|
---|
1617 |
|
---|
1618 | // If we have a shared subtree flag, don't worry about fstab or mtab.
|
---|
1619 |
|
---|
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 |
|
---|
1628 | // Open either fstab or mtab
|
---|
1629 |
|
---|
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);
|
---|
1637 |
|
---|
1638 | // Loop through entries until we find what we're looking for.
|
---|
1639 |
|
---|
1640 | memset(mtpair, 0, sizeof(mtpair));
|
---|
1641 | for (;;) {
|
---|
1642 | struct mntent *mtnext = (mtcur==mtpair ? mtpair+1 : mtpair);
|
---|
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 |
|
---|
1652 | if (argc) {
|
---|
1653 |
|
---|
1654 | // If we didn't find anything, complain.
|
---|
1655 |
|
---|
1656 | if (!mtnext->mnt_fsname)
|
---|
1657 | bb_error_msg_and_die("can't find %s in %s",
|
---|
1658 | argv[0], fstabname);
|
---|
1659 |
|
---|
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 |
|
---|
1667 | // Mount the last thing we found.
|
---|
1668 |
|
---|
1669 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
---|
1670 | append_mount_options(&(mtcur->mnt_opts), cmdopts);
|
---|
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 |
|
---|
1681 | if (argc) {
|
---|
1682 |
|
---|
1683 | // Is this what we're looking for?
|
---|
1684 |
|
---|
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;
|
---|
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?
|
---|
1699 | if (fstype && match_fstype(mtcur, fstype)) continue;
|
---|
1700 |
|
---|
1701 | // Skip noauto and swap anyway.
|
---|
1702 |
|
---|
1703 | if (parse_mount_options(mtcur->mnt_opts, 0)
|
---|
1704 | & (MOUNT_NOAUTO | MOUNT_SWAP)) continue;
|
---|
1705 |
|
---|
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 |
|
---|
1712 | // Mount this thing.
|
---|
1713 |
|
---|
1714 | // NFS mounts want this to be xrealloc-able
|
---|
1715 | mtcur->mnt_opts = xstrdup(mtcur->mnt_opts);
|
---|
1716 | if (singlemount(mtcur, 1)) {
|
---|
1717 | /* Count number of failed mounts */
|
---|
1718 | rc++;
|
---|
1719 | }
|
---|
1720 | free(mtcur->mnt_opts);
|
---|
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 | }
|
---|