[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini chown implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 8 | */
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| 9 |
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| 10 | /* BB_AUDIT SUSv3 defects - none? */
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| 11 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
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| 12 |
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| 13 | #include "libbb.h"
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| 14 |
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| 15 | /* This is a NOEXEC applet. Be very careful! */
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| 16 |
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| 17 |
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| 18 | #define OPT_STR ("Rh" IF_DESKTOP("vcfLHP"))
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| 19 | #define BIT_RECURSE 1
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| 20 | #define OPT_RECURSE (opt & 1)
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| 21 | #define OPT_NODEREF (opt & 2)
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| 22 | #define OPT_VERBOSE (IF_DESKTOP(opt & 0x04) IF_NOT_DESKTOP(0))
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| 23 | #define OPT_CHANGED (IF_DESKTOP(opt & 0x08) IF_NOT_DESKTOP(0))
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| 24 | #define OPT_QUIET (IF_DESKTOP(opt & 0x10) IF_NOT_DESKTOP(0))
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| 25 | /* POSIX options
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| 26 | * -L traverse every symbolic link to a directory encountered
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| 27 | * -H if a command line argument is a symbolic link to a directory, traverse it
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| 28 | * -P do not traverse any symbolic links (default)
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| 29 | * We do not conform to the following:
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| 30 | * "Specifying more than one of -H, -L, and -P is not an error.
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| 31 | * The last option specified shall determine the behavior of the utility." */
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| 32 | /* -L */
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| 33 | #define BIT_TRAVERSE 0x20
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| 34 | #define OPT_TRAVERSE (IF_DESKTOP(opt & BIT_TRAVERSE) IF_NOT_DESKTOP(0))
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| 35 | /* -H or -L */
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| 36 | #define BIT_TRAVERSE_TOP (0x20|0x40)
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| 37 | #define OPT_TRAVERSE_TOP (IF_DESKTOP(opt & BIT_TRAVERSE_TOP) IF_NOT_DESKTOP(0))
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| 38 |
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| 39 | #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS
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| 40 | static const char chown_longopts[] ALIGN1 =
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| 41 | "recursive\0" No_argument "R"
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| 42 | "dereference\0" No_argument "\xff"
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| 43 | "no-dereference\0" No_argument "h"
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| 44 | # if ENABLE_DESKTOP
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| 45 | "changes\0" No_argument "c"
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| 46 | "silent\0" No_argument "f"
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| 47 | "quiet\0" No_argument "f"
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| 48 | "verbose\0" No_argument "v"
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| 49 | # endif
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| 50 | ;
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| 51 | #endif
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| 52 |
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| 53 | typedef int (*chown_fptr)(const char *, uid_t, gid_t);
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| 54 |
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| 55 | struct param_t {
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| 56 | struct bb_uidgid_t ugid;
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| 57 | chown_fptr chown_func;
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| 58 | };
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| 59 |
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| 60 | static int FAST_FUNC fileAction(const char *fileName, struct stat *statbuf,
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| 61 | void *vparam, int depth UNUSED_PARAM)
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| 62 | {
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| 63 | #define param (*(struct param_t*)vparam)
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| 64 | #define opt option_mask32
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| 65 | uid_t u = (param.ugid.uid == (uid_t)-1L) ? statbuf->st_uid : param.ugid.uid;
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| 66 | gid_t g = (param.ugid.gid == (gid_t)-1L) ? statbuf->st_gid : param.ugid.gid;
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| 67 |
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| 68 | if (param.chown_func(fileName, u, g) == 0) {
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| 69 | if (OPT_VERBOSE
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| 70 | || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g))
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| 71 | ) {
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| 72 | printf("changed ownership of '%s' to %u:%u\n",
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| 73 | fileName, (unsigned)u, (unsigned)g);
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| 74 | }
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| 75 | return TRUE;
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| 76 | }
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| 77 | if (!OPT_QUIET)
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| 78 | bb_simple_perror_msg(fileName);
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| 79 | return FALSE;
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| 80 | #undef opt
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| 81 | #undef param
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| 82 | }
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| 83 |
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| 84 | int chown_main(int argc UNUSED_PARAM, char **argv)
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| 85 | {
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| 86 | int retval = EXIT_SUCCESS;
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| 87 | int opt, flags;
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| 88 | struct param_t param;
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| 89 |
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| 90 | /* Just -1 might not work: uid_t may be unsigned long */
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| 91 | param.ugid.uid = -1L;
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| 92 | param.ugid.gid = -1L;
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| 93 |
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| 94 | #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS
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| 95 | applet_long_options = chown_longopts;
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| 96 | #endif
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| 97 | opt_complementary = "-2";
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| 98 | opt = getopt32(argv, OPT_STR);
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| 99 | argv += optind;
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| 100 |
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| 101 | /* This matches coreutils behavior (almost - see below) */
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| 102 | param.chown_func = chown;
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| 103 | if (OPT_NODEREF
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| 104 | /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
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| 105 | IF_DESKTOP( || (opt & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
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| 106 | ) {
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| 107 | param.chown_func = lchown;
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| 108 | }
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| 109 |
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| 110 | flags = ACTION_DEPTHFIRST; /* match coreutils order */
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| 111 | if (OPT_RECURSE)
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| 112 | flags |= ACTION_RECURSE;
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| 113 | if (OPT_TRAVERSE_TOP)
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| 114 | flags |= ACTION_FOLLOWLINKS_L0; /* -H/-L: follow links on depth 0 */
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| 115 | if (OPT_TRAVERSE)
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| 116 | flags |= ACTION_FOLLOWLINKS; /* follow links if -L */
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| 117 |
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| 118 | parse_chown_usergroup_or_die(¶m.ugid, argv[0]);
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| 119 |
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| 120 | /* Ok, ready to do the deed now */
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| 121 | while (*++argv) {
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| 122 | if (!recursive_action(*argv,
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| 123 | flags, /* flags */
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| 124 | fileAction, /* file action */
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| 125 | fileAction, /* dir action */
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| 126 | ¶m, /* user data */
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| 127 | 0) /* depth */
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| 128 | ) {
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| 129 | retval = EXIT_FAILURE;
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| 130 | }
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| 131 | }
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| 132 |
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| 133 | return retval;
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| 134 | }
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| 135 |
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| 136 | /*
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| 137 | Testcase. Run in empty directory.
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| 138 |
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| 139 | #!/bin/sh
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| 140 | t1="/tmp/busybox chown"
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| 141 | t2="/usr/bin/chown"
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| 142 | create() {
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| 143 | rm -rf $1; mkdir $1
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| 144 | (
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| 145 | cd $1 || exit 1
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| 146 | mkdir dir dir2
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| 147 | >up
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| 148 | >file
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| 149 | >dir/file
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| 150 | >dir2/file
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| 151 | ln -s dir linkdir
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| 152 | ln -s file linkfile
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| 153 | ln -s ../up dir/linkup
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| 154 | ln -s ../dir2 dir/linkupdir2
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| 155 | )
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| 156 | chown -R 0:0 $1
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| 157 | }
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| 158 | tst() {
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| 159 | create test1
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| 160 | create test2
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| 161 | echo "[$1]" >>test1.out
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| 162 | echo "[$1]" >>test2.out
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| 163 | (cd test1; $t1 $1) >>test1.out 2>&1
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| 164 | (cd test2; $t2 $1) >>test2.out 2>&1
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| 165 | (cd test1; ls -lnR) >out1
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| 166 | (cd test2; ls -lnR) >out2
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| 167 | echo "chown $1" >out.diff
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| 168 | if ! diff -u out1 out2 >>out.diff; then exit 1; fi
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| 169 | rm out.diff
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| 170 | }
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| 171 | tst_for_each() {
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| 172 | tst "$1 1:1 file"
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| 173 | tst "$1 1:1 dir"
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| 174 | tst "$1 1:1 linkdir"
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| 175 | tst "$1 1:1 linkfile"
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| 176 | }
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| 177 | echo "If script produced 'out.diff' file, then at least one testcase failed"
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| 178 | >test1.out
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| 179 | >test2.out
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| 180 | # These match coreutils 6.8:
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| 181 | tst_for_each "-v"
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| 182 | tst_for_each "-vR"
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| 183 | tst_for_each "-vRP"
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| 184 | tst_for_each "-vRL"
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| 185 | tst_for_each "-vRH"
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| 186 | tst_for_each "-vh"
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| 187 | tst_for_each "-vhR"
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| 188 | tst_for_each "-vhRP"
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| 189 | tst_for_each "-vhRL"
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| 190 | tst_for_each "-vhRH"
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| 191 | # Fix `name' in coreutils output
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| 192 | sed 's/`/'"'"'/g' -i test2.out
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| 193 | # Compare us with coreutils output
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| 194 | diff -u test1.out test2.out
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| 195 |
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| 196 | */
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