[821] | 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 tarball for details.
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| 8 | */
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| 9 |
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[1765] | 10 | /* BB_AUDIT SUSv3 defects - none? */
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| 11 | /* BB_AUDIT GNU defects - unsupported long options. */
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[821] | 12 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
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| 13 |
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[1765] | 14 | #include "libbb.h"
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[821] | 15 |
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[1765] | 16 | /* This is a NOEXEC applet. Be very careful! */
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[821] | 17 |
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| 18 |
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[1765] | 19 | #define OPT_STR ("Rh" USE_DESKTOP("vcfLHP"))
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| 20 | #define BIT_RECURSE 1
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| 21 | #define OPT_RECURSE (option_mask32 & 1)
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| 22 | #define OPT_NODEREF (option_mask32 & 2)
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| 23 | #define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 0x04) SKIP_DESKTOP(0))
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| 24 | #define OPT_CHANGED (USE_DESKTOP(option_mask32 & 0x08) SKIP_DESKTOP(0))
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| 25 | #define OPT_QUIET (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0))
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| 26 | /* POSIX options
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| 27 | * -L traverse every symbolic link to a directory encountered
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| 28 | * -H if a command line argument is a symbolic link to a directory, traverse it
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| 29 | * -P do not traverse any symbolic links (default)
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| 30 | * We do not conform to the following:
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| 31 | * "Specifying more than one of -H, -L, and -P is not an error.
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| 32 | * The last option specified shall determine the behavior of the utility." */
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| 33 | /* -L */
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| 34 | #define BIT_TRAVERSE 0x20
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| 35 | #define OPT_TRAVERSE (USE_DESKTOP(option_mask32 & BIT_TRAVERSE) SKIP_DESKTOP(0))
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| 36 | /* -H or -L */
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| 37 | #define BIT_TRAVERSE_TOP (0x20|0x40)
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| 38 | #define OPT_TRAVERSE_TOP (USE_DESKTOP(option_mask32 & BIT_TRAVERSE_TOP) SKIP_DESKTOP(0))
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| 39 |
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| 40 | typedef int (*chown_fptr)(const char *, uid_t, gid_t);
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| 41 |
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| 42 | static struct bb_uidgid_t ugid = { -1, -1 };
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| 43 |
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[821] | 44 | static int fileAction(const char *fileName, struct stat *statbuf,
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[1765] | 45 | void *cf, int depth)
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[821] | 46 | {
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[1765] | 47 | uid_t u = (ugid.uid == (uid_t)-1) ? statbuf->st_uid : ugid.uid;
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| 48 | gid_t g = (ugid.gid == (gid_t)-1) ? statbuf->st_gid : ugid.gid;
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| 49 |
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| 50 | if (!((chown_fptr)cf)(fileName, u, g)) {
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| 51 | if (OPT_VERBOSE
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| 52 | || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g))
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| 53 | ) {
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| 54 | printf("changed ownership of '%s' to %u:%u\n",
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| 55 | fileName, (unsigned)u, (unsigned)g);
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| 56 | }
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[821] | 57 | return TRUE;
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| 58 | }
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[1765] | 59 | if (!OPT_QUIET)
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| 60 | bb_perror_msg("%s", fileName); /* A filename can have % in it... */
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[821] | 61 | return FALSE;
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| 62 | }
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| 63 |
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[1765] | 64 | int chown_main(int argc, char **argv);
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[821] | 65 | int chown_main(int argc, char **argv)
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| 66 | {
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[1765] | 67 | int retval = EXIT_SUCCESS;
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[821] | 68 | int flags;
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[1765] | 69 | chown_fptr chown_func;
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[821] | 70 |
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[1765] | 71 | opt_complementary = "-2";
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| 72 | getopt32(argv, OPT_STR);
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| 73 | argv += optind;
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[821] | 74 |
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[1765] | 75 | /* This matches coreutils behavior (almost - see below) */
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| 76 | chown_func = chown;
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| 77 | if (OPT_NODEREF
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| 78 | /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
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| 79 | USE_DESKTOP( || (option_mask32 & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
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| 80 | ) {
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| 81 | chown_func = lchown;
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[821] | 82 | }
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| 83 |
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[1765] | 84 | flags = ACTION_DEPTHFIRST; /* match coreutils order */
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| 85 | if (OPT_RECURSE)
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| 86 | flags |= ACTION_RECURSE;
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| 87 | if (OPT_TRAVERSE_TOP)
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| 88 | flags |= ACTION_FOLLOWLINKS_L0; /* -H/-L: follow links on depth 0 */
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| 89 | if (OPT_TRAVERSE)
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| 90 | flags |= ACTION_FOLLOWLINKS; /* follow links if -L */
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[821] | 91 |
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[1765] | 92 | parse_chown_usergroup_or_die(&ugid, argv[0]);
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[821] | 93 |
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| 94 | /* Ok, ready to do the deed now */
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[1765] | 95 | argv++;
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[821] | 96 | do {
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[1765] | 97 | if (!recursive_action(*argv,
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| 98 | flags, /* flags */
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| 99 | fileAction, /* file action */
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| 100 | fileAction, /* dir action */
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| 101 | chown_func, /* user data */
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| 102 | 0) /* depth */
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| 103 | ) {
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[821] | 104 | retval = EXIT_FAILURE;
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| 105 | }
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| 106 | } while (*++argv);
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| 107 |
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| 108 | return retval;
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| 109 | }
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[1765] | 110 |
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| 111 | /*
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| 112 | Testcase. Run in empty directory.
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| 113 |
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| 114 | #!/bin/sh
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| 115 | t1="/tmp/busybox chown"
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| 116 | t2="/usr/bin/chown"
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| 117 | create() {
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| 118 | rm -rf $1; mkdir $1
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| 119 | (
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| 120 | cd $1 || exit 1
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| 121 | mkdir dir dir2
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| 122 | >up
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| 123 | >file
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| 124 | >dir/file
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| 125 | >dir2/file
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| 126 | ln -s dir linkdir
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| 127 | ln -s file linkfile
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| 128 | ln -s ../up dir/linkup
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| 129 | ln -s ../dir2 dir/linkupdir2
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| 130 | )
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| 131 | chown -R 0:0 $1
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| 132 | }
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| 133 | tst() {
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| 134 | create test1
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| 135 | create test2
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| 136 | echo "[$1]" >>test1.out
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| 137 | echo "[$1]" >>test2.out
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| 138 | (cd test1; $t1 $1) >>test1.out 2>&1
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| 139 | (cd test2; $t2 $1) >>test2.out 2>&1
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| 140 | (cd test1; ls -lnR) >out1
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| 141 | (cd test2; ls -lnR) >out2
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| 142 | echo "chown $1" >out.diff
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| 143 | if ! diff -u out1 out2 >>out.diff; then exit 1; fi
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| 144 | rm out.diff
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| 145 | }
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| 146 | tst_for_each() {
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| 147 | tst "$1 1:1 file"
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| 148 | tst "$1 1:1 dir"
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| 149 | tst "$1 1:1 linkdir"
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| 150 | tst "$1 1:1 linkfile"
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| 151 | }
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| 152 | echo "If script produced 'out.diff' file, then at least one testcase failed"
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| 153 | >test1.out
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| 154 | >test2.out
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| 155 | # These match coreutils 6.8:
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| 156 | tst_for_each "-v"
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| 157 | tst_for_each "-vR"
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| 158 | tst_for_each "-vRP"
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| 159 | tst_for_each "-vRL"
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| 160 | tst_for_each "-vRH"
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| 161 | tst_for_each "-vh"
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| 162 | tst_for_each "-vhR"
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| 163 | tst_for_each "-vhRP"
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| 164 | tst_for_each "-vhRL"
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| 165 | tst_for_each "-vhRH"
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| 166 | # Fix `name' in coreutils output
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| 167 | sed 's/`/'"'"'/g' -i test2.out
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| 168 | # Compare us with coreutils output
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| 169 | diff -u test1.out test2.out
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| 170 |
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| 171 | */
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