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    Contents of /trunk/mkinitrd-magellan/busybox/coreutils/chown.c

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    Revision 532 - (show annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 8 months ago) by niro
    File MIME type: text/plain
    File size: 2944 byte(s) 
    -import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
    1 /* vi: set sw=4 ts=4: */
    2 /*
    3 * Mini chown implementation for busybox
    4 *
    5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
    6 *
    7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    8 */
    9
    10 /* BB_AUDIT SUSv3 defects - unsupported options -H, -L, and -P. */
    11 /* BB_AUDIT GNU defects - unsupported long options. */
    12 /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
    13
    14 #include "busybox.h"
    15
    16 static struct bb_uidgid_t ugid = { -1, -1 };
    17
    18 static int (*chown_func)(const char *, uid_t, gid_t) = chown;
    19
    20 #define OPT_RECURSE (option_mask32 & 1)
    21 #define OPT_NODEREF (option_mask32 & 2)
    22 #define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 4) SKIP_DESKTOP(0))
    23 #define OPT_CHANGED (USE_DESKTOP(option_mask32 & 8) SKIP_DESKTOP(0))
    24 #define OPT_QUIET (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0))
    25 #define OPT_STR ("Rh" USE_DESKTOP("vcf"))
    26
    27 /* TODO:
    28 * -H if a command line argument is a symbolic link to a directory, traverse it
    29 * -L traverse every symbolic link to a directory encountered
    30 * -P do not traverse any symbolic links (default)
    31 */
    32
    33 static int fileAction(const char *fileName, struct stat *statbuf,
    34 void ATTRIBUTE_UNUSED *junk, int depth)
    35 {
    36 // TODO: -H/-L/-P
    37 // if (depth ... && S_ISLNK(statbuf->st_mode)) ....
    38
    39 if (!chown_func(fileName,
    40 (ugid.uid == (uid_t)-1) ? statbuf->st_uid : ugid.uid,
    41 (ugid.gid == (gid_t)-1) ? statbuf->st_gid : ugid.gid)
    42 ) {
    43 if (OPT_VERBOSE
    44 || (OPT_CHANGED && (statbuf->st_uid != ugid.uid || statbuf->st_gid != ugid.gid))
    45 ) {
    46 printf("changed ownership of '%s' to %u:%u\n",
    47 fileName, ugid.uid, ugid.gid);
    48 }
    49 return TRUE;
    50 }
    51 if (!OPT_QUIET)
    52 bb_perror_msg("%s", fileName); /* A filename can have % in it... */
    53 return FALSE;
    54 }
    55
    56 int chown_main(int argc, char **argv)
    57 {
    58 char *groupName;
    59 int retval = EXIT_SUCCESS;
    60
    61 opt_complementary = "-2";
    62 getopt32(argc, argv, OPT_STR);
    63 argv += optind;
    64
    65 if (OPT_NODEREF) chown_func = lchown;
    66
    67 /* First, check if there is a group name here */
    68 groupName = strchr(*argv, '.'); /* deprecated? */
    69 if (!groupName)
    70 groupName = strchr(*argv, ':');
    71 else
    72 *groupName = ':'; /* replace '.' with ':' */
    73
    74 /* First, try parsing "user[:[group]]" */
    75 if (!groupName) { /* "user" */
    76 ugid.uid = get_ug_id(*argv, xuname2uid);
    77 } else if (groupName == *argv) { /* ":group" */
    78 ugid.gid = get_ug_id(groupName + 1, xgroup2gid);
    79 } else {
    80 if (!groupName[1]) /* "user:" */
    81 *groupName = '\0';
    82 if (!get_uidgid(&ugid, *argv, 1))
    83 bb_error_msg_and_die("unknown user/group %s", *argv);
    84 }
    85
    86 /* Ok, ready to do the deed now */
    87 argv++;
    88 do {
    89 if (!recursive_action(*argv,
    90 OPT_RECURSE, // recurse
    91 FALSE, // follow links: TODO: -H/-L/-P
    92 FALSE, // depth first
    93 fileAction, // file action
    94 fileAction, // dir action
    95 NULL, // user data
    96 0) // depth
    97 ) {
    98 retval = EXIT_FAILURE;
    99 }
    100 } while (*++argv);
    101
    102 return retval;
    103 }