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

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    Revision 532 - (hide annotations) (download)
    Sat Sep 1 22:45:15 2007 UTC (16 years, 9 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 niro 532 /* 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     }