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

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    Revision 984 - (hide annotations) (download)
    Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
    File MIME type: text/plain
    File size: 3184 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    1 niro 532 /* vi: set sw=4 ts=4: */
    2     /*
    3     * Mini mv implementation for busybox
    4     *
    5     * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
    6 niro 816 * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
    7 niro 532 *
    8     * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
    9     */
    10    
    11     /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
    12     *
    13     * Size reduction and improved error checking.
    14     */
    15    
    16 niro 816 #include "libbb.h"
    17 niro 532 #include "libcoreutils/coreutils.h"
    18    
    19     #if ENABLE_FEATURE_MV_LONG_OPTIONS
    20 niro 816 static const char mv_longopts[] ALIGN1 =
    21     "interactive\0" No_argument "i"
    22     "force\0" No_argument "f"
    23     ;
    24 niro 532 #endif
    25    
    26     #define OPT_FILEUTILS_FORCE 1
    27     #define OPT_FILEUTILS_INTERACTIVE 2
    28    
    29 niro 816 int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    30 niro 532 int mv_main(int argc, char **argv)
    31     {
    32     struct stat dest_stat;
    33     const char *last;
    34     const char *dest;
    35 niro 816 unsigned flags;
    36 niro 532 int dest_exists;
    37     int status = 0;
    38 niro 816 int copy_flag = 0;
    39 niro 532
    40     #if ENABLE_FEATURE_MV_LONG_OPTIONS
    41 niro 816 applet_long_options = mv_longopts;
    42 niro 532 #endif
    43 niro 816 // Need at least two arguments
    44     // -f unsets -i, -i unsets -f
    45     opt_complementary = "-2:f-i:i-f";
    46     flags = getopt32(argv, "fi");
    47     argc -= optind;
    48     argv += optind;
    49 niro 532 last = argv[argc - 1];
    50    
    51 niro 816 if (argc == 2) {
    52 niro 532 dest_exists = cp_mv_stat(last, &dest_stat);
    53     if (dest_exists < 0) {
    54 niro 816 return EXIT_FAILURE;
    55 niro 532 }
    56    
    57 niro 816 if (!(dest_exists & 2)) { /* last is not a directory */
    58 niro 532 dest = last;
    59     goto DO_MOVE;
    60     }
    61     }
    62    
    63     do {
    64 niro 816 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
    65 niro 532 dest_exists = cp_mv_stat(dest, &dest_stat);
    66     if (dest_exists < 0) {
    67     goto RET_1;
    68     }
    69    
    70 niro 816 DO_MOVE:
    71     if (dest_exists
    72     && !(flags & OPT_FILEUTILS_FORCE)
    73     && ((access(dest, W_OK) < 0 && isatty(0))
    74     || (flags & OPT_FILEUTILS_INTERACTIVE))
    75     ) {
    76 niro 532 if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
    77     goto RET_1; /* Ouch! fprintf failed! */
    78     }
    79     if (!bb_ask_confirmation()) {
    80     goto RET_0;
    81     }
    82     }
    83     if (rename(*argv, dest) < 0) {
    84     struct stat source_stat;
    85     int source_exists;
    86    
    87 niro 816 if (errno != EXDEV
    88     || (source_exists = cp_mv_stat2(*argv, &source_stat, lstat)) < 1
    89     ) {
    90 niro 984 bb_perror_msg("can't rename '%s'", *argv);
    91 niro 532 } else {
    92 niro 816 static const char fmt[] ALIGN1 =
    93 niro 984 "can't overwrite %sdirectory with %sdirectory";
    94 niro 816
    95 niro 532 if (dest_exists) {
    96     if (dest_exists == 3) {
    97     if (source_exists != 3) {
    98     bb_error_msg(fmt, "", "non-");
    99     goto RET_1;
    100     }
    101     } else {
    102     if (source_exists == 3) {
    103     bb_error_msg(fmt, "non-", "");
    104     goto RET_1;
    105     }
    106     }
    107     if (unlink(dest) < 0) {
    108 niro 984 bb_perror_msg("can't remove '%s'", dest);
    109 niro 532 goto RET_1;
    110     }
    111     }
    112 niro 816 /* FILEUTILS_RECUR also prevents nasties like
    113     * "read from device and write contents to dst"
    114     * instead of "create same device node" */
    115     copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
    116     #if ENABLE_SELINUX
    117     copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
    118     #endif
    119     if ((copy_file(*argv, dest, copy_flag) >= 0)
    120     && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
    121     ) {
    122 niro 532 goto RET_0;
    123     }
    124     }
    125 niro 816 RET_1:
    126 niro 532 status = 1;
    127     }
    128 niro 816 RET_0:
    129 niro 532 if (dest != last) {
    130     free((void *) dest);
    131     }
    132     } while (*++argv != last);
    133    
    134     return status;
    135     }