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

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    Revision 984 - (show 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 /* 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 * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
    7 *
    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 #include "libbb.h"
    17 #include "libcoreutils/coreutils.h"
    18
    19 #if ENABLE_FEATURE_MV_LONG_OPTIONS
    20 static const char mv_longopts[] ALIGN1 =
    21 "interactive\0" No_argument "i"
    22 "force\0" No_argument "f"
    23 ;
    24 #endif
    25
    26 #define OPT_FILEUTILS_FORCE 1
    27 #define OPT_FILEUTILS_INTERACTIVE 2
    28
    29 int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    30 int mv_main(int argc, char **argv)
    31 {
    32 struct stat dest_stat;
    33 const char *last;
    34 const char *dest;
    35 unsigned flags;
    36 int dest_exists;
    37 int status = 0;
    38 int copy_flag = 0;
    39
    40 #if ENABLE_FEATURE_MV_LONG_OPTIONS
    41 applet_long_options = mv_longopts;
    42 #endif
    43 // 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 last = argv[argc - 1];
    50
    51 if (argc == 2) {
    52 dest_exists = cp_mv_stat(last, &dest_stat);
    53 if (dest_exists < 0) {
    54 return EXIT_FAILURE;
    55 }
    56
    57 if (!(dest_exists & 2)) { /* last is not a directory */
    58 dest = last;
    59 goto DO_MOVE;
    60 }
    61 }
    62
    63 do {
    64 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
    65 dest_exists = cp_mv_stat(dest, &dest_stat);
    66 if (dest_exists < 0) {
    67 goto RET_1;
    68 }
    69
    70 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 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 if (errno != EXDEV
    88 || (source_exists = cp_mv_stat2(*argv, &source_stat, lstat)) < 1
    89 ) {
    90 bb_perror_msg("can't rename '%s'", *argv);
    91 } else {
    92 static const char fmt[] ALIGN1 =
    93 "can't overwrite %sdirectory with %sdirectory";
    94
    95 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 bb_perror_msg("can't remove '%s'", dest);
    109 goto RET_1;
    110 }
    111 }
    112 /* 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 goto RET_0;
    123 }
    124 }
    125 RET_1:
    126 status = 1;
    127 }
    128 RET_0:
    129 if (dest != last) {
    130 free((void *) dest);
    131 }
    132 } while (*++argv != last);
    133
    134 return status;
    135 }