[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini cp implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
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[1765] | 6 | * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
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[821] | 7 | *
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[2725] | 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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[821] | 9 | */
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| 10 |
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| 11 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
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| 12 |
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| 13 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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| 14 | *
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| 15 | * Size reduction.
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| 16 | */
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| 17 |
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[3232] | 18 | //usage:#define cp_trivial_usage
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| 19 | //usage: "[OPTIONS] SOURCE... DEST"
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| 20 | //usage:#define cp_full_usage "\n\n"
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| 21 | //usage: "Copy SOURCE(s) to DEST\n"
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| 22 | //usage: "\n -a Same as -dpR"
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| 23 | //usage: IF_SELINUX(
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| 24 | //usage: "\n -c Preserve security context"
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| 25 | //usage: )
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| 26 | //usage: "\n -R,-r Recurse"
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| 27 | //usage: "\n -d,-P Preserve symlinks (default if -R)"
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| 28 | //usage: "\n -L Follow all symlinks"
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| 29 | //usage: "\n -H Follow symlinks on command line"
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| 30 | //usage: "\n -p Preserve file attributes if possible"
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| 31 | //usage: "\n -f Overwrite"
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| 32 | //usage: "\n -i Prompt before overwrite"
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| 33 | //usage: "\n -l,-s Create (sym)links"
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| 34 |
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[1765] | 35 | #include "libbb.h"
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[821] | 36 | #include "libcoreutils/coreutils.h"
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| 37 |
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[1765] | 38 | /* This is a NOEXEC applet. Be very careful! */
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| 39 |
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[2725] | 40 | int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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[821] | 41 | int cp_main(int argc, char **argv)
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| 42 | {
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| 43 | struct stat source_stat;
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| 44 | struct stat dest_stat;
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| 45 | const char *last;
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| 46 | const char *dest;
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| 47 | int s_flags;
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| 48 | int d_flags;
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| 49 | int flags;
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[2725] | 50 | int status;
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[1765] | 51 | enum {
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| 52 | OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1),
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| 53 | OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)),
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| 54 | OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1),
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[2725] | 55 | OPT_v = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2),
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| 56 | #if ENABLE_FEATURE_CP_LONG_OPTIONS
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| 57 | OPT_parents = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3),
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| 58 | #endif
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[1765] | 59 | };
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[821] | 60 |
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[2725] | 61 | // Need at least two arguments
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| 62 | // Soft- and hardlinking doesn't mix
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[1765] | 63 | // -P and -d are the same (-P is POSIX, -d is GNU)
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| 64 | // -r and -R are the same
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[2725] | 65 | // -R (and therefore -r) turns on -d (coreutils does this)
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[1765] | 66 | // -a = -pdR
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[2725] | 67 | opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR";
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| 68 | #if ENABLE_FEATURE_CP_LONG_OPTIONS
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| 69 | applet_long_options =
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| 70 | "archive\0" No_argument "a"
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| 71 | "force\0" No_argument "f"
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| 72 | "interactive\0" No_argument "i"
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| 73 | "link\0" No_argument "l"
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| 74 | "dereference\0" No_argument "L"
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| 75 | "no-dereference\0" No_argument "P"
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| 76 | "recursive\0" No_argument "R"
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| 77 | "symbolic-link\0" No_argument "s"
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| 78 | "verbose\0" No_argument "v"
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| 79 | "parents\0" No_argument "\xff"
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| 80 | ;
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| 81 | #endif
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| 82 | // -v (--verbose) is ignored
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| 83 | flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPv");
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| 84 | /* Options of cp from GNU coreutils 6.10:
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| 85 | * -a, --archive
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| 86 | * -f, --force
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| 87 | * -i, --interactive
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| 88 | * -l, --link
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| 89 | * -L, --dereference
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| 90 | * -P, --no-dereference
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| 91 | * -R, -r, --recursive
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| 92 | * -s, --symbolic-link
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| 93 | * -v, --verbose
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| 94 | * -H follow command-line symbolic links in SOURCE
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| 95 | * -d same as --no-dereference --preserve=links
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| 96 | * -p same as --preserve=mode,ownership,timestamps
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| 97 | * -c same as --preserve=context
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| 98 | * --parents
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| 99 | * use full source file name under DIRECTORY
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| 100 | * NOT SUPPORTED IN BBOX:
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| 101 | * --backup[=CONTROL]
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| 102 | * make a backup of each existing destination file
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| 103 | * -b like --backup but does not accept an argument
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| 104 | * --copy-contents
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| 105 | * copy contents of special files when recursive
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| 106 | * --preserve[=ATTR_LIST]
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| 107 | * preserve attributes (default: mode,ownership,timestamps),
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| 108 | * if possible additional attributes: security context,links,all
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| 109 | * --no-preserve=ATTR_LIST
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| 110 | * --remove-destination
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| 111 | * remove each existing destination file before attempting to open
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| 112 | * --sparse=WHEN
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| 113 | * control creation of sparse files
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| 114 | * --strip-trailing-slashes
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| 115 | * remove any trailing slashes from each SOURCE argument
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| 116 | * -S, --suffix=SUFFIX
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| 117 | * override the usual backup suffix
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| 118 | * -t, --target-directory=DIRECTORY
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| 119 | * copy all SOURCE arguments into DIRECTORY
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| 120 | * -T, --no-target-directory
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| 121 | * treat DEST as a normal file
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| 122 | * -u, --update
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| 123 | * copy only when the SOURCE file is newer than the destination
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| 124 | * file or when the destination file is missing
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| 125 | * -x, --one-file-system
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| 126 | * stay on this file system
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| 127 | * -Z, --context=CONTEXT
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| 128 | * (SELinux) set SELinux security context of copy to CONTEXT
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| 129 | */
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| 130 | argc -= optind;
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| 131 | argv += optind;
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| 132 | /* Reverse this bit. If there is -d, bit is not set: */
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| 133 | flags ^= FILEUTILS_DEREFERENCE;
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| 134 | /* coreutils 6.9 compat:
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| 135 | * by default, "cp" derefs symlinks (creates regular dest files),
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| 136 | * but "cp -R" does not. We switch off deref if -r or -R (see above).
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| 137 | * However, "cp -RL" must still deref symlinks: */
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| 138 | if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
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| 139 | flags |= FILEUTILS_DEREFERENCE;
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[821] | 140 |
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[1765] | 141 | #if ENABLE_SELINUX
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| 142 | if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
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| 143 | selinux_or_die();
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| 144 | }
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| 145 | #endif
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| 146 |
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[2725] | 147 | status = EXIT_SUCCESS;
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[821] | 148 | last = argv[argc - 1];
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| 149 | /* If there are only two arguments and... */
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[2725] | 150 | if (argc == 2) {
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[821] | 151 | s_flags = cp_mv_stat2(*argv, &source_stat,
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[2725] | 152 | (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
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[1765] | 153 | if (s_flags < 0)
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| 154 | return EXIT_FAILURE;
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| 155 | d_flags = cp_mv_stat(last, &dest_stat);
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| 156 | if (d_flags < 0)
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| 157 | return EXIT_FAILURE;
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| 158 |
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[2725] | 159 | #if ENABLE_FEATURE_CP_LONG_OPTIONS
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| 160 | if (flags & OPT_parents) {
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| 161 | if (!(d_flags & 2)) {
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| 162 | bb_error_msg_and_die("with --parents, the destination must be a directory");
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| 163 | }
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| 164 | }
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| 165 | #endif
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| 166 |
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| 167 | /* ...if neither is a directory... */
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| 168 | if (!((s_flags | d_flags) & 2)
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| 169 | /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
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| 170 | || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
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[821] | 171 | ) {
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[2725] | 172 | /* Do a simple copy */
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| 173 | dest = last;
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| 174 | goto DO_COPY; /* NB: argc==2 -> *++argv==last */
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[821] | 175 | }
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| 176 | }
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| 177 |
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[2725] | 178 | while (1) {
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| 179 | #if ENABLE_FEATURE_CP_LONG_OPTIONS
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| 180 | if (flags & OPT_parents) {
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| 181 | char *dest_dup;
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| 182 | char *dest_dir;
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| 183 | dest = concat_path_file(last, *argv);
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| 184 | dest_dup = xstrdup(dest);
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| 185 | dest_dir = dirname(dest_dup);
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| 186 | if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
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| 187 | return EXIT_FAILURE;
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| 188 | }
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| 189 | free(dest_dup);
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| 190 | goto DO_COPY;
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| 191 | }
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| 192 | #endif
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| 193 | dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
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[1765] | 194 | DO_COPY:
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[821] | 195 | if (copy_file(*argv, dest, flags) < 0) {
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[2725] | 196 | status = EXIT_FAILURE;
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[821] | 197 | }
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[2725] | 198 | if (*++argv == last) {
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| 199 | /* possibly leaking dest... */
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| 200 | break;
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| 201 | }
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| 202 | /* don't move up: dest may be == last and not malloced! */
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[1765] | 203 | free((void*)dest);
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[2725] | 204 | }
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[821] | 205 |
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[2725] | 206 | /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
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[1765] | 207 | return status;
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[821] | 208 | }
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