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108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini cp implementation for busybox
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*
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* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
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* SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
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*
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* Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
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*/
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* Size reduction.
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*/
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#include "libbb.h"
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#include "libcoreutils/coreutils.h"
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/* This is a NOEXEC applet. Be very careful! */
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int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int cp_main(int argc, char **argv)
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{
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struct stat source_stat;
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struct stat dest_stat;
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const char *last;
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const char *dest;
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int s_flags;
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int d_flags;
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int flags;
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int status = 0;
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enum {
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OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1),
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OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)),
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OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1),
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OPT_H = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2),
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};
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// Need at least two arguments
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// Soft- and hardlinking doesn't mix
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// -P and -d are the same (-P is POSIX, -d is GNU)
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// -r and -R are the same
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// -R (and therefore -r) turns on -d (coreutils does this)
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// -a = -pdR
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opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR:HL";
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flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPH");
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argc -= optind;
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argv += optind;
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flags ^= FILEUTILS_DEREFERENCE; /* the sense of this flag was reversed */
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/* coreutils 6.9 compat:
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* by default, "cp" derefs symlinks (creates regular dest files),
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* but "cp -R" does not. We switch off deref if -r or -R (see above).
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* However, "cp -RL" must still deref symlinks: */
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if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
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flags |= FILEUTILS_DEREFERENCE;
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/* The behavior of -H is *almost* like -L, but not quite, so let's
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* just ignore it too for fun. TODO.
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if (flags & OPT_H) ... // deref command-line params only
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*/
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#if ENABLE_SELINUX
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if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
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selinux_or_die();
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}
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#endif
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last = argv[argc - 1];
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/* If there are only two arguments and... */
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if (argc == 2) {
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s_flags = cp_mv_stat2(*argv, &source_stat,
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(flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
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if (s_flags < 0)
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return EXIT_FAILURE;
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d_flags = cp_mv_stat(last, &dest_stat);
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if (d_flags < 0)
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return EXIT_FAILURE;
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/* ...if neither is a directory or... */
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if ( !((s_flags | d_flags) & 2) ||
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/* ...recursing, the 1st is a directory, and the 2nd doesn't exist... */
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((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
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) {
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/* ...do a simple copy. */
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dest = last;
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goto DO_COPY; /* NB: argc==2 -> *++argv==last */
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}
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}
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while (1) {
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dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
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DO_COPY:
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if (copy_file(*argv, dest, flags) < 0) {
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status = 1;
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}
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if (*++argv == last) {
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/* possibly leaking dest... */
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break;
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}
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free((void*)dest);
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}
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/* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
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return status;
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}
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