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/* vi: set sw=4 ts=4: */
/*
* Mini cp implementation for busybox
*
* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
* SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
*
* Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
*/
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Size reduction.
*/
#include "libbb.h"
#include "libcoreutils/coreutils.h"
/* This is a NOEXEC applet. Be very careful! */
int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int cp_main(int argc, char **argv)
{
struct stat source_stat;
struct stat dest_stat;
const char *last;
const char *dest;
int s_flags;
int d_flags;
int flags;
int status = 0;
enum {
OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1),
OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)),
OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1),
OPT_H = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2),
};
// Need at least two arguments
// Soft- and hardlinking doesn't mix
// -P and -d are the same (-P is POSIX, -d is GNU)
// -r and -R are the same
// -R (and therefore -r) turns on -d (coreutils does this)
// -a = -pdR
opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR:HL";
// -v (--verbose) is ignored
flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPHv");
/* Options of cp from GNU coreutils 6.10:
* -a, --archive
* -f, --force
* -i, --interactive
* -l, --link
* -L, --dereference
* -P, --no-dereference
* -R, -r, --recursive
* -s, --symbolic-link
* -v, --verbose
* -H follow command-line symbolic links in SOURCE
* -d same as --no-dereference --preserve=links
* -p same as --preserve=mode,ownership,timestamps
* -c same as --preserve=context
* NOT SUPPORTED IN BBOX:
* long options are not supported (even those above).
* --backup[=CONTROL]
* make a backup of each existing destination file
* -b like --backup but does not accept an argument
* --copy-contents
* copy contents of special files when recursive
* --preserve[=ATTR_LIST]
* preserve attributes (default: mode,ownership,timestamps),
* if possible additional attributes: security context,links,all
* --no-preserve=ATTR_LIST
* --parents
* use full source file name under DIRECTORY
* --remove-destination
* remove each existing destination file before attempting to open
* --sparse=WHEN
* control creation of sparse files
* --strip-trailing-slashes
* remove any trailing slashes from each SOURCE argument
* -S, --suffix=SUFFIX
* override the usual backup suffix
* -t, --target-directory=DIRECTORY
* copy all SOURCE arguments into DIRECTORY
* -T, --no-target-directory
* treat DEST as a normal file
* -u, --update
* copy only when the SOURCE file is newer than the destination
* file or when the destination file is missing
* -x, --one-file-system
* stay on this file system
* -Z, --context=CONTEXT
* (SELinux) set SELinux security context of copy to CONTEXT
*/
argc -= optind;
argv += optind;
flags ^= FILEUTILS_DEREFERENCE; /* the sense of this flag was reversed */
/* coreutils 6.9 compat:
* by default, "cp" derefs symlinks (creates regular dest files),
* but "cp -R" does not. We switch off deref if -r or -R (see above).
* However, "cp -RL" must still deref symlinks: */
if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
flags |= FILEUTILS_DEREFERENCE;
/* The behavior of -H is *almost* like -L, but not quite, so let's
* just ignore it too for fun. TODO.
if (flags & OPT_H) ... // deref command-line params only
*/
#if ENABLE_SELINUX
if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
selinux_or_die();
}
#endif
last = argv[argc - 1];
/* If there are only two arguments and... */
if (argc == 2) {
s_flags = cp_mv_stat2(*argv, &source_stat,
(flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
if (s_flags < 0)
return EXIT_FAILURE;
d_flags = cp_mv_stat(last, &dest_stat);
if (d_flags < 0)
return EXIT_FAILURE;
/* ...if neither is a directory or... */
if ( !((s_flags | d_flags) & 2) ||
/* ...recursing, the 1st is a directory, and the 2nd doesn't exist... */
((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
) {
/* ...do a simple copy. */
dest = last;
goto DO_COPY; /* NB: argc==2 -> *++argv==last */
}
}
while (1) {
dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
DO_COPY:
if (copy_file(*argv, dest, flags) < 0) {
status = 1;
}
if (*++argv == last) {
/* possibly leaking dest... */
break;
}
free((void*)dest);
}
/* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
return status;
}
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