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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 GPLv2 or later, see file LICENSE in this source tree.
*/
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Size reduction.
*/
//config:config CP
//config: bool "cp (10 kb)"
//config: default y
//config: help
//config: cp is used to copy files and directories.
//config:
//config:config FEATURE_CP_LONG_OPTIONS
//config: bool "Enable long options"
//config: default y
//config: depends on CP && LONG_OPTS
//config: help
//config: Enable long options.
//config: Also add support for --parents option.
//config:
//config:config FEATURE_CP_REFLINK
//config: bool "Enable --reflink[=auto]"
//config: default y
//config: depends on FEATURE_CP_LONG_OPTIONS
//applet:IF_CP(APPLET_NOEXEC(cp, cp, BB_DIR_BIN, BB_SUID_DROP, cp))
/* NOEXEC despite cases when it can be a "runner" (cp -r LARGE_DIR NEW_DIR) */
//kbuild:lib-$(CONFIG_CP) += cp.o
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
//usage:#define cp_trivial_usage
//usage: "[-arPLHpfilsTu] SOURCE... DEST"
//usage:#define cp_full_usage "\n\n"
//usage: "Copy SOURCE(s) to DEST\n"
//usage: "\n -a Same as -dpR"
//usage: IF_SELINUX(
//usage: "\n -c Preserve security context"
//usage: )
//usage: "\n -R,-r Recurse"
//usage: "\n -d,-P Preserve symlinks (default if -R)"
//usage: "\n -L Follow all symlinks"
//usage: "\n -H Follow symlinks on command line"
//usage: "\n -p Preserve file attributes if possible"
//usage: "\n -f Overwrite"
//usage: "\n -i Prompt before overwrite"
//usage: "\n -l,-s Create (sym)links"
//usage: "\n -T Treat DEST as a normal file"
//usage: "\n -u Copy only newer files"
#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;
enum {
FILEUTILS_CP_OPTNUM = sizeof(FILEUTILS_CP_OPTSTR)-1,
#if ENABLE_FEATURE_CP_LONG_OPTIONS
/*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTNUM */
OPT_parents = 1 << (FILEUTILS_CP_OPTNUM+1),
OPT_reflink = 1 << (FILEUTILS_CP_OPTNUM+2),
#endif
};
#if ENABLE_FEATURE_CP_LONG_OPTIONS
# if ENABLE_FEATURE_CP_REFLINK
char *reflink = NULL;
# endif
flags = getopt32long(argv, "^"
FILEUTILS_CP_OPTSTR
"\0"
// 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
"-2:l--s:s--l:Pd:rRd:Rd:apdR",
"archive\0" No_argument "a"
"force\0" No_argument "f"
"interactive\0" No_argument "i"
"link\0" No_argument "l"
"dereference\0" No_argument "L"
"no-dereference\0" No_argument "P"
"recursive\0" No_argument "R"
"symbolic-link\0" No_argument "s"
"no-target-directory\0" No_argument "T"
"verbose\0" No_argument "v"
"update\0" No_argument "u"
"remove-destination\0" No_argument "\xff"
"parents\0" No_argument "\xfe"
# if ENABLE_FEATURE_CP_REFLINK
"reflink\0" Optional_argument "\xfd"
, &reflink
# endif
);
# if ENABLE_FEATURE_CP_REFLINK
BUILD_BUG_ON((int)OPT_reflink != (int)FILEUTILS_REFLINK);
if (flags & FILEUTILS_REFLINK) {
if (!reflink)
flags |= FILEUTILS_REFLINK_ALWAYS;
else if (strcmp(reflink, "always") == 0)
flags |= FILEUTILS_REFLINK_ALWAYS;
else if (strcmp(reflink, "auto") != 0)
bb_show_usage();
}
# endif
#else
flags = getopt32(argv, "^"
FILEUTILS_CP_OPTSTR
"\0"
"-2:l--s:s--l:Pd:rRd:Rd:apdR"
);
#endif
/* 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
* -u, --update
* copy only when the SOURCE file is newer than the destination
* file or when the destination file is missing
* --remove-destination
* remove each existing destination file before attempting to open
* --parents
* use full source file name under DIRECTORY
* -T, --no-target-directory
* treat DEST as a normal file
* NOT SUPPORTED IN BBOX:
* --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
* --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
* -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;
/* Reverse this bit. If there is -d, bit is not set: */
flags ^= FILEUTILS_DEREFERENCE;
/* 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;
#if ENABLE_SELINUX
if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
selinux_or_die();
}
#endif
status = EXIT_SUCCESS;
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 (flags & FILEUTILS_NO_TARGET_DIR) { /* -T */
if (!(s_flags & 2) && (d_flags & 2))
/* cp -T NOTDIR DIR */
bb_error_msg_and_die("'%s' is a directory", last);
}
#if ENABLE_FEATURE_CP_LONG_OPTIONS
//bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x",
// flags, FILEUTILS_RMDEST, OPT_parents);
if (flags & OPT_parents) {
if (!(d_flags & 2)) {
bb_simple_error_msg_and_die("with --parents, the destination must be a directory");
}
}
if (flags & FILEUTILS_RMDEST) {
flags |= FILEUTILS_FORCE;
}
#endif
/* ...if neither is a directory... */
if (!((s_flags | d_flags) & 2)
/* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
|| ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
|| (flags & FILEUTILS_NO_TARGET_DIR)
) {
/* Do a simple copy */
dest = last;
goto DO_COPY; /* NB: argc==2 -> *++argv==last */
}
} else if (flags & FILEUTILS_NO_TARGET_DIR) {
bb_simple_error_msg_and_die("too many arguments");
}
while (1) {
#if ENABLE_FEATURE_CP_LONG_OPTIONS
if (flags & OPT_parents) {
char *dest_dup;
char *dest_dir;
dest = concat_path_file(last, *argv);
dest_dup = xstrdup(dest);
dest_dir = dirname(dest_dup);
if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
return EXIT_FAILURE;
}
free(dest_dup);
goto DO_COPY;
}
#endif
dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
DO_COPY:
if (copy_file(*argv, dest, flags) < 0) {
status = EXIT_FAILURE;
}
if (*++argv == last) {
/* possibly leaking dest... */
break;
}
/* don't move up: dest may be == last and not malloced! */
free((void*)dest);
}
/* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
return status;
}
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