a84bbc5425
When the '-t DIR' option is used the loop over the remaining arguments should terminate when a NULL pointer is reached. function old new delta mv_main 585 590 +5 cp_main 492 496 +4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 9/0) Total: 9 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
288 lines
8.6 KiB
C
288 lines
8.6 KiB
C
/* 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 */
|
|
|
|
// 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
|
|
|
|
//usage:#define cp_trivial_usage
|
|
//usage: "[-arPLHpfinlsTu] SOURCE DEST\n"
|
|
//usage: "or: cp [-arPLHpfinlsu] SOURCE... { -t DIRECTORY | DIRECTORY }"
|
|
//usage:#define cp_full_usage "\n\n"
|
|
//usage: "Copy SOURCEs 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 -n Don't overwrite"
|
|
//usage: "\n -l,-s Create (sym)links"
|
|
//usage: "\n -T Refuse to copy if DEST is a directory"
|
|
//usage: "\n -t DIR Copy all SOURCEs into DIR"
|
|
//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 {
|
|
#if ENABLE_FEATURE_CP_LONG_OPTIONS
|
|
/*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTBITS */
|
|
OPT_parents = 1 << (FILEUTILS_CP_OPTBITS+1),
|
|
OPT_reflink = 1 << (FILEUTILS_CP_OPTBITS+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 one argument. (Usually two+, but -t DIR can have only one)
|
|
// 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
|
|
// -i overrides -n and vice versa (last wins)
|
|
"-1:l--s:s--l:Pd:rRd:Rd:apdR:i-n:n-i",
|
|
"archive\0" No_argument "a"
|
|
"force\0" No_argument "f"
|
|
"interactive\0" No_argument "i"
|
|
"no-clobber\0" No_argument "n"
|
|
"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"
|
|
"target-directory\0" Required_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"
|
|
# endif
|
|
, &last
|
|
# if ENABLE_FEATURE_CP_REFLINK
|
|
, &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"
|
|
"-1:l--s:s--l:Pd:rRd:Rd:apdR"
|
|
, &last
|
|
);
|
|
#endif
|
|
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;
|
|
if (!(flags & FILEUTILS_TARGET_DIR)) {
|
|
last = argv[argc - 1];
|
|
if (argc < 2)
|
|
bb_show_usage();
|
|
if (argc != 2) {
|
|
if (flags & FILEUTILS_NO_TARGET_DIR)
|
|
bb_show_usage();
|
|
/* "cp A B C... DIR" - target must be dir */
|
|
} else /* argc == 2 */ {
|
|
/* "cp A B" - only case where target can be not a dir */
|
|
s_flags = cp_mv_stat2(*argv, &source_stat,
|
|
(flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
|
|
if (s_flags < 0) /* error other than ENOENT */
|
|
return EXIT_FAILURE;
|
|
d_flags = cp_mv_stat(last, &dest_stat);
|
|
if (d_flags < 0) /* error other than ENOENT */
|
|
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: last is DIR from "-t DIR" */
|
|
|
|
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 || *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;
|
|
}
|