1/* vi: set sw=4 ts=4: */
2/*
3 * Mini cp implementation for busybox
4 *
5 * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
6 * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
7 *
8 * Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
9 */
10
11/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
12
13/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
14 *
15 * Size reduction.
16 */
17
18#include "libbb.h"
19#include "libcoreutils/coreutils.h"
20
21/* This is a NOEXEC applet. Be very careful! */
22
23
24int cp_main(int argc, char **argv);
25int cp_main(int argc, char **argv)
26{
27	struct stat source_stat;
28	struct stat dest_stat;
29	const char *last;
30	const char *dest;
31	int s_flags;
32	int d_flags;
33	int flags;
34	int status = 0;
35	enum {
36		OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1),
37		OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)),
38		OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1),
39		OPT_H = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2),
40		OPT_L = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3),
41	};
42
43	// Soft- and hardlinking don't mix
44	// -P and -d are the same (-P is POSIX, -d is GNU)
45	// -r and -R are the same
46	// -a = -pdR
47	opt_complementary = "l--s:s--l:Pd:rR:apdR";
48	flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPHL");
49	/* Default behavior of cp is to dereference, so we don't have to do
50	 * anything special when we are given -L.
51	 * The behavior of -H is *almost* like -L, but not quite, so let's
52	 * just ignore it too for fun.
53	if (flags & OPT_L) ...
54	if (flags & OPT_H) ... // deref command-line params only
55	*/
56
57#if ENABLE_SELINUX
58	if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
59		selinux_or_die();
60	}
61#endif
62
63	flags ^= FILEUTILS_DEREFERENCE;		/* The sense of this flag was reversed. */
64
65	if (optind + 2 > argc) {
66		bb_show_usage();
67	}
68
69	last = argv[argc - 1];
70	argv += optind;
71
72	/* If there are only two arguments and...  */
73	if (optind + 2 == argc) {
74		s_flags = cp_mv_stat2(*argv, &source_stat,
75				      (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
76		if (s_flags < 0)
77			return EXIT_FAILURE;
78		d_flags = cp_mv_stat(last, &dest_stat);
79		if (d_flags < 0)
80			return EXIT_FAILURE;
81
82		/* ...if neither is a directory or...  */
83		if ( !((s_flags | d_flags) & 2) ||
84			/* ...recursing, the 1st is a directory, and the 2nd doesn't exist... */
85			((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
86		) {
87			/* ...do a simple copy.  */
88			dest = xstrdup(last);
89			goto DO_COPY; /* Note: optind+2==argc implies argv[1]==last below. */
90		}
91	}
92
93	do {
94		dest = concat_path_file(last, bb_get_last_path_component(*argv));
95 DO_COPY:
96		if (copy_file(*argv, dest, flags) < 0) {
97			status = 1;
98		}
99		free((void*)dest);
100	} while (*++argv != last);
101
102	return status;
103}
104