busybox/coreutils/install.c

/* vi: set sw=4 ts=4: */
/*
 * Copyright (C) 2003 by Glenn McGrath
 * SELinux support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "libbb.h"
#include "libcoreutils/coreutils.h"

#if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
static const char install_longopts[] ALIGN1 =
	"directory\0"           No_argument       "d"
	"preserve-timestamps\0" No_argument       "p"
	"strip\0"               No_argument       "s"
	"group\0"               Required_argument "g"
	"mode\0"                Required_argument "m"
	"owner\0"               Required_argument "o"
/* autofs build insists of using -b --suffix=.orig */
/* TODO? (short option for --suffix is -S) */
#if ENABLE_SELINUX
	"context\0"             Required_argument "Z"
	"preserve_context\0"    No_argument       "\xff"
	"preserve-context\0"    No_argument       "\xff"
#endif
	;
#endif


#if ENABLE_SELINUX
static void setdefaultfilecon(const char *path)
{
	struct stat s;
	security_context_t scontext = NULL;

	if (!is_selinux_enabled()) {
		return;
	}
	if (lstat(path, &s) != 0) {
		return;
	}

	if (matchpathcon(path, s.st_mode, &scontext) < 0) {
		goto out;
	}
	if (strcmp(scontext, "<<none>>") == 0) {
		goto out;
	}

	if (lsetfilecon(path, scontext) < 0) {
		if (errno != ENOTSUP) {
			bb_perror_msg("warning: failed to change context"
					" of %s to %s", path, scontext);
		}
	}

 out:
	freecon(scontext);
}

#endif

int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int install_main(int argc, char **argv)
{
	struct stat statbuf;
	mode_t mode;
	uid_t uid;
	gid_t gid;
	char *arg, *last;
	const char *gid_str;
	const char *uid_str;
	const char *mode_str;
	int copy_flags = FILEUTILS_DEREFERENCE | FILEUTILS_FORCE;
	int opts;
	int min_args = 1;
	int ret = EXIT_SUCCESS;
	int isdir = 0;
#if ENABLE_SELINUX
	security_context_t scontext;
	bool use_default_selinux_context = 1;
#endif
	enum {
		OPT_c             = 1 << 0,
		OPT_v             = 1 << 1,
		OPT_b             = 1 << 2,
		OPT_MKDIR_LEADING = 1 << 3,
		OPT_DIRECTORY     = 1 << 4,
		OPT_PRESERVE_TIME = 1 << 5,
		OPT_STRIP         = 1 << 6,
		OPT_GROUP         = 1 << 7,
		OPT_MODE          = 1 << 8,
		OPT_OWNER         = 1 << 9,
#if ENABLE_SELINUX
		OPT_SET_SECURITY_CONTEXT = 1 << 10,
		OPT_PRESERVE_SECURITY_CONTEXT = 1 << 11,
#endif
	};

#if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
	applet_long_options = install_longopts;
#endif
	opt_complementary = "s--d:d--s" USE_SELINUX(":Z--\xff:\xff--Z");
	/* -c exists for backwards compatibility, it's needed */
	/* -v is ignored ("print name of each created directory") */
	/* -b is ignored ("make a backup of each existing destination file") */
	opts = getopt32(argv, "cvb" "Ddpsg:m:o:" USE_SELINUX("Z:"),
			&gid_str, &mode_str, &uid_str USE_SELINUX(, &scontext));
	argc -= optind;
	argv += optind;

#if ENABLE_SELINUX
	if (opts & (OPT_PRESERVE_SECURITY_CONTEXT|OPT_SET_SECURITY_CONTEXT)) {
		selinux_or_die();
		use_default_selinux_context = 0;
		if (opts & OPT_PRESERVE_SECURITY_CONTEXT) {
			copy_flags |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
		}
		if (opts & OPT_SET_SECURITY_CONTEXT) {
			setfscreatecon_or_die(scontext);
			copy_flags |= FILEUTILS_SET_SECURITY_CONTEXT;
		}
	}
#endif

	/* preserve access and modification time, this is GNU behaviour,
	 * BSD only preserves modification time */
	if (opts & OPT_PRESERVE_TIME) {
		copy_flags |= FILEUTILS_PRESERVE_STATUS;
	}
	mode = 0666;
	if (opts & OPT_MODE)
		bb_parse_mode(mode_str, &mode);
	uid = (opts & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
	gid = (opts & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();

	last = argv[argc - 1];
	if (!(opts & OPT_DIRECTORY)) {
		argv[argc - 1] = NULL;
		min_args++;

		/* coreutils install resolves link in this case, don't use lstat */
		isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
	}

	if (argc < min_args)
		bb_show_usage();

	while ((arg = *argv++) != NULL) {
		char *dest = last;
		if (opts & OPT_DIRECTORY) {
			dest = arg;
			/* GNU coreutils 6.9 does not set uid:gid
			 * on intermediate created directories
			 * (only on last one) */
			if (bb_make_directory(dest, 0755, FILEUTILS_RECUR)) {
				ret = EXIT_FAILURE;
				goto next;
			}
		} else {
			if (opts & OPT_MKDIR_LEADING) {
				char *ddir = xstrdup(dest);
				bb_make_directory(dirname(ddir), 0755, FILEUTILS_RECUR);
				/* errors are not checked. copy_file
				 * will fail if dir is not created. */
				free(ddir);
			}
			if (isdir)
				dest = concat_path_file(last, basename(arg));
			if (copy_file(arg, dest, copy_flags)) {
				/* copy is not made */
				ret = EXIT_FAILURE;
				goto next;
			}
		}

		/* Set the file mode */
		if ((opts & OPT_MODE) && chmod(dest, mode) == -1) {
			bb_perror_msg("can't change %s of %s", "permissions", dest);
			ret = EXIT_FAILURE;
		}
#if ENABLE_SELINUX
		if (use_default_selinux_context)
			setdefaultfilecon(dest);
#endif
		/* Set the user and group id */
		if ((opts & (OPT_OWNER|OPT_GROUP))
		 && lchown(dest, uid, gid) == -1
		) {
			bb_perror_msg("can't change %s of %s", "ownership", dest);
			ret = EXIT_FAILURE;
		}
		if (opts & OPT_STRIP) {
			char *args[3];
			args[0] = (char*)"strip";
			args[1] = dest;
			args[2] = NULL;
			if (spawn_and_wait(args)) {
				bb_perror_msg("strip");
				ret = EXIT_FAILURE;
			}
		}
 next:
		if (ENABLE_FEATURE_CLEAN_UP && isdir)
			free(dest);
	}

	return ret;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Copyright (C) 2003 by Glenn McGrath
4	* SELinux support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
5	*
6	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
7	*/
8
9	#include "libbb.h"
10	#include "libcoreutils/coreutils.h"
11
12	#if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
13	static const char install_longopts[] ALIGN1 =
14	"directory\0" No_argument "d"
15	"preserve-timestamps\0" No_argument "p"
16	"strip\0" No_argument "s"
17	"group\0" Required_argument "g"
18	"mode\0" Required_argument "m"
19	"owner\0" Required_argument "o"
20	/* autofs build insists of using -b --suffix=.orig */
21	/* TODO? (short option for --suffix is -S) */
22	#if ENABLE_SELINUX
23	"context\0" Required_argument "Z"
24	"preserve_context\0" No_argument "\xff"
25	"preserve-context\0" No_argument "\xff"
26	#endif
27	;
28	#endif
29
30
31	#if ENABLE_SELINUX
32	static void setdefaultfilecon(const char *path)
33	{
34	struct stat s;
35	security_context_t scontext = NULL;
36
37	if (!is_selinux_enabled()) {
38	return;
39	}
40	if (lstat(path, &s) != 0) {
41	return;
42	}
43
44	if (matchpathcon(path, s.st_mode, &scontext) < 0) {
45	goto out;
46	}
47	if (strcmp(scontext, "<<none>>") == 0) {
48	goto out;
49	}
50
51	if (lsetfilecon(path, scontext) < 0) {
52	if (errno != ENOTSUP) {
53	bb_perror_msg("warning: failed to change context"
54	" of %s to %s", path, scontext);
55	}
56	}
57
58	out:
59	freecon(scontext);
60	}
61
62	#endif
63
64	int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
65	int install_main(int argc, char **argv)
66	{
67	struct stat statbuf;
68	mode_t mode;
69	uid_t uid;
70	gid_t gid;
71	char arg, last;
72	const char *gid_str;
73	const char *uid_str;
74	const char *mode_str;
75	int copy_flags = FILEUTILS_DEREFERENCE \| FILEUTILS_FORCE;
76	int opts;
77	int min_args = 1;
78	int ret = EXIT_SUCCESS;
79	int isdir = 0;
80	#if ENABLE_SELINUX
81	security_context_t scontext;
82	bool use_default_selinux_context = 1;
83	#endif
84	enum {
85	OPT_c = 1 << 0,
86	OPT_v = 1 << 1,
87	OPT_b = 1 << 2,
88	OPT_MKDIR_LEADING = 1 << 3,
89	OPT_DIRECTORY = 1 << 4,
90	OPT_PRESERVE_TIME = 1 << 5,
91	OPT_STRIP = 1 << 6,
92	OPT_GROUP = 1 << 7,
93	OPT_MODE = 1 << 8,
94	OPT_OWNER = 1 << 9,
95	#if ENABLE_SELINUX
96	OPT_SET_SECURITY_CONTEXT = 1 << 10,
97	OPT_PRESERVE_SECURITY_CONTEXT = 1 << 11,
98	#endif
99	};
100
101	#if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
102	applet_long_options = install_longopts;
103	#endif
104	opt_complementary = "s--d:d--s" USE_SELINUX(":Z--\xff:\xff--Z");
105	/* -c exists for backwards compatibility, it's needed */
106	/* -v is ignored ("print name of each created directory") */
107	/* -b is ignored ("make a backup of each existing destination file") */
108	opts = getopt32(argv, "cvb" "Ddpsg:m:o:" USE_SELINUX("Z:"),
109	&gid_str, &mode_str, &uid_str USE_SELINUX(, &scontext));
110	argc -= optind;
111	argv += optind;
112
113	#if ENABLE_SELINUX
114	if (opts & (OPT_PRESERVE_SECURITY_CONTEXT\|OPT_SET_SECURITY_CONTEXT)) {
115	selinux_or_die();
116	use_default_selinux_context = 0;
117	if (opts & OPT_PRESERVE_SECURITY_CONTEXT) {
118	copy_flags \|= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
119	}
120	if (opts & OPT_SET_SECURITY_CONTEXT) {
121	setfscreatecon_or_die(scontext);
122	copy_flags \|= FILEUTILS_SET_SECURITY_CONTEXT;
123	}
124	}
125	#endif
126
127	/* preserve access and modification time, this is GNU behaviour,
128	* BSD only preserves modification time */
129	if (opts & OPT_PRESERVE_TIME) {
130	copy_flags \|= FILEUTILS_PRESERVE_STATUS;
131	}
132	mode = 0666;
133	if (opts & OPT_MODE)
134	bb_parse_mode(mode_str, &mode);
135	uid = (opts & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
136	gid = (opts & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
137
138	last = argv[argc - 1];
139	if (!(opts & OPT_DIRECTORY)) {
140	argv[argc - 1] = NULL;
141	min_args++;
142
143	/* coreutils install resolves link in this case, don't use lstat */
144	isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
145	}
146
147	if (argc < min_args)
148	bb_show_usage();
149
150	while ((arg = *argv++) != NULL) {
151	char *dest = last;
152	if (opts & OPT_DIRECTORY) {
153	dest = arg;
154	/* GNU coreutils 6.9 does not set uid:gid
155	* on intermediate created directories
156	* (only on last one) */
157	if (bb_make_directory(dest, 0755, FILEUTILS_RECUR)) {
158	ret = EXIT_FAILURE;
159	goto next;
160	}
161	} else {
162	if (opts & OPT_MKDIR_LEADING) {
163	char *ddir = xstrdup(dest);
164	bb_make_directory(dirname(ddir), 0755, FILEUTILS_RECUR);
165	/* errors are not checked. copy_file
166	* will fail if dir is not created. */
167	free(ddir);
168	}
169	if (isdir)
170	dest = concat_path_file(last, basename(arg));
171	if (copy_file(arg, dest, copy_flags)) {
172	/* copy is not made */
173	ret = EXIT_FAILURE;
174	goto next;
175	}
176	}
177
178	/* Set the file mode */
179	if ((opts & OPT_MODE) && chmod(dest, mode) == -1) {
180	bb_perror_msg("can't change %s of %s", "permissions", dest);
181	ret = EXIT_FAILURE;
182	}
183	#if ENABLE_SELINUX
184	if (use_default_selinux_context)
185	setdefaultfilecon(dest);
186	#endif
187	/* Set the user and group id */
188	if ((opts & (OPT_OWNER\|OPT_GROUP))
189	&& lchown(dest, uid, gid) == -1
190	) {
191	bb_perror_msg("can't change %s of %s", "ownership", dest);
192	ret = EXIT_FAILURE;
193	}
194	if (opts & OPT_STRIP) {
195	char *args[3];
196	args[0] = (char*)"strip";
197	args[1] = dest;
198	args[2] = NULL;
199	if (spawn_and_wait(args)) {
200	bb_perror_msg("strip");
201	ret = EXIT_FAILURE;
202	}
203	}
204	next:
205	if (ENABLE_FEATURE_CLEAN_UP && isdir)
206	free(dest);
207	}
208
209	return ret;
210	}