Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	bin/chmod/chmod.c	Lines:	112	154	72.7 %
Date:	2016-12-06	Branches:	82	132	62.1 %


/*	$OpenBSD: chmod.c,v 1.39 2015/12/31 23:38:16 guenther Exp $	*/
/*	$NetBSD: chmod.c,v 1.12 1995/03/21 09:02:09 cgd Exp $	*/

/*
 * Copyright (c) 1989, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/stat.h>

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fts.h>
#include <grp.h>
#include <limits.h>
#include <locale.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

int ischflags, ischown, ischgrp, ischmod;
extern char *__progname;

gid_t a_gid(const char *);
uid_t a_uid(const char *, int);
__dead void usage(void);

int
main(int argc, char *argv[])
{
	FTS *ftsp;
	FTSENT *p;
	void *set;
	unsigned long val;
	int oct;
	mode_t omode;
	int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval, atflags;
	uid_t uid;
	gid_t gid;
	u_int32_t fclear, fset;
	char *ep, *mode, *cp, *flags;

	setlocale(LC_ALL, "");

	if (strlen(__progname) > 2) {
		ischown = __progname[2] == 'o';
		ischgrp = __progname[2] == 'g';
		ischmod = __progname[2] == 'm';
		ischflags = __progname[2] == 'f';
	}

	uid = (uid_t)-1;
	gid = (gid_t)-1;
	Hflag = Lflag = Rflag = fflag = hflag = 0;
	while ((ch = getopt(argc, argv, "HLPRXfghorstuwx")) != -1)
		switch (ch) {
		case 'H':
			Hflag = 1;
			Lflag = 0;
			break;
		case 'L':
			Lflag = 1;
			Hflag = 0;
			break;
		case 'P':
			Hflag = Lflag = 0;
			break;
		case 'R':
			Rflag = 1;
			break;
		case 'f':		/* no longer documented. */
			fflag = 1;
			break;
		case 'h':
			hflag = 1;
			break;
		/*
		 * If this is a symbolic mode argument rather than
		 * an option, we are done with option processing.
		 */
		case 'g': case 'o': case 'r': case 's':
		case 't': case 'u': case 'w': case 'X': case 'x':
			if (!ischmod)
				usage();
			/*
			 * If getopt() moved past the argument, back up.
			 * If the argument contains option letters before
			 * mode letters, setmode() will catch them.
			 */
			if (optind > 1) {
				cp = argv[optind - 1];
				if (cp[strlen(cp) - 1] == ch)
					--optind;
			}
			goto done;
		default:
			usage();
		}
done:
	argv += optind;
	argc -= optind;

	if (argc < 2)
		usage();

	/*
	 * We alter the symlink itself if doing -h or -RP, or
	 * if doing -RH and the symlink wasn't a command line arg.
	 */
	atflags = AT_SYMLINK_NOFOLLOW;

	fts_options = FTS_PHYSICAL;
	if (Rflag) {
		if (hflag)
			errx(1,
		"the -R and -h options may not be specified together.");
		if (Hflag)
			fts_options |= FTS_COMFOLLOW;
		if (Lflag) {
			fts_options &= ~FTS_PHYSICAL;
			fts_options |= FTS_LOGICAL;
			atflags = 0;
		}
	} else if (!hflag)
		atflags = 0;

	if (ischflags) {
		if (pledge("stdio rpath fattr wpath cpath", NULL) == -1)
			err(1, "pledge");

		flags = *argv;
		if (*flags >= '0' && *flags <= '7') {
			errno = 0;
			val = strtoul(flags, &ep, 8);
			if (val > UINT_MAX)
				errno = ERANGE;
			if (errno)
				err(1, "invalid flags: %s", flags);
			if (*ep)
				errx(1, "invalid flags: %s", flags);
			fset = val;
			oct = 1;
		} else {
			if (strtofflags(&flags, &fset, &fclear))
				errx(1, "invalid flag: %s", flags);
			fclear = ~fclear;
			oct = 0;
		}
	} else if (ischmod) {
		mode = *argv;
		if (*mode >= '0' && *mode <= '7') {
			errno = 0;
			val = strtoul(mode, &ep, 8);
			if (val > INT_MAX)
				errno = ERANGE;
			if (errno)
				err(1, "invalid file mode: %s", mode);
			if (*ep)
				errx(1, "invalid file mode: %s", mode);
			omode = val;
			oct = 1;
		} else {
			if ((set = setmode(mode)) == NULL)
				errx(1, "invalid file mode: %s", mode);
			oct = 0;
		}
	} else if (ischown) {
		/* Both UID and GID are given. */
		if ((cp = strchr(*argv, ':')) != NULL) {
			*cp++ = '\0';
			gid = a_gid(cp);
		}
#ifdef SUPPORT_DOT
		/* UID and GID are separated by a dot and UID exists. */
		else if ((cp = strchr(*argv, '.')) != NULL &&
		    (uid = a_uid(*argv, 1)) == (uid_t)-1) {
			*cp++ = '\0';
			gid = a_gid(cp);
		}
#endif
		if (uid == (uid_t)-1)
			uid = a_uid(*argv, 0);
	} else
		gid = a_gid(*argv);

	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
		err(1, NULL);
	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
		switch (p->fts_info) {
		case FTS_D:
			if (!Rflag)
				fts_set(ftsp, p, FTS_SKIP);
			if (ischmod)
				break;
			else
				continue;
		case FTS_DNR:			/* Warn, chmod, continue. */
			warnc(p->fts_errno, "%s", p->fts_path);
			rval = 1;
			break;
		case FTS_DP:			/* Already changed at FTS_D. */
			if (ischmod)
				continue;
			else
				break;
		case FTS_ERR:			/* Warn, continue. */
		case FTS_NS:
			warnc(p->fts_errno, "%s", p->fts_path);
			rval = 1;
			continue;
		case FTS_SL:			/* Ignore. */
		case FTS_SLNONE:
			/*
			 * The only symlinks that end up here are ones that
			 * don't point to anything or that loop and ones
			 * that we found doing a physical walk.
			 */
			if (!hflag && (fts_options & FTS_LOGICAL))
				continue;
			break;
		default:
			break;
		}

		/*
		 * For -RH, the decision of how to handle symlinks depends
		 * on the level: follow it iff it's a command line arg.
		 */
		if (fts_options & FTS_COMFOLLOW) {
			atflags = p->fts_level == FTS_ROOTLEVEL ? 0 :
			    AT_SYMLINK_NOFOLLOW;
		}

		if (ischmod) {
			if (!fchmodat(AT_FDCWD, p->fts_accpath, oct ? omode :
			    getmode(set, p->fts_statp->st_mode), atflags)
			    || fflag)
				continue;
		} else if (!ischflags) {
			if (!fchownat(AT_FDCWD, p->fts_accpath, uid, gid,
			    atflags) || fflag)
				continue;
		} else {
			if (!chflagsat(AT_FDCWD, p->fts_accpath, oct ? fset :
			    (p->fts_statp->st_flags | fset) & fclear, atflags))
				continue;
		}

		/* error case */
		warn("%s", p->fts_path);
		rval = 1;
	}
	if (errno)
		err(1, "fts_read");
	fts_close(ftsp);
	exit(rval);
}

/*
 * Given a UID or user name in a string, return the UID.  If an empty string
 * was given, returns -1.  If silent is 0, exits on invalid user names/UIDs;
 * otherwise, returns -1.
 */
uid_t
a_uid(const char *s, int silent)
{
	struct passwd *pw;
	const char *errstr;
	uid_t uid;

	if (*s == '\0')			/* Argument was "[:.]gid". */
		return ((uid_t)-1);

	/* User name was given. */
	if ((pw = getpwnam(s)) != NULL)
		return (pw->pw_uid);

	/* UID was given. */
	uid = (uid_t)strtonum(s, 0, UID_MAX, &errstr);
	if (errstr) {
		if (silent)
			return ((uid_t)-1);
		else
			errx(1, "user is %s: %s", errstr, s);
	}

	return (uid);
}

/*
 * Given a GID or group name in a string, return the GID.  If an empty string
 * was given, returns -1.  Exits on invalid user names/UIDs.
 */
gid_t
a_gid(const char *s)
{
	struct group *gr;
	const char *errstr;
	gid_t gid;

	if (*s == '\0')			/* Argument was "uid[:.]". */
		return ((gid_t)-1);

	/* Group name was given. */
	if ((gr = getgrnam(s)) != NULL)
		return (gr->gr_gid);

	/* GID was given. */
	gid = (gid_t)strtonum(s, 0, GID_MAX, &errstr);
	if (errstr)
		errx(1, "group is %s: %s", errstr, s);

	return (gid);
}

void
usage(void)
{
	fprintf(stderr,
	    "usage: %s [-h] [-R [-H | -L | -P]] %s file ...\n",
	    __progname, ischmod ? "mode" : ischflags ? "flags" :
	    ischown ? "owner[:group]" : "group");
	if (ischown)
		fprintf(stderr,
		    "       %s [-h] [-R [-H | -L | -P]] :group file ...\n",
		    __progname);
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: chmod.c,v 1.39 2015/12/31 23:38:16 guenther Exp $ */
2			/* $NetBSD: chmod.c,v 1.12 1995/03/21 09:02:09 cgd Exp $ */
3
4			/*
5			* Copyright (c) 1989, 1993, 1994
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/types.h>
34			#include <sys/stat.h>
35
36			#include <err.h>
37			#include <errno.h>
38			#include <fcntl.h>
39			#include <fts.h>
40			#include <grp.h>
41			#include <limits.h>
42			#include <locale.h>
43			#include <pwd.h>
44			#include <stdio.h>
45			#include <stdlib.h>
46			#include <string.h>
47			#include <unistd.h>
48
49			int ischflags, ischown, ischgrp, ischmod;
50			extern char *__progname;
51
52			gid_t a_gid(const char *);
53			uid_t a_uid(const char *, int);
54			__dead void usage(void);
55
56			int
57			main(int argc, char *argv[])
58		379	{
59			FTS *ftsp;
60			FTSENT *p;
61			void *set;
62			unsigned long val;
63			int oct;
64			mode_t omode;
65			int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval, atflags;
66			uid_t uid;
67			gid_t gid;
68			u_int32_t fclear, fset;
69			char ep, mode, cp, flags;
70
71		379	setlocale(LC_ALL, "");
72
73	✓✗	379	if (strlen(__progname) > 2) {
74		379	ischown = __progname[2] == 'o';
75		379	ischgrp = __progname[2] == 'g';
76		379	ischmod = __progname[2] == 'm';
77		379	ischflags = __progname[2] == 'f';
78			}
79
80		379	uid = (uid_t)-1;
81		379	gid = (gid_t)-1;
82		379	Hflag = Lflag = Rflag = fflag = hflag = 0;
83	✓✓	958	while ((ch = getopt(argc, argv, "HLPRXfghorstuwx")) != -1)
84	✓✓✓✓ ✗✓✗✗	200	switch (ch) {
85			case 'H':
86		8	Hflag = 1;
87		8	Lflag = 0;
88		8	break;
89			case 'L':
90		32	Lflag = 1;
91		32	Hflag = 0;
92		32	break;
93			case 'P':
94		8	Hflag = Lflag = 0;
95		8	break;
96			case 'R':
97		140	Rflag = 1;
98		140	break;
99			case 'f': /* no longer documented. */
100			fflag = 1;
101			break;
102			case 'h':
103		12	hflag = 1;
104		12	break;
105			/*
106			* If this is a symbolic mode argument rather than
107			* an option, we are done with option processing.
108			*/
109			case 'g': case 'o': case 'r': case 's':
110			case 't': case 'u': case 'w': case 'X': case 'x':
111			if (!ischmod)
112			usage();
113			/*
114			* If getopt() moved past the argument, back up.
115			* If the argument contains option letters before
116			* mode letters, setmode() will catch them.
117			*/
118			if (optind > 1) {
119			cp = argv[optind - 1];
120			if (cp[strlen(cp) - 1] == ch)
121			--optind;
122			}
123			goto done;
124			default:
125			usage();
126			}
127		379	done:
128		379	argv += optind;
129		379	argc -= optind;
130
131	✗✓	379	if (argc < 2)
132			usage();
133
134			/*
135			* We alter the symlink itself if doing -h or -RP, or
136			* if doing -RH and the symlink wasn't a command line arg.
137			*/
138		379	atflags = AT_SYMLINK_NOFOLLOW;
139
140		379	fts_options = FTS_PHYSICAL;
141	✓✓	379	if (Rflag) {
142	✗✓	140	if (hflag)
143			errx(1,
144			"the -R and -h options may not be specified together.");
145	✓✓	140	if (Hflag)
146		8	fts_options \|= FTS_COMFOLLOW;
147	✓✓	140	if (Lflag) {
148		32	fts_options &= ~FTS_PHYSICAL;
149		32	fts_options \|= FTS_LOGICAL;
150		32	atflags = 0;
151			}
152	✓✓	239	} else if (!hflag)
153		227	atflags = 0;
154
155	✓✓	379	if (ischflags) {
156	✗✓	28	if (pledge("stdio rpath fattr wpath cpath", NULL) == -1)
157			err(1, "pledge");
158
159		28	flags = *argv;
160	✗✓	28	if (flags >= '0' && flags <= '7') {
161			errno = 0;
162			val = strtoul(flags, &ep, 8);
163			if (val > UINT_MAX)
164			errno = ERANGE;
165			if (errno)
166			err(1, "invalid flags: %s", flags);
167			if (*ep)
168			errx(1, "invalid flags: %s", flags);
169			fset = val;
170			oct = 1;
171			} else {
172	✓✓	28	if (strtofflags(&flags, &fset, &fclear))
173		2	errx(1, "invalid flag: %s", flags);
174		26	fclear = ~fclear;
175		26	oct = 0;
176			}
177	✓✓	351	} else if (ischmod) {
178		275	mode = *argv;
179	✓✓	275	if (mode >= '0' && mode <= '7') {
180		259	errno = 0;
181		259	val = strtoul(mode, &ep, 8);
182	✗✓	259	if (val > INT_MAX)
183			errno = ERANGE;
184	✗✓	259	if (errno)
185			err(1, "invalid file mode: %s", mode);
186	✗✓	259	if (*ep)
187			errx(1, "invalid file mode: %s", mode);
188		259	omode = val;
189		259	oct = 1;
190			} else {
191	✓✓	16	if ((set = setmode(mode)) == NULL)
192		2	errx(1, "invalid file mode: %s", mode);
193		14	oct = 0;
194			}
195	✓✓	76	} else if (ischown) {
196			/* Both UID and GID are given. */
197	✓✓	58	if ((cp = strchr(*argv, ':')) != NULL) {
198		40	*cp++ = '\0';
199		40	gid = a_gid(cp);
200			}
201			#ifdef SUPPORT_DOT
202			/* UID and GID are separated by a dot and UID exists. */
203	✗✓✗✗	18	else if ((cp = strchr(*argv, '.')) != NULL &&
204			(uid = a_uid(*argv, 1)) == (uid_t)-1) {
205			*cp++ = '\0';
206			gid = a_gid(cp);
207			}
208			#endif
209	✓✗	58	if (uid == (uid_t)-1)
210		58	uid = a_uid(*argv, 0);
211			} else
212		18	gid = a_gid(*argv);
213
214	✗✓	371	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
215			err(1, NULL);
216	✓✓	2080	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
217	✓✗✓✓ ✓✓	1338	switch (p->fts_info) {
218			case FTS_D:
219	✓✓	274	if (!Rflag)
220		32	fts_set(ftsp, p, FTS_SKIP);
221	✓✓	274	if (ischmod)
222		178	break;
223			else
224		96	continue;
225			case FTS_DNR: /* Warn, chmod, continue. */
226			warnc(p->fts_errno, "%s", p->fts_path);
227			rval = 1;
228			break;
229			case FTS_DP: /* Already changed at FTS_D. */
230	✓✓	274	if (ischmod)
231		178	continue;
232			else
233		96	break;
234			case FTS_ERR: /* Warn, continue. */
235			case FTS_NS:
236		1	warnc(p->fts_errno, "%s", p->fts_path);
237		1	rval = 1;
238		1	continue;
239			case FTS_SL: /* Ignore. */
240			case FTS_SLNONE:
241			/*
242			* The only symlinks that end up here are ones that
243			* don't point to anything or that loop and ones
244			* that we found doing a physical walk.
245			*/
246	✓✓✗✓	158	if (!hflag && (fts_options & FTS_LOGICAL))
247			continue;
248			break;
249			default:
250			break;
251			}
252
253			/*
254			* For -RH, the decision of how to handle symlinks depends
255			* on the level: follow it iff it's a command line arg.
256			*/
257	✓✓	1063	if (fts_options & FTS_COMFOLLOW) {
258	✓✓	32	atflags = p->fts_level == FTS_ROOTLEVEL ? 0 :
259			AT_SYMLINK_NOFOLLOW;
260			}
261
262	✓✓	1063	if (ischmod) {
263	✓✓✗✓ ✗✗	677	if (!fchmodat(AT_FDCWD, p->fts_accpath, oct ? omode :
264			getmode(set, p->fts_statp->st_mode), atflags)
265			\|\| fflag)
266			continue;
267	✓✓	386	} else if (!ischflags) {
268	✗✓✗✗	264	if (!fchownat(AT_FDCWD, p->fts_accpath, uid, gid,
269			atflags) \|\| fflag)
270			continue;
271			} else {
272	✓✗✓✗	122	if (!chflagsat(AT_FDCWD, p->fts_accpath, oct ? fset :
273			(p->fts_statp->st_flags \| fset) & fclear, atflags))
274		122	continue;
275			}
276
277			/* error case */
278			warn("%s", p->fts_path);
279			rval = 1;
280			}
281	✗✓	371	if (errno)
282			err(1, "fts_read");
283		371	fts_close(ftsp);
284		371	exit(rval);
285			}
286
287			/*
288			* Given a UID or user name in a string, return the UID. If an empty string
289			* was given, returns -1. If silent is 0, exits on invalid user names/UIDs;
290			* otherwise, returns -1.
291			*/
292			uid_t
293			a_uid(const char *s, int silent)
294		58	{
295			struct passwd *pw;
296			const char *errstr;
297			uid_t uid;
298
299	✗✓	58	if (s == '\0') / Argument was "[:.]gid". */
300			return ((uid_t)-1);
301
302			/* User name was given. */
303	✓✓	58	if ((pw = getpwnam(s)) != NULL)
304		54	return (pw->pw_uid);
305
306			/* UID was given. */
307		4	uid = (uid_t)strtonum(s, 0, UID_MAX, &errstr);
308	✓✓	4	if (errstr) {
309	✗✓	2	if (silent)
310			return ((uid_t)-1);
311			else
312		2	errx(1, "user is %s: %s", errstr, s);
313			}
314
315		2	return (uid);
316			}
317
318			/*
319			* Given a GID or group name in a string, return the GID. If an empty string
320			* was given, returns -1. Exits on invalid user names/UIDs.
321			*/
322			gid_t
323			a_gid(const char *s)
324		58	{
325			struct group *gr;
326			const char *errstr;
327			gid_t gid;
328
329	✗✓	58	if (s == '\0') / Argument was "uid[:.]". */
330			return ((gid_t)-1);
331
332			/* Group name was given. */
333	✓✓	58	if ((gr = getgrnam(s)) != NULL)
334		54	return (gr->gr_gid);
335
336			/* GID was given. */
337		4	gid = (gid_t)strtonum(s, 0, GID_MAX, &errstr);
338	✓✓	4	if (errstr)
339		2	errx(1, "group is %s: %s", errstr, s);
340
341		2	return (gid);
342			}
343
344			void
345			usage(void)
346			{
347			fprintf(stderr,
348			"usage: %s [-h] [-R [-H \| -L \| -P]] %s file ...\n",
349			__progname, ischmod ? "mode" : ischflags ? "flags" :
350			ischown ? "owner[:group]" : "group");
351			if (ischown)
352			fprintf(stderr,
353			" %s [-h] [-R [-H \| -L \| -P]] :group file ...\n",
354			__progname);
355			exit(1);
356			}