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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	bin/cp/utils.c	Lines:	32	114	28.1 %
Date:	2016-12-06	Branches:	28	120	23.3 %


/*	$OpenBSD: utils.c,v 1.39 2015/12/26 18:11:43 guenther Exp $	*/
/*	$NetBSD: utils.c,v 1.6 1997/02/26 14:40:51 cgd Exp $	*/

/*-
 * Copyright (c) 1991, 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/param.h>		/* MAXBSIZE */
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/time.h>

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

#include "extern.h"

int
copy_file(FTSENT *entp, int dne)
{
	static char *buf;
	static char *zeroes;
	struct stat to_stat, *fs;
	int ch, checkch, from_fd, rcount, rval, to_fd, wcount;
#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
	char *p;
#endif

	if (!buf) {
		buf = malloc(MAXBSIZE);
		if (!buf)
			err(1, "malloc");
	}
	if (!zeroes) {
		zeroes = calloc(1, MAXBSIZE);
		if (!zeroes)
			err(1, "calloc");
	}

	if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) {
		warn("%s", entp->fts_path);
		return (1);
	}

	fs = entp->fts_statp;

	/*
	 * In -f (force) mode, we always unlink the destination first
	 * if it exists.  Note that -i and -f are mutually exclusive.
	 */
	if (!dne && fflag)
		(void)unlink(to.p_path);

	/*
	 * If the file exists and we're interactive, verify with the user.
	 * If the file DNE, set the mode to be the from file, minus setuid
	 * bits, modified by the umask; arguably wrong, but it makes copying
	 * executables work right and it's been that way forever.  (The
	 * other choice is 666 or'ed with the execute bits on the from file
	 * modified by the umask.)
	 */
	if (!dne && !fflag) {
		if (iflag) {
			(void)fprintf(stderr, "overwrite %s? ", to.p_path);
			checkch = ch = getchar();
			while (ch != '\n' && ch != EOF)
				ch = getchar();
			if (checkch != 'y' && checkch != 'Y') {
				(void)close(from_fd);
				return (0);
			}
		}
		to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0);
	} else
		to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT,
		    fs->st_mode & ~(S_ISTXT | S_ISUID | S_ISGID));

	if (to_fd == -1) {
		warn("%s", to.p_path);
		(void)close(from_fd);
		return (1);
	}

	rval = 0;

	/*
	 * Mmap and write if less than 8M (the limit is so we don't totally
	 * trash memory on big files.  This is really a minor hack, but it
	 * wins some CPU back.
	 */
#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
	/* XXX broken for 0-size mmap */
	if (fs->st_size <= 8 * 1048576) {
		if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ,
		    MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) {
			warn("mmap: %s", entp->fts_path);
			rval = 1;
		} else {
			madvise(p, fs->st_size, MADV_SEQUENTIAL);
			if (write(to_fd, p, fs->st_size) != fs->st_size) {
				warn("%s", to.p_path);
				rval = 1;
			}
			/* Some systems don't unmap on close(2). */
			if (munmap(p, fs->st_size) < 0) {
				warn("%s", entp->fts_path);
				rval = 1;
			}
		}
	} else
#endif
	{
		int skipholes = 0;
		struct stat tosb;
		if (!fstat(to_fd, &tosb) && S_ISREG(tosb.st_mode))
			skipholes = 1;
		while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
			if (skipholes && memcmp(buf, zeroes, rcount) == 0)
				wcount = lseek(to_fd, rcount, SEEK_CUR) == -1 ? -1 : rcount;
			else
				wcount = write(to_fd, buf, rcount);
			if (rcount != wcount || wcount == -1) {
				warn("%s", to.p_path);
				rval = 1;
				break;
			}
		}
		if (skipholes && rcount >= 0)
			rcount = ftruncate(to_fd, lseek(to_fd, 0, SEEK_CUR));
		if (rcount < 0) {
			warn("%s", entp->fts_path);
			rval = 1;
		}
	}

	if (rval == 1) {
		(void)close(from_fd);
		(void)close(to_fd);
		return (1);
	}

	if (pflag && setfile(fs, to_fd))
		rval = 1;
	/*
	 * If the source was setuid or setgid, lose the bits unless the
	 * copy is owned by the same user and group.
	 */
#define	RETAINBITS \
	(S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
	if (!pflag && dne &&
	    fs->st_mode & (S_ISUID | S_ISGID) && fs->st_uid == myuid) {
		if (fstat(to_fd, &to_stat)) {
			warn("%s", to.p_path);
			rval = 1;
		} else if (fs->st_gid == to_stat.st_gid &&
		    fchmod(to_fd, fs->st_mode & RETAINBITS & ~myumask)) {
			warn("%s", to.p_path);
			rval = 1;
		}
	}
	(void)close(from_fd);
	if (close(to_fd)) {
		warn("%s", to.p_path);
		rval = 1;
	}
	return (rval);
}

int
copy_link(FTSENT *p, int exists)
{
	int len;
	char name[PATH_MAX];

	if ((len = readlink(p->fts_path, name, sizeof(name)-1)) == -1) {
		warn("readlink: %s", p->fts_path);
		return (1);
	}
	name[len] = '\0';
	if (exists && unlink(to.p_path)) {
		warn("unlink: %s", to.p_path);
		return (1);
	}
	if (symlink(name, to.p_path)) {
		warn("symlink: %s", name);
		return (1);
	}
	return (pflag ? setfile(p->fts_statp, -1) : 0);
}

int
copy_fifo(struct stat *from_stat, int exists)
{
	if (exists && unlink(to.p_path)) {
		warn("unlink: %s", to.p_path);
		return (1);
	}
	if (mkfifo(to.p_path, from_stat->st_mode)) {
		warn("mkfifo: %s", to.p_path);
		return (1);
	}
	return (pflag ? setfile(from_stat, -1) : 0);
}

int
copy_special(struct stat *from_stat, int exists)
{
	if (exists && unlink(to.p_path)) {
		warn("unlink: %s", to.p_path);
		return (1);
	}
	if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
		warn("mknod: %s", to.p_path);
		return (1);
	}
	return (pflag ? setfile(from_stat, -1) : 0);
}


int
setfile(struct stat *fs, int fd)
{
	struct timespec ts[2];
	int rval;

	rval = 0;
	fs->st_mode &= S_ISTXT | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;

	ts[0] = fs->st_atim;
	ts[1] = fs->st_mtim;
	if (fd >= 0 ? futimens(fd, ts) :
	    utimensat(AT_FDCWD, to.p_path, ts, AT_SYMLINK_NOFOLLOW)) {
		warn("update times: %s", to.p_path);
		rval = 1;
	}
	/*
	 * Changing the ownership probably won't succeed, unless we're root
	 * or POSIX_CHOWN_RESTRICTED is not set.  Set uid/gid before setting
	 * the mode; current BSD behavior is to remove all setuid bits on
	 * chown.  If chown fails, lose setuid/setgid bits.
	 */
	if (fd >= 0 ? fchown(fd, fs->st_uid, fs->st_gid) :
	    lchown(to.p_path, fs->st_uid, fs->st_gid)) {
		if (errno != EPERM) {
			warn("chown: %s", to.p_path);
			rval = 1;
		}
		fs->st_mode &= ~(S_ISTXT | S_ISUID | S_ISGID);
	}
	if (fd >= 0 ? fchmod(fd, fs->st_mode) :
	    fchmodat(AT_FDCWD, to.p_path, fs->st_mode, AT_SYMLINK_NOFOLLOW)) {
		warn("chmod: %s", to.p_path);
		rval = 1;
	}

	/*
	 * XXX
	 * NFS doesn't support chflags; ignore errors unless there's reason
	 * to believe we're losing bits.  (Note, this still won't be right
	 * if the server supports flags and we were trying to *remove* flags
	 * on a file that we copied, i.e., that we didn't create.)
	 */
	errno = 0;
	if (fd >= 0 ? fchflags(fd, fs->st_flags) :
	    chflagsat(AT_FDCWD, to.p_path, fs->st_flags, AT_SYMLINK_NOFOLLOW))
		if (errno != EOPNOTSUPP || fs->st_flags != 0) {
			warn("chflags: %s", to.p_path);
			rval = 1;
		}
	return (rval);
}


void
usage(void)
{
	(void)fprintf(stderr,
	    "usage: %s [-fip] [-R [-H | -L | -P]] source target\n", __progname);
	(void)fprintf(stderr,
	    "       %s [-fip] [-R [-H | -L | -P]] source ... directory\n",
	    __progname);
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: utils.c,v 1.39 2015/12/26 18:11:43 guenther Exp $ */
2			/* $NetBSD: utils.c,v 1.6 1997/02/26 14:40:51 cgd Exp $ */
3
4			/*-
5			* Copyright (c) 1991, 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/param.h> /* MAXBSIZE */
34			#include <sys/stat.h>
35			#include <sys/mman.h>
36			#include <sys/time.h>
37
38			#include <err.h>
39			#include <errno.h>
40			#include <fcntl.h>
41			#include <fts.h>
42			#include <stdio.h>
43			#include <stdlib.h>
44			#include <string.h>
45			#include <unistd.h>
46			#include <limits.h>
47
48			#include "extern.h"
49
50			int
51			copy_file(FTSENT *entp, int dne)
52		83	{
53			static char *buf;
54			static char *zeroes;
55			struct stat to_stat, *fs;
56			int ch, checkch, from_fd, rcount, rval, to_fd, wcount;
57			#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
58			char *p;
59			#endif
60
61	✓✗	83	if (!buf) {
62		83	buf = malloc(MAXBSIZE);
63	✗✓	83	if (!buf)
64			err(1, "malloc");
65			}
66	✓✗	83	if (!zeroes) {
67		83	zeroes = calloc(1, MAXBSIZE);
68	✗✓	83	if (!zeroes)
69			err(1, "calloc");
70			}
71
72	✗✓	83	if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) {
73			warn("%s", entp->fts_path);
74			return (1);
75			}
76
77		83	fs = entp->fts_statp;
78
79			/*
80			* In -f (force) mode, we always unlink the destination first
81			* if it exists. Note that -i and -f are mutually exclusive.
82			*/
83	✓✓✗✓	83	if (!dne && fflag)
84			(void)unlink(to.p_path);
85
86			/*
87			* If the file exists and we're interactive, verify with the user.
88			* If the file DNE, set the mode to be the from file, minus setuid
89			* bits, modified by the umask; arguably wrong, but it makes copying
90			* executables work right and it's been that way forever. (The
91			* other choice is 666 or'ed with the execute bits on the from file
92			* modified by the umask.)
93			*/
94	✓✓✓✗	103	if (!dne && !fflag) {
95	✗✓	20	if (iflag) {
96			(void)fprintf(stderr, "overwrite %s? ", to.p_path);
97			checkch = ch = getchar();
98			while (ch != '\n' && ch != EOF)
99			ch = getchar();
100			if (checkch != 'y' && checkch != 'Y') {
101			(void)close(from_fd);
102			return (0);
103			}
104			}
105		20	to_fd = open(to.p_path, O_WRONLY \| O_TRUNC, 0);
106			} else
107		63	to_fd = open(to.p_path, O_WRONLY \| O_TRUNC \| O_CREAT,
108			fs->st_mode & ~(S_ISTXT \| S_ISUID \| S_ISGID));
109
110	✗✓	83	if (to_fd == -1) {
111			warn("%s", to.p_path);
112			(void)close(from_fd);
113			return (1);
114			}
115
116		83	rval = 0;
117
118			/*
119			* Mmap and write if less than 8M (the limit is so we don't totally
120			* trash memory on big files. This is really a minor hack, but it
121			* wins some CPU back.
122			*/
123			#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
124			/* XXX broken for 0-size mmap */
125			if (fs->st_size <= 8 * 1048576) {
126			if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ,
127			MAP_FILE\|MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) {
128			warn("mmap: %s", entp->fts_path);
129			rval = 1;
130			} else {
131			madvise(p, fs->st_size, MADV_SEQUENTIAL);
132			if (write(to_fd, p, fs->st_size) != fs->st_size) {
133			warn("%s", to.p_path);
134			rval = 1;
135			}
136			/* Some systems don't unmap on close(2). */
137			if (munmap(p, fs->st_size) < 0) {
138			warn("%s", entp->fts_path);
139			rval = 1;
140			}
141			}
142			} else
143			#endif
144			{
145		83	int skipholes = 0;
146			struct stat tosb;
147	✓✗✓✗	83	if (!fstat(to_fd, &tosb) && S_ISREG(tosb.st_mode))
148		83	skipholes = 1;
149	✓✓	158	while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
150	✓✗✗✓	75	if (skipholes && memcmp(buf, zeroes, rcount) == 0)
151			wcount = lseek(to_fd, rcount, SEEK_CUR) == -1 ? -1 : rcount;
152			else
153		75	wcount = write(to_fd, buf, rcount);
154	✗✓	75	if (rcount != wcount \|\| wcount == -1) {
155			warn("%s", to.p_path);
156			rval = 1;
157			break;
158			}
159			}
160	✓✗	83	if (skipholes && rcount >= 0)
161		83	rcount = ftruncate(to_fd, lseek(to_fd, 0, SEEK_CUR));
162	✗✓	83	if (rcount < 0) {
163			warn("%s", entp->fts_path);
164			rval = 1;
165			}
166			}
167
168	✗✓	83	if (rval == 1) {
169			(void)close(from_fd);
170			(void)close(to_fd);
171			return (1);
172			}
173
174	✗✓✗✗	83	if (pflag && setfile(fs, to_fd))
175			rval = 1;
176			/*
177			* If the source was setuid or setgid, lose the bits unless the
178			* copy is owned by the same user and group.
179			*/
180			#define RETAINBITS \
181			(S_ISUID \| S_ISGID \| S_ISVTX \| S_IRWXU \| S_IRWXG \| S_IRWXO)
182	✓✓✗✓ ✗✗	83	if (!pflag && dne &&
183			fs->st_mode & (S_ISUID \| S_ISGID) && fs->st_uid == myuid) {
184			if (fstat(to_fd, &to_stat)) {
185			warn("%s", to.p_path);
186			rval = 1;
187			} else if (fs->st_gid == to_stat.st_gid &&
188			fchmod(to_fd, fs->st_mode & RETAINBITS & ~myumask)) {
189			warn("%s", to.p_path);
190			rval = 1;
191			}
192			}
193		83	(void)close(from_fd);
194	✗✓	83	if (close(to_fd)) {
195			warn("%s", to.p_path);
196			rval = 1;
197			}
198		83	return (rval);
199			}
200
201			int
202			copy_link(FTSENT *p, int exists)
203			{
204			int len;
205			char name[PATH_MAX];
206
207			if ((len = readlink(p->fts_path, name, sizeof(name)-1)) == -1) {
208			warn("readlink: %s", p->fts_path);
209			return (1);
210			}
211			name[len] = '\0';
212			if (exists && unlink(to.p_path)) {
213			warn("unlink: %s", to.p_path);
214			return (1);
215			}
216			if (symlink(name, to.p_path)) {
217			warn("symlink: %s", name);
218			return (1);
219			}
220			return (pflag ? setfile(p->fts_statp, -1) : 0);
221			}
222
223			int
224			copy_fifo(struct stat *from_stat, int exists)
225			{
226			if (exists && unlink(to.p_path)) {
227			warn("unlink: %s", to.p_path);
228			return (1);
229			}
230			if (mkfifo(to.p_path, from_stat->st_mode)) {
231			warn("mkfifo: %s", to.p_path);
232			return (1);
233			}
234			return (pflag ? setfile(from_stat, -1) : 0);
235			}
236
237			int
238			copy_special(struct stat *from_stat, int exists)
239			{
240			if (exists && unlink(to.p_path)) {
241			warn("unlink: %s", to.p_path);
242			return (1);
243			}
244			if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
245			warn("mknod: %s", to.p_path);
246			return (1);
247			}
248			return (pflag ? setfile(from_stat, -1) : 0);
249			}
250
251
252			int
253			setfile(struct stat *fs, int fd)
254			{
255			struct timespec ts[2];
256			int rval;
257
258			rval = 0;
259			fs->st_mode &= S_ISTXT \| S_ISUID \| S_ISGID \| S_IRWXU \| S_IRWXG \| S_IRWXO;
260
261			ts[0] = fs->st_atim;
262			ts[1] = fs->st_mtim;
263			if (fd >= 0 ? futimens(fd, ts) :
264			utimensat(AT_FDCWD, to.p_path, ts, AT_SYMLINK_NOFOLLOW)) {
265			warn("update times: %s", to.p_path);
266			rval = 1;
267			}
268			/*
269			* Changing the ownership probably won't succeed, unless we're root
270			* or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
271			* the mode; current BSD behavior is to remove all setuid bits on
272			* chown. If chown fails, lose setuid/setgid bits.
273			*/
274			if (fd >= 0 ? fchown(fd, fs->st_uid, fs->st_gid) :
275			lchown(to.p_path, fs->st_uid, fs->st_gid)) {
276			if (errno != EPERM) {
277			warn("chown: %s", to.p_path);
278			rval = 1;
279			}
280			fs->st_mode &= ~(S_ISTXT \| S_ISUID \| S_ISGID);
281			}
282			if (fd >= 0 ? fchmod(fd, fs->st_mode) :
283			fchmodat(AT_FDCWD, to.p_path, fs->st_mode, AT_SYMLINK_NOFOLLOW)) {
284			warn("chmod: %s", to.p_path);
285			rval = 1;
286			}
287
288			/*
289			* XXX
290			* NFS doesn't support chflags; ignore errors unless there's reason
291			* to believe we're losing bits. (Note, this still won't be right
292			* if the server supports flags and we were trying to remove flags
293			* on a file that we copied, i.e., that we didn't create.)
294			*/
295			errno = 0;
296			if (fd >= 0 ? fchflags(fd, fs->st_flags) :
297			chflagsat(AT_FDCWD, to.p_path, fs->st_flags, AT_SYMLINK_NOFOLLOW))
298			if (errno != EOPNOTSUPP \|\| fs->st_flags != 0) {
299			warn("chflags: %s", to.p_path);
300			rval = 1;
301			}
302			return (rval);
303			}
304
305
306			void
307			usage(void)
308			{
309			(void)fprintf(stderr,
310			"usage: %s [-fip] [-R [-H \| -L \| -P]] source target\n", __progname);
311			(void)fprintf(stderr,
312			" %s [-fip] [-R [-H \| -L \| -P]] source ... directory\n",
313			__progname);
314			exit(1);
315			}