Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/mknod/mknod.c	Lines:	0	86	0.0 %
Date:	2017-11-13	Branches:	0	54	0.0 %


/*	$OpenBSD: mknod.c,v 1.30 2016/10/20 10:24:40 schwarze Exp $	*/
/*	$NetBSD: mknod.c,v 1.8 1995/08/11 00:08:18 jtc Exp $	*/

/*
 * Copyright (c) 1997-2016 Theo de Raadt <deraadt@openbsd.org>,
 *	Marc Espie <espie@openbsd.org>,	Todd Miller <millert@openbsd.org>,
 *	Martin Natano <natano@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

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

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

extern char *__progname;

struct node {
	const char *name;
	mode_t mode;
	dev_t dev;
	char mflag;
};

static int domakenodes(struct node *, int);
static dev_t compute_device(int, char **);
__dead static void usage(int);

int
main(int argc, char *argv[])
{
	struct node *node;
	int ismkfifo;
	int n = 0;
	int mode = DEFFILEMODE;
	int mflag = 0;
	void *set;
	int ch;

	if (pledge("stdio dpath flock rpath cpath wpath", NULL) == -1)
		err(1, "pledge");

	node = reallocarray(NULL, sizeof(struct node), argc);
	if (!node)
		err(1, NULL);

	ismkfifo = strcmp(__progname, "mkfifo") == 0;

	/* we parse all arguments upfront */
	while (argc > 1) {
		while ((ch = getopt(argc, argv, "m:")) != -1) {
			switch (ch) {
			case 'm':
				if (!(set = setmode(optarg)))
					errx(1, "invalid file mode '%s'",
					    optarg);
				/*
				 * In symbolic mode strings, the + and -
				 * operators are interpreted relative to
				 * an assumed initial mode of a=rw.
				 */
				mode = getmode(set, DEFFILEMODE);
				if ((mode & ACCESSPERMS) != mode)
					errx(1, "forbidden mode: %o", mode);
				mflag = 1;
				free(set);
				break;
			default:
				usage(ismkfifo);
			}
		}
		argc -= optind;
		argv += optind;

		if (ismkfifo) {
			while (*argv) {
				node[n].mode = mode | S_IFIFO;
				node[n].mflag = mflag;
				node[n].name = *argv;
				node[n].dev = 0;
				n++;
				argv++;
			}
			/* XXX no multiple getopt */
			break;
		} else {
			if (argc < 2)
				usage(ismkfifo);
			node[n].mode = mode;
			node[n].mflag = mflag;
			node[n].name = argv[0];
			if (strlen(argv[1]) != 1)
				errx(1, "invalid device type '%s'", argv[1]);

			/* XXX computation offset by one for next getopt */
			switch(argv[1][0]) {
			case 'p':
				node[n].mode |= S_IFIFO;
				node[n].dev = 0;
				argv++;
				argc--;
				break;
			case 'b':
				node[n].mode |= S_IFBLK;
				goto common;
			case 'c':
				node[n].mode |= S_IFCHR;
common:
				node[n].dev = compute_device(argc, argv);
				argv+=3;
				argc-=3;
				break;
			default:
				errx(1, "invalid device type '%s'", argv[1]);
			}
			n++;
		}
		optind = 1;
		optreset = 1;
	}

	if (n == 0)
		usage(ismkfifo);

	return (domakenodes(node, n));
}

static dev_t
compute_device(int argc, char **argv)
{
	dev_t dev;
	char *endp;
	unsigned long major, minor;

	if (argc < 4)
		usage(0);

	errno = 0;
	major = strtoul(argv[2], &endp, 0);
	if (endp == argv[2] || *endp != '\0')
		errx(1, "invalid major number '%s'", argv[2]);
	if (errno == ERANGE && major == ULONG_MAX)
		errx(1, "major number too large: '%s'", argv[2]);

	errno = 0;
	minor = strtoul(argv[3], &endp, 0);
	if (endp == argv[3] || *endp != '\0')
		errx(1, "invalid minor number '%s'", argv[3]);
	if (errno == ERANGE && minor == ULONG_MAX)
		errx(1, "minor number too large: '%s'", argv[3]);

	dev = makedev(major, minor);
	if (major(dev) != major || minor(dev) != minor)
		errx(1, "major or minor number too large (%lu %lu)", major,
		    minor);

	return dev;
}

static int
domakenodes(struct node *node, int n)
{
	int done_umask = 0;
	int rv = 0;
	int i;

	for (i = 0; i != n; i++) {
		int r;
		/*
		 * If the user specified a mode via `-m', don't allow the umask
		 * to modify it.  If no `-m' flag was specified, the default
		 * mode is the value of the bitwise inclusive or of S_IRUSR,
		 * S_IWUSR, S_IRGRP, S_IWGRP, S_IROTH, and S_IWOTH as
		 * modified by the umask.
		 */
		if (node[i].mflag && !done_umask) {
			(void)umask(0);
			done_umask = 1;
		}

		r = mknod(node[i].name, node[i].mode, node[i].dev);
		if (r < 0) {
			warn("%s", node[i].name);
			rv = 1;
		}
	}

	free(node);
	return rv;
}

__dead static void
usage(int ismkfifo)
{

	if (ismkfifo == 1)
		(void)fprintf(stderr, "usage: %s [-m mode] fifo_name ...\n",
		    __progname);
	else {
		(void)fprintf(stderr,
		    "usage: %s [-m mode] name b|c major minor\n",
		    __progname);
		(void)fprintf(stderr, "       %s [-m mode] name p\n",
		    __progname);
	}
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: mknod.c,v 1.30 2016/10/20 10:24:40 schwarze Exp $ */
2			/* $NetBSD: mknod.c,v 1.8 1995/08/11 00:08:18 jtc Exp $ */
3
4			/*
5			* Copyright (c) 1997-2016 Theo de Raadt <deraadt@openbsd.org>,
6			* Marc Espie <espie@openbsd.org>, Todd Miller <millert@openbsd.org>,
7			* Martin Natano <natano@openbsd.org>
8			*
9			* Permission to use, copy, modify, and distribute this software for any
10			* purpose with or without fee is hereby granted, provided that the above
11			* copyright notice and this permission notice appear in all copies.
12			*
13			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20			*/
21
22			#include <sys/types.h>
23			#include <sys/stat.h>
24
25			#include <err.h>
26			#include <errno.h>
27			#include <limits.h>
28			#include <stdio.h>
29			#include <stdlib.h>
30			#include <string.h>
31			#include <unistd.h>
32
33			extern char *__progname;
34
35			struct node {
36			const char *name;
37			mode_t mode;
38			dev_t dev;
39			char mflag;
40			};
41
42			static int domakenodes(struct node *, int);
43			static dev_t compute_device(int, char **);
44			__dead static void usage(int);
45
46			int
47			main(int argc, char *argv[])
48			{
49			struct node *node;
50			int ismkfifo;
51			int n = 0;
52			int mode = DEFFILEMODE;
53			int mflag = 0;
54			void *set;
55			int ch;
56
57			if (pledge("stdio dpath flock rpath cpath wpath", NULL) == -1)
58			err(1, "pledge");
59
60			node = reallocarray(NULL, sizeof(struct node), argc);
61			if (!node)
62			err(1, NULL);
63
64			ismkfifo = strcmp(__progname, "mkfifo") == 0;
65
66			/* we parse all arguments upfront */
67			while (argc > 1) {
68			while ((ch = getopt(argc, argv, "m:")) != -1) {
69			switch (ch) {
70			case 'm':
71			if (!(set = setmode(optarg)))
72			errx(1, "invalid file mode '%s'",
73			optarg);
74			/*
75			* In symbolic mode strings, the + and -
76			* operators are interpreted relative to
77			* an assumed initial mode of a=rw.
78			*/
79			mode = getmode(set, DEFFILEMODE);
80			if ((mode & ACCESSPERMS) != mode)
81			errx(1, "forbidden mode: %o", mode);
82			mflag = 1;
83			free(set);
84			break;
85			default:
86			usage(ismkfifo);
87			}
88			}
89			argc -= optind;
90			argv += optind;
91
92			if (ismkfifo) {
93			while (*argv) {
94			node[n].mode = mode \| S_IFIFO;
95			node[n].mflag = mflag;
96			node[n].name = *argv;
97			node[n].dev = 0;
98			n++;
99			argv++;
100			}
101			/* XXX no multiple getopt */
102			break;
103			} else {
104			if (argc < 2)
105			usage(ismkfifo);
106			node[n].mode = mode;
107			node[n].mflag = mflag;
108			node[n].name = argv[0];
109			if (strlen(argv[1]) != 1)
110			errx(1, "invalid device type '%s'", argv[1]);
111
112			/* XXX computation offset by one for next getopt */
113			switch(argv[1][0]) {
114			case 'p':
115			node[n].mode \|= S_IFIFO;
116			node[n].dev = 0;
117			argv++;
118			argc--;
119			break;
120			case 'b':
121			node[n].mode \|= S_IFBLK;
122			goto common;
123			case 'c':
124			node[n].mode \|= S_IFCHR;
125			common:
126			node[n].dev = compute_device(argc, argv);
127			argv+=3;
128			argc-=3;
129			break;
130			default:
131			errx(1, "invalid device type '%s'", argv[1]);
132			}
133			n++;
134			}
135			optind = 1;
136			optreset = 1;
137			}
138
139			if (n == 0)
140			usage(ismkfifo);
141
142			return (domakenodes(node, n));
143			}
144
145			static dev_t
146			compute_device(int argc, char **argv)
147			{
148			dev_t dev;
149			char *endp;
150			unsigned long major, minor;
151
152			if (argc < 4)
153			usage(0);
154
155			errno = 0;
156			major = strtoul(argv[2], &endp, 0);
157			if (endp == argv[2] \|\| *endp != '\0')
158			errx(1, "invalid major number '%s'", argv[2]);
159			if (errno == ERANGE && major == ULONG_MAX)
160			errx(1, "major number too large: '%s'", argv[2]);
161
162			errno = 0;
163			minor = strtoul(argv[3], &endp, 0);
164			if (endp == argv[3] \|\| *endp != '\0')
165			errx(1, "invalid minor number '%s'", argv[3]);
166			if (errno == ERANGE && minor == ULONG_MAX)
167			errx(1, "minor number too large: '%s'", argv[3]);
168
169			dev = makedev(major, minor);
170			if (major(dev) != major \|\| minor(dev) != minor)
171			errx(1, "major or minor number too large (%lu %lu)", major,
172			minor);
173
174			return dev;
175			}
176
177			static int
178			domakenodes(struct node *node, int n)
179			{
180			int done_umask = 0;
181			int rv = 0;
182			int i;
183
184			for (i = 0; i != n; i++) {
185			int r;
186			/*
187			* If the user specified a mode via `-m', don't allow the umask
188			* to modify it. If no `-m' flag was specified, the default
189			* mode is the value of the bitwise inclusive or of S_IRUSR,
190			* S_IWUSR, S_IRGRP, S_IWGRP, S_IROTH, and S_IWOTH as
191			* modified by the umask.
192			*/
193			if (node[i].mflag && !done_umask) {
194			(void)umask(0);
195			done_umask = 1;
196			}
197
198			r = mknod(node[i].name, node[i].mode, node[i].dev);
199			if (r < 0) {
200			warn("%s", node[i].name);
201			rv = 1;
202			}
203			}
204
205			free(node);
206			return rv;
207			}
208
209			__dead static void
210			usage(int ismkfifo)
211			{
212
213			if (ismkfifo == 1)
214			(void)fprintf(stderr, "usage: %s [-m mode] fifo_name ...\n",
215			__progname);
216			else {
217			(void)fprintf(stderr,
218			"usage: %s [-m mode] name b\|c major minor\n",
219			__progname);
220			(void)fprintf(stderr, " %s [-m mode] name p\n",
221			__progname);
222			}
223			exit(1);
224			}