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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libfuse/fuse.c	Lines:	0	203	0.0 %
Date:	2017-11-07	Branches:	0	92	0.0 %


/* $OpenBSD: fuse.c,v 1.29 2017/08/21 21:41:13 deraadt Exp $ */
/*
 * Copyright (c) 2013 Sylvestre Gallon <ccna.syl@gmail.com>
 *
 * 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/wait.h>
#include <sys/types.h>
#include <sys/ioctl.h>

#include <miscfs/fuse/fusefs.h>

#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "fuse_opt.h"
#include "fuse_private.h"
#include "debug.h"

static struct fuse_session *sigse;
static struct fuse_context *ictx = NULL;
static int max_read = FUSEBUFMAXSIZE;

enum {
	KEY_HELP,
	KEY_HELP_WITHOUT_HEADER,
	KEY_VERSION,
	KEY_MAXREAD,
	KEY_STUB
};

static struct fuse_opt fuse_core_opts[] = {
	FUSE_OPT_KEY("-h",			KEY_HELP),
	FUSE_OPT_KEY("--help",			KEY_HELP),
	FUSE_OPT_KEY("-ho",			KEY_HELP_WITHOUT_HEADER),
	FUSE_OPT_KEY("-V",			KEY_VERSION),
	FUSE_OPT_KEY("--version",		KEY_VERSION),
	FUSE_OPT_KEY("max_read=",		KEY_MAXREAD),
	FUSE_OPT_KEY("debug",			KEY_STUB),
	FUSE_OPT_KEY("-d",			KEY_STUB),
	FUSE_OPT_KEY("-f",			KEY_STUB),
	FUSE_OPT_KEY("-s",			KEY_STUB),
	FUSE_OPT_KEY("use_ino",			KEY_STUB),
	FUSE_OPT_KEY("big_writes",		KEY_STUB),
	FUSE_OPT_KEY("default_permissions",	KEY_STUB),
	FUSE_OPT_KEY("fsname=",			KEY_STUB),
	FUSE_OPT_END
};

int
fuse_loop(struct fuse *fuse)
{
	struct fusebuf fbuf;
	struct fuse_context ctx;
	struct fb_ioctl_xch ioexch;
	struct kevent ev;
	ssize_t n;
	int ret;

	fuse->fc->kq = kqueue();
	if (fuse->fc->kq == -1)
		return (-1);

	EV_SET(&fuse->fc->event, fuse->fc->fd, EVFILT_READ, EV_ADD |
	    EV_ENABLE, 0, 0, 0);

	while (!fuse->fc->dead) {
		ret = kevent(fuse->fc->kq, &fuse->fc->event, 1, &ev, 1, NULL);
		if (ret == -1)
			DPERROR(__func__);
		else if (ret > 0) {
			n = read(fuse->fc->fd, &fbuf, sizeof(fbuf));
			if (n != sizeof(fbuf)) {
				fprintf(stderr, "%s: bad fusebuf read\n",
				    __func__);
				return (-1);
			}

			/* check if there is data something present */
			if (fbuf.fb_len) {
				fbuf.fb_dat = malloc(fbuf.fb_len);
				if (fbuf.fb_dat == NULL)
					return (-1);
				ioexch.fbxch_uuid = fbuf.fb_uuid;
				ioexch.fbxch_len = fbuf.fb_len;
				ioexch.fbxch_data = fbuf.fb_dat;

				if (ioctl(fuse->fc->fd, FIOCGETFBDAT,
				    &ioexch)) {
					free(fbuf.fb_dat);
					return (-1);
				}
			}

			ctx.fuse = fuse;
			ctx.uid = fuse->conf.uid;
			ctx.gid = fuse->conf.gid;
			ctx.pid = fuse->conf.pid;
			ctx.umask = fuse->conf.umask;
			ctx.private_data = fuse->private_data;
			ictx = &ctx;

			ret = ifuse_exec_opcode(fuse, &fbuf);
			if (ret) {
				ictx = NULL;
				return (-1);
			}

			n = write(fuse->fc->fd, &fbuf, sizeof(fbuf));
			if (fbuf.fb_len) {
				if (fbuf.fb_dat == NULL) {
					fprintf(stderr, "%s: fb_dat is Null\n",
					    __func__);
					return (-1);
				}
				ioexch.fbxch_uuid = fbuf.fb_uuid;
				ioexch.fbxch_len = fbuf.fb_len;
				ioexch.fbxch_data = fbuf.fb_dat;

				if (ioctl(fuse->fc->fd, FIOCSETFBDAT, &ioexch)) {
					free(fbuf.fb_dat);
					return (-1);
				}
				free(fbuf.fb_dat);
			}
			ictx = NULL;

			if (n != FUSEBUFSIZE) {
				errno = EINVAL;
				return (-1);
			}
		}
	}

	return (0);
}

struct fuse_chan *
fuse_mount(const char *dir, unused struct fuse_args *args)
{
	struct fusefs_args fargs;
	struct fuse_chan *fc;
	const char *errcause;

	fc = calloc(1, sizeof(*fc));
	if (fc == NULL)
		return (NULL);

	fc->dir = realpath(dir, NULL);
	if (fc->dir == NULL)
		goto bad;

	if ((fc->fd = open("/dev/fuse0", O_RDWR)) == -1) {
		perror(__func__);
		goto bad;
	}

	fargs.fd = fc->fd;
	fargs.max_read = max_read;
	if (mount(MOUNT_FUSEFS, fc->dir, 0, &fargs)) {
		switch (errno) {
		case EMFILE:
			errcause = "mount table full";
			break;
		case EOPNOTSUPP:
			errcause = "filesystem not supported by kernel";
			break;
		default:
			errcause = strerror(errno);
			break;
		}
		fprintf(stderr, "%s on %s: %s\n", __func__, dir, errcause);
		goto bad;
	}

	return (fc);
bad:
	if (fc->fd != -1)
		close(fc->fd);
	free(fc->dir);
	free(fc);
	return (NULL);
}

void
fuse_unmount(const char *dir, unused struct fuse_chan *ch)
{
	if (ch->dead)
		return;

	if (unmount(dir, MNT_UPDATE) == -1)
		DPERROR(__func__);
}

int
fuse_is_lib_option(unused const char *opt)
{
	return (fuse_opt_match(fuse_core_opts, opt));
}

int
fuse_chan_fd(struct fuse_chan *ch)
{
	return (ch->fd);
}

struct fuse_session *
fuse_get_session(struct fuse *f)
{
	return (&f->se);
}

int
fuse_loop_mt(unused struct fuse *fuse)
{
	return (0);
}

struct fuse *
fuse_new(struct fuse_chan *fc, unused struct fuse_args *args,
    const struct fuse_operations *ops, unused size_t size,
    unused void *userdata)
{
	struct fuse *fuse;
	struct fuse_vnode *root;

	if ((fuse = calloc(1, sizeof(*fuse))) == NULL)
		return (NULL);

	/* copy fuse ops to their own structure */
	memcpy(&fuse->op, ops, sizeof(fuse->op));

	fuse->fc = fc;
	fuse->max_ino = FUSE_ROOT_INO;
	fuse->se.args = fuse;
	fuse->private_data = userdata;

	if ((root = alloc_vn(fuse, "/", FUSE_ROOT_INO, 0)) == NULL) {
		free(fuse);
		return (NULL);
	}

	tree_init(&fuse->vnode_tree);
	tree_init(&fuse->name_tree);
	if (!set_vn(fuse, root)) {
		free(fuse);
		return (NULL);
	}

	return (fuse);
}

int
fuse_daemonize(unused int foreground)
{
#ifdef DEBUG
	return (daemon(0,1));
#else
	return (daemon(0,0));
#endif
}

void
fuse_destroy(unused struct fuse *f)
{
	close(f->fc->fd);
	free(f->fc->dir);
	free(f->fc);
	free(f);
}

static void
ifuse_get_signal(unused int num)
{
	struct fuse *f;
	pid_t child;
	int status;

	if (sigse != NULL) {
		child = fork();

		if (child < 0)
			return;

		f = sigse->args;
		if (child == 0) {
			fuse_unmount(f->fc->dir, f->fc);
			sigse = NULL;
			exit(0);
		}

		fuse_loop(f);
		while (waitpid(child, &status, 0) == -1) {
			if (errno != EINTR)
				break;
		}
	}
}

void
fuse_remove_signal_handlers(unused struct fuse_session *se)
{
	sigse = NULL;
	signal(SIGHUP, SIG_DFL);
	signal(SIGINT, SIG_DFL);
	signal(SIGTERM, SIG_DFL);
	signal(SIGPIPE, SIG_DFL);
}

int
fuse_set_signal_handlers(unused struct fuse_session *se)
{
	sigse = se;
	signal(SIGHUP, ifuse_get_signal);
	signal(SIGINT, ifuse_get_signal);
	signal(SIGTERM, ifuse_get_signal);
	signal(SIGPIPE, SIG_IGN);
	return (0);
}

static void
dump_help(void)
{
	fprintf(stderr, "FUSE options:\n"
	    "    -d   -o debug          enable debug output (implies -f)\n"
	    "    -V                     print fuse version\n"
	    "\n");
}

static void
dump_version(void)
{
	fprintf(stderr, "FUSE library version %i\n", FUSE_USE_VERSION);
}

static int
ifuse_process_opt(void *data, const char *arg, int key,
    unused struct fuse_args *args)
{
	struct fuse_core_opt *opt = data;
	struct stat st;
	const char *err;
	int res;

	switch (key) {
		case KEY_STUB:
			return (0);
		case KEY_HELP:
		case KEY_HELP_WITHOUT_HEADER:
			dump_help();
			return (-1);
		case KEY_VERSION:
			dump_version();
			return (-1);
		case KEY_MAXREAD:
			res = strtonum(arg, 0, FUSEBUFMAXSIZE, &err);
			if (err) {
				fprintf(stderr, "fuse: max_read %s\n", err);
				return (-1);
			}
			max_read = res;
			break;
		case FUSE_OPT_KEY_NONOPT:
			if (opt->mp == NULL) {
				opt->mp = realpath(arg, opt->mp);
				if (opt->mp == NULL) {
					fprintf(stderr, "fuse: realpath: "
					    "%s : %s\n", arg, strerror(errno));
					return (-1);
				}

				res = stat(opt->mp, &st);
				if (res == -1) {
					fprintf(stderr, "fuse: bad mount point "
					    "%s : %s\n", arg, strerror(errno));
					return (-1);
				}

				if (!S_ISDIR(st.st_mode)) {
					fprintf(stderr, "fuse: bad mount point "
					    "%s : %s\n", arg,
					    strerror(ENOTDIR));
					return (-1);
				}
			} else {
				fprintf(stderr, "fuse: invalid argument %s\n",
				    arg);
				return (-1);
			}
			break;
		default:
			fprintf(stderr, "fuse: unknown option %s\n", arg);
			return (-1);
	}
	return (0);
}

int
fuse_parse_cmdline(struct fuse_args *args, char **mp, int *mt, unused int *fg)
{
	struct fuse_core_opt opt;

#ifdef DEBUG
	ifuse_debug_init();
#endif
	bzero(&opt, sizeof(opt));
	if (fuse_opt_parse(args, &opt, fuse_core_opts, ifuse_process_opt) == -1)
		return (-1);

	if (opt.mp == NULL) {
		fprintf(stderr, "fuse: missing mountpoint parameter\n");
		return (-1);
	}

	*mp = strdup(opt.mp);
	if (*mp == NULL)
		return (-1);
	*mt = 0;

	return (0);
}

struct fuse_context *
fuse_get_context(void)
{
	return (ictx);
}

int
fuse_version(void)
{
	return (FUSE_VERSION);
}

void
fuse_teardown(struct fuse *fuse, char *mp)
{
	fuse_unmount(mp, fuse->fc);
	fuse_destroy(fuse);
}

int
fuse_invalidate(unused struct fuse *f, unused const char *path)
{
	return (EINVAL);
}

struct fuse *
fuse_setup(int argc, char **argv, const struct fuse_operations *ops,
    size_t size, char **mp, int *mt, void *data)
{
	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
	struct fuse_chan *fc;
	struct fuse *fuse;
	int fg;

	if (fuse_parse_cmdline(&args, mp, mt, &fg))
		goto err;

	fuse_daemonize(0);

	if ((fc = fuse_mount(*mp, NULL)) == NULL)
		goto err;

	if ((fuse = fuse_new(fc, NULL, ops, size, data)) == NULL) {
		free(fc);
		goto err;
	}

	return (fuse);
err:
	free(*mp);
	return (NULL);
}

int
fuse_main(int argc, char **argv, const struct fuse_operations *ops, void *data)
{
	struct fuse *fuse;
	char *mp = NULL;
	int mt;

	fuse = fuse_setup(argc, argv, ops, sizeof(*ops), &mp, &mt, data);
	if (!fuse)
		return (-1);

	return (fuse_loop(fuse));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: fuse.c,v 1.29 2017/08/21 21:41:13 deraadt Exp $ */
2			/*
3			* Copyright (c) 2013 Sylvestre Gallon <ccna.syl@gmail.com>
4			*
5			* Permission to use, copy, modify, and distribute this software for any
6			* purpose with or without fee is hereby granted, provided that the above
7			* copyright notice and this permission notice appear in all copies.
8			*
9			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16			*/
17
18			#include <sys/wait.h>
19			#include <sys/types.h>
20			#include <sys/ioctl.h>
21
22			#include <miscfs/fuse/fusefs.h>
23
24			#include <errno.h>
25			#include <signal.h>
26			#include <stdlib.h>
27			#include <string.h>
28			#include <unistd.h>
29
30			#include "fuse_opt.h"
31			#include "fuse_private.h"
32			#include "debug.h"
33
34			static struct fuse_session *sigse;
35			static struct fuse_context *ictx = NULL;
36			static int max_read = FUSEBUFMAXSIZE;
37
38			enum {
39			KEY_HELP,
40			KEY_HELP_WITHOUT_HEADER,
41			KEY_VERSION,
42			KEY_MAXREAD,
43			KEY_STUB
44			};
45
46			static struct fuse_opt fuse_core_opts[] = {
47			FUSE_OPT_KEY("-h", KEY_HELP),
48			FUSE_OPT_KEY("--help", KEY_HELP),
49			FUSE_OPT_KEY("-ho", KEY_HELP_WITHOUT_HEADER),
50			FUSE_OPT_KEY("-V", KEY_VERSION),
51			FUSE_OPT_KEY("--version", KEY_VERSION),
52			FUSE_OPT_KEY("max_read=", KEY_MAXREAD),
53			FUSE_OPT_KEY("debug", KEY_STUB),
54			FUSE_OPT_KEY("-d", KEY_STUB),
55			FUSE_OPT_KEY("-f", KEY_STUB),
56			FUSE_OPT_KEY("-s", KEY_STUB),
57			FUSE_OPT_KEY("use_ino", KEY_STUB),
58			FUSE_OPT_KEY("big_writes", KEY_STUB),
59			FUSE_OPT_KEY("default_permissions", KEY_STUB),
60			FUSE_OPT_KEY("fsname=", KEY_STUB),
61			FUSE_OPT_END
62			};
63
64			int
65			fuse_loop(struct fuse *fuse)
66			{
67			struct fusebuf fbuf;
68			struct fuse_context ctx;
69			struct fb_ioctl_xch ioexch;
70			struct kevent ev;
71			ssize_t n;
72			int ret;
73
74			fuse->fc->kq = kqueue();
75			if (fuse->fc->kq == -1)
76			return (-1);
77
78			EV_SET(&fuse->fc->event, fuse->fc->fd, EVFILT_READ, EV_ADD \|
79			EV_ENABLE, 0, 0, 0);
80
81			while (!fuse->fc->dead) {
82			ret = kevent(fuse->fc->kq, &fuse->fc->event, 1, &ev, 1, NULL);
83			if (ret == -1)
84			DPERROR(__func__);
85			else if (ret > 0) {
86			n = read(fuse->fc->fd, &fbuf, sizeof(fbuf));
87			if (n != sizeof(fbuf)) {
88			fprintf(stderr, "%s: bad fusebuf read\n",
89			__func__);
90			return (-1);
91			}
92
93			/* check if there is data something present */
94			if (fbuf.fb_len) {
95			fbuf.fb_dat = malloc(fbuf.fb_len);
96			if (fbuf.fb_dat == NULL)
97			return (-1);
98			ioexch.fbxch_uuid = fbuf.fb_uuid;
99			ioexch.fbxch_len = fbuf.fb_len;
100			ioexch.fbxch_data = fbuf.fb_dat;
101
102			if (ioctl(fuse->fc->fd, FIOCGETFBDAT,
103			&ioexch)) {
104			free(fbuf.fb_dat);
105			return (-1);
106			}
107			}
108
109			ctx.fuse = fuse;
110			ctx.uid = fuse->conf.uid;
111			ctx.gid = fuse->conf.gid;
112			ctx.pid = fuse->conf.pid;
113			ctx.umask = fuse->conf.umask;
114			ctx.private_data = fuse->private_data;
115			ictx = &ctx;
116
117			ret = ifuse_exec_opcode(fuse, &fbuf);
118			if (ret) {
119			ictx = NULL;
120			return (-1);
121			}
122
123			n = write(fuse->fc->fd, &fbuf, sizeof(fbuf));
124			if (fbuf.fb_len) {
125			if (fbuf.fb_dat == NULL) {
126			fprintf(stderr, "%s: fb_dat is Null\n",
127			__func__);
128			return (-1);
129			}
130			ioexch.fbxch_uuid = fbuf.fb_uuid;
131			ioexch.fbxch_len = fbuf.fb_len;
132			ioexch.fbxch_data = fbuf.fb_dat;
133
134			if (ioctl(fuse->fc->fd, FIOCSETFBDAT, &ioexch)) {
135			free(fbuf.fb_dat);
136			return (-1);
137			}
138			free(fbuf.fb_dat);
139			}
140			ictx = NULL;
141
142			if (n != FUSEBUFSIZE) {
143			errno = EINVAL;
144			return (-1);
145			}
146			}
147			}
148
149			return (0);
150			}
151
152			struct fuse_chan *
153			fuse_mount(const char dir, unused struct fuse_args args)
154			{
155			struct fusefs_args fargs;
156			struct fuse_chan *fc;
157			const char *errcause;
158
159			fc = calloc(1, sizeof(*fc));
160			if (fc == NULL)
161			return (NULL);
162
163			fc->dir = realpath(dir, NULL);
164			if (fc->dir == NULL)
165			goto bad;
166
167			if ((fc->fd = open("/dev/fuse0", O_RDWR)) == -1) {
168			perror(__func__);
169			goto bad;
170			}
171
172			fargs.fd = fc->fd;
173			fargs.max_read = max_read;
174			if (mount(MOUNT_FUSEFS, fc->dir, 0, &fargs)) {
175			switch (errno) {
176			case EMFILE:
177			errcause = "mount table full";
178			break;
179			case EOPNOTSUPP:
180			errcause = "filesystem not supported by kernel";
181			break;
182			default:
183			errcause = strerror(errno);
184			break;
185			}
186			fprintf(stderr, "%s on %s: %s\n", __func__, dir, errcause);
187			goto bad;
188			}
189
190			return (fc);
191			bad:
192			if (fc->fd != -1)
193			close(fc->fd);
194			free(fc->dir);
195			free(fc);
196			return (NULL);
197			}
198
199			void
200			fuse_unmount(const char dir, unused struct fuse_chan ch)
201			{
202			if (ch->dead)
203			return;
204
205			if (unmount(dir, MNT_UPDATE) == -1)
206			DPERROR(__func__);
207			}
208
209			int
210			fuse_is_lib_option(unused const char *opt)
211			{
212			return (fuse_opt_match(fuse_core_opts, opt));
213			}
214
215			int
216			fuse_chan_fd(struct fuse_chan *ch)
217			{
218			return (ch->fd);
219			}
220
221			struct fuse_session *
222			fuse_get_session(struct fuse *f)
223			{
224			return (&f->se);
225			}
226
227			int
228			fuse_loop_mt(unused struct fuse *fuse)
229			{
230			return (0);
231			}
232
233			struct fuse *
234			fuse_new(struct fuse_chan fc, unused struct fuse_args args,
235			const struct fuse_operations *ops, unused size_t size,
236			unused void *userdata)
237			{
238			struct fuse *fuse;
239			struct fuse_vnode *root;
240
241			if ((fuse = calloc(1, sizeof(*fuse))) == NULL)
242			return (NULL);
243
244			/* copy fuse ops to their own structure */
245			memcpy(&fuse->op, ops, sizeof(fuse->op));
246
247			fuse->fc = fc;
248			fuse->max_ino = FUSE_ROOT_INO;
249			fuse->se.args = fuse;
250			fuse->private_data = userdata;
251
252			if ((root = alloc_vn(fuse, "/", FUSE_ROOT_INO, 0)) == NULL) {
253			free(fuse);
254			return (NULL);
255			}
256
257			tree_init(&fuse->vnode_tree);
258			tree_init(&fuse->name_tree);
259			if (!set_vn(fuse, root)) {
260			free(fuse);
261			return (NULL);
262			}
263
264			return (fuse);
265			}
266
267			int
268			fuse_daemonize(unused int foreground)
269			{
270			#ifdef DEBUG
271			return (daemon(0,1));
272			#else
273			return (daemon(0,0));
274			#endif
275			}
276
277			void
278			fuse_destroy(unused struct fuse *f)
279			{
280			close(f->fc->fd);
281			free(f->fc->dir);
282			free(f->fc);
283			free(f);
284			}
285
286			static void
287			ifuse_get_signal(unused int num)
288			{
289			struct fuse *f;
290			pid_t child;
291			int status;
292
293			if (sigse != NULL) {
294			child = fork();
295
296			if (child < 0)
297			return;
298
299			f = sigse->args;
300			if (child == 0) {
301			fuse_unmount(f->fc->dir, f->fc);
302			sigse = NULL;
303			exit(0);
304			}
305
306			fuse_loop(f);
307			while (waitpid(child, &status, 0) == -1) {
308			if (errno != EINTR)
309			break;
310			}
311			}
312			}
313
314			void
315			fuse_remove_signal_handlers(unused struct fuse_session *se)
316			{
317			sigse = NULL;
318			signal(SIGHUP, SIG_DFL);
319			signal(SIGINT, SIG_DFL);
320			signal(SIGTERM, SIG_DFL);
321			signal(SIGPIPE, SIG_DFL);
322			}
323
324			int
325			fuse_set_signal_handlers(unused struct fuse_session *se)
326			{
327			sigse = se;
328			signal(SIGHUP, ifuse_get_signal);
329			signal(SIGINT, ifuse_get_signal);
330			signal(SIGTERM, ifuse_get_signal);
331			signal(SIGPIPE, SIG_IGN);
332			return (0);
333			}
334
335			static void
336			dump_help(void)
337			{
338			fprintf(stderr, "FUSE options:\n"
339			" -d -o debug enable debug output (implies -f)\n"
340			" -V print fuse version\n"
341			"\n");
342			}
343
344			static void
345			dump_version(void)
346			{
347			fprintf(stderr, "FUSE library version %i\n", FUSE_USE_VERSION);
348			}
349
350			static int
351			ifuse_process_opt(void data, const char arg, int key,
352			unused struct fuse_args *args)
353			{
354			struct fuse_core_opt *opt = data;
355			struct stat st;
356			const char *err;
357			int res;
358
359			switch (key) {
360			case KEY_STUB:
361			return (0);
362			case KEY_HELP:
363			case KEY_HELP_WITHOUT_HEADER:
364			dump_help();
365			return (-1);
366			case KEY_VERSION:
367			dump_version();
368			return (-1);
369			case KEY_MAXREAD:
370			res = strtonum(arg, 0, FUSEBUFMAXSIZE, &err);
371			if (err) {
372			fprintf(stderr, "fuse: max_read %s\n", err);
373			return (-1);
374			}
375			max_read = res;
376			break;
377			case FUSE_OPT_KEY_NONOPT:
378			if (opt->mp == NULL) {
379			opt->mp = realpath(arg, opt->mp);
380			if (opt->mp == NULL) {
381			fprintf(stderr, "fuse: realpath: "
382			"%s : %s\n", arg, strerror(errno));
383			return (-1);
384			}
385
386			res = stat(opt->mp, &st);
387			if (res == -1) {
388			fprintf(stderr, "fuse: bad mount point "
389			"%s : %s\n", arg, strerror(errno));
390			return (-1);
391			}
392
393			if (!S_ISDIR(st.st_mode)) {
394			fprintf(stderr, "fuse: bad mount point "
395			"%s : %s\n", arg,
396			strerror(ENOTDIR));
397			return (-1);
398			}
399			} else {
400			fprintf(stderr, "fuse: invalid argument %s\n",
401			arg);
402			return (-1);
403			}
404			break;
405			default:
406			fprintf(stderr, "fuse: unknown option %s\n", arg);
407			return (-1);
408			}
409			return (0);
410			}
411
412			int
413			fuse_parse_cmdline(struct fuse_args args, char mp, int mt, unused int *fg)
414			{
415			struct fuse_core_opt opt;
416
417			#ifdef DEBUG
418			ifuse_debug_init();
419			#endif
420			bzero(&opt, sizeof(opt));
421			if (fuse_opt_parse(args, &opt, fuse_core_opts, ifuse_process_opt) == -1)
422			return (-1);
423
424			if (opt.mp == NULL) {
425			fprintf(stderr, "fuse: missing mountpoint parameter\n");
426			return (-1);
427			}
428
429			*mp = strdup(opt.mp);
430			if (*mp == NULL)
431			return (-1);
432			*mt = 0;
433
434			return (0);
435			}
436
437			struct fuse_context *
438			fuse_get_context(void)
439			{
440			return (ictx);
441			}
442
443			int
444			fuse_version(void)
445			{
446			return (FUSE_VERSION);
447			}
448
449			void
450			fuse_teardown(struct fuse fuse, char mp)
451			{
452			fuse_unmount(mp, fuse->fc);
453			fuse_destroy(fuse);
454			}
455
456			int
457			fuse_invalidate(unused struct fuse f, unused const char path)
458			{
459			return (EINVAL);
460			}
461
462			struct fuse *
463			fuse_setup(int argc, char *argv, const struct fuse_operations ops,
464			size_t size, char *mp, int mt, void *data)
465			{
466			struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
467			struct fuse_chan *fc;
468			struct fuse *fuse;
469			int fg;
470
471			if (fuse_parse_cmdline(&args, mp, mt, &fg))
472			goto err;
473
474			fuse_daemonize(0);
475
476			if ((fc = fuse_mount(*mp, NULL)) == NULL)
477			goto err;
478
479			if ((fuse = fuse_new(fc, NULL, ops, size, data)) == NULL) {
480			free(fc);
481			goto err;
482			}
483
484			return (fuse);
485			err:
486			free(*mp);
487			return (NULL);
488			}
489
490			int
491			fuse_main(int argc, char *argv, const struct fuse_operations ops, void *data)
492			{
493			struct fuse *fuse;
494			char *mp = NULL;
495			int mt;
496
497			fuse = fuse_setup(argc, argv, ops, sizeof(*ops), &mp, &mt, data);
498			if (!fuse)
499			return (-1);
500
501			return (fuse_loop(fuse));
502			}