13 #include "mount_util.h" 27 #include <sys/mount.h> 28 #include <sys/fsuid.h> 29 #include <sys/socket.h> 30 #include <sys/utsname.h> 35 #define FUSE_COMMFD_ENV "_FUSE_COMMFD" 37 #define FUSE_DEV "/dev/fuse" 40 #define MS_DIRSYNC 128 46 #define MS_PRIVATE (1<<18) 50 #define UMOUNT_DETACH 0x00000002 52 #ifndef UMOUNT_NOFOLLOW 53 #define UMOUNT_NOFOLLOW 0x00000008 56 #define UMOUNT_UNUSED 0x80000000 59 static const char *progname;
61 static int user_allow_other = 0;
62 static int mount_max = 1000;
64 static int auto_unmount = 0;
66 static const char *get_user_name(
void)
68 struct passwd *pw = getpwuid(getuid());
69 if (pw != NULL && pw->pw_name != NULL)
72 fprintf(stderr,
"%s: could not determine username\n", progname);
77 static uid_t oldfsuid;
78 static gid_t oldfsgid;
80 static void drop_privs(
void)
83 oldfsuid = setfsuid(getuid());
84 oldfsgid = setfsgid(getgid());
88 static void restore_privs(
void)
100 static int lock_umount(
void)
102 const char *mtab_lock = _PATH_MOUNTED
".fuselock";
105 struct stat mtab_stat;
108 if (lstat(_PATH_MOUNTED, &mtab_stat) == 0 && S_ISLNK(mtab_stat.st_mode))
111 mtablock = open(mtab_lock, O_RDWR | O_CREAT, 0600);
112 if (mtablock == -1) {
113 fprintf(stderr,
"%s: unable to open fuse lock file: %s\n",
114 progname, strerror(errno));
117 res = lockf(mtablock, F_LOCK, 0);
119 fprintf(stderr,
"%s: error getting lock: %s\n", progname,
128 static void unlock_umount(
int mtablock)
133 res = lockf(mtablock, F_ULOCK, 0);
135 fprintf(stderr,
"%s: error releasing lock: %s\n",
136 progname, strerror(errno));
142 static int add_mount(
const char *source,
const char *mnt,
const char *type,
145 return fuse_mnt_add_mount(progname, source, mnt, type, opts);
148 static int may_unmount(
const char *mnt,
int quiet)
152 const char *user = NULL;
156 const char *mtab = _PATH_MOUNTED;
158 user = get_user_name();
162 fp = setmntent(mtab,
"r");
164 fprintf(stderr,
"%s: failed to open %s: %s\n", progname, mtab,
169 uidlen = sprintf(uidstr,
"%u", getuid());
172 while ((entp = getmntent(fp)) != NULL) {
173 if (!found && strcmp(entp->mnt_dir, mnt) == 0 &&
174 (strcmp(entp->mnt_type,
"fuse") == 0 ||
175 strcmp(entp->mnt_type,
"fuseblk") == 0 ||
176 strncmp(entp->mnt_type,
"fuse.", 5) == 0 ||
177 strncmp(entp->mnt_type,
"fuseblk.", 8) == 0)) {
178 char *p = strstr(entp->mnt_opts,
"user=");
180 (p == entp->mnt_opts || *(p-1) ==
',') &&
181 strcmp(p + 5, user) == 0) {
188 strstr(entp->mnt_opts,
"user_id=")) &&
189 (p == entp->mnt_opts ||
191 strncmp(p + 8, uidstr, uidlen) == 0 &&
192 (*(p+8+uidlen) ==
',' ||
193 *(p+8+uidlen) ==
'\0')) {
204 "%s: entry for %s not found in %s\n",
205 progname, mnt, mtab);
235 static int check_is_mount_child(
void *p)
238 const char *last = a[0];
239 const char *mnt = a[1];
241 const char *procmounts =
"/proc/mounts";
247 res = mount(
"",
"/",
"", MS_PRIVATE | MS_REC, NULL);
249 fprintf(stderr,
"%s: failed to mark mounts private: %s\n",
250 progname, strerror(errno));
254 fp = setmntent(procmounts,
"r");
256 fprintf(stderr,
"%s: failed to open %s: %s\n", progname,
257 procmounts, strerror(errno));
262 while (getmntent(fp) != NULL)
266 fp = setmntent(procmounts,
"r");
268 fprintf(stderr,
"%s: failed to open %s: %s\n", progname,
269 procmounts, strerror(errno));
273 res = mount(
".",
"/",
"", MS_BIND | MS_REC, NULL);
275 fprintf(stderr,
"%s: failed to bind parent to /: %s\n",
276 progname, strerror(errno));
281 while ((entp = getmntent(fp)) != NULL) {
286 if (entp->mnt_dir[0] ==
'/' &&
287 strcmp(entp->mnt_dir + 1, last) == 0) {
295 fprintf(stderr,
"%s: %s not mounted\n", progname, mnt);
302 static pid_t clone_newns(
void *a)
305 char *stack = buf + (
sizeof(buf) / 2 - ((
size_t) buf & 15));
308 extern int __clone2(
int (*fn)(
void *),
309 void *child_stack_base,
size_t stack_size,
310 int flags,
void *arg, pid_t *ptid,
311 void *tls, pid_t *ctid);
313 return __clone2(check_is_mount_child, stack,
sizeof(buf) / 2,
314 CLONE_NEWNS, a, NULL, NULL, NULL);
316 return clone(check_is_mount_child, stack, CLONE_NEWNS, a);
320 static int check_is_mount(
const char *last,
const char *mnt)
324 const char *a[2] = { last, mnt };
326 pid = clone_newns((
void *) a);
327 if (pid == (pid_t) -1) {
328 fprintf(stderr,
"%s: failed to clone namespace: %s\n",
329 progname, strerror(errno));
332 p = waitpid(pid, &status, __WCLONE);
333 if (p == (pid_t) -1) {
334 fprintf(stderr,
"%s: waitpid failed: %s\n",
335 progname, strerror(errno));
338 if (!WIFEXITED(status)) {
339 fprintf(stderr,
"%s: child terminated abnormally (status %i)\n",
343 if (WEXITSTATUS(status) != 0)
349 static int chdir_to_parent(
char *copy,
const char **lastp)
356 tmp = strrchr(copy,
'/');
357 if (tmp == NULL || tmp[1] ==
'\0') {
358 fprintf(stderr,
"%s: internal error: invalid abs path: <%s>\n",
366 }
else if (tmp[1] !=
'\0') {
376 fprintf(stderr,
"%s: failed to chdir to %s: %s\n",
377 progname, parent, strerror(errno));
381 if (getcwd(buf,
sizeof(buf)) == NULL) {
382 fprintf(stderr,
"%s: failed to obtain current directory: %s\n",
383 progname, strerror(errno));
386 if (strcmp(buf, parent) != 0) {
387 fprintf(stderr,
"%s: mountpoint moved (%s -> %s)\n", progname,
397 static int umount_nofollow_support(
void)
399 int res = umount2(
"", UMOUNT_UNUSED);
400 if (res != -1 || errno != EINVAL)
403 res = umount2(
"", UMOUNT_NOFOLLOW);
404 if (res != -1 || errno != ENOENT)
410 static int unmount_fuse_locked(
const char *mnt,
int quiet,
int lazy)
415 int umount_flags = lazy ? UMOUNT_DETACH : 0;
418 res = may_unmount(mnt, quiet);
425 fprintf(stderr,
"%s: failed to allocate memory\n", progname);
429 res = chdir_to_parent(copy, &last);
433 if (umount_nofollow_support()) {
434 umount_flags |= UMOUNT_NOFOLLOW;
436 res = check_is_mount(last, mnt);
441 res = umount2(last, umount_flags);
442 if (res == -1 && !quiet) {
443 fprintf(stderr,
"%s: failed to unmount %s: %s\n",
444 progname, mnt, strerror(errno));
454 fprintf(stderr,
"%s: failed to chdir to '/'\n", progname);
458 return fuse_mnt_remove_mount(progname, mnt);
461 static int unmount_fuse(
const char *mnt,
int quiet,
int lazy)
464 int mtablock = lock_umount();
466 res = unmount_fuse_locked(mnt, quiet, lazy);
467 unlock_umount(mtablock);
472 static int count_fuse_fs(
void)
476 const char *mtab = _PATH_MOUNTED;
477 FILE *fp = setmntent(mtab,
"r");
479 fprintf(stderr,
"%s: failed to open %s: %s\n", progname, mtab,
483 while ((entp = getmntent(fp)) != NULL) {
484 if (strcmp(entp->mnt_type,
"fuse") == 0 ||
485 strncmp(entp->mnt_type,
"fuse.", 5) == 0)
494 static int count_fuse_fs(
void)
499 static int add_mount(
const char *source,
const char *mnt,
const char *type,
509 static int unmount_fuse(
const char *mnt,
int quiet,
int lazy)
512 return fuse_mnt_umount(progname, mnt, mnt, lazy);
516 static void strip_line(
char *line)
518 char *s = strchr(line,
'#');
521 for (s = line + strlen(line) - 1;
522 s >= line && isspace((
unsigned char) *s); s--);
524 for (s = line; isspace((
unsigned char) *s); s++);
526 memmove(line, s, strlen(s)+1);
529 static void parse_line(
char *line,
int linenum)
532 if (strcmp(line,
"user_allow_other") == 0)
533 user_allow_other = 1;
534 else if (sscanf(line,
"mount_max = %i", &tmp) == 1)
538 "%s: unknown parameter in %s at line %i: '%s'\n",
539 progname, FUSE_CONF, linenum, line);
542 static void read_conf(
void)
544 FILE *fp = fopen(FUSE_CONF,
"r");
549 while (fgets(line,
sizeof(line), fp) != NULL) {
551 if (line[strlen(line)-1] ==
'\n') {
553 parse_line(line, linenum);
557 }
else if(line[strlen(line)-1] ==
'\n') {
558 fprintf(stderr,
"%s: reading %s: line %i too long\n", progname, FUSE_CONF, linenum);
566 fprintf(stderr,
"%s: reading %s: missing newline at end of file\n", progname, FUSE_CONF);
570 fprintf(stderr,
"%s: reading %s: read failed\n", progname, FUSE_CONF);
574 }
else if (errno != ENOENT) {
575 bool fatal = (errno != EACCES && errno != ELOOP &&
576 errno != ENAMETOOLONG && errno != ENOTDIR &&
578 fprintf(stderr,
"%s: failed to open %s: %s\n",
579 progname, FUSE_CONF, strerror(errno));
585 static int begins_with(
const char *s,
const char *beg)
587 if (strncmp(s, beg, strlen(beg)) == 0)
600 static struct mount_flags mount_flags[] = {
601 {
"rw", MS_RDONLY, 0, 1},
602 {
"ro", MS_RDONLY, 1, 1},
603 {
"suid", MS_NOSUID, 0, 0},
604 {
"nosuid", MS_NOSUID, 1, 1},
605 {
"dev", MS_NODEV, 0, 0},
606 {
"nodev", MS_NODEV, 1, 1},
607 {
"exec", MS_NOEXEC, 0, 1},
608 {
"noexec", MS_NOEXEC, 1, 1},
609 {
"async", MS_SYNCHRONOUS, 0, 1},
610 {
"sync", MS_SYNCHRONOUS, 1, 1},
611 {
"atime", MS_NOATIME, 0, 1},
612 {
"noatime", MS_NOATIME, 1, 1},
613 {
"dirsync", MS_DIRSYNC, 1, 1},
617 static int find_mount_flag(
const char *s,
unsigned len,
int *on,
int *flag)
621 for (i = 0; mount_flags[i].opt != NULL; i++) {
622 const char *opt = mount_flags[i].opt;
623 if (strlen(opt) == len && strncmp(opt, s, len) == 0) {
624 *on = mount_flags[i].on;
625 *flag = mount_flags[i].flag;
626 if (!mount_flags[i].safe && getuid() != 0) {
629 "%s: unsafe option %s ignored\n",
638 static int add_option(
char **optsp,
const char *opt,
unsigned expand)
642 newopts = strdup(opt);
644 unsigned oldsize = strlen(*optsp);
645 unsigned newsize = oldsize + 1 + strlen(opt) + expand + 1;
646 newopts = (
char *) realloc(*optsp, newsize);
648 sprintf(newopts + oldsize,
",%s", opt);
650 if (newopts == NULL) {
651 fprintf(stderr,
"%s: failed to allocate memory\n", progname);
658 static int get_mnt_opts(
int flags,
char *opts,
char **mnt_optsp)
663 if (!(flags & MS_RDONLY) && add_option(mnt_optsp,
"rw", 0) == -1)
666 for (i = 0; mount_flags[i].opt != NULL; i++) {
667 if (mount_flags[i].on && (flags & mount_flags[i].flag) &&
668 add_option(mnt_optsp, mount_flags[i].opt, 0) == -1)
672 if (add_option(mnt_optsp, opts, 0) == -1)
675 l = strlen(*mnt_optsp);
676 if ((*mnt_optsp)[l-1] ==
',')
677 (*mnt_optsp)[l-1] =
'\0';
679 const char *user = get_user_name();
683 if (add_option(mnt_optsp,
"user=", strlen(user)) == -1)
685 strcat(*mnt_optsp, user);
690 static int opt_eq(
const char *s,
unsigned len,
const char *opt)
692 if(strlen(opt) == len && strncmp(s, opt, len) == 0)
698 static int get_string_opt(
const char *s,
unsigned len,
const char *opt,
702 unsigned opt_len = strlen(opt);
707 *val = (
char *) malloc(len - opt_len + 1);
709 fprintf(stderr,
"%s: failed to allocate memory\n", progname);
716 for (i = 0; i < len; i++) {
717 if (s[i] ==
'\\' && i + 1 < len)
730 static int mount_notrunc(
const char *source,
const char *target,
731 const char *filesystemtype,
unsigned long mountflags,
733 if (strlen(data) > sysconf(_SC_PAGESIZE) - 1) {
734 fprintf(stderr,
"%s: mount options too long\n", progname);
738 return mount(source, target, filesystemtype, mountflags, data);
742 static int do_mount(
const char *mnt,
char **typep, mode_t rootmode,
743 int fd,
const char *opts,
const char *dev,
char **sourcep,
747 int flags = MS_NOSUID | MS_NODEV;
749 char *mnt_opts = NULL;
753 char *subtype = NULL;
758 optbuf = (
char *) malloc(strlen(opts) + 128);
760 fprintf(stderr,
"%s: failed to allocate memory\n", progname);
764 for (s = opts, d = optbuf; *s;) {
766 const char *fsname_str =
"fsname=";
767 const char *subtype_str =
"subtype=";
768 bool escape_ok = begins_with(s, fsname_str) ||
769 begins_with(s, subtype_str);
770 for (len = 0; s[len]; len++) {
771 if (escape_ok && s[len] ==
'\\' && s[len + 1])
773 else if (s[len] ==
',')
776 if (begins_with(s, fsname_str)) {
777 if (!get_string_opt(s, len, fsname_str, &fsname))
779 }
else if (begins_with(s, subtype_str)) {
780 if (!get_string_opt(s, len, subtype_str, &subtype))
782 }
else if (opt_eq(s, len,
"blkdev")) {
785 "%s: option blkdev is privileged\n",
790 }
else if (opt_eq(s, len,
"auto_unmount")) {
792 }
else if (!begins_with(s,
"fd=") &&
793 !begins_with(s,
"rootmode=") &&
794 !begins_with(s,
"user_id=") &&
795 !begins_with(s,
"group_id=")) {
799 if (opt_eq(s, len,
"large_read")) {
800 struct utsname utsname;
802 res = uname(&utsname);
804 sscanf(utsname.release,
"%u.%u",
805 &kmaj, &kmin) == 2 &&
806 (kmaj > 2 || (kmaj == 2 && kmin > 4))) {
807 fprintf(stderr,
"%s: note: 'large_read' mount option is deprecated for %i.%i kernels\n", progname, kmaj, kmin);
811 if (getuid() != 0 && !user_allow_other &&
812 (opt_eq(s, len,
"allow_other") ||
813 opt_eq(s, len,
"allow_root"))) {
814 fprintf(stderr,
"%s: option %.*s only allowed if 'user_allow_other' is set in %s\n", progname, len, s, FUSE_CONF);
818 if (find_mount_flag(s, len, &on, &flag)) {
823 }
else if (opt_eq(s, len,
"default_permissions") ||
824 opt_eq(s, len,
"allow_other") ||
825 begins_with(s,
"max_read=") ||
826 begins_with(s,
"blksize=")) {
831 fprintf(stderr,
"%s: unknown option '%.*s'\n", progname, len, s);
841 res = get_mnt_opts(flags, optbuf, &mnt_opts);
845 sprintf(d,
"fd=%i,rootmode=%o,user_id=%u,group_id=%u",
846 fd, rootmode, getuid(), getgid());
848 source = malloc((fsname ? strlen(fsname) : 0) +
849 (subtype ? strlen(subtype) : 0) + strlen(dev) + 32);
851 type = malloc((subtype ? strlen(subtype) : 0) + 32);
852 if (!type || !source) {
853 fprintf(stderr,
"%s: failed to allocate memory\n", progname);
858 sprintf(type,
"%s.%s", blkdev ?
"fuseblk" :
"fuse", subtype);
860 strcpy(type, blkdev ?
"fuseblk" :
"fuse");
863 strcpy(source, fsname);
865 strcpy(source, subtype ? subtype : dev);
867 res = mount_notrunc(source, mnt, type, flags, optbuf);
868 if (res == -1 && errno == ENODEV && subtype) {
870 strcpy(type, blkdev ?
"fuseblk" :
"fuse");
873 sprintf(source,
"%s#%s", subtype, fsname);
875 strcpy(source, type);
878 res = mount_notrunc(source, mnt, type, flags, optbuf);
880 if (res == -1 && errno == EINVAL) {
882 sprintf(d,
"fd=%i,rootmode=%o,user_id=%u",
883 fd, rootmode, getuid());
884 res = mount_notrunc(source, mnt, type, flags, optbuf);
887 int errno_save = errno;
888 if (blkdev && errno == ENODEV && !fuse_mnt_check_fuseblk())
889 fprintf(stderr,
"%s: 'fuseblk' support missing\n",
892 fprintf(stderr,
"%s: mount failed: %s\n", progname,
893 strerror(errno_save));
898 *mnt_optsp = mnt_opts;
914 static int check_perm(
const char **mntp,
struct stat *stbuf,
int *mountpoint_fd)
917 const char *mnt = *mntp;
918 const char *origmnt = mnt;
919 struct statfs fs_buf;
922 res = lstat(mnt, stbuf);
924 fprintf(stderr,
"%s: failed to access mountpoint %s: %s\n",
925 progname, mnt, strerror(errno));
933 if (S_ISDIR(stbuf->st_mode)) {
937 "%s: failed to chdir to mountpoint: %s\n",
938 progname, strerror(errno));
942 res = lstat(mnt, stbuf);
945 "%s: failed to access mountpoint %s: %s\n",
946 progname, origmnt, strerror(errno));
950 if ((stbuf->st_mode & S_ISVTX) && stbuf->st_uid != getuid()) {
951 fprintf(stderr,
"%s: mountpoint %s not owned by user\n",
956 res = access(mnt, W_OK);
958 fprintf(stderr,
"%s: user has no write access to mountpoint %s\n",
962 }
else if (S_ISREG(stbuf->st_mode)) {
963 static char procfile[256];
964 *mountpoint_fd = open(mnt, O_WRONLY);
965 if (*mountpoint_fd == -1) {
966 fprintf(stderr,
"%s: failed to open %s: %s\n",
967 progname, mnt, strerror(errno));
970 res = fstat(*mountpoint_fd, stbuf);
973 "%s: failed to access mountpoint %s: %s\n",
974 progname, mnt, strerror(errno));
977 if (!S_ISREG(stbuf->st_mode)) {
979 "%s: mountpoint %s is no longer a regular file\n",
984 sprintf(procfile,
"/proc/self/fd/%i", *mountpoint_fd);
988 "%s: mountpoint %s is not a directory or a regular file\n",
999 if (statfs(*mntp, &fs_buf)) {
1000 fprintf(stderr,
"%s: failed to access mountpoint %s: %s\n",
1001 progname, mnt, strerror(errno));
1010 typeof(fs_buf.f_type) f_type_whitelist[] = {
1037 for (i = 0; i <
sizeof(f_type_whitelist)/
sizeof(f_type_whitelist[0]); i++) {
1038 if (f_type_whitelist[i] == fs_buf.f_type)
1042 fprintf(stderr,
"%s: mounting over filesystem type %#010lx is forbidden\n",
1043 progname, (
unsigned long)fs_buf.f_type);
1047 static int try_open(
const char *dev,
char **devp,
int silent)
1049 int fd = open(dev, O_RDWR);
1051 *devp = strdup(dev);
1052 if (*devp == NULL) {
1053 fprintf(stderr,
"%s: failed to allocate memory\n",
1058 }
else if (errno == ENODEV ||
1062 fprintf(stderr,
"%s: failed to open %s: %s\n", progname, dev,
1068 static int try_open_fuse_device(
char **devp)
1073 fd = try_open(FUSE_DEV, devp, 0);
1078 static int open_fuse_device(
char **devp)
1080 int fd = try_open_fuse_device(devp);
1085 "%s: fuse device not found, try 'modprobe fuse' first\n",
1092 static int mount_fuse(
const char *mnt,
const char *opts)
1099 char *source = NULL;
1100 char *mnt_opts = NULL;
1101 const char *real_mnt = mnt;
1102 int mountpoint_fd = -1;
1104 fd = open_fuse_device(&dev);
1111 if (getuid() != 0 && mount_max != -1) {
1112 int mount_count = count_fuse_fs();
1113 if (mount_count >= mount_max) {
1114 fprintf(stderr,
"%s: too many FUSE filesystems mounted; mount_max=N can be set in %s\n", progname, FUSE_CONF);
1119 res = check_perm(&real_mnt, &stbuf, &mountpoint_fd);
1122 res = do_mount(real_mnt, &type, stbuf.st_mode & S_IFMT,
1123 fd, opts, dev, &source, &mnt_opts);
1125 if (mountpoint_fd != -1)
1126 close(mountpoint_fd);
1133 fprintf(stderr,
"%s: failed to chdir to '/'\n", progname);
1137 if (geteuid() == 0) {
1138 res = add_mount(source, mnt, type, mnt_opts);
1159 static int send_fd(
int sock_fd,
int fd)
1163 struct cmsghdr *p_cmsg;
1165 size_t cmsgbuf[CMSG_SPACE(
sizeof(fd)) /
sizeof(size_t)];
1169 msg.msg_control = cmsgbuf;
1170 msg.msg_controllen =
sizeof(cmsgbuf);
1171 p_cmsg = CMSG_FIRSTHDR(&msg);
1172 p_cmsg->cmsg_level = SOL_SOCKET;
1173 p_cmsg->cmsg_type = SCM_RIGHTS;
1174 p_cmsg->cmsg_len = CMSG_LEN(
sizeof(fd));
1175 p_fds = (
int *) CMSG_DATA(p_cmsg);
1177 msg.msg_controllen = p_cmsg->cmsg_len;
1178 msg.msg_name = NULL;
1179 msg.msg_namelen = 0;
1185 vec.iov_base = &sendchar;
1186 vec.iov_len =
sizeof(sendchar);
1187 while ((retval = sendmsg(sock_fd, &msg, 0)) == -1 && errno == EINTR);
1189 perror(
"sending file descriptor");
1195 static void usage(
void)
1197 printf(
"%s: [options] mountpoint\n" 1200 " -V print version\n" 1201 " -o opt[,opt...] mount options\n" 1204 " -z lazy unmount\n",
1209 static void show_version(
void)
1211 printf(
"fusermount3 version: %s\n", PACKAGE_VERSION);
1215 int main(
int argc,
char *argv[])
1223 static int unmount = 0;
1224 static int lazy = 0;
1225 static int quiet = 0;
1228 const char *opts =
"";
1230 static const struct option long_opts[] = {
1231 {
"unmount", no_argument, NULL,
'u'},
1232 {
"lazy", no_argument, NULL,
'z'},
1233 {
"quiet", no_argument, NULL,
'q'},
1234 {
"help", no_argument, NULL,
'h'},
1235 {
"version", no_argument, NULL,
'V'},
1238 progname = strdup(argv[0]);
1239 if (progname == NULL) {
1240 fprintf(stderr,
"%s: failed to allocate memory\n", argv[0]);
1244 while ((ch = getopt_long(argc, argv,
"hVo:uzq", long_opts,
1276 if (lazy && !unmount) {
1277 fprintf(stderr,
"%s: -z can only be used with -u\n", progname);
1281 if (optind >= argc) {
1282 fprintf(stderr,
"%s: missing mountpoint argument\n", progname);
1284 }
else if (argc > optind + 1) {
1285 fprintf(stderr,
"%s: extra arguments after the mountpoint\n",
1290 origmnt = argv[optind];
1293 mnt = fuse_mnt_resolve_path(progname, origmnt);
1297 fprintf(stderr,
"%s: failed to chdir to '/'\n", progname);
1309 commfd = getenv(FUSE_COMMFD_ENV);
1310 if (commfd == NULL) {
1311 fprintf(stderr,
"%s: old style mounting not supported\n",
1316 fd = mount_fuse(mnt, opts);
1321 res = send_fd(cfd, fd);
1326 if (!auto_unmount) {
1338 fprintf(stderr,
"%s: failed to chdir to '/'\n", progname);
1342 sigfillset(&sigset);
1343 sigprocmask(SIG_BLOCK, &sigset, NULL);
1349 unsigned char buf[16];
1350 int n = recv(cfd, buf,
sizeof(buf), 0);
1363 res = unmount_fuse(mnt, quiet, lazy);
1365 res = umount2(mnt, lazy ? UMOUNT_DETACH : 0);
1366 if (res == -1 && !quiet)
1368 "%s: failed to unmount %s: %s\n",
1369 progname, mnt, strerror(errno));