Index: head/sbin/mount_fusefs/mount_fusefs.c =================================================================== --- head/sbin/mount_fusefs/mount_fusefs.c (revision 352024) +++ head/sbin/mount_fusefs/mount_fusefs.c (revision 352025) @@ -1,494 +1,496 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2005 Jean-Sebastien Pedron * Copyright (c) 2005 Csaba Henk * All rights reserved. * * Copyright (c) 2019 The FreeBSD Foundation * * Portions of this software were developed by BFF Storage Systems under * sponsorship from the FreeBSD Foundation. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mntopts.h" #ifndef FUSE4BSD_VERSION #define FUSE4BSD_VERSION "0.3.9-pre1" #endif void __usage_short(void); void usage(void); void helpmsg(void); void showversion(void); static struct mntopt mopts[] = { #define ALTF_PRIVATE 0x01 { "private", 0, ALTF_PRIVATE, 1 }, { "neglect_shares", 0, 0x02, 1 }, { "push_symlinks_in", 0, 0x04, 1 }, { "allow_other", 0, 0x08, 1 }, { "default_permissions", 0, 0x10, 1 }, #define ALTF_MAXREAD 0x20 { "max_read=", 0, ALTF_MAXREAD, 1 }, #define ALTF_SUBTYPE 0x40 { "subtype=", 0, ALTF_SUBTYPE, 1 }, /* * MOPT_AUTOMOUNTED, included by MOPT_STDOPTS, does not fit into * the 'flags' argument to nmount(2). We have to abuse altflags * to pass it, as string, via iovec. */ #define ALTF_AUTOMOUNTED 0x100 { "automounted", 0, ALTF_AUTOMOUNTED, 1 }, #define ALTF_INTR 0x200 { "intr", 0, ALTF_INTR, 1 }, /* Linux specific options, we silently ignore them */ { "fsname=", 0, 0x00, 1 }, { "fd=", 0, 0x00, 1 }, { "rootmode=", 0, 0x00, 1 }, { "user_id=", 0, 0x00, 1 }, { "group_id=", 0, 0x00, 1 }, { "large_read", 0, 0x00, 1 }, /* "nonempty", just the first two chars are stripped off during parsing */ { "nempty", 0, 0x00, 1 }, { "async", 0, MNT_ASYNC, 0}, { "noasync", 1, MNT_ASYNC, 0}, MOPT_STDOPTS, MOPT_END }; struct mntval { int mv_flag; void *mv_value; int mv_len; }; static struct mntval mvals[] = { { ALTF_MAXREAD, NULL, 0 }, { ALTF_SUBTYPE, NULL, 0 }, { 0, NULL, 0 } }; #define DEFAULT_MOUNT_FLAGS ALTF_PRIVATE int main(int argc, char *argv[]) { struct iovec *iov; int mntflags, iovlen, verbose = 0; char *dev = NULL, *dir = NULL, mntpath[MAXPATHLEN]; char *devo = NULL, *diro = NULL; char ndev[128], fdstr[15]; int i, done = 0, reject_allow_other = 0, safe_level = 0; int altflags = DEFAULT_MOUNT_FLAGS; int __altflags = DEFAULT_MOUNT_FLAGS; int ch = 0; struct mntopt *mo; struct mntval *mv; static struct option longopts[] = { {"reject-allow_other", no_argument, NULL, 'A'}, {"safe", no_argument, NULL, 'S'}, {"daemon", required_argument, NULL, 'D'}, {"daemon_opts", required_argument, NULL, 'O'}, {"special", required_argument, NULL, 's'}, {"mountpath", required_argument, NULL, 'm'}, {"version", no_argument, NULL, 'V'}, {"help", no_argument, NULL, 'h'}, {0,0,0,0} }; int pid = 0; int fd = -1, fdx; char *ep; char *daemon_str = NULL, *daemon_opts = NULL; /* * We want a parsing routine which is not sensitive to * the position of args/opts; it should extract the * first two args and stop at the beginning of the rest. * (This makes it easier to call mount_fusefs from external * utils than it is with a strict "util flags args" syntax.) */ iov = NULL; iovlen = 0; mntflags = 0; /* All in all, I feel it more robust this way... */ unsetenv("POSIXLY_CORRECT"); if (getenv("MOUNT_FUSEFS_IGNORE_UNKNOWN")) getmnt_silent = 1; if (getenv("MOUNT_FUSEFS_VERBOSE")) verbose = 1; do { for (i = 0; i < 3; i++) { if (optind < argc && argv[optind][0] != '-') { if (dir) { done = 1; break; } if (dev) dir = argv[optind]; else dev = argv[optind]; optind++; } } switch(ch) { case 'A': reject_allow_other = 1; break; case 'S': safe_level = 1; break; case 'D': if (daemon_str) errx(1, "daemon specified inconsistently"); daemon_str = optarg; break; case 'O': if (daemon_opts) errx(1, "daemon opts specified inconsistently"); daemon_opts = optarg; break; case 'o': getmntopts(optarg, mopts, &mntflags, &altflags); for (mv = mvals; mv->mv_flag; ++mv) { if (! (altflags & mv->mv_flag)) continue; for (mo = mopts; mo->m_flag; ++mo) { char *p, *q; if (mo->m_flag != mv->mv_flag) continue; p = strstr(optarg, mo->m_option); if (p) { p += strlen(mo->m_option); q = p; while (*q != '\0' && *q != ',') q++; mv->mv_len = q - p + 1; mv->mv_value = malloc(mv->mv_len); + if (mv->mv_value == NULL) + err(1, "malloc"); memcpy(mv->mv_value, p, mv->mv_len - 1); ((char *)mv->mv_value)[mv->mv_len - 1] = '\0'; break; } } } break; case 's': if (devo) errx(1, "special specified inconsistently"); devo = optarg; break; case 'm': if (diro) errx(1, "mount path specified inconsistently"); diro = optarg; break; case 'v': verbose = 1; break; case 'h': helpmsg(); break; case 'V': showversion(); break; case '\0': break; case '?': default: usage(); } if (done) break; } while ((ch = getopt_long(argc, argv, "AvVho:SD:O:s:m:", longopts, NULL)) != -1); argc -= optind; argv += optind; if (devo) { if (dev) errx(1, "special specified inconsistently"); dev = devo; } else if (diro) errx(1, "if mountpoint is given via an option, special should also be given via an option"); if (diro) { if (dir) errx(1, "mount path specified inconsistently"); dir = diro; } if ((! dev) && argc > 0) { dev = *argv++; argc--; } if ((! dir) && argc > 0) { dir = *argv++; argc--; } if (! (dev && dir)) errx(1, "missing special and/or mountpoint"); for (mo = mopts; mo->m_flag; ++mo) { if (altflags & mo->m_flag) { int iov_done = 0; if (reject_allow_other && strcmp(mo->m_option, "allow_other") == 0) /* * reject_allow_other is stronger than a * negative of allow_other: if this is set, * allow_other is blocked, period. */ errx(1, "\"allow_other\" usage is banned by respective option"); for (mv = mvals; mv->mv_flag; ++mv) { if (mo->m_flag != mv->mv_flag) continue; if (mv->mv_value) { build_iovec(&iov, &iovlen, mo->m_option, mv->mv_value, mv->mv_len); iov_done = 1; break; } } if (! iov_done) build_iovec(&iov, &iovlen, mo->m_option, __DECONST(void *, ""), -1); } if (__altflags & mo->m_flag) { char *uscore_opt; if (asprintf(&uscore_opt, "__%s", mo->m_option) == -1) err(1, "failed to allocate memory"); build_iovec(&iov, &iovlen, uscore_opt, __DECONST(void *, ""), -1); free(uscore_opt); } } if (getenv("MOUNT_FUSEFS_SAFE")) safe_level = 1; if (safe_level > 0 && (argc > 0 || daemon_str || daemon_opts)) errx(1, "safe mode, spawning daemon not allowed"); if ((argc > 0 && (daemon_str || daemon_opts)) || (daemon_opts && ! daemon_str)) errx(1, "daemon specified inconsistently"); /* * Resolve the mountpoint with realpath(3) and remove unnecessary * slashes from the devicename if there are any. */ if (checkpath(dir, mntpath) != 0) err(1, "%s", mntpath); (void)rmslashes(dev, dev); if (strcmp(dev, "auto") == 0) dev = __DECONST(char *, "/dev/fuse"); if (strcmp(dev, "/dev/fuse") == 0) { if (! (argc > 0 || daemon_str)) { fprintf(stderr, "Please also specify the fuse daemon to run when mounting via the multiplexer!\n"); usage(); } if ((fd = open(dev, O_RDWR)) < 0) err(1, "failed to open fuse device"); } else { fdx = strtol(dev, &ep, 10); if (*ep == '\0') fd = fdx; } /* Identifying device */ if (fd >= 0) { struct stat sbuf; char *ndevbas, *lep; if (fstat(fd, &sbuf) == -1) err(1, "cannot stat device file descriptor"); strcpy(ndev, _PATH_DEV); ndevbas = ndev + strlen(_PATH_DEV); devname_r(sbuf.st_rdev, S_IFCHR, ndevbas, sizeof(ndev) - strlen(_PATH_DEV)); if (strncmp(ndevbas, "fuse", 4)) errx(1, "mounting inappropriate device"); strtol(ndevbas + 4, &lep, 10); if (*lep != '\0') errx(1, "mounting inappropriate device"); dev = ndev; } if (argc > 0 || daemon_str) { char *fds; if (fd < 0 && (fd = open(dev, O_RDWR)) < 0) err(1, "failed to open fuse device"); if (asprintf(&fds, "%d", fd) == -1) err(1, "failed to allocate memory"); setenv("FUSE_DEV_FD", fds, 1); free(fds); setenv("FUSE_NO_MOUNT", "1", 1); if (daemon_str) { char *bgdaemon; int len; if (! daemon_opts) daemon_opts = __DECONST(char *, ""); len = strlen(daemon_str) + 1 + strlen(daemon_opts) + 2 + 1; bgdaemon = calloc(1, len); if (! bgdaemon) err(1, "failed to allocate memory"); strlcpy(bgdaemon, daemon_str, len); strlcat(bgdaemon, " ", len); strlcat(bgdaemon, daemon_opts, len); strlcat(bgdaemon, " &", len); if (system(bgdaemon)) err(1, "failed to call fuse daemon"); } else { if ((pid = fork()) < 0) err(1, "failed to fork for fuse daemon"); if (pid == 0) { execvp(argv[0], argv); err(1, "failed to exec fuse daemon"); } } } /* Prepare the options vector for nmount(). build_iovec() is declared * in mntopts.h. */ sprintf(fdstr, "%d", fd); build_iovec(&iov, &iovlen, "fstype", __DECONST(void *, "fusefs"), -1); build_iovec(&iov, &iovlen, "fspath", mntpath, -1); build_iovec(&iov, &iovlen, "from", dev, -1); build_iovec(&iov, &iovlen, "fd", fdstr, -1); if (verbose) fprintf(stderr, "mounting fuse daemon on device %s\n", dev); if (nmount(iov, iovlen, mntflags) < 0) err(EX_OSERR, "%s on %s", dev, mntpath); exit(0); } void __usage_short(void) { fprintf(stderr, "usage:\n%s [-A|-S|-v|-V|-h|-D daemon|-O args|-s special|-m node|-o option...] special node [daemon args...]\n\n", getprogname()); } void usage(void) { struct mntopt *mo; __usage_short(); fprintf(stderr, "known options:\n"); for (mo = mopts; mo->m_flag; ++mo) fprintf(stderr, "\t%s\n", mo->m_option); fprintf(stderr, "\n(use -h for a detailed description of these options)\n"); exit(EX_USAGE); } void helpmsg(void) { if (! getenv("MOUNT_FUSEFS_CALL_BY_LIB")) { __usage_short(); fprintf(stderr, "description of options:\n"); } /* * The main use case of this function is giving info embedded in general * FUSE lib help output. Therefore the style and the content of the output * tries to fit there as much as possible. */ fprintf(stderr, " -o allow_other allow access to other users\n" /* " -o nonempty allow mounts over non-empty file/dir\n" */ " -o default_permissions enable permission checking by kernel\n" " -o intr interruptible mount\n" /* " -o fsname=NAME set filesystem name\n" " -o large_read issue large read requests (2.4 only)\n" */ " -o subtype=NAME set filesystem type\n" " -o max_read=N set maximum size of read requests\n" " -o noprivate allow secondary mounting of the filesystem\n" " -o neglect_shares don't report EBUSY when unmount attempted\n" " in presence of secondary mounts\n" " -o push_symlinks_in prefix absolute symlinks with mountpoint\n" ); exit(EX_USAGE); } void showversion(void) { puts("mount_fusefs [fuse4bsd] version: " FUSE4BSD_VERSION); exit(EX_USAGE); }