/usr/src/sbin/mount/mount.c

Bug Summary

File:	src/sbin/mount/mount.c
Warning:	line 223, column 19 Potential leak of memory pointed to by 'options'

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name mount.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sbin/mount/obj -resource-dir /usr/local/lib/clang/13.0.0 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/sbin/mount/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/sbin/mount/mount.c

1/*	$OpenBSD: mount.c,v 1.74 2020/12/11 06:29:43 robert Exp $	*/
2/*	$NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp $	*/

4/*
* Copyright (c) 1980, 1989, 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.
*/

33#include <sys/types.h>
34#include <sys/mount.h>
35#include <sys/socket.h>
36#include <sys/wait.h>

38#include <nfs/rpcv2.h>
39#include <nfs/nfsproto.h>
40#include <nfs/nfs.h>

42#include <err.h>
43#include <errno(*__errno()).h>
44#include <fstab.h>
45#include <netdb.h>
46#include <signal.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <unistd.h>
51#include <limits.h>
52#include <util.h>

54#include "pathnames.h"

56int	debug, verbose, skip;
57char	**typelist = NULL((void *)0);
58enum { NONET_FILTER, NET_FILTER } filter = NONET_FILTER;

60int	selected(const char *);
61char   *catopt(char *, const char *);
62char   *flags2opts(u_int32_t);
63struct statfs
     *getmntpt(const char *);
65int	hasopt(const char *, const char *);
66void	maketypelist(char *);
67void	mangle(char *, int *, const char **, int);
68int	mountfs(const char *, const char *, const char *, const char *,
   const char *, int);
70void	prmount(struct statfs *);
71int	disklabelcheck(struct fstab *);
72__dead__attribute__((__noreturn__)) void	usage(void);

74/* Map from mount options to printable formats. */
75static struct opt {
int o_opt;
int o_silent;
const char *o_name;
const char *o_optname;
80} optnames[] = {
{ MNT_ASYNC0x00000040,		0,	"asynchronous",		"async" },
{ MNT_DEFEXPORTED0x00000200,	1,	"exported to the world", "" },
{ MNT_EXPORTED0x00000100,		0,	"NFS exported",		"" },
{ MNT_EXPORTANON0x00000400,	1,	"anon uid mapping",	"" },
{ MNT_EXRDONLY0x00000080,		1,	"exported read-only",	"" },
{ MNT_LOCAL0x00001000,		0,	"local",		"" },
{ MNT_NOATIME0x00008000,		0,	"noatime",		"noatime" },
{ MNT_NODEV0x00000010,		0,	"nodev",		"nodev" },
{ MNT_NOEXEC0x00000004,		0,	"noexec",		"noexec" },
{ MNT_NOSUID0x00000008,		0,	"nosuid",		"nosuid" },
{ MNT_NOPERM0x00000020,		0,	"noperm",		"noperm" },
{ MNT_WXALLOWED0x00000800,	0,	"wxallowed",		"wxallowed" },
{ MNT_QUOTA0x00002000,		0,	"with quotas",		"" },
{ MNT_RDONLY0x00000001,		0,	"read-only",		"ro" },
{ MNT_ROOTFS0x00004000,		1,	"root file system",	"" },
{ MNT_SYNCHRONOUS0x00000002,	0,	"synchronous",		"sync" },
{ MNT_SOFTDEP0x04000000,		0,	"softdep",		"softdep" },
{ 0,			0,	"",			"" }
99};

101int
102main(int argc, char * const argv[])
103{
const char *mntonname, *vfstype;
struct fstab *fs;
struct statfs *mntbuf;
FILE *mountdfp;
pid_t pid;
int all, ch, forceall, i, mntsize, rval, new;
char *options, mntpath[PATH_MAX1024];

all = forceall = 0;
options = NULL((void *)0);
vfstype = "ffs";
while ((ch = getopt(argc, argv, "AadfNo:rswt:uv")) != -1)
1
Assuming the condition is true→
2
←
Loop condition is true.  Entering loop body→
12
←
Assuming the condition is false→
13
←
Loop condition is false. Execution continues on line 165→
switch (ch) {
3
←
Control jumps to 'case 111:'  at line 133→
case 'A':
	all = forceall = 1;
	break;
case 'a':
	all = 1;
	break;
case 'd':
	debug = 1;
	break;
case 'f':
	if (!hasopt(options, "force"))
		options = catopt(options, "force");
	break;
case 'N':
	filter = NET_FILTER;
	break;
case 'o':
	if (*optarg)
4
←
Assuming the condition is true→
5
←
Taking true branch→
		options = catopt(options, optarg);
6
←
Calling 'catopt'→
10
←
Returned allocated memory→
	break;
11
←
 Execution continues on line 115→
case 'r':
	if (!hasopt(options, "ro"))
		options = catopt(options, "ro");
	break;
case 's':
	skip = 1;
	break;
case 't':
	if (typelist != NULL((void *)0))
		errx(1, "only one -t option may be specified.");
	maketypelist(optarg);
	vfstype = optarg;
	break;
case 'u':
	if (!hasopt(options, "update"))
		options = catopt(options, "update");
	break;
case 'v':
	verbose = 1;
	break;
case 'w':
	if (!hasopt(options, "rw"))
		options = catopt(options, "rw");
	break;
case '?':
default:
	usage();
}
argc -= optind;
argv += optind;

if (typelist13.1
'typelist' is equal to NULL
 == NULL((void *)0) && argc == 2) {
14
←
Assuming 'argc' is not equal to 2→
15
←
Taking false branch→
/*
 * If -t flag has not been specified, and spec contains either
 * a ':' or a '@' then assume that an NFS filesystem is being
 * specified ala Sun.  If not, check the disklabel for a
 * known filesystem type.
 */
if (strpbrk(argv[0], ":@") != NULL((void *)0))
	vfstype = "nfs";
else {
	char *labelfs = readlabelfs(argv[0], 0);
	if (labelfs != NULL((void *)0))
		vfstype = labelfs;
}
}

if (pledge("stdio rpath disklabel proc exec", NULL((void *)0)) == -1)
16
←
Assuming the condition is false→
17
←
Taking false branch→
err(1, "pledge");

187#define	BADTYPE(type)(strcmp(type, "ro") && strcmp(type, "rw") && strcmp
(type, "rq"))							\
(strcmp(type, FSTAB_RO"ro") &&					\
   strcmp(type, FSTAB_RW"rw") && strcmp(type, FSTAB_RQ"rq"))

rval = 0;
new = 0;
switch (argc) {
18
←
Control jumps to 'case 0:'  at line 194→
case 0:
if (all18.1
'all' is 0
)
19
←
Taking false branch→
	while ((fs = getfsent()) != NULL((void *)0)) {
		if (BADTYPE(fs->fs_type)(strcmp(fs->fs_type, "ro") && strcmp(fs->fs_type
, "rw") && strcmp(fs->fs_type, "rq")))
			continue;
		switch (filter) {
		case NET_FILTER:
			if (!hasopt(fs->fs_mntops, "net"))
				continue;
			break;
		case NONET_FILTER:
			if (hasopt(fs->fs_mntops, "net"))
				continue;
			break;
		}
		if (!selected(fs->fs_vfstype))
			continue;
		if (hasopt(fs->fs_mntops, "noauto"))
			continue;
		if (disklabelcheck(fs))
			continue;
		if (mountfs(fs->fs_vfstype, fs->fs_spec,
		    fs->fs_file, options,
		    fs->fs_mntops, !forceall))
			rval = 1;
		else
			++new;
	}
else {
	if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT2)) == 0)
20
←
Potential leak of memory pointed to by 'options'
		err(1, "getmntinfo");
	for (i = 0; i < mntsize; i++) {
		if (!selected(mntbuf[i].f_fstypename))
			continue;
		prmount(&mntbuf[i]);
	}
	return (rval);
}
break;
case 1:
if (typelist != NULL((void *)0))
	usage();

if (realpath(*argv, mntpath) == NULL((void *)0)) 
	strlcpy(mntpath, *argv, sizeof(mntpath));
if (hasopt(options, "update")) {
	if ((mntbuf = getmntpt(mntpath)) == NULL((void *)0))
		errx(1,
		    "unknown special file or file system %s.",
		    mntpath);
	if ((mntbuf->f_flags & MNT_ROOTFS0x00004000) &&
	    !strcmp(mntbuf->f_mntfromname, "root_device")) {
		/* Lookup fstab for name of root device. */
		fs = getfsfile(mntbuf->f_mntonname);
		if (fs == NULL((void *)0))
			errx(1,
			    "can't find fstab entry for %s.",
			    mntpath);
	} else {
		if ((fs = malloc(sizeof(*fs))) == NULL((void *)0))
			err(1, NULL((void *)0));
		fs->fs_vfstype = mntbuf->f_fstypename;
		fs->fs_spec = mntbuf->f_mntfromname;
	}
	/*
	 * It's an update, ignore the fstab file options.
	 * Get the current options, so we can change only
	 * the options which given via a command line.
	 */
	fs->fs_mntops = flags2opts(mntbuf->f_flags);
	mntonname = mntbuf->f_mntonname;
} else {
	if ((fs = getfsfile(mntpath)) == NULL((void *)0) &&
	    (fs = getfsspec(mntpath)) == NULL((void *)0))
		errx(1, "can't find fstab entry for %s.",
		    mntpath);
	if (BADTYPE(fs->fs_type)(strcmp(fs->fs_type, "ro") && strcmp(fs->fs_type
, "rw") && strcmp(fs->fs_type, "rq")))
		errx(1, "%s has unknown file system type.",
		    mntpath);
	mntonname = fs->fs_file;
}
rval = mountfs(fs->fs_vfstype, fs->fs_spec,
    mntonname, options, fs->fs_mntops, skip);
break;
case 2:
rval = mountfs(vfstype, argv[0], argv[1], options, NULL((void *)0), skip);
break;
default:
usage();
}

/*
* If the mount was successfully, and done by root, tell mountd the
* good news.  Pid checks are probably unnecessary, but don't hurt.
* XXX This should be done from kernel.
*/
if ((rval == 0 || new) && getuid() == 0 &&
   (mountdfp = fopen(_PATH_MOUNTDPID"/var/run/mountd.pid", "r")) != NULL((void *)0)) {
if (fscanf(mountdfp, "%d", &pid) == 1 &&
    pid > 0 && kill(pid, SIGHUP1) == -1 && errno(*__errno()) != ESRCH3)
	err(1, "signal mountd");
(void)fclose(mountdfp);
}

return (rval);
299}

301int
302hasopt(const char *mntopts, const char *option)
303{
int found;
char *opt, *optbuf;

if (mntopts == NULL((void *)0))
return (0);
if ((optbuf = strdup(mntopts)) == NULL((void *)0))
err(1, NULL((void *)0));
found = 0;
for (opt = optbuf; !found && opt != NULL((void *)0); strsep(&opt, ","))
found = !strncmp(opt, option, strlen(option));
free(optbuf);
return (found);
316}

318/*
* Convert mount(2) flags to list of mount(8) options.
*/
321char*
322flags2opts(u_int32_t flags)
323{
char	*optlist;
struct opt *p;

optlist = NULL((void *)0);
for (p = optnames; p->o_opt; p++) {
if (flags & p->o_opt && *p->o_optname)
	optlist = catopt(optlist, p->o_optname);
}

return(optlist);
334}

336int
337mountfs(const char *vfstype, const char *spec, const char *name,
  const char *options, const char *mntopts, int skipmounted)
339{
char *cp;

/* List of directories containing mount_xxx subcommands. */
static const char *edirs[] = {
_PATH_SBIN"/sbin",
_PATH_USRSBIN"/usr/sbin",
NULL((void *)0)
};
const char **argv, **edir;
struct statfs sf;
pid_t pid;
int argc, i, status, argvsize;
char *optbuf, execname[PATH_MAX1024], mntpath[PATH_MAX1024];

if (realpath(name, mntpath) == NULL((void *)0)) {
warn("realpath %s", name);
return (1);
}

name = mntpath;

if (mntopts == NULL((void *)0))
mntopts = "";

if (options == NULL((void *)0)) {
if (*mntopts == '\0')
	options = "rw";
else {
	options = mntopts;
	mntopts = "";
}
}

/* options follows after mntopts, so they get priority over mntopts */
if ((cp = strdup(mntopts)) == NULL((void *)0))
err(1, NULL((void *)0));
optbuf = catopt(cp, options);

if (strcmp(name, "/") == 0) {
if (!hasopt(optbuf, "update"))
	optbuf = catopt(optbuf, "update");
} else if (skipmounted) {
if (statfs(name, &sf) == -1) {
	warn("statfs %s", name);
	return (1);
}
/* XXX can't check f_mntfromname, thanks to mfs, etc. */
if (strncmp(name, sf.f_mntonname, MNAMELEN90) == 0 &&
    strncmp(vfstype, sf.f_fstypename, MFSNAMELEN16) == 0) {
	if (verbose) {
		printf("%s", sf.f_mntfromname);
		if (strncmp(sf.f_mntfromname,
		    sf.f_mntfromspec, MNAMELEN90) != 0)
			printf(" (%s)", sf.f_mntfromspec);
		printf(" on %s type %.*s: %s\n",
		    sf.f_mntonname,
		    MFSNAMELEN16, sf.f_fstypename,
		    "already mounted");
	}
	return (0);
}
}

argvsize = 64;
if((argv = reallocarray(NULL((void *)0), argvsize, sizeof(char *))) == NULL((void *)0))
err(1, NULL((void *)0));
argc = 0;
argv[argc++] = NULL((void *)0);	/* this should be a full path name */
mangle(optbuf, &argc, argv, argvsize - 4);
argv[argc++] = spec;
argv[argc++] = name;
argv[argc] = NULL((void *)0);

if (debug) {
(void)printf("exec: mount_%s", vfstype);
for (i = 1; i < argc; i++)
	(void)printf(" %s", argv[i]);
(void)printf("\n");
free(optbuf);
free(argv);
return (0);
}

switch ((pid = fork())) {
case -1:				/* Error. */
warn("fork");
free(optbuf);
free(argv);
return (1);
case 0:					/* Child. */
/* Go find an executable. */
edir = edirs;
do {
	(void)snprintf(execname,
	    sizeof(execname), "%s/mount_%s", *edir, vfstype);
	argv[0] = execname;
	execv(execname, (char * const *)argv);
	if (errno(*__errno()) != ENOENT2)
		warn("exec %s for %s", execname, name);
} while (*++edir != NULL((void *)0));

if (errno(*__errno()) == ENOENT2)
	warn("no mount helper program found for %s", vfstype);
_exit(1);
default:				/* Parent. */
free(optbuf);
free(argv);

if (waitpid(pid, &status, 0) == -1) {
	warn("waitpid");
	return (1);
}

if (WIFEXITED(status)(((status) & 0177) == 0)) {
	if (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff) != 0)
		return (WEXITSTATUS(status)(int)(((unsigned)(status) >> 8) & 0xff));
} else if (WIFSIGNALED(status)(((status) & 0177) != 0177 && ((status) & 0177
) != 0)) {
	warnx("%s: %s", name, strsignal(WTERMSIG(status)(((status) & 0177))));
	return (1);
}

if (verbose) {
	if (statfs(name, &sf) == -1) {
		warn("statfs %s", name);
		return (1);
	}
	prmount(&sf);
}
break;
}

return (0);
472}

474void
475prmount(struct statfs *sf)
476{
int flags;
struct opt *o;
int f = 0;

printf("%s", sf->f_mntfromname);
if (verbose &&
   strncmp(sf->f_mntfromname, sf->f_mntfromspec, MNAMELEN90) != 0)
printf(" (%s)", sf->f_mntfromspec);
printf(" on %s type %.*s", sf->f_mntonname,
   MFSNAMELEN16, sf->f_fstypename);

flags = sf->f_flags & MNT_VISFLAGMASK0x0400ffff;
if (verbose && !(flags & MNT_RDONLY0x00000001))
(void)printf("%s%s", !f++ ? " (" : ", ", "rw");
for (o = optnames; flags && o->o_opt; o++)
if (flags & o->o_opt) {
	if (!o->o_silent)
		(void)printf("%s%s", !f++ ? " (" : ", ",
		    o->o_name);
	flags &= ~o->o_opt;
}
if (flags)
(void)printf("%sunknown flag%s %#x", !f++ ? " (" : ", ",
    flags & (flags - 1) ? "s" : "", flags);


if (verbose) {
char buf[26];
time_t t = sf->f_ctime;

ctime_r(&t, buf);
buf[24] = '\0';
printf(", ctime=%s", buf);
}

/*
* Filesystem-specific options
* We only print the "interesting" values unless in verbose
* mode in order to keep the signal/noise ratio high.
*/
if (strcmp(sf->f_fstypename, MOUNT_NFS"nfs") == 0) {
struct protoent *pr;
struct nfs_args *nfs_args = &sf->mount_info.nfs_args;

(void)printf("%s%s", !f++ ? " (" : ", ",
    (nfs_args->flags & NFSMNT_NFSV30x00000200) ? "v3" : "v2");
if (nfs_args->proto && (pr = getprotobynumber(nfs_args->proto)))
	(void)printf("%s%s", !f++ ? " (" : ", ", pr->p_name);
else
	(void)printf("%s%s", !f++ ? " (" : ", ",
	    (nfs_args->sotype == SOCK_DGRAM2) ? "udp" : "tcp");
if (nfs_args->flags & NFSMNT_SOFT0x00000001)
	(void)printf("%s%s", !f++ ? " (" : ", ", "soft");
else if (verbose)
	(void)printf("%s%s", !f++ ? " (" : ", ", "hard");
if (nfs_args->flags & NFSMNT_INT0x00000040)
	(void)printf("%s%s", !f++ ? " (" : ", ", "intr");
if (nfs_args->flags & NFSMNT_NOCONN0x00000080)
	(void)printf("%s%s", !f++ ? " (" : ", ", "noconn");
if (nfs_args->flags & NFSMNT_RDIRPLUS0x00010000)
	(void)printf("%s%s", !f++ ? " (" : ", ", "rdirplus");
if (verbose || nfs_args->wsize != NFS_WSIZE8192)
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "wsize", nfs_args->wsize);
if (verbose || nfs_args->rsize != NFS_RSIZE8192)
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "rsize", nfs_args->rsize);
if (verbose || nfs_args->readdirsize != NFS_READDIRSIZE8192)
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "rdirsize", nfs_args->readdirsize);
if (verbose || nfs_args->timeo != 10) /* XXX */
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "timeo", nfs_args->timeo);
if (verbose || nfs_args->retrans != NFS_RETRANS10)
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "retrans", nfs_args->retrans);
if (verbose || nfs_args->maxgrouplist != NFS_MAXGRPS16)
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "maxgrouplist", nfs_args->maxgrouplist);
if (verbose || nfs_args->readahead != NFS_DEFRAHEAD1)
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "readahead", nfs_args->readahead);
if (verbose) {
	(void)printf("%s%s=%d", !f++ ? " (" : ", ",
	    "acregmin", nfs_args->acregmin);
	(void)printf(", %s=%d",
	    "acregmax", nfs_args->acregmax);
	(void)printf(", %s=%d",
	    "acdirmin", nfs_args->acdirmin);
	(void)printf(", %s=%d",
	    "acdirmax", nfs_args->acdirmax);
}
} else if (strcmp(sf->f_fstypename, MOUNT_MFS"mfs") == 0) {
int headerlen;
long blocksize;
char *header;

header = getbsize(&headerlen, &blocksize);
(void)printf("%s%s=%lu %s", !f++ ? " (" : ", ",
    "size", sf->mount_info.mfs_args.size / blocksize, header);
} else if (strcmp(sf->f_fstypename, MOUNT_MSDOS"msdos") == 0) {
struct msdosfs_args *msdosfs_args = &sf->mount_info.msdosfs_args;

if (verbose || msdosfs_args->uid || msdosfs_args->gid)
	(void)printf("%s%s=%u, %s=%u", !f++ ? " (" : ", ",
	    "uid", msdosfs_args->uid, "gid", msdosfs_args->gid);
if (verbose || msdosfs_args->mask != 0755)
	(void)printf("%s%s=0%o", !f++ ? " (" : ", ",
	    "mask", msdosfs_args->mask);
if (msdosfs_args->flags & MSDOSFSMNT_SHORTNAME0x01)
	(void)printf("%s%s", !f++ ? " (" : ", ", "short");
if (msdosfs_args->flags & MSDOSFSMNT_LONGNAME0x02)
	(void)printf("%s%s", !f++ ? " (" : ", ", "long");
if (msdosfs_args->flags & MSDOSFSMNT_NOWIN950x04)
	(void)printf("%s%s", !f++ ? " (" : ", ", "nowin95");
} else if (strcmp(sf->f_fstypename, MOUNT_CD9660"cd9660") == 0) {
struct iso_args *iso_args = &sf->mount_info.iso_args;

if (iso_args->flags & ISOFSMNT_NORRIP0x00000001)
	(void)printf("%s%s", !f++ ? " (" : ", ", "norrip");
if (iso_args->flags & ISOFSMNT_GENS0x00000002)
	(void)printf("%s%s", !f++ ? " (" : ", ", "gens");
if (iso_args->flags & ISOFSMNT_EXTATT0x00000004)
	(void)printf("%s%s", !f++ ? " (" : ", ", "extatt");
} else if (strcmp(sf->f_fstypename, MOUNT_TMPFS"tmpfs") == 0) {
struct tmpfs_args *tmpfs_args = &sf->mount_info.tmpfs_args;

if (verbose || tmpfs_args->ta_root_uid || tmpfs_args->ta_root_gid)
	(void)printf("%s%s=%u, %s=%u", !f++ ? " (" : ", ",
	    "uid", tmpfs_args->ta_root_uid, "gid", tmpfs_args->ta_root_gid);
if (verbose || tmpfs_args->ta_root_mode != 040755)
	(void)printf("%s%s=%04o", !f++ ? " (" : ", ",
	    "mode", tmpfs_args->ta_root_mode & 07777);
if (verbose || tmpfs_args->ta_size_max)
	(void)printf("%s%s=%lu", !f++ ? " (" : ", ",
	    "size", (unsigned long)tmpfs_args->ta_size_max);
if (verbose || tmpfs_args->ta_nodes_max)
	(void)printf("%s%s=%lu", !f++ ? " (" : ", ",
	    "inodes", (unsigned long)tmpfs_args->ta_nodes_max);
}
(void)printf(f ? ")\n" : "\n");
618}

620struct statfs *
621getmntpt(const char *name)
622{
struct statfs *mntbuf;
int i, mntsize;

mntsize = getmntinfo(&mntbuf, MNT_NOWAIT2);
for (i = 0; i < mntsize; i++)
if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
    strcmp(mntbuf[i].f_mntonname, name) == 0)
	return (&mntbuf[i]);
return (NULL((void *)0));
632}

634static enum { IN_LIST, NOT_IN_LIST } which;

636int
637selected(const char *type)
638{
char **av;

/* If no type specified, it's always selected. */
if (typelist == NULL((void *)0))
return (1);
for (av = typelist; *av != NULL((void *)0); ++av)
if (!strncmp(type, *av, MFSNAMELEN16))
	return (which == IN_LIST ? 1 : 0);
return (which == IN_LIST ? 0 : 1);
648}

650void
651maketypelist(char *fslist)
652{
int i;
char *nextcp, **av;

if ((fslist == NULL((void *)0)) || (fslist[0] == '\0'))
errx(1, "empty type list");

/*
* XXX
* Note: the syntax is "noxxx,yyy" for no xxx's and
* no yyy's, not the more intuitive "noxxx,noyyy".
*/
if (fslist[0] == 'n' && fslist[1] == 'o') {
fslist += 2;
which = NOT_IN_LIST;
} else
which = IN_LIST;

/* Count the number of types. */
for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++)
++nextcp;

/* Build an array of that many types. */
if ((av = typelist = reallocarray(NULL((void *)0), i + 1, sizeof(char *))) == NULL((void *)0))
err(1, NULL((void *)0));
av[0] = fslist;
for (i = 1, nextcp = fslist; (nextcp = strchr(nextcp, ',')); i++) {
*nextcp = '\0';
av[i] = ++nextcp;
}
/* Terminate the array. */
av[i] = NULL((void *)0);
684}

686char *
687catopt(char *s0, const char *s1)
688{
char *cp;

if (s06.1
's0' is null
 && *s0) {
if (asprintf(&cp, "%s,%s", s0, s1) == -1)
	err(1, NULL((void *)0));
} else {
if ((cp = strdup(s1)) == NULL((void *)0))
7
←
Memory is allocated→
8
←
Assuming the condition is false→
9
←
Taking false branch→
	err(1, NULL((void *)0));
}

free(s0);
return cp;
701}

703void
704mangle(char *options, int *argcp, const char **argv, int argcmax)
705{
char *p, *s;
int argc;

argcmax -= 2;
argc = *argcp;
for (s = options; argc <= argcmax && (p = strsep(&s, ",")) != NULL((void *)0);)
if (*p != '\0') {
	if (*p == '-') {
		argv[argc++] = p;
		p = strchr(p, '=');
		if (p) {
			*p = '\0';
			argv[argc++] = p + 1;
		}
	} else {
		argv[argc++] = "-o";
		argv[argc++] = p;
	}
}

*argcp = argc;
727}

729__dead__attribute__((__noreturn__)) void
730usage(void)
731{
(void)fprintf(stderr(&__sF[2]),
   "usage: mount [-AadfNruvw] [-t type]\n"
   "       mount [-dfrsuvw] special | node\n"
   "       mount [-dfruvw] [-o options] [-t type] special node\n");
exit(1);
737}

739int
740disklabelcheck(struct fstab *fs)
741{
char *labelfs;

if (strcmp(fs->fs_vfstype, "nfs") != 0 ||
   strpbrk(fs->fs_spec, ":@") == NULL((void *)0)) {
labelfs = readlabelfs(fs->fs_spec, 0);
if (labelfs == NULL((void *)0) ||
    strcmp(labelfs, fs->fs_vfstype) == 0)
	return (0);
if (strcmp(fs->fs_vfstype, "ufs") == 0 &&
    strcmp(labelfs, "ffs") == 0) {
	warnx("%s: fstab uses outdated type 'ufs' -- fix please",
	    fs->fs_spec);
	return (0);
}
if (strcmp(fs->fs_vfstype, "mfs") == 0 &&
    strcmp(labelfs, "ffs") == 0)
	return (0);
warnx("%s: fstab type %s != disklabel type %s",
    fs->fs_spec, fs->fs_vfstype, labelfs);
return (1);
}
return (0);
764}