#include <sys/param.h>
#include <sys/mount.h>
#include <sys/mountctl.h>
#define DKTYPENAMES
#include <sys/dtype.h>
#include <sys/diskslice.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fstab.h>
#include <mntopts.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libutil.h>
#include "extern.h"
#include "pathnames.h"
#define MOUNT_META_OPTION_FSTAB "fstab"
#define MOUNT_META_OPTION_CURRENT "current"
int debug, fstab_style, verbose;
static char *catopt(char *, const char *);
static struct statfs
*getmntpt(const char *);
static int hasopt(const char *, const char *);
static int ismounted(struct fstab *, struct statfs *, int);
static int isremountable(const char *);
static void mangle(char *, int *, const char **);
static char *update_options(char *, char *, int);
static int mountfs(const char *, const char *, const char *,
int, const char *, const char *);
static void remopt(char *, const char *);
static void printdefvals(const struct statfs *);
static void prmount(struct statfs *);
static void putfsent(const struct statfs *);
static void usage(void);
static char *flags2opts(int);
static char *xstrdup(const char *str);
static void checkdisklabel(const char *devpath, const char **vfstypep);
static const char *remountable_fs_names[] = {
"ufs", "ffs", "ext2fs", "hammer", "hammer2",
NULL
};
static void
restart_mountd(void)
{
struct pidfh *pfh;
pid_t mountdpid;
pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
if (pfh != NULL) {
pidfile_remove(pfh);
return;
}
if (errno != EEXIST) {
return;
}
kill(mountdpid, SIGUSR1);
}
int
main(int argc, char **argv)
{
const char *mntfromname, **vfslist, *vfstype;
struct fstab *fs;
struct statfs *mntbuf;
int all, ch, i, init_flags, mntsize, rval, have_fstab;
char *options;
all = init_flags = 0;
options = NULL;
vfslist = NULL;
vfstype = "ufs";
while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) {
switch (ch) {
case 'a':
all = 1;
break;
case 'd':
debug = 1;
break;
case 'F':
setfstab(optarg);
break;
case 'f':
init_flags |= MNT_FORCE;
break;
case 'o':
if (*optarg)
options = catopt(options, optarg);
break;
case 'p':
fstab_style = 1;
verbose = 1;
break;
case 'r':
options = catopt(options, "ro");
break;
case 't':
if (vfslist != NULL)
errx(1, "only one -t option may be specified");
vfslist = makevfslist(optarg);
vfstype = optarg;
break;
case 'u':
init_flags |= MNT_UPDATE;
break;
case 'v':
verbose = 1;
break;
case 'w':
options = catopt(options, "noro");
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
#define BADTYPE(type) \
(strcmp(type, FSTAB_RO) && \
strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
rval = 0;
switch (argc) {
case 0:
if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
err(1, "getmntinfo");
if (all) {
while ((fs = getfsent()) != NULL) {
if (BADTYPE(fs->fs_type))
continue;
if (checkvfsname(fs->fs_vfstype, vfslist))
continue;
if (hasopt(fs->fs_mntops, "noauto"))
continue;
if (!(init_flags & MNT_UPDATE) &&
ismounted(fs, mntbuf, mntsize))
continue;
options = update_options(options,
fs->fs_mntops, mntbuf->f_flags);
if (mountfs(fs->fs_vfstype, fs->fs_spec,
fs->fs_file, init_flags, options,
fs->fs_mntops))
rval = 1;
}
} else if (fstab_style) {
for (i = 0; i < mntsize; i++) {
if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
continue;
putfsent(&mntbuf[i]);
}
} else {
for (i = 0; i < mntsize; i++) {
if (checkvfsname(mntbuf[i].f_fstypename,
vfslist))
continue;
prmount(&mntbuf[i]);
}
}
exit(rval);
case 1:
if (vfslist != NULL)
usage();
rmslashes(*argv, *argv);
if (init_flags & MNT_UPDATE) {
mntfromname = NULL;
have_fstab = 0;
if ((mntbuf = getmntpt(*argv)) == NULL)
errx(1, "not currently mounted %s", *argv);
if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
if (strcmp(fs->fs_spec,
mntbuf->f_mntfromname) == 0 &&
strcmp(fs->fs_file,
mntbuf->f_mntonname) == 0) {
have_fstab = 1;
mntfromname = mntbuf->f_mntfromname;
} else if (argv[0][0] == '/' &&
argv[0][1] == '\0') {
fs = getfsfile("/");
have_fstab = 1;
mntfromname = fs->fs_spec;
}
}
if (have_fstab) {
options = update_options(options, fs->fs_mntops,
mntbuf->f_flags);
} else {
mntfromname = mntbuf->f_mntfromname;
options = update_options(options, NULL,
mntbuf->f_flags);
}
rval = mountfs(mntbuf->f_fstypename, mntfromname,
mntbuf->f_mntonname, init_flags, options, 0);
break;
}
if ((fs = getfsfile(*argv)) == NULL &&
(fs = getfsspec(*argv)) == NULL)
errx(1, "%s: unknown special file or file system",
*argv);
if (BADTYPE(fs->fs_type))
errx(1, "%s has unknown file system type",
*argv);
rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
init_flags, options, fs->fs_mntops);
break;
case 2:
if (vfslist == NULL) {
if (strpbrk(argv[0], ":") != NULL &&
access(argv[0], 0) == -1) {
vfstype = "nfs";
} else if (strpbrk(argv[0], "@") != NULL &&
access(argv[0], 0) == -1) {
vfstype = "hammer2";
} else {
checkdisklabel(argv[0], &vfstype);
}
}
rval = mountfs(vfstype, getdevpath(argv[0], 0), argv[1],
init_flags, options, NULL);
break;
default:
usage();
}
if (rval == 0 && getuid() == 0)
restart_mountd();
exit(rval);
}
static int
ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
{
int i;
if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
return (0);
for (i = mntsize - 1; i >= 0; --i)
if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 &&
(!isremountable(fs->fs_vfstype) ||
strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
return (1);
return (0);
}
static int
isremountable(const char *vfsname)
{
const char **cp;
for (cp = remountable_fs_names; *cp; cp++)
if (strcmp(*cp, vfsname) == 0)
return (1);
return (0);
}
static int
hasopt(const char *mntopts, const char *option)
{
int negative, found;
char *opt, *optbuf;
if (option[0] == 'n' && option[1] == 'o') {
negative = 1;
option += 2;
} else
negative = 0;
optbuf = xstrdup(mntopts);
found = 0;
for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
if (opt[0] == 'n' && opt[1] == 'o') {
if (!strcasecmp(opt + 2, option))
found = negative;
} else if (!strcasecmp(opt, option))
found = !negative;
}
free(optbuf);
return (found);
}
static int
mountfs(const char *vfstype, const char *spec, const char *name, int flags,
const char *options, const char *mntopts)
{
static const char *edirs[] = {
_PATH_SBIN,
_PATH_USRSBIN,
NULL
};
const char *argv[100], **edir;
struct statfs sf;
pid_t pid;
int argc, i, status;
char *optbuf;
char *argv0;
char execname[MAXPATHLEN + 1];
char mntpath[MAXPATHLEN];
checkpath(name, mntpath);
name = mntpath;
if (mntopts == NULL)
mntopts = "";
if (options == NULL) {
if (*mntopts == '\0') {
options = "rw";
} else {
options = mntopts;
mntopts = "";
}
}
optbuf = catopt(xstrdup(mntopts), options);
if (strcmp(name, "/") == 0)
flags |= MNT_UPDATE;
if (flags & MNT_FORCE)
optbuf = catopt(optbuf, "force");
if (flags & MNT_RDONLY)
optbuf = catopt(optbuf, "ro");
if (flags & MNT_UPDATE)
optbuf = catopt(optbuf, "update");
asprintf(&argv0, "mount_%s", vfstype);
argc = 0;
argv[argc++] = argv0;
mangle(optbuf, &argc, argv);
argv[argc++] = spec;
argv[argc++] = name;
argv[argc] = NULL;
if (debug) {
printf("exec: mount_%s", vfstype);
for (i = 1; i < argc; i++)
printf(" %s", argv[i]);
printf("\n");
return (0);
}
switch (pid = fork()) {
case -1:
warn("fork");
free(optbuf);
return (1);
case 0:
for (edir = edirs; *edir; edir++) {
snprintf(execname, sizeof(execname),
"%s/mount_%s", *edir, vfstype);
execv(execname, __DECONST(char * const *, argv));
}
if (errno == ENOENT) {
int len = 0;
char *cp;
for (edir = edirs; *edir; edir++)
len += strlen(*edir) + 2;
if ((cp = malloc(len)) == NULL)
errx(1, "malloc failed");
cp[0] = '\0';
for (edir = edirs; *edir; edir++) {
strcat(cp, *edir);
if (edir[1] != NULL)
strcat(cp, ", ");
}
warn("exec mount_%s not found in %s", vfstype, cp);
}
exit(1);
default:
free(optbuf);
if (waitpid(pid, &status, 0) < 0) {
warn("waitpid");
return (1);
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0)
return (WEXITSTATUS(status));
} else if (WIFSIGNALED(status)) {
warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
return (1);
}
if (verbose) {
if (statfs(name, &sf) < 0) {
warn("statfs %s", name);
return (1);
}
if (fstab_style)
putfsent(&sf);
else
prmount(&sf);
}
break;
}
return (0);
}
static void
prmount(struct statfs *sfp)
{
struct passwd *pw;
char *buf;
int error;
int len;
error = 0;
len = 256;
if ((buf = malloc(len)) == NULL)
errx(1, "malloc failed");
printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
sfp->f_fstypename);
error = mountctl(sfp->f_mntonname, MOUNTCTL_MOUNTFLAGS,
-1, NULL, 0, buf, len);
if (sfp->f_owner) {
printf(", mounted by ");
if ((pw = getpwuid(sfp->f_owner)) != NULL)
printf("%s", pw->pw_name);
else
printf("%d", sfp->f_owner);
}
if (error != -1 && strlen(buf))
printf(", %s", buf);
if (verbose) {
if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
printf(", writes: sync %ld async %ld",
sfp->f_syncwrites, sfp->f_asyncwrites);
if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
printf(", reads: sync %ld async %ld",
sfp->f_syncreads, sfp->f_asyncreads);
}
printf(")\n");
}
static struct statfs *
getmntpt(const char *name)
{
struct statfs *mntbuf;
int i, mntsize;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = mntsize - 1; i >= 0; i--) {
if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
strcmp(mntbuf[i].f_mntonname, name) == 0)
return (&mntbuf[i]);
}
return (NULL);
}
static char *
catopt(char *s0, const char *s1)
{
size_t i;
char *cp;
if (s1 == NULL || *s1 == '\0')
return s0;
if (s0 && *s0) {
i = strlen(s0) + strlen(s1) + 1 + 1;
if ((cp = malloc(i)) == NULL)
errx(1, "malloc failed");
snprintf(cp, i, "%s,%s", s0, s1);
} else
cp = xstrdup(s1);
if (s0)
free(s0);
return (cp);
}
static void
mangle(char *options, int *argcp, const char **argv)
{
char *p, *s;
int argc;
argc = *argcp;
for (s = options; (p = strsep(&s, ",")) != NULL;)
if (*p != '\0') {
if (*p == '-') {
argv[argc++] = p;
p = strchr(p, '=');
if (p) {
*p = '\0';
argv[argc++] = p+1;
}
} else if (strcmp(p, "rw") != 0) {
argv[argc++] = "-o";
argv[argc++] = p;
}
}
*argcp = argc;
}
static char *
update_options(char *opts, char *fstab, int curflags)
{
char *o, *p;
char *cur;
char *expopt, *newopt, *tmpopt;
if (opts == NULL)
return xstrdup("");
remopt(fstab, MOUNT_META_OPTION_FSTAB);
remopt(fstab, MOUNT_META_OPTION_CURRENT);
cur = flags2opts(curflags);
expopt = NULL;
for (p = opts; (o = strsep(&p, ",")) != NULL;) {
if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
expopt = catopt(expopt, fstab);
else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
expopt = catopt(expopt, cur);
else
expopt = catopt(expopt, o);
}
free(cur);
free(opts);
newopt = NULL;
for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
errx(1, "malloc failed");
strcpy(tmpopt, "no");
strcat(tmpopt, o);
remopt(newopt, tmpopt);
free(tmpopt);
if (strncmp("no", o, 2) == 0)
remopt(newopt, o+2);
newopt = catopt(newopt, o);
}
free(expopt);
return newopt;
}
static void
remopt(char *string, const char *opt)
{
char *o, *p, *r;
if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
return;
r = string;
for (p = string; (o = strsep(&p, ",")) != NULL;) {
if (strcmp(opt, o) != 0) {
if (*r == ',' && *o != '\0')
r++;
while ((*r++ = *o++) != '\0')
;
*--r = ',';
}
}
*r = '\0';
}
static void
usage(void)
{
fprintf(stderr, "%s\n%s\n%s\n",
"usage: mount [-adfpruvw] [-F fstab] [-o options] [-t type]",
" mount [-dfpruvw] {special | node}",
" mount [-dfpruvw] [-o options] [-t type] special node");
exit(1);
}
static void
printdefvals(const struct statfs *ent)
{
if (strcmp(ent->f_fstypename, "ufs") == 0) {
if (strcmp(ent->f_mntonname, "/") == 0)
printf("\t1 1\n");
else
printf("\t2 2\n");
} else {
printf("\t0 0\n");
}
}
static void
putfsent(const struct statfs *ent)
{
struct stat sb;
struct fstab *fst;
char *opts;
opts = flags2opts(ent->f_flags);
printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
ent->f_fstypename, opts);
free(opts);
if (stat(_PATH_FSTAB, &sb) != -1) {
if ((fst = getfsspec(ent->f_mntfromname)))
printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
else if ((fst = getfsfile(ent->f_mntonname)))
printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
else
printdefvals(ent);
} else {
printdefvals(ent);
}
}
static char *
flags2opts(int flags)
{
char *res;
res = NULL;
res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
if (flags & MNT_NODEV) res = catopt(res, "nodev");
if (flags & MNT_ASYNC) res = catopt(res, "async");
if (flags & MNT_NOATIME) res = catopt(res, "noatime");
if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
if (flags & MNT_IGNORE) res = catopt(res, "ignore");
return res;
}
static char*
xstrdup(const char *str)
{
char* ret = strdup(str);
if(ret == NULL) {
errx(1, "strdup failed (could not allocate memory)");
}
return ret;
}
static int
iscdmedia(const char *path, int fd __unused)
{
int n;
if (strrchr(path, '/'))
path = strrchr(path, '/') + 1;
if (sscanf(path, "acd%d", &n) == 1)
return 1;
if (sscanf(path, "cd%d", &n) == 1)
return 1;
return 0;
}
static void
checkdisklabel(const char *devpath, const char **vfstypep)
{
struct stat st;
struct partinfo info;
char *path = strdup(devpath);
int fd;
if (strchr(path, '@'))
*strchr(path, '@') = 0;
if (strchr(path, ':'))
*strchr(path, ':') = 0;
if (stat(path, &st) < 0)
goto done;
if (!S_ISCHR(st.st_mode))
goto done;
fd = open(path, O_RDONLY);
if (fd < 0)
goto done;
if (ioctl(fd, DIOCGPART, &info) == 0) {
if (info.fstype >= 0 && info.fstype < (int)FSMAXTYPES) {
if (fstype_to_vfsname[info.fstype]) {
*vfstypep = fstype_to_vfsname[info.fstype];
} else if (iscdmedia(path, fd)) {
*vfstypep = "cd9660";
} else {
fprintf(stderr,
"mount: warning: fstype in disklabel "
"not set to anything I understand\n");
fprintf(stderr,
"attempting to mount with -t ufs\n");
}
}
}
close(fd);
done:
free(path);
}
