#include <sys/param.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <vfs/tmpfs/tmpfs_mount.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <grp.h>
#include <mntopts.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <inttypes.h>
#include <libutil.h>
#include "defs.h"
#include "mount_tmpfs.h"
#define MOPT_TMPFSOPTS \
{ "gid=", 0, MNT_GID, 1}, \
{ "uid=", 0, MNT_UID, 1}, \
{ "mode=", 0, MNT_MODE, 1}, \
{ "inodes=", 0, MNT_INODES, 1}, \
{ "size=", 0, MNT_SIZE, 1}, \
{ "maxfilesize=", 0, MNT_MAXFSIZE, 1}
static const struct mntopt mopts[] = {
MOPT_STDOPTS,
MOPT_TMPFSOPTS,
MOPT_NULL
};
static int Cflag;
static gid_t a_gid(char *);
static uid_t a_uid(char *);
static mode_t a_mask(char *);
static int64_t a_number(char *s);
static void usage(void) __dead2;
void
mount_tmpfs_parseargs(int argc, char *argv[],
struct tmpfs_mount_info *args, int *mntflags,
char *canon_dev, char *canon_dir)
{
int gidset, modeset, uidset;
int ch;
gid_t gid;
uid_t uid;
mode_t mode;
struct stat sb;
int extend_flags = 0;
char *ptr, *delim;
memset(args, 0, sizeof(*args));
args->ta_version = TMPFS_ARGS_VERSION;
args->ta_size_max = 0;
args->ta_nodes_max = 0;
args->ta_maxfsize_max = 0;
*mntflags = 0;
gidset = 0; gid = 0;
uidset = 0; uid = 0;
modeset = 0; mode = 0;
optind = optreset = 1;
while ((ch = getopt(argc, argv, "Cf:g:m:n:o:s:u:")) != -1 ) {
switch (ch) {
case 'C':
Cflag = 1;
break;
case 'f':
args->ta_maxfsize_max = a_number(optarg);
break;
case 'g':
gid = a_gid(optarg);
gidset = 1;
break;
case 'm':
mode = a_mask(optarg);
modeset = 1;
break;
case 'n':
args->ta_nodes_max = a_number(optarg);
break;
case 'o':
getmntopts(optarg, mopts, mntflags, &extend_flags);
if (extend_flags & MNT_GID) {
ptr = strstr(optarg, "gid=");
if(ptr) {
delim = strstr(ptr, ",");
if (delim) {
*delim = '\0';
gid = a_gid(ptr + 4);
*delim = ',';
} else
gid = a_gid(ptr + 4);
gidset = 1;
}
extend_flags ^= MNT_GID;
}
if (extend_flags & MNT_UID) {
ptr = strstr(optarg, "uid=");
if(ptr) {
delim = strstr(ptr, ",");
if (delim) {
*delim = '\0';
uid = a_uid(ptr + 4);
*delim = ',';
} else
uid = a_uid(ptr + 4);
uidset = 1;
}
extend_flags ^= MNT_UID;
}
if (extend_flags & MNT_MODE) {
ptr = strstr(optarg, "mode=");
if(ptr) {
delim = strstr(ptr, ",");
if (delim) {
*delim = '\0';
mode = a_mask(ptr + 5);
*delim = ',';
} else
mode = a_mask(ptr + 5);
modeset = 1;
}
extend_flags ^= MNT_MODE;
}
if (extend_flags & MNT_INODES) {
ptr = strstr(optarg, "inodes=");
if(ptr) {
delim = strstr(ptr, ",");
if (delim) {
*delim = '\0';
args->ta_nodes_max = a_number(ptr + 7);
*delim = ',';
} else
args->ta_nodes_max = a_number(ptr + 7);
}
extend_flags ^= MNT_INODES;
}
if (extend_flags & MNT_SIZE) {
ptr = strstr(optarg, "size=");
if(ptr) {
delim = strstr(ptr, ",");
if (delim) {
*delim = '\0';
args->ta_size_max = a_number(ptr + 5);
*delim = ',';
} else
args->ta_size_max = a_number(ptr + 5);
}
extend_flags ^= MNT_SIZE;
}
if (extend_flags & MNT_MAXFSIZE) {
ptr = strstr(optarg, "maxfilesize=");
if(ptr) {
delim = strstr(ptr, ",");
if (delim) {
*delim = '\0';
args->ta_maxfsize_max = a_number(ptr + 12);
*delim = ',';
} else
args->ta_maxfsize_max = a_number(ptr + 12);
}
extend_flags ^= MNT_MAXFSIZE;
}
break;
case 's':
args->ta_size_max = a_number(optarg);
break;
case 'u':
uid = a_uid(optarg);
uidset = 1;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
strlcpy(canon_dev, argv[0], MAXPATHLEN);
strlcpy(canon_dir, argv[1], MAXPATHLEN);
if (stat(canon_dir, &sb) == -1)
err(EXIT_FAILURE, "cannot stat `%s'", canon_dir);
args->ta_root_uid = uidset ? uid : sb.st_uid;
args->ta_root_gid = gidset ? gid : sb.st_gid;
args->ta_root_mode = modeset ? mode : sb.st_mode;
}
static gid_t
a_gid(char *s)
{
struct group *gr;
char *gname;
gid_t gid;
if ((gr = getgrnam(s)) != NULL)
gid = gr->gr_gid;
else {
for (gname = s; *s && isdigit(*s); ++s);
if (!*s)
gid = atoi(gname);
else
errx(EX_NOUSER, "unknown group id: %s", gname);
}
return (gid);
}
static uid_t
a_uid(char *s)
{
struct passwd *pw;
char *uname;
uid_t uid;
if ((pw = getpwnam(s)) != NULL)
uid = pw->pw_uid;
else {
for (uname = s; *s && isdigit(*s); ++s);
if (!*s)
uid = atoi(uname);
else
errx(EX_NOUSER, "unknown user id: %s", uname);
}
return (uid);
}
static mode_t
a_mask(char *s)
{
int done, rv = 0;
char *ep;
done = 0;
if (*s >= '0' && *s <= '7') {
done = 1;
rv = strtol(s, &ep, 8);
}
if (!done || rv < 0 || *ep)
errx(EX_USAGE, "invalid file mode: %s", s);
return (rv);
}
static int64_t
a_number(char *s)
{
int64_t rv = 0;
if (dehumanize_number(s, &rv) < 0 || rv < 0)
errx(EX_USAGE, "bad number for option: %s", s);
return (rv);
}
static void
usage(void)
{
fprintf(stderr,
"Usage: %s [-C] [-g group] [-m mode] [-n nodes] [-o options] [-s size]\n"
" [-u user] [-f maxfilesize] tmpfs mountpoint\n", getprogname());
exit(1);
}
int
mount_tmpfs(int argc, char *argv[])
{
struct tmpfs_mount_info args;
char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN];
int mntflags;
struct vfsconf vfc;
int error;
fsnode_t copyroot = NULL;
fsnode_t copyhlinks = NULL;
mount_tmpfs_parseargs(argc, argv, &args, &mntflags,
canon_dev, canon_dir);
error = getvfsbyname("tmpfs", &vfc);
if (error && vfsisloadable("tmpfs")) {
if(vfsload("tmpfs"))
err(EX_OSERR, "vfsload(%s)", "tmpfs");
endvfsent();
error = getvfsbyname("tmpfs", &vfc);
}
if (error)
errx(EX_OSERR, "%s filesystem not available", "tmpfs");
if (Cflag)
copyroot = FSCopy(©hlinks, canon_dir);
if (mount(vfc.vfc_name, canon_dir, mntflags, &args) == -1)
err(EXIT_FAILURE, "tmpfs on %s", canon_dir);
if (Cflag)
FSPaste(canon_dir, copyroot, copyhlinks);
return EXIT_SUCCESS;
}
#ifndef MOUNT_NOMAIN
int
main(int argc, char *argv[])
{
setprogname(argv[0]);
return mount_tmpfs(argc, argv);
}
#endif
