mirror of https://github.com/ventoy/Ventoy
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
372 lines
8.4 KiB
C
372 lines
8.4 KiB
C
/* $NetBSD: mount_tmpfs.c,v 1.24 2008/08/05 20:57:45 pooka Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Julio M. Merino Vidal, developed as part of Google's Summer of Code
|
|
* 2005 program.
|
|
*
|
|
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <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; /* Ought to be 'bool'. */
|
|
int ch;
|
|
gid_t gid;
|
|
uid_t uid;
|
|
mode_t mode;
|
|
struct stat sb;
|
|
int extend_flags = 0;
|
|
char *ptr, *delim;
|
|
|
|
/* Set default values for mount point arguments. */
|
|
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
|