+/* $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
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