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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /misc/fstab.c
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initial import
Diffstat (limited to 'misc/fstab.c')
-rw-r--r--misc/fstab.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/misc/fstab.c b/misc/fstab.c
new file mode 100644
index 0000000..ac59cab
--- /dev/null
+++ b/misc/fstab.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright (c) 1980, 1988, 1993
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <errno.h>
+#include <fstab.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef EFTYPE
+#define EFTYPE EINVAL
+#endif
+
+static FILE *_fs_fp;
+static struct fstab _fs_fstab;
+
+static void error __P((int));
+
+static int
+fstabscan __P((void))
+{
+ register char *cp;
+#define MAXLINELENGTH 1024
+ static char line[MAXLINELENGTH];
+ char subline[MAXLINELENGTH];
+ int typexx;
+
+ for (;;) {
+ if (!(cp = fgets(line, sizeof(line), _fs_fp)))
+ return(0);
+/* OLD_STYLE_FSTAB */
+ if (!strpbrk(cp, " \t")) {
+ _fs_fstab.fs_spec = strtok(cp, ":\n");
+ _fs_fstab.fs_file = strtok((char *)NULL, ":\n");
+ _fs_fstab.fs_type = strtok((char *)NULL, ":\n");
+ if (_fs_fstab.fs_type) {
+ if (!strcmp(_fs_fstab.fs_type, FSTAB_XX))
+ continue;
+ _fs_fstab.fs_mntops = _fs_fstab.fs_type;
+ _fs_fstab.fs_vfstype =
+ strcmp(_fs_fstab.fs_type, FSTAB_SW) ?
+ "ufs" : "swap";
+ if (cp = strtok((char *)NULL, ":\n")) {
+ _fs_fstab.fs_freq = atoi(cp);
+ if (cp = strtok((char *)NULL, ":\n")) {
+ _fs_fstab.fs_passno = atoi(cp);
+ return(1);
+ }
+ }
+ }
+ goto bad;
+ }
+/* OLD_STYLE_FSTAB */
+ _fs_fstab.fs_spec = strtok(cp, " \t\n");
+ if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#')
+ continue;
+ _fs_fstab.fs_file = strtok((char *)NULL, " \t\n");
+ _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n");
+ _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n");
+ if (_fs_fstab.fs_mntops == NULL)
+ goto bad;
+ _fs_fstab.fs_freq = 0;
+ _fs_fstab.fs_passno = 0;
+ if ((cp = strtok((char *)NULL, " \t\n")) != NULL) {
+ _fs_fstab.fs_freq = atoi(cp);
+ if ((cp = strtok((char *)NULL, " \t\n")) != NULL)
+ _fs_fstab.fs_passno = atoi(cp);
+ }
+ strcpy(subline, _fs_fstab.fs_mntops);
+ for (typexx = 0, cp = strtok(subline, ","); cp;
+ cp = strtok((char *)NULL, ",")) {
+ if (strlen(cp) != 2)
+ continue;
+ if (!strcmp(cp, FSTAB_RW)) {
+ _fs_fstab.fs_type = FSTAB_RW;
+ break;
+ }
+ if (!strcmp(cp, FSTAB_RQ)) {
+ _fs_fstab.fs_type = FSTAB_RQ;
+ break;
+ }
+ if (!strcmp(cp, FSTAB_RO)) {
+ _fs_fstab.fs_type = FSTAB_RO;
+ break;
+ }
+ if (!strcmp(cp, FSTAB_SW)) {
+ _fs_fstab.fs_type = FSTAB_SW;
+ break;
+ }
+ if (!strcmp(cp, FSTAB_XX)) {
+ _fs_fstab.fs_type = FSTAB_XX;
+ typexx++;
+ break;
+ }
+ }
+ if (typexx)
+ continue;
+ if (cp != NULL)
+ return(1);
+
+bad: /* no way to distinguish between EOF and syntax error */
+ error(EFTYPE);
+ }
+ /* NOTREACHED */
+}
+
+struct fstab *
+getfsent()
+{
+ if (!_fs_fp && !setfsent() || !fstabscan())
+ return((struct fstab *)NULL);
+ return(&_fs_fstab);
+}
+
+struct fstab *
+getfsspec(name)
+ register const char *name;
+{
+ if (setfsent())
+ while (fstabscan())
+ if (!strcmp(_fs_fstab.fs_spec, name))
+ return(&_fs_fstab);
+ return((struct fstab *)NULL);
+}
+
+struct fstab *
+getfsfile(name)
+ register const char *name;
+{
+ if (setfsent())
+ while (fstabscan())
+ if (!strcmp(_fs_fstab.fs_file, name))
+ return(&_fs_fstab);
+ return((struct fstab *)NULL);
+}
+
+setfsent()
+{
+ if (_fs_fp) {
+ rewind(_fs_fp);
+ return(1);
+ }
+ if (_fs_fp = fopen(_PATH_FSTAB, "r"))
+ return(1);
+ error(errno);
+ return(0);
+}
+
+void
+endfsent()
+{
+ if (_fs_fp) {
+ (void)fclose(_fs_fp);
+ _fs_fp = NULL;
+ }
+}
+
+static void
+error(err)
+ int err;
+{
+ char *p;
+
+ (void)write(STDERR_FILENO, "fstab: ", 7);
+ (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1);
+ (void)write(STDERR_FILENO, ": ", 1);
+ p = strerror(err);
+ (void)write(STDERR_FILENO, p, strlen(p));
+ (void)write(STDERR_FILENO, "\n", 1);
+}