Initial revision
authorroland <roland>
Tue, 30 Aug 1994 11:13:03 +0000 (11:13 +0000)
committerroland <roland>
Tue, 30 Aug 1994 11:13:03 +0000 (11:13 +0000)
misc/fstab.c [new file with mode: 0644]

diff --git a/misc/fstab.c b/misc/fstab.c
new file mode 100644 (file)
index 0000000..48e5352
--- /dev/null
@@ -0,0 +1,202 @@
+/*
+ * 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>
+
+static FILE *_fs_fp;
+static struct fstab _fs_fstab;
+
+static error __P((int));
+static fstabscan __P((void));
+
+static
+fstabscan()
+{
+       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
+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);
+}