diff options
Diffstat (limited to 'misc/fstab.c')
| -rw-r--r-- | misc/fstab.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/misc/fstab.c b/misc/fstab.c new file mode 100644 index 0000000000..ac59cab861 --- /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); +} |