906c312bbf
The mntopts(3) functions support operations associated with a mount point. The main purpose of this commit is to document the mntopts(3) functions that now appear in 18 utilities in the base system. See mntopts(3) for the documentation details. The getmntopts() function appeared in 4.4BSD. The build_iovec(), build_iovec_argf(), free_iovec(), checkpath(), and rmslashes() functions were added with nmount(8) in FreeBSD 5.0. The getmntpoint() and chkdoreload() functions are being added in this commit. These functions should be in a library but for historic reasons are in a file in the sources for the mount(8) program. Thus, to access them the following lines need to be added to the Makefile of the program wanting to use them: SRCS+= getmntopts.c MOUNT= ${SRCTOP}/sbin/mount CFLAGS+= -I${MOUNT} .PATH: ${MOUNT} Once these changes have been MFC'ed to 13 they may be made into a library. Reviewed by: kib, gbe MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D37907
225 lines
4.6 KiB
C
225 lines
4.6 KiB
C
/* $NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $");
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#endif /* not lint */
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <err.h>
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#include <fstab.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fsutil.h"
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static const char *dev = NULL;
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static int preen = 0;
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static void vmsg(int, const char *, va_list) __printflike(2, 0);
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/*
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* The getfsopt() function checks whether an option is present in
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* an fstab(5) fs_mntops entry. There are six possible cases:
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*
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* fs_mntops getfsopt result
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* rw,foo foo true
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* rw,nofoo nofoo true
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* rw,nofoo foo false
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* rw,foo nofoo false
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* rw foo false
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* rw nofoo false
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*
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* This function should be part of and documented in getfsent(3).
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*/
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int
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getfsopt(struct fstab *fs, const char *option)
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{
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int negative, found;
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char *opt, *optbuf;
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if (option[0] == 'n' && option[1] == 'o') {
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negative = 1;
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option += 2;
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} else
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negative = 0;
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optbuf = strdup(fs->fs_mntops);
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found = 0;
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for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
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if (opt[0] == 'n' && opt[1] == 'o') {
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if (!strcasecmp(opt + 2, option))
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found = negative;
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} else if (!strcasecmp(opt, option))
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found = !negative;
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}
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free(optbuf);
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return (found);
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}
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void
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setcdevname(const char *cd, int pr)
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{
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dev = cd;
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preen = pr;
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}
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const char *
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cdevname(void)
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{
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return dev;
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}
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static void
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vmsg(int fatal, const char *fmt, va_list ap)
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{
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if (!fatal && preen)
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(void) printf("%s: ", dev);
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(void) vprintf(fmt, ap);
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if (fatal && preen)
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(void) printf("\n");
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if (fatal && preen) {
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(void) printf(
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"%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
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dev, getprogname());
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exit(8);
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}
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}
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/*VARARGS*/
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void
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pfatal(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(1, fmt, ap);
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va_end(ap);
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}
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/*VARARGS*/
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void
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pwarn(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(0, fmt, ap);
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va_end(ap);
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}
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void
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perr(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(1, fmt, ap);
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va_end(ap);
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}
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void
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panic(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vmsg(1, fmt, ap);
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va_end(ap);
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exit(8);
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}
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const char *
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devcheck(const char *origname)
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{
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struct stat stslash, stchar;
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if (stat("/", &stslash) < 0) {
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perr("Can't stat `/'");
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return (origname);
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}
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if (stat(origname, &stchar) < 0) {
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perr("Can't stat %s\n", origname);
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return (origname);
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}
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if (!S_ISCHR(stchar.st_mode)) {
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perr("%s is not a char device\n", origname);
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}
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return (origname);
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}
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void *
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emalloc(size_t s)
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{
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void *p;
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p = malloc(s);
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if (p == NULL)
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err(1, "malloc failed");
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return (p);
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}
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void *
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erealloc(void *p, size_t s)
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{
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void *q;
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q = realloc(p, s);
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if (q == NULL)
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err(1, "realloc failed");
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return (q);
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}
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char *
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estrdup(const char *s)
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{
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char *p;
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p = strdup(s);
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if (p == NULL)
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err(1, "strdup failed");
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return (p);
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}
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