c78c4633a2
portability between POSIX systems. Submitted by: Chuck Rouillard (manpage, initial implementation)
193 lines
4.2 KiB
C
193 lines
4.2 KiB
C
/*-
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* Copyright (c) 2002 Tim J. Robbins.
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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/*
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* pathchk -- check pathnames
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*
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* Check whether files could be created with the names specified on the
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* command line. If -p is specified, check whether the pathname is portable
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* to all POSIX systems.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.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 <unistd.h>
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static int check(const char *);
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static int portable(const char *);
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static void usage(void);
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static int pflag; /* Perform portability checks */
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int
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main(int argc, char *argv[])
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{
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int ch, rval;
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const char *arg;
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while ((ch = getopt(argc, argv, "p")) > 0) {
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switch (ch) {
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case 'p':
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pflag = 1;
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break;
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default:
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usage();
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/*NOTREACHED*/
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}
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}
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argc -= optind;
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argv += optind;
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if (argc == 0)
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usage();
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rval = 0;
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while ((arg = *argv++) != NULL)
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rval |= check(arg);
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exit(rval);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: pathchk [-p] pathname...\n");
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exit(1);
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}
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static int
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check(const char *path)
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{
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struct stat sb;
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long complen, namemax, pathmax, svnamemax;
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int badch, last;
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char *end, *p, *pathd;
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if ((pathd = strdup(path)) == NULL)
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err(1, "strdup");
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p = pathd;
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if (!pflag) {
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errno = 0;
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namemax = pathconf(*p == '/' ? "/" : ".", _PC_NAME_MAX);
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if (namemax == -1 && errno != 0)
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namemax = NAME_MAX;
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} else
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namemax = _POSIX_NAME_MAX;
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for (;;) {
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p += strspn(p, "/");
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complen = (long)strcspn(p, "/");
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end = p + complen;
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last = *end == '\0';
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*end = '\0';
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if (namemax != -1 && complen > namemax) {
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warnx("%s: %s: component too long (limit %ld)", path,
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p, namemax);
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goto bad;
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}
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if (!pflag && stat(pathd, &sb) == -1 && errno != ENOENT) {
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warn("%s", pathd);
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goto bad;
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}
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if (pflag && (badch = portable(p)) >= 0) {
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warnx("%s: %s: component contains non-portable "
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"character `%c'", path, p, badch);
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goto bad;
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}
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if (last)
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break;
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if (!pflag) {
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errno = 0;
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svnamemax = namemax;
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namemax = pathconf(pathd, _PC_NAME_MAX);
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if (namemax == -1 && errno != 0)
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namemax = svnamemax;
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}
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*end = '/';
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p = end + 1;
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}
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if (!pflag) {
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errno = 0;
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pathmax = pathconf(path, _PC_PATH_MAX);
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if (pathmax == -1 && errno != 0)
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pathmax = PATH_MAX;
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} else
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pathmax = _POSIX_PATH_MAX;
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if (pathmax != -1 && strlen(path) > (size_t)pathmax) {
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warnx("%s: path too long (limit %ld)", path, pathmax);
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goto bad;
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}
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free(pathd);
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return (0);
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bad: free(pathd);
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return (1);
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}
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/*
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* Check whether a path component contains only portable characters. Return
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* the first non-portable character found.
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*/
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static int
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portable(const char *path)
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{
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static const char charset[] =
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"0123456789._-";
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long s;
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if (*path == '-')
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return (*path);
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s = strspn(path, charset);
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if (path[s] != '\0')
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return (path[s]);
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return (-1);
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}
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