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