diff options
Diffstat (limited to 'usr.bin/pathchk/pathchk.c')
| -rw-r--r-- | usr.bin/pathchk/pathchk.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/usr.bin/pathchk/pathchk.c b/usr.bin/pathchk/pathchk.c new file mode 100644 index 0000000..2d8fa59 --- /dev/null +++ b/usr.bin/pathchk/pathchk.c @@ -0,0 +1,203 @@ +/*- + * 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 */ +static int Pflag; /* Check for empty paths, leading '-' */ + +int +main(int argc, char *argv[]) +{ + int ch, rval; + const char *arg; + + while ((ch = getopt(argc, argv, "pP")) > 0) { + switch (ch) { + case 'p': + pflag = 1; + break; + 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 && *p == '\0') { + warnx("%s: empty pathname", path); + goto bad; + } + if ((Pflag || pflag) && (*p == '-' || strstr(p, "/-") != NULL)) { + warnx("%s: contains a component starting with '-'", path); + goto bad; + } + + 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; + + s = strspn(path, charset); + if (path[s] != '\0') + return (path[s]); + + return (-1); +} |
