file_cmds-116.9.tar.gz

[apple/file_cmds.git] / pathchk / pathchk.c

diff --git a/pathchk/pathchk.c b/pathchk/pathchk.c
new file mode 100644 (file)
index 0000000..233a6d0
--- /dev/null
+++ b/pathchk/pathchk.c
@@ -0,0 +1,196 @@
+/*-
+ * 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>
+
+/* Commenting __FBSDID, as it is not needed n OSX ......
+__FBSDID("$FreeBSD: src/usr.bin/pathchk/pathchk.c,v 1.4 2002/12/15 00:40:47 tjr Exp $");
+*/
+
+#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);
+}