commit b445614f7021c76902ad2ed41e4d3d0087b04e98
parent cfc37be4862574ac68f424a42763cf5681243812
Author: Mattias Andrée <maandree@kth.se>
Date: Wed, 3 Feb 2016 20:12:26 +0100
Add pathchk(1)
New command, including man page.
UTF-8 compatible and should be POSIX-compliant.
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat:
6 files changed, 161 insertions(+), 1 deletion(-)
diff --git a/LICENSE b/LICENSE
@@ -59,3 +59,4 @@ Authors/contributors include:
© 2015 Quentin Rameau <quinq@quinq.eu.org>
© 2015 Dionysis Grigoropoulos <info@erethon.com>
© 2015 Wolfgang Corcoran-Mathe <first.lord.of.teal@gmail.com>
+© 2016 Mattias Andrée <maandree@kth.se>
diff --git a/Makefile b/Makefile
@@ -120,6 +120,7 @@ BIN =\
nl\
nohup\
od\
+ pathchk\
paste\
printenv\
printf\
diff --git a/README b/README
@@ -58,6 +58,7 @@ The following tools are implemented:
#*|o nl .
=*|o nohup .
=*|o od .
+#* o pathchk .
#*|o paste .
=*|x printenv .
#*|o printf .
diff --git a/TODO b/TODO
@@ -10,7 +10,6 @@ diff
ed manpage
install
patch
-pathchk
stty
If you are looking for some work to do on sbase, another option is to
diff --git a/pathchk.1 b/pathchk.1
@@ -0,0 +1,35 @@
+.Dd 2016-02-03
+.Dt PATHCHK 1
+.Os sbase
+.Sh NAME
+.Nm pathchk
+.Nd validate filename validity or portability
+.Sh SYNOPSIS
+.Nm
+.Op Fl p
+.Op Fl P
+.Ar file Ar ...
+.Sh DESCRIPTION
+.Nm
+checks that filenames are valid for the system,
+and optional on other POSIX systems.
+.Sh OPTIONS
+.Bl -tag -width Ds
+.It Fl p
+Check for most POSIX systems.
+.It Fl P
+Check for empty pathnames and leading hythens.
+.El
+.Sh EXIT STATUS
+.Bl -tag -width Ds
+.It 0
+A filename was not valid or portable.
+.It > 0
+An error occurred.
+.El
+.Sh STANDARDS
+The
+.Nm
+utility is compliant with the
+.St -p1003.1-2013
+specification.
diff --git a/pathchk.c b/pathchk.c
@@ -0,0 +1,123 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <stdint.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include "util.h"
+#include "arg.h"
+
+#define PORTABLE_CHARACTER_SET "0123456789._-qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM"
+/* If your system supports more other characters, but not all non-NUL characters, define SYSTEM_CHARACTER_SET. */
+
+#ifndef PATH_MAX
+# define PATH_MAX SIZE_MAX
+#endif
+#ifndef NAME_MAX
+# define NAME_MAX SIZE_MAX
+#endif
+
+static int most = 0;
+static int extra = 0;
+
+static void
+usage(void)
+{
+ fprintf(stderr, "usage: %s [-pP] filename...\n", argv0);
+ exit(1);
+}
+
+static int
+pathchk(char *filename)
+{
+ char *invalid, *invalid_end, *p, *q;
+ const char *character_set;
+ size_t len, maxlen;
+ struct stat _attr;
+
+ /* Empty? */
+ if (extra && !*filename) {
+ fprintf(stderr, "%s: empty filename\n", argv0);
+ return 1;
+ }
+
+ /* Leading hyphen? */
+ if (extra && ((*filename == '-') || strstr(filename, "/-"))) {
+ fprintf(stderr, "%s: %s: leading '-' in component of filename\n", argv0, filename);
+ return 1;
+ }
+
+ /* Nonportable character? */
+#ifdef SYSTEM_CHARACTER_SET
+ character_set = "/"SYSTEM_CHARACTER_SET;
+#else
+ character_set = 0;
+#endif
+ if (most)
+ character_set = "/"PORTABLE_CHARACTER_SET;
+ if (character_set && *(invalid = filename + strspn(filename, character_set))) {
+ for (invalid_end = invalid + 1; *invalid_end & 0x80; invalid_end++);
+ fprintf(stderr, "%s: %s: ", argv0, filename);
+ *invalid_end = 0;
+ fprintf(stderr, "nonportable character '%s'\n", invalid);
+ return 1;
+ }
+
+ /* Symlink error? Non-searchable directory? */
+ if (lstat(filename, &_attr) && errno != ENOENT) {
+ /* lstat rather than stat, so that if filename is a bad symlink, but
+ * all parents are OK, no error will be detected. */
+ fprintf(stderr, "%s: %s: %s\n", argv0, filename, strerror(errno));
+ return 1;
+ }
+
+ /* Too long pathname? */
+ maxlen = most ? _POSIX_PATH_MAX : PATH_MAX;
+ if (strlen(filename) >= maxlen) {
+ fprintf(stderr, "%s: %s: is longer than %zu bytes\n",
+ argv0, filename, maxlen);
+ return 1;
+ }
+
+ /* Too long component? */
+ maxlen = most ? _POSIX_NAME_MAX : NAME_MAX;
+ for (p = filename; p; p = q) {
+ q = strchr(p, '/');
+ len = q ? (size_t)(q++ - p) : strlen(p);
+ if (len > maxlen) {
+ fprintf(stderr, "%s: %s: includes component longer than %zu bytes\n",
+ argv0, filename, maxlen);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+ int ret = 0;
+
+ ARGBEGIN {
+ case 'p':
+ most = 1;
+ break;
+ case 'P':
+ extra = 1;
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (!argc)
+ usage();
+
+ for (; argc--; argv++)
+ ret |= pathchk(*argv);
+
+ return ret;
+}
