Add pathchk(1)

New command, including man page.
UTF-8 compatible and should be POSIX-compliant.

Signed-off-by: Mattias Andrée <maandree@kth.se>
This commit is contained in:
Mattias Andrée 2016-02-03 20:12:26 +01:00 committed by sin
parent cfc37be486
commit b445614f70
6 changed files with 161 additions and 1 deletions

View File

@ -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>

View File

@ -120,6 +120,7 @@ BIN =\
nl\
nohup\
od\
pathchk\
paste\
printenv\
printf\

1
README
View File

@ -58,6 +58,7 @@ The following tools are implemented:
#*|o nl .
=*|o nohup .
=*|o od .
#* o pathchk .
#*|o paste .
=*|x printenv .
#*|o printf .

1
TODO
View File

@ -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

35
pathchk.1 Normal file
View File

@ -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.

123
pathchk.c Normal file
View File

@ -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;
}