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/*
* realpath -- canonicalize pathnames, resolving symlinks
*
* usage: realpath [-csv] pathname [pathname...]
*
* options: -c check whether or not each resolved path exists
* -s no output, exit status determines whether path is valid
* -v produce verbose output
*
*
* exit status: 0 if all pathnames resolved
* 1 if any of the pathname arguments could not be resolved
*
*
* Bash loadable builtin version
*
* Chet Ramey
* chet@po.cwru.edu
*/
/*
Copyright (C) 1999-2009 Free Software Foundation, Inc.
This file is part of GNU Bash.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "bashansi.h"
#include <maxpath.h>
#include <errno.h>
#include "builtins.h"
#include "shell.h"
#include "bashgetopt.h"
#include "common.h"
#ifndef errno
extern int errno;
#endif
extern char *sh_realpath();
int
realpath_builtin(list)
WORD_LIST *list;
{
int opt, cflag, vflag, sflag, es;
char *r, realbuf[PATH_MAX], *p;
struct stat sb;
if (list == 0) {
builtin_usage();
return (EX_USAGE);
}
vflag = cflag = sflag = 0;
reset_internal_getopt();
while ((opt = internal_getopt (list, "csv")) != -1) {
switch (opt) {
case 'c':
cflag = 1;
break;
case 's':
sflag = 1;
break;
case 'v':
vflag = 1;
break;
CASE_HELPOPT;
default:
builtin_usage();
return (EX_USAGE);
}
}
list = loptend;
if (list == 0) {
builtin_usage();
return (EX_USAGE);
}
for (es = EXECUTION_SUCCESS; list; list = list->next) {
p = list->word->word;
r = sh_realpath(p, realbuf);
if (r == 0) {
es = EXECUTION_FAILURE;
if (sflag == 0)
builtin_error("%s: cannot resolve: %s", p, strerror(errno));
continue;
}
if (cflag && (stat(realbuf, &sb) < 0)) {
es = EXECUTION_FAILURE;
if (sflag == 0)
builtin_error("%s: %s", p, strerror(errno));
continue;
}
if (sflag == 0) {
if (vflag)
printf ("%s -> ", p);
printf("%s\n", realbuf);
}
}
return es;
}
char *realpath_doc[] = {
"Display pathname in canonical form.",
"",
"Display the canonicalized version of each PATHNAME argument, resolving",
"symbolic links. The -c option checks whether or not each resolved name",
"exists. The -s option produces no output; the exit status determines the",
"validity of each PATHNAME. The -v option produces verbose output. The",
"exit status is 0 if each PATHNAME was resolved; non-zero otherwise.",
(char *)NULL
};
struct builtin realpath_struct = {
"realpath", /* builtin name */
realpath_builtin, /* function implementing the builtin */
BUILTIN_ENABLED, /* initial flags for builtin */
realpath_doc, /* array of long documentation strings */
"realpath [-csv] pathname [pathname...]", /* usage synopsis */
0 /* reserved for internal use */
};
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