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/*
* pathsearch.c: $PATH-searching functions.
*
* Copyright (C) 2004, 2007, 2008, 2009, 2011 Colin Watson.
*
* This file is part of man-db.
*
* man-db 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 2 of the License, or
* (at your option) any later version.
*
* man-db 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 man-db; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "gettext.h"
#define _(String) gettext (String)
#include "xalloc.h"
#include "xgetcwd.h"
#include "xvasprintf.h"
#include "manconfig.h"
#include "fatal.h"
#include "pathsearch.h"
static bool pathsearch (const char *name, const mode_t bits)
{
char *cwd = NULL;
char *path = getenv ("PATH");
char *pathtok;
const char *element;
struct stat st;
bool ret = false;
if (!path)
/* Eh? Oh well. */
return false;
if (strchr (name, '/')) {
/* Qualified name; look directly. */
if (stat (name, &st) == -1)
return false;
if (S_ISREG (st.st_mode) && (st.st_mode & bits))
return true;
return false;
}
pathtok = path = xstrdup (path);
/* Unqualified name; iterate over $PATH looking for it. */
for (element = strsep (&pathtok, ":"); element;
element = strsep (&pathtok, ":")) {
char *filename;
if (!*element) {
if (!cwd)
cwd = xgetcwd ();
if (!cwd)
fatal (errno,
_("can't determine current directory"));
element = cwd;
}
filename = xasprintf ("%s/%s", element, name);
assert (filename);
if (stat (filename, &st) == -1) {
free (filename);
continue;
}
free (filename);
if (S_ISREG (st.st_mode) && (st.st_mode & bits)) {
ret = true;
break;
}
}
free (path);
free (cwd);
return ret;
}
bool pathsearch_executable (const char *name)
{
return pathsearch (name, 0111);
}
bool directory_on_path (const char *dir)
{
char *cwd = NULL;
char *path = getenv ("PATH");
char *pathtok;
const char *element;
bool ret = false;
if (!path)
/* Eh? Oh well. */
return false;
pathtok = path = xstrdup (path);
for (element = strsep (&pathtok, ":"); element;
element = strsep (&pathtok, ":")) {
if (!*element) {
if (!cwd)
cwd = xgetcwd ();
if (!cwd)
fatal (errno,
_("can't determine current directory"));
element = cwd;
}
if (STREQ (element, dir)) {
ret = true;
break;
}
}
free (path);
free (cwd);
return ret;
}
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