146 lines
3 KiB
C
146 lines
3 KiB
C
/*
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* pathsearch.c: $PATH-searching functions.
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*
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* Copyright (C) 2004, 2007, 2008, 2009, 2011 Colin Watson.
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*
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* This file is part of man-db.
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*
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* man-db is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* man-db is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with man-db; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif /* HAVE_CONFIG_H */
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#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "gettext.h"
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#define _(String) gettext (String)
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#include "xalloc.h"
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#include "xgetcwd.h"
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#include "xvasprintf.h"
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#include "manconfig.h"
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#include "fatal.h"
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#include "pathsearch.h"
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static bool pathsearch (const char *name, const mode_t bits)
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{
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char *cwd = NULL;
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char *path = getenv ("PATH");
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char *pathtok;
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const char *element;
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struct stat st;
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bool ret = false;
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if (!path)
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/* Eh? Oh well. */
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return false;
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if (strchr (name, '/')) {
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/* Qualified name; look directly. */
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if (stat (name, &st) == -1)
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return false;
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if (S_ISREG (st.st_mode) && (st.st_mode & bits))
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return true;
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return false;
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}
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pathtok = path = xstrdup (path);
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/* Unqualified name; iterate over $PATH looking for it. */
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for (element = strsep (&pathtok, ":"); element;
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element = strsep (&pathtok, ":")) {
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char *filename;
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if (!*element) {
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if (!cwd)
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cwd = xgetcwd ();
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if (!cwd)
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fatal (errno, _ ("can't determine current "
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"directory"));
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element = cwd;
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}
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filename = xasprintf ("%s/%s", element, name);
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assert (filename);
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if (stat (filename, &st) == -1) {
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free (filename);
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continue;
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}
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free (filename);
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if (S_ISREG (st.st_mode) && (st.st_mode & bits)) {
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ret = true;
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break;
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}
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}
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free (path);
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free (cwd);
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return ret;
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}
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bool pathsearch_executable (const char *name)
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{
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return pathsearch (name, 0111);
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}
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bool directory_on_path (const char *dir)
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{
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char *cwd = NULL;
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char *path = getenv ("PATH");
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char *pathtok;
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const char *element;
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bool ret = false;
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if (!path)
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/* Eh? Oh well. */
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return false;
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pathtok = path = xstrdup (path);
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for (element = strsep (&pathtok, ":"); element;
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element = strsep (&pathtok, ":")) {
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if (!*element) {
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if (!cwd)
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cwd = xgetcwd ();
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if (!cwd)
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fatal (errno, _ ("can't determine current "
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"directory"));
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element = cwd;
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}
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if (STREQ (element, dir)) {
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ret = true;
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break;
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}
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}
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free (path);
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free (cwd);
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return ret;
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}
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