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      1 /*	$NetBSD: libdm-file.c,v 1.2 2011/01/05 14:57:28 haad Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
      5  * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
      6  *
      7  * This file is part of the device-mapper userspace tools.
      8  *
      9  * This copyrighted material is made available to anyone wishing to use,
     10  * modify, copy, or redistribute it subject to the terms and conditions
     11  * of the GNU Lesser General Public License v.2.1.
     12  *
     13  * You should have received a copy of the GNU Lesser General Public License
     14  * along with this program; if not, write to the Free Software Foundation,
     15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     16  */
     17 
     18 #include "dmlib.h"
     19 
     20 #include <sys/file.h>
     21 #include <fcntl.h>
     22 #include <dirent.h>
     23 
     24 /*
     25  * Created directories permissions are controled by umask values and
     26  * they should be set by api user before calling this function.
     27  * Changing directory owners is also left on caller.
     28  */
     29 static int _create_dir_recursive(const char *dir)
     30 {
     31 	char *orig, *s;
     32 	int rc, r = 0;
     33 
     34 	log_verbose("Creating directory \"%s\"", dir);
     35 	/* Create parent directories */
     36 	orig = s = dm_strdup(dir);
     37 	while ((s = strchr(s, '/')) != NULL) {
     38 		*s = '\0';
     39 		if (*orig) {
     40 			rc = mkdir(orig, 0777);
     41 			if (rc < 0 && errno != EEXIST) {
     42 				if (errno != EROFS)
     43 					log_sys_error("mkdir", orig);
     44 				goto out;
     45 			}
     46 		}
     47 		*s++ = '/';
     48 	}
     49 
     50 	/* Create final directory */
     51 	rc = mkdir(dir, 0777);
     52 	if (rc < 0 && errno != EEXIST) {
     53 		if (errno != EROFS)
     54 			log_sys_error("mkdir", orig);
     55 		goto out;
     56 	}
     57 
     58 	r = 1;
     59 out:
     60 	dm_free(orig);
     61 	return r;
     62 }
     63 
     64 int dm_create_dir(const char *dir)
     65 {
     66 	struct stat info;
     67 
     68 	if (!*dir)
     69 		return 1;
     70 
     71 	if (stat(dir, &info) < 0)
     72 		return _create_dir_recursive(dir);
     73 
     74 	if (S_ISDIR(info.st_mode))
     75 		return 1;
     76 
     77 	log_error("Directory \"%s\" not found", dir);
     78 	return 0;
     79 }
     80 
     81 int dm_fclose(FILE *stream)
     82 {
     83 	int prev_fail = ferror(stream);
     84 	int fclose_fail = fclose(stream);
     85 
     86 	/* If there was a previous failure, but fclose succeeded,
     87 	   clear errno, since ferror does not set it, and its value
     88 	   may be unrelated to the ferror-reported failure.  */
     89 	if (prev_fail && !fclose_fail)
     90 		errno = 0;
     91 
     92 	return prev_fail || fclose_fail ? EOF : 0;
     93 }
     94