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