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 */
_create_dir_recursive(const char * dir)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
dm_create_dir(const char * dir)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
dm_fclose(FILE * stream)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