mkdir_recursive: keep original prototype
[lttng-tools.git] / ltt-sessiond / utils.c
1 /*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
7 * of the License.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 #define _GNU_SOURCE
20 #include <errno.h>
21 #include <limits.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <sys/types.h>
26 #include <sys/stat.h>
27 #include <unistd.h>
28
29 #include "utils.h"
30
31 /*
32 * get_home_dir
33 *
34 * Return pointer to home directory path using the env variable HOME.
35 * No home, NULL is returned.
36 */
37 const char *get_home_dir(void)
38 {
39 return ((const char *) getenv("HOME"));
40 }
41
42 /*
43 * mkdir_recursive
44 *
45 * Create recursively directory using the FULL path.
46 */
47 int mkdir_recursive(const char *path, mode_t mode)
48 {
49 int ret;
50 char *p, tmp[PATH_MAX];
51 size_t len;
52 mode_t old_umask;
53
54 ret = snprintf(tmp, sizeof(tmp), "%s", path);
55 if (ret < 0) {
56 perror("snprintf mkdir");
57 goto error;
58 }
59
60 len = ret;
61 if (tmp[len - 1] == '/') {
62 tmp[len - 1] = 0;
63 }
64
65 old_umask = umask(0);
66 for (p = tmp + 1; *p; p++) {
67 if (*p == '/') {
68 *p = 0;
69 ret = mkdir(tmp, mode);
70 if (ret < 0) {
71 if (!(errno == EEXIST)) {
72 perror("mkdir recursive");
73 ret = errno;
74 goto umask_error;
75 }
76 }
77 *p = '/';
78 }
79 }
80
81 ret = mkdir(tmp, mode);
82 if (ret < 0) {
83 ret = errno;
84 }
85
86 umask_error:
87 umask(old_umask);
88 error:
89 return ret;
90 }
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