1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <mntent.h>
30 #include <string.h>
31
32 #include "private/ThreadLocalBuffer.h"
33
34 static ThreadLocalBuffer<mntent> g_getmntent_mntent_tls_buffer;
35 static ThreadLocalBuffer<char, BUFSIZ> g_getmntent_strings_tls_buffer;
36
getmntent(FILE * fp)37 mntent* getmntent(FILE* fp) {
38 return getmntent_r(fp, g_getmntent_mntent_tls_buffer.get(),
39 g_getmntent_strings_tls_buffer.get(),
40 g_getmntent_strings_tls_buffer.size());
41 }
42
getmntent_r(FILE * fp,struct mntent * e,char * buf,int buf_len)43 mntent* getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len) {
44 memset(e, 0, sizeof(*e));
45 while (fgets(buf, buf_len, fp) != NULL) {
46 // Entries look like "proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0".
47 // That is: mnt_fsname mnt_dir mnt_type mnt_opts 0 0.
48 int fsname0, fsname1, dir0, dir1, type0, type1, opts0, opts1;
49 if (sscanf(buf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d",
50 &fsname0, &fsname1, &dir0, &dir1, &type0, &type1, &opts0, &opts1,
51 &e->mnt_freq, &e->mnt_passno) == 2) {
52 e->mnt_fsname = &buf[fsname0];
53 buf[fsname1] = '\0';
54
55 e->mnt_dir = &buf[dir0];
56 buf[dir1] = '\0';
57
58 e->mnt_type = &buf[type0];
59 buf[type1] = '\0';
60
61 e->mnt_opts = &buf[opts0];
62 buf[opts1] = '\0';
63
64 return e;
65 }
66 }
67 return NULL;
68 }
69
setmntent(const char * path,const char * mode)70 FILE* setmntent(const char* path, const char* mode) {
71 return fopen(path, mode);
72 }
73
endmntent(FILE * fp)74 int endmntent(FILE* fp) {
75 if (fp != NULL) {
76 fclose(fp);
77 }
78 return 1;
79 }
80