1 /*
2 * Copyright (C) 2002-2015 Paul Davis <paul@linuxaudiosystems.com>
3 * Copyright (C) 2008-2009 David Robillard <d@drobilla.net>
4 * Copyright (C) 2013 John Emmas <john@creativepost.co.uk>
5 * Copyright (C) 2014-2015 Robin Gareus <robin@gareus.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 */
21 #ifndef COMPILER_MSVC
22 #include <cstdio>
23 #include <cstring>
24 #include <string>
25 #include <cstring>
26 #include <limits.h>
27
28 #include "pbd/mountpoint.h"
29
30 using std::string;
31
32 #ifdef WAF_BUILD
33 #include "libpbd-config.h"
34 #endif
35
36 #ifdef HAVE_GETMNTENT
37 #include <mntent.h>
38
39 struct mntent_sorter {
operator ()mntent_sorter40 bool operator() (const mntent *a, const mntent *b) {
41 return strcmp (a->mnt_dir, b->mnt_dir);
42 }
43 };
44
45 string
mountpoint(string path)46 mountpoint (string path)
47 {
48 FILE *mntf;
49 mntent *mnt;
50 unsigned int maxmatch = 0;
51 unsigned int matchlen;
52 const char *cpath = path.c_str();
53 char best[PATH_MAX+1];
54
55 if ((mntf = setmntent ("/etc/mtab", "r")) == 0) {
56 return "";
57 }
58
59 best[0] = '\0';
60
61 while ((mnt = getmntent (mntf))) {
62 unsigned int n;
63
64 n = 0;
65 matchlen = 0;
66
67 /* note: strcmp's semantics are not
68 strict enough to use for this.
69 */
70
71 while (cpath[n] && mnt->mnt_dir[n]) {
72 if (cpath[n] != mnt->mnt_dir[n]) {
73 break;
74 }
75 matchlen++;
76 n++;
77 }
78
79 if (cpath[matchlen] == '\0') {
80
81 endmntent (mntf);
82 return mnt->mnt_dir;
83
84 } else {
85
86 if (matchlen > maxmatch) {
87 snprintf (best, sizeof(best), "%s", mnt->mnt_dir);
88 maxmatch = matchlen;
89 }
90 }
91 }
92
93 endmntent (mntf);
94
95 return best;
96 }
97
98 #elif defined(PLATFORM_WINDOWS)
99 #include <assert.h>
100 string
mountpoint(string path)101 mountpoint (string path)
102 {
103 /* this function is currently only called from 'old_peak_path()'
104 * via find_broken_peakfile() - only relevant for loading pre
105 * libsndfile Ardour 2.0 sessions.
106 */
107 assert(0);
108 return ""; // TODO ... if needed
109 }
110
111 #else // !HAVE_GETMNTENT
112
113 #include <sys/param.h>
114 #include <sys/ucred.h>
115 #include <sys/mount.h>
116
117 string
mountpoint(string path)118 mountpoint (string path)
119 {
120 #if defined(__NetBSD__)
121 struct statvfs *mntbufp = 0;
122 #else
123 struct statfs *mntbufp = 0;
124 #endif
125 int count;
126 unsigned int maxmatch = 0;
127 unsigned int matchlen;
128 const char *cpath = path.c_str();
129 char best[PATH_MAX+1];
130
131 /* From the manpage, under "BUGS" : "The memory allocated by getmntinfo() cannot be free(3)'d by the
132 application."
133
134 Thus: we do NOT try to free memory allocated by getmntinfo()
135 */
136
137 if ((count = getmntinfo(&mntbufp, MNT_NOWAIT)) == 0) {
138 return "\0";
139 }
140
141 best[0] = '\0';
142
143 for (int i = 0; i < count; ++i) {
144 unsigned int n = 0;
145 matchlen = 0;
146
147 /* note: strcmp's semantics are not
148 strict enough to use for this.
149 */
150
151 while (cpath[n] && mntbufp[i].f_mntonname[n]) {
152 if (cpath[n] != mntbufp[i].f_mntonname[n]) {
153 break;
154 }
155 matchlen++;
156 n++;
157 }
158
159 if (cpath[matchlen] == '\0') {
160 snprintf(best, sizeof(best), "%s", mntbufp[i].f_mntonname);
161 return best;
162
163 } else {
164
165 if (matchlen > maxmatch) {
166 snprintf (best, sizeof(best), "%s", mntbufp[i].f_mntonname);
167 maxmatch = matchlen;
168 }
169 }
170 }
171
172 return best;
173 }
174 #endif // HAVE_GETMNTENT
175
176 #ifdef TEST_MOUNTPOINT
177
main(int argc,char * argv[])178 main (int argc, char *argv[])
179 {
180 printf ("mp of %s = %s\n", argv[1], mountpoint (argv[1]).c_str());
181 exit (0);
182 }
183
184 #endif // TEST_MOUNTPOINT
185
186 #else // COMPILER_MSVC
187 const char* pbd_mountpoint = "pbd/msvc/mountpoint.cc takes precedence over this file";
188 #endif // COMPILER_MSVC
189