165 lines
3.0 KiB
C++
165 lines
3.0 KiB
C++
/*
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Copyright (C) 2002 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <cstdio>
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#include <cstring>
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#include <string>
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#include <cstring>
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#include <limits.h>
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#include <pbd/mountpoint.h>
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using std::string;
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#ifdef HAVE_WAFCONFIG_H
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#include "wafconfig.h"
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#endif
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#if HAVE_GETMNTENT
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#include <mntent.h>
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struct mntent_sorter {
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bool operator() (const mntent *a, const mntent *b) {
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return strcmp (a->mnt_dir, b->mnt_dir);
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}
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};
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string
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mountpoint (string path)
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{
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FILE *mntf;
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mntent *mnt;
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unsigned int maxmatch = 0;
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unsigned int matchlen;
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const char *cpath = path.c_str();
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char best[PATH_MAX+1];
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if ((mntf = setmntent ("/etc/mtab", "r")) == 0) {
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return "";
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}
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best[0] = '\0';
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while ((mnt = getmntent (mntf))) {
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unsigned int n;
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n = 0;
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matchlen = 0;
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/* note: strcmp's semantics are not
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strict enough to use for this.
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*/
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while (cpath[n] && mnt->mnt_dir[n]) {
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if (cpath[n] != mnt->mnt_dir[n]) {
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break;
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}
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matchlen++;
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n++;
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}
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if (cpath[matchlen] == '\0') {
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endmntent (mntf);
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return mnt->mnt_dir;
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} else {
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if (matchlen > maxmatch) {
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snprintf (best, sizeof(best), "%s", mnt->mnt_dir);
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maxmatch = matchlen;
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}
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}
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}
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endmntent (mntf);
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return best;
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}
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#else // !HAVE_GETMNTENT
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#include <sys/param.h>
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#include <sys/ucred.h>
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#include <sys/mount.h>
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string
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mountpoint (string path)
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{
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struct statfs *mntbufp = 0;
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int count;
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unsigned int maxmatch = 0;
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unsigned int matchlen;
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const char *cpath = path.c_str();
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char best[PATH_MAX+1];
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if ((count = getmntinfo(&mntbufp, MNT_NOWAIT)) == 0) {
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free(mntbufp);
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return "\0";
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}
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best[0] = '\0';
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for (int i = 0; i < count; ++i) {
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unsigned int n = 0;
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matchlen = 0;
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/* note: strcmp's semantics are not
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strict enough to use for this.
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*/
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while (cpath[n] && mntbufp[i].f_mntonname[n]) {
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if (cpath[n] != mntbufp[i].f_mntonname[n]) {
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break;
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}
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matchlen++;
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n++;
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}
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if (cpath[matchlen] == '\0') {
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snprintf(best, sizeof(best), "%s", mntbufp[i].f_mntonname);
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free(mntbufp);
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return best;
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} else {
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if (matchlen > maxmatch) {
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snprintf (best, sizeof(best), "%s", mntbufp[i].f_mntonname);
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maxmatch = matchlen;
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}
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}
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}
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free(mntbufp);
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return best;
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}
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#endif // HAVE_GETMNTENT
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#ifdef TEST_MOUNTPOINT
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main (int argc, char *argv[])
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{
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printf ("mp of %s = %s\n", argv[1], mountpoint (argv[1]).c_str());
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exit (0);
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}
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#endif // TEST_MOUNTPOINT
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