121c1c48aSSascha Wildner /*
221c1c48aSSascha Wildner * Copyright (c) 2004 The DragonFly Project. All rights reserved.
321c1c48aSSascha Wildner *
421c1c48aSSascha Wildner * This code is derived from software contributed to The DragonFly Project
521c1c48aSSascha Wildner * by Chris Pressey <cpressey@catseye.mine.nu>.
621c1c48aSSascha Wildner *
721c1c48aSSascha Wildner * Redistribution and use in source and binary forms, with or without
821c1c48aSSascha Wildner * modification, are permitted provided that the following conditions
921c1c48aSSascha Wildner * are met:
1021c1c48aSSascha Wildner *
1121c1c48aSSascha Wildner * 1. Redistributions of source code must retain the above copyright
1221c1c48aSSascha Wildner * notice, this list of conditions and the following disclaimer.
1321c1c48aSSascha Wildner * 2. Redistributions in binary form must reproduce the above copyright
1421c1c48aSSascha Wildner * notice, this list of conditions and the following disclaimer in
1521c1c48aSSascha Wildner * the documentation and/or other materials provided with the
1621c1c48aSSascha Wildner * distribution.
1721c1c48aSSascha Wildner * 3. Neither the name of The DragonFly Project nor the names of its
1821c1c48aSSascha Wildner * contributors may be used to endorse or promote products derived
1921c1c48aSSascha Wildner * from this software without specific, prior written permission.
2021c1c48aSSascha Wildner *
2121c1c48aSSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
2221c1c48aSSascha Wildner * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
2321c1c48aSSascha Wildner * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
2421c1c48aSSascha Wildner * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
2521c1c48aSSascha Wildner * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
2621c1c48aSSascha Wildner * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
2721c1c48aSSascha Wildner * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
2821c1c48aSSascha Wildner * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
2921c1c48aSSascha Wildner * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
3021c1c48aSSascha Wildner * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
3121c1c48aSSascha Wildner * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3221c1c48aSSascha Wildner * SUCH DAMAGE.
3321c1c48aSSascha Wildner */
3421c1c48aSSascha Wildner
3521c1c48aSSascha Wildner
3621c1c48aSSascha Wildner /*
3721c1c48aSSascha Wildner * fspred.c
3821c1c48aSSascha Wildner * Filesystem predicates.
39d3d461a5SAntonio Huete Jimenez * $Id: fspred.c,v 1.3 2005/02/10 03:33:49 cpressey Exp $
4021c1c48aSSascha Wildner */
4121c1c48aSSascha Wildner
4221c1c48aSSascha Wildner #include <sys/stat.h>
4321c1c48aSSascha Wildner #include <sys/param.h>
4421c1c48aSSascha Wildner #include <sys/ucred.h>
4521c1c48aSSascha Wildner #include <sys/mount.h>
4621c1c48aSSascha Wildner
4721c1c48aSSascha Wildner #include <stdarg.h>
4821c1c48aSSascha Wildner #include <stdio.h>
4921c1c48aSSascha Wildner #include <stdlib.h>
5021c1c48aSSascha Wildner #include <string.h>
51eb5e0aceSAntonio Huete Jimenez #include <unistd.h>
5221c1c48aSSascha Wildner
5321c1c48aSSascha Wildner #include "fspred.h"
5421c1c48aSSascha Wildner
5521c1c48aSSascha Wildner /** PREDICATES **/
5621c1c48aSSascha Wildner
57eb5e0aceSAntonio Huete Jimenez static void
vstatmod(mode_t * m,int * error,const char * fmt,va_list args)58*bc11e143SAntonio Huete Jimenez vstatmod(mode_t *m, int *error, const char *fmt, va_list args)
59eb5e0aceSAntonio Huete Jimenez {
60eb5e0aceSAntonio Huete Jimenez char *filename;
61eb5e0aceSAntonio Huete Jimenez struct stat sb;
62eb5e0aceSAntonio Huete Jimenez
63eb5e0aceSAntonio Huete Jimenez memset(&sb, 0, sizeof(sb));
64eb5e0aceSAntonio Huete Jimenez
659571bf02SAntonio Huete Jimenez vasprintf(&filename, fmt, args);
66eb5e0aceSAntonio Huete Jimenez
67eb5e0aceSAntonio Huete Jimenez *error = stat(filename, &sb);
68eb5e0aceSAntonio Huete Jimenez free(filename);
69eb5e0aceSAntonio Huete Jimenez
70eb5e0aceSAntonio Huete Jimenez if (*error)
71eb5e0aceSAntonio Huete Jimenez *m = 0; /* Do not leak fake mode */
72eb5e0aceSAntonio Huete Jimenez else
73eb5e0aceSAntonio Huete Jimenez *m = sb.st_mode;
74eb5e0aceSAntonio Huete Jimenez }
75eb5e0aceSAntonio Huete Jimenez
7621c1c48aSSascha Wildner int
is_dir(const char * fmt,...)7721c1c48aSSascha Wildner is_dir(const char *fmt, ...)
7821c1c48aSSascha Wildner {
799571bf02SAntonio Huete Jimenez va_list args;
80eb5e0aceSAntonio Huete Jimenez int error;
81eb5e0aceSAntonio Huete Jimenez mode_t m;
8221c1c48aSSascha Wildner
839571bf02SAntonio Huete Jimenez va_start(args, fmt);
849571bf02SAntonio Huete Jimenez vstatmod(&m, &error, fmt, args);
859571bf02SAntonio Huete Jimenez va_end(args);
8621c1c48aSSascha Wildner
87eb5e0aceSAntonio Huete Jimenez if (error == 0)
88eb5e0aceSAntonio Huete Jimenez return(S_ISDIR(m));
8921c1c48aSSascha Wildner else
9021c1c48aSSascha Wildner return(0);
9121c1c48aSSascha Wildner }
9221c1c48aSSascha Wildner
9321c1c48aSSascha Wildner int
is_file(const char * fmt,...)9421c1c48aSSascha Wildner is_file(const char *fmt, ...)
9521c1c48aSSascha Wildner {
969571bf02SAntonio Huete Jimenez va_list args;
97eb5e0aceSAntonio Huete Jimenez int error;
98eb5e0aceSAntonio Huete Jimenez mode_t m;
9921c1c48aSSascha Wildner
1009571bf02SAntonio Huete Jimenez va_start(args, fmt);
1019571bf02SAntonio Huete Jimenez vstatmod(&m, &error, fmt, args);
1029571bf02SAntonio Huete Jimenez va_end(args);
10321c1c48aSSascha Wildner
104eb5e0aceSAntonio Huete Jimenez if (error == 0)
105eb5e0aceSAntonio Huete Jimenez return(S_ISREG(m) );
10621c1c48aSSascha Wildner else
10721c1c48aSSascha Wildner return(0);
108eb5e0aceSAntonio Huete Jimenez
10921c1c48aSSascha Wildner }
11021c1c48aSSascha Wildner
11121c1c48aSSascha Wildner int
is_program(const char * fmt,...)11221c1c48aSSascha Wildner is_program(const char *fmt, ...)
11321c1c48aSSascha Wildner {
11421c1c48aSSascha Wildner char *filename;
11521c1c48aSSascha Wildner struct stat sb;
1169571bf02SAntonio Huete Jimenez va_list args;
117eb5e0aceSAntonio Huete Jimenez int error;
118eb5e0aceSAntonio Huete Jimenez uid_t uid;
119eb5e0aceSAntonio Huete Jimenez gid_t gid;
12021c1c48aSSascha Wildner
1219571bf02SAntonio Huete Jimenez va_start(args, fmt);
1229571bf02SAntonio Huete Jimenez vasprintf(&filename, fmt, args);
1239571bf02SAntonio Huete Jimenez va_end(args);
12421c1c48aSSascha Wildner
125eb5e0aceSAntonio Huete Jimenez error = stat(filename, &sb);
12621c1c48aSSascha Wildner free(filename);
12721c1c48aSSascha Wildner
128eb5e0aceSAntonio Huete Jimenez uid = getuid();
129eb5e0aceSAntonio Huete Jimenez gid = getgid();
130eb5e0aceSAntonio Huete Jimenez
131eed82809SAntonio Huete Jimenez if (error == 0) {
132eb5e0aceSAntonio Huete Jimenez /* Try to be more precise when identifying executable programs.
133eb5e0aceSAntonio Huete Jimenez * Still this is subject to race conditions where the regular file
134eb5e0aceSAntonio Huete Jimenez * might have its permissions/ownership changed during the test and
135eb5e0aceSAntonio Huete Jimenez * thus provide inaccurate results.
136eb5e0aceSAntonio Huete Jimenez * Also, effective uid/gid is not being checked.
137eb5e0aceSAntonio Huete Jimenez */
138eb5e0aceSAntonio Huete Jimenez if ((S_ISREG(sb.st_mode)) &&
139eb5e0aceSAntonio Huete Jimenez ((sb.st_uid == uid && sb.st_mode & S_IXUSR) ||
140eb5e0aceSAntonio Huete Jimenez (sb.st_gid == gid && sb.st_mode & S_IXGRP) ||
141eb5e0aceSAntonio Huete Jimenez (sb.st_mode & S_IXOTH))) {
142eb5e0aceSAntonio Huete Jimenez return 1;
143eb5e0aceSAntonio Huete Jimenez }
14421c1c48aSSascha Wildner }
14521c1c48aSSascha Wildner
146eed82809SAntonio Huete Jimenez return 0;
147eed82809SAntonio Huete Jimenez }
148eed82809SAntonio Huete Jimenez
14921c1c48aSSascha Wildner int
is_device(const char * fmt,...)15021c1c48aSSascha Wildner is_device(const char *fmt, ...)
15121c1c48aSSascha Wildner {
1529571bf02SAntonio Huete Jimenez va_list args;
153eb5e0aceSAntonio Huete Jimenez int error;
154eb5e0aceSAntonio Huete Jimenez mode_t m;
15521c1c48aSSascha Wildner
1569571bf02SAntonio Huete Jimenez va_start(args, fmt);
1579571bf02SAntonio Huete Jimenez vstatmod(&m, &error, fmt, args);
1589571bf02SAntonio Huete Jimenez va_end(args);
15921c1c48aSSascha Wildner
160eb5e0aceSAntonio Huete Jimenez if (error == 0)
161eb5e0aceSAntonio Huete Jimenez return(S_ISBLK(m) || S_ISCHR(m));
16221c1c48aSSascha Wildner else
16321c1c48aSSascha Wildner return(0);
16421c1c48aSSascha Wildner }
16521c1c48aSSascha Wildner
16621c1c48aSSascha Wildner int
is_named_pipe(const char * fmt,...)16721c1c48aSSascha Wildner is_named_pipe(const char *fmt, ...)
16821c1c48aSSascha Wildner {
1699571bf02SAntonio Huete Jimenez va_list args;
170eb5e0aceSAntonio Huete Jimenez int error;
171eb5e0aceSAntonio Huete Jimenez mode_t m;
17221c1c48aSSascha Wildner
1739571bf02SAntonio Huete Jimenez va_start(args, fmt);
1749571bf02SAntonio Huete Jimenez vstatmod(&m, &error, fmt, args);
1759571bf02SAntonio Huete Jimenez va_end(args);
17621c1c48aSSascha Wildner
177eb5e0aceSAntonio Huete Jimenez if (error == 0)
178eb5e0aceSAntonio Huete Jimenez return(S_ISFIFO(m));
17921c1c48aSSascha Wildner else
18021c1c48aSSascha Wildner return(0);
18121c1c48aSSascha Wildner }
18221c1c48aSSascha Wildner
18321c1c48aSSascha Wildner int
is_mountpoint_mounted(const char * mtpt)18421c1c48aSSascha Wildner is_mountpoint_mounted(const char *mtpt)
18521c1c48aSSascha Wildner {
18621c1c48aSSascha Wildner struct statfs *mt_array, *mt_ptr;
18721c1c48aSSascha Wildner int count;
18821c1c48aSSascha Wildner
18921c1c48aSSascha Wildner count = getmntinfo(&mt_array, MNT_WAIT);
19021c1c48aSSascha Wildner for (mt_ptr = mt_array; count > 0; mt_ptr++, count--) {
1911536c7b8SAntonio Huete Jimenez if (strncmp(mt_ptr->f_mntonname, mtpt, PATH_MAX) == 0)
19221c1c48aSSascha Wildner return(1);
19321c1c48aSSascha Wildner }
19421c1c48aSSascha Wildner return(0);
19521c1c48aSSascha Wildner }
19621c1c48aSSascha Wildner
19721c1c48aSSascha Wildner int
is_device_mounted(const char * device)19821c1c48aSSascha Wildner is_device_mounted(const char *device)
19921c1c48aSSascha Wildner {
20021c1c48aSSascha Wildner struct statfs *mt_array, *mt_ptr;
20121c1c48aSSascha Wildner int count;
20221c1c48aSSascha Wildner
20321c1c48aSSascha Wildner count = getmntinfo(&mt_array, MNT_WAIT);
20421c1c48aSSascha Wildner for (mt_ptr = mt_array; count > 0; mt_ptr++, count--) {
2051536c7b8SAntonio Huete Jimenez if (strncmp(mt_ptr->f_mntfromname, device, PATH_MAX) == 0)
20621c1c48aSSascha Wildner return(1);
20721c1c48aSSascha Wildner }
20821c1c48aSSascha Wildner return(0);
20921c1c48aSSascha Wildner }
21021c1c48aSSascha Wildner
21121c1c48aSSascha Wildner int
is_any_slice_mounted(const char * diskdev)21221c1c48aSSascha Wildner is_any_slice_mounted(const char *diskdev)
21321c1c48aSSascha Wildner {
21421c1c48aSSascha Wildner struct statfs *mt_array, *mt_ptr;
21521c1c48aSSascha Wildner int count;
21621c1c48aSSascha Wildner
21721c1c48aSSascha Wildner count = getmntinfo(&mt_array, MNT_WAIT);
21821c1c48aSSascha Wildner for (mt_ptr = mt_array; count > 0; mt_ptr++, count--) {
21921c1c48aSSascha Wildner if (strstr(mt_ptr->f_mntfromname, diskdev) ==
22021c1c48aSSascha Wildner mt_ptr->f_mntfromname)
22121c1c48aSSascha Wildner return(1);
22221c1c48aSSascha Wildner }
22321c1c48aSSascha Wildner return(0);
22421c1c48aSSascha Wildner }
225