1 /* $NetBSD: quotaon.c,v 1.31 2022/04/26 15:39:00 hannken Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Robert Elz at The University of Melbourne.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #ifndef lint
37 __COPYRIGHT("@(#) Copyright (c) 1980, 1990, 1993\
38 The Regents of the University of California. All rights reserved.");
39 #endif /* not lint */
40
41 #ifndef lint
42 #if 0
43 static char sccsid[] = "@(#)quotaon.c 8.1 (Berkeley) 6/6/93";
44 #else
45 __RCSID("$NetBSD: quotaon.c,v 1.31 2022/04/26 15:39:00 hannken Exp $");
46 #endif
47 #endif /* not lint */
48
49 /*
50 * Turn quota on/off for a filesystem.
51 */
52 #include <sys/param.h>
53 #include <sys/file.h>
54 #include <sys/mount.h>
55
56 #include <quota.h>
57 #include <ufs/ufs/quota1.h>
58
59 #include <err.h>
60 #include <fstab.h>
61 #include <stdio.h>
62 #include <errno.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <unistd.h>
66 #include <util.h>
67
68
69 static int vflag; /* verbose */
70
71 static void usage(void) __dead;
72 static int quotaonoff(struct fstab *, struct quotahandle *, int, int, int,
73 const char *);
74 static int readonly(struct fstab *, const char *);
75 static int oneof(const char *target, char *list[], int cnt);
76
77 int
main(int argc,char * argv[])78 main(int argc, char *argv[])
79 {
80 struct fstab *fs;
81 struct quotahandle *qh;
82 long argnum, done = 0;
83 int i, offmode = 0, errs = 0;
84 unsigned restrictions;
85 int ch;
86
87 int aflag = 0; /* all file systems */
88 int gflag = 0; /* operate on group quotas */
89 int uflag = 0; /* operate on user quotas */
90 int noguflag = 0; /* operate on both (by default) */
91
92 if (strcmp(getprogname(), "quotaoff") == 0)
93 offmode++;
94 else if (strcmp(getprogname(), "quotaon") != 0)
95 errx(1, "Name must be quotaon or quotaoff");
96
97 while ((ch = getopt(argc, argv, "avug")) != -1) {
98 switch(ch) {
99 case 'a':
100 aflag++;
101 break;
102 case 'g':
103 gflag++;
104 break;
105 case 'u':
106 uflag++;
107 break;
108 case 'v':
109 vflag++;
110 break;
111 default:
112 usage();
113 break;
114 }
115 }
116 argc -= optind;
117 argv += optind;
118
119 if (argc <= 0 && !aflag)
120 usage();
121
122 if (!gflag && !uflag) {
123 noguflag = 1;
124 }
125
126 /*
127 * XXX at the moment quota_open also uses getfsent(), but it
128 * uses it only up front. To avoid conflicting with it, let it
129 * initialize first.
130 */
131 qh = quota_open("/");
132 if (qh != NULL) {
133 quota_close(qh);
134 }
135
136 setfsent();
137 while ((fs = getfsent()) != NULL) {
138 char buf[MAXPATHLEN];
139 const char *fsspec;
140 if ((strcmp(fs->fs_vfstype, "ffs") &&
141 strcmp(fs->fs_vfstype, "lfs")) ||
142 strcmp(fs->fs_type, FSTAB_RW))
143 continue;
144
145 fsspec = getfsspecname(buf, sizeof(buf), fs->fs_spec);
146 if (fsspec == NULL) {
147 warn("%s", buf);
148 continue;
149 }
150 if (!aflag) {
151 if ((argnum = oneof(fs->fs_file, argv, argc)) < 0 &&
152 (argnum = oneof(fsspec, argv, argc)) < 0) {
153 continue;
154 }
155 done |= 1U << argnum;
156 }
157
158 qh = quota_open(fs->fs_file);
159 if (qh == NULL) {
160 if (!aflag) {
161 warn("quota_open");
162 errs++;
163 }
164 continue;
165 }
166
167 restrictions = quota_getrestrictions(qh);
168 if ((restrictions & QUOTA_RESTRICT_NEEDSQUOTACHECK) == 0) {
169 /* Not a quota v1 volume, skip it */
170 if (!aflag) {
171 errno = EBUSY;
172 warn("%s", fs->fs_file);
173 errs++;
174 }
175 quota_close(qh);
176 continue;
177 }
178
179 /*
180 * The idea here is to warn if someone explicitly
181 * tries to turn on group quotas and there are no
182 * group quotas, and likewise for user quotas, but not
183 * to warn if just doing the default thing and one of
184 * the quota types isn't configured.
185 */
186
187 if (noguflag) {
188 errs += quotaonoff(fs, qh, offmode, GRPQUOTA, 0, fsspec);
189 errs += quotaonoff(fs, qh, offmode, USRQUOTA, 0, fsspec);
190 }
191 if (gflag) {
192 errs += quotaonoff(fs, qh, offmode, GRPQUOTA, 1, fsspec);
193 }
194 if (uflag) {
195 errs += quotaonoff(fs, qh, offmode, USRQUOTA, 1, fsspec);
196 }
197 quota_close(qh);
198 }
199 endfsent();
200 for (i = 0; i < argc; i++)
201 if ((done & (1U << i)) == 0)
202 warnx("%s not found in fstab", argv[i]);
203 return errs;
204 }
205
206 static void
usage(void)207 usage(void)
208 {
209 const char *p = getprogname();
210 (void) fprintf(stderr, "Usage: %s [-g] [-u] [-v] -a\n"
211 "\t%s [-g] [-u] [-v] filesys ...\n", p, p);
212 exit(1);
213 }
214
215 static int
quotaonoff(struct fstab * fs,struct quotahandle * qh,int offmode,int idtype,int warn_on_enxio,const char * fsspec)216 quotaonoff(struct fstab *fs, struct quotahandle *qh, int offmode, int idtype,
217 int warn_on_enxio, const char *fsspec)
218 {
219 const char *mode = (offmode == 1) ? "off" : "on";
220 const char *type;
221
222 if (strcmp(fs->fs_file, "/") && readonly(fs, fsspec)) {
223 return 1;
224 }
225
226 if (offmode) {
227 type = quota_idtype_getname(qh, idtype);
228 if (quota_quotaoff(qh, idtype)) {
229 if (warn_on_enxio || errno != ENXIO) {
230 warn("quota%s for %s", mode, fs->fs_file);
231 }
232 return 1;
233 }
234 } else {
235 if (quota_quotaon(qh, idtype)) {
236 if (warn_on_enxio || errno != ENXIO) {
237 warn("quota%s for %s", mode, fs->fs_file);
238 }
239 return 1;
240 }
241 type = quota_idtype_getname(qh, idtype);
242 }
243
244 if (vflag) {
245 printf("%s: %s quotas turned %s\n",
246 fs->fs_file, type, mode);
247 }
248 return 0;
249 }
250
251 /*
252 * Verify file system is mounted and not readonly.
253 */
254 static int
readonly(struct fstab * fs,const char * fsspec)255 readonly(struct fstab *fs, const char *fsspec)
256 {
257 struct statvfs fsbuf;
258
259 if (statvfs(fs->fs_file, &fsbuf) < 0 ||
260 strcmp(fsbuf.f_mntonname, fs->fs_file) ||
261 strcmp(fsbuf.f_mntfromname, fsspec)) {
262 printf("%s: not mounted\n", fs->fs_file);
263 return 1;
264 }
265 if (fsbuf.f_flag & MNT_RDONLY) {
266 printf("%s: mounted read-only\n", fs->fs_file);
267 return 1;
268 }
269 return 0;
270 }
271
272 /*
273 * Check to see if target appears in list of size cnt.
274 */
275 static int
oneof(const char * target,char * list[],int cnt)276 oneof(const char *target, char *list[], int cnt)
277 {
278 int i;
279
280 for (i = 0; i < cnt; i++)
281 if (strcmp(target, list[i]) == 0)
282 return i;
283 return -1;
284 }
285