1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright (c) 1996,1998 by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate * All rights reserved.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include "dump.h"
30*0Sstevel@tonic-gate
31*0Sstevel@tonic-gate /*
32*0Sstevel@tonic-gate * File system mount table input routines. We handle a
33*0Sstevel@tonic-gate * a combination of BSD and SVR4 formats by coding functions
34*0Sstevel@tonic-gate * to explicitly read the SVR4 vfstab file and using
35*0Sstevel@tonic-gate * #define's to build a routine to read both BSD files
36*0Sstevel@tonic-gate * (fstab and mtab) and SVR4's mnttab file. Internally
37*0Sstevel@tonic-gate * we keep everything in the common (mtab/mnttab) format.
38*0Sstevel@tonic-gate */
39*0Sstevel@tonic-gate static struct pmntent {
40*0Sstevel@tonic-gate struct mntent *pm_mnt;
41*0Sstevel@tonic-gate struct pmntent *pm_next;
42*0Sstevel@tonic-gate } *mnttable;
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate /* Note that nothing is ever free()'d, so this is safe */
45*0Sstevel@tonic-gate #define mntstrdup(s) ((s) ? strdup((s)) : "")
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate #ifdef __STDC__
48*0Sstevel@tonic-gate static struct mntent *mygetmntent(FILE *, char *);
49*0Sstevel@tonic-gate static struct pmntent *addmtab(char *, struct pmntent *);
50*0Sstevel@tonic-gate static struct mntent *allocmntent(struct mntent *);
51*0Sstevel@tonic-gate #else /* !__STDC__ */
52*0Sstevel@tonic-gate static struct pmntent *addmtab();
53*0Sstevel@tonic-gate static struct mntent *mygetmntent();
54*0Sstevel@tonic-gate static struct mntent *allocmntent();
55*0Sstevel@tonic-gate static int idatesort();
56*0Sstevel@tonic-gate #endif
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate static struct mntent *
mygetmntent(f,name)59*0Sstevel@tonic-gate mygetmntent(f, name)
60*0Sstevel@tonic-gate FILE *f;
61*0Sstevel@tonic-gate char *name;
62*0Sstevel@tonic-gate {
63*0Sstevel@tonic-gate static struct mntent mt;
64*0Sstevel@tonic-gate int status;
65*0Sstevel@tonic-gate
66*0Sstevel@tonic-gate if ((status = getmntent(f, &mt)) == 0)
67*0Sstevel@tonic-gate return (&mt);
68*0Sstevel@tonic-gate
69*0Sstevel@tonic-gate switch (status) {
70*0Sstevel@tonic-gate case EOF: break; /* normal exit condition */
71*0Sstevel@tonic-gate case MNT_TOOLONG:
72*0Sstevel@tonic-gate msg(gettext("%s has a line that is too long\n"), name);
73*0Sstevel@tonic-gate break;
74*0Sstevel@tonic-gate case MNT_TOOMANY:
75*0Sstevel@tonic-gate msg(gettext("%s has a line with too many entries\n"), name);
76*0Sstevel@tonic-gate break;
77*0Sstevel@tonic-gate case MNT_TOOFEW:
78*0Sstevel@tonic-gate msg(gettext("%s has a line with too few entries\n"), name);
79*0Sstevel@tonic-gate break;
80*0Sstevel@tonic-gate default:
81*0Sstevel@tonic-gate msg(gettext(
82*0Sstevel@tonic-gate "Unknown return code, %d, from getmntent() on %s\n"),
83*0Sstevel@tonic-gate status, name);
84*0Sstevel@tonic-gate break;
85*0Sstevel@tonic-gate }
86*0Sstevel@tonic-gate
87*0Sstevel@tonic-gate return (NULL);
88*0Sstevel@tonic-gate }
89*0Sstevel@tonic-gate
90*0Sstevel@tonic-gate /*
91*0Sstevel@tonic-gate * Read in SVR4 vfstab-format table.
92*0Sstevel@tonic-gate */
93*0Sstevel@tonic-gate static struct pmntent *
addvfstab(tablename,pm)94*0Sstevel@tonic-gate addvfstab(tablename, pm)
95*0Sstevel@tonic-gate char *tablename;
96*0Sstevel@tonic-gate struct pmntent *pm;
97*0Sstevel@tonic-gate {
98*0Sstevel@tonic-gate struct mnttab *mnt;
99*0Sstevel@tonic-gate struct vfstab vfs;
100*0Sstevel@tonic-gate FILE *tp;
101*0Sstevel@tonic-gate int status;
102*0Sstevel@tonic-gate
103*0Sstevel@tonic-gate assert(((mnttable == NULL) && (pm == NULL)) || (pm != NULL));
104*0Sstevel@tonic-gate
105*0Sstevel@tonic-gate /*
106*0Sstevel@tonic-gate * No need to secure this, as tablename is hard-coded to VFSTAB,
107*0Sstevel@tonic-gate * and that file is in /etc. If random people have write-permission
108*0Sstevel@tonic-gate * there, then there are more problems than any degree of paranoia
109*0Sstevel@tonic-gate * on our part can fix.
110*0Sstevel@tonic-gate */
111*0Sstevel@tonic-gate tp = fopen(tablename, "r");
112*0Sstevel@tonic-gate if (tp == (FILE *)0) {
113*0Sstevel@tonic-gate msg(gettext("Cannot open %s for dump table information.\n"),
114*0Sstevel@tonic-gate tablename);
115*0Sstevel@tonic-gate return ((struct pmntent *)0);
116*0Sstevel@tonic-gate }
117*0Sstevel@tonic-gate while ((status = getvfsent(tp, &vfs)) == 0) {
118*0Sstevel@tonic-gate if (vfs.vfs_fstype == (char *)0 ||
119*0Sstevel@tonic-gate strcmp(vfs.vfs_fstype, MNTTYPE_42) != 0)
120*0Sstevel@tonic-gate continue;
121*0Sstevel@tonic-gate
122*0Sstevel@tonic-gate mnt = (struct mnttab *)xmalloc(sizeof (*mnt));
123*0Sstevel@tonic-gate mnt->mnt_fsname = mntstrdup(vfs.vfs_special);
124*0Sstevel@tonic-gate mnt->mnt_dir = mntstrdup(vfs.vfs_mountp);
125*0Sstevel@tonic-gate mnt->mnt_type = mntstrdup(vfs.vfs_fstype);
126*0Sstevel@tonic-gate mnt->mnt_opts = mntstrdup(vfs.vfs_mntopts);
127*0Sstevel@tonic-gate
128*0Sstevel@tonic-gate if (mnttable == (struct pmntent *)0)
129*0Sstevel@tonic-gate /*
130*0Sstevel@tonic-gate * Guaranteed by caller that pm will also be NULL,
131*0Sstevel@tonic-gate * so no memory leak to worry about.
132*0Sstevel@tonic-gate */
133*0Sstevel@tonic-gate mnttable = pm = (struct pmntent *)xmalloc(sizeof (*pm));
134*0Sstevel@tonic-gate else {
135*0Sstevel@tonic-gate /* Guaranteed pm not NULL by caller and local logic */
136*0Sstevel@tonic-gate pm->pm_next = (struct pmntent *)xmalloc(sizeof (*pm));
137*0Sstevel@tonic-gate pm = pm->pm_next;
138*0Sstevel@tonic-gate }
139*0Sstevel@tonic-gate pm->pm_mnt = mnt;
140*0Sstevel@tonic-gate pm->pm_next = (struct pmntent *)0;
141*0Sstevel@tonic-gate }
142*0Sstevel@tonic-gate
143*0Sstevel@tonic-gate switch (status) {
144*0Sstevel@tonic-gate case EOF: break; /* normal exit condition */
145*0Sstevel@tonic-gate case VFS_TOOLONG:
146*0Sstevel@tonic-gate msg(gettext("%s has a line that is too long\n"), tablename);
147*0Sstevel@tonic-gate break;
148*0Sstevel@tonic-gate case VFS_TOOMANY:
149*0Sstevel@tonic-gate msg(gettext("%s has a line with too many entries\n"),
150*0Sstevel@tonic-gate tablename);
151*0Sstevel@tonic-gate break;
152*0Sstevel@tonic-gate case VFS_TOOFEW:
153*0Sstevel@tonic-gate msg(gettext("%s has a line with too few entries\n"), tablename);
154*0Sstevel@tonic-gate break;
155*0Sstevel@tonic-gate default:
156*0Sstevel@tonic-gate msg(gettext(
157*0Sstevel@tonic-gate "Unknown return code, %d, from getvfsent() on %s\n"),
158*0Sstevel@tonic-gate status, tablename);
159*0Sstevel@tonic-gate break;
160*0Sstevel@tonic-gate }
161*0Sstevel@tonic-gate (void) fclose(tp);
162*0Sstevel@tonic-gate return (pm);
163*0Sstevel@tonic-gate }
164*0Sstevel@tonic-gate
165*0Sstevel@tonic-gate static struct mntent *
allocmntent(mnt)166*0Sstevel@tonic-gate allocmntent(mnt)
167*0Sstevel@tonic-gate struct mntent *mnt;
168*0Sstevel@tonic-gate {
169*0Sstevel@tonic-gate struct mntent *new;
170*0Sstevel@tonic-gate
171*0Sstevel@tonic-gate new = (struct mntent *)xmalloc(sizeof (*mnt));
172*0Sstevel@tonic-gate new->mnt_fsname = mntstrdup(mnt->mnt_fsname); /* mnt_special */
173*0Sstevel@tonic-gate new->mnt_dir = mntstrdup(mnt->mnt_dir); /* mnt_mountp */
174*0Sstevel@tonic-gate new->mnt_type = mntstrdup(mnt->mnt_type); /* mnt_fstype */
175*0Sstevel@tonic-gate new->mnt_opts = mntstrdup(mnt->mnt_opts); /* mnt_mntopts */
176*0Sstevel@tonic-gate return (new);
177*0Sstevel@tonic-gate }
178*0Sstevel@tonic-gate
179*0Sstevel@tonic-gate void
mnttabread()180*0Sstevel@tonic-gate mnttabread()
181*0Sstevel@tonic-gate {
182*0Sstevel@tonic-gate struct pmntent *pm = (struct pmntent *)0;
183*0Sstevel@tonic-gate
184*0Sstevel@tonic-gate if (mnttable != (struct pmntent *)0)
185*0Sstevel@tonic-gate return;
186*0Sstevel@tonic-gate /*
187*0Sstevel@tonic-gate * Read in the file system mount tables. Order
188*0Sstevel@tonic-gate * is important as the first matched entry is used
189*0Sstevel@tonic-gate * if the target device/filesystem is not mounted.
190*0Sstevel@tonic-gate * We try fstab or vfstab first, then mtab or mnttab.
191*0Sstevel@tonic-gate */
192*0Sstevel@tonic-gate pm = addvfstab(VFSTAB, pm);
193*0Sstevel@tonic-gate (void) addmtab(MOUNTED, pm);
194*0Sstevel@tonic-gate }
195*0Sstevel@tonic-gate
196*0Sstevel@tonic-gate static struct pmntent *
addmtab(tablename,pm)197*0Sstevel@tonic-gate addmtab(tablename, pm)
198*0Sstevel@tonic-gate char *tablename;
199*0Sstevel@tonic-gate struct pmntent *pm;
200*0Sstevel@tonic-gate {
201*0Sstevel@tonic-gate struct mntent *mnt;
202*0Sstevel@tonic-gate FILE *tp;
203*0Sstevel@tonic-gate
204*0Sstevel@tonic-gate tp = setmntent(tablename, "r");
205*0Sstevel@tonic-gate if (tp == (FILE *)0) {
206*0Sstevel@tonic-gate msg(gettext("Cannot open %s for dump table information.\n"),
207*0Sstevel@tonic-gate tablename);
208*0Sstevel@tonic-gate return ((struct pmntent *)0);
209*0Sstevel@tonic-gate }
210*0Sstevel@tonic-gate while (mnt = mygetmntent(tp, tablename)) {
211*0Sstevel@tonic-gate if (mnt->mnt_type == (char *)0 ||
212*0Sstevel@tonic-gate strcmp(mnt->mnt_type, MNTTYPE_42) != 0)
213*0Sstevel@tonic-gate continue;
214*0Sstevel@tonic-gate
215*0Sstevel@tonic-gate mnt = allocmntent(mnt);
216*0Sstevel@tonic-gate if (mnttable == (struct pmntent *)0)
217*0Sstevel@tonic-gate /*
218*0Sstevel@tonic-gate * Guaranteed by caller that pm will also be NULL,
219*0Sstevel@tonic-gate * so no memory leak to worry about.
220*0Sstevel@tonic-gate */
221*0Sstevel@tonic-gate mnttable = pm = (struct pmntent *)xmalloc(sizeof (*pm));
222*0Sstevel@tonic-gate else {
223*0Sstevel@tonic-gate /* Guaranteed pm not NULL by caller and local logic */
224*0Sstevel@tonic-gate pm->pm_next = (struct pmntent *)xmalloc(sizeof (*pm));
225*0Sstevel@tonic-gate pm = pm->pm_next;
226*0Sstevel@tonic-gate }
227*0Sstevel@tonic-gate pm->pm_mnt = mnt;
228*0Sstevel@tonic-gate pm->pm_next = (struct pmntent *)0;
229*0Sstevel@tonic-gate }
230*0Sstevel@tonic-gate (void) endmntent(tp);
231*0Sstevel@tonic-gate return (pm);
232*0Sstevel@tonic-gate }
233*0Sstevel@tonic-gate
234*0Sstevel@tonic-gate /*
235*0Sstevel@tonic-gate * Search in fstab and potentially mtab for a file name.
236*0Sstevel@tonic-gate * If "mounted" is non-zero, the target file system must
237*0Sstevel@tonic-gate * be mounted in order for the search to succeed.
238*0Sstevel@tonic-gate * This file name can be either the special or the path file name.
239*0Sstevel@tonic-gate *
240*0Sstevel@tonic-gate * The entries in either fstab or mtab are the BLOCK special names,
241*0Sstevel@tonic-gate * not the character special names.
242*0Sstevel@tonic-gate * The caller of mnttabsearch assures that the character device
243*0Sstevel@tonic-gate * is dumped (that is much faster)
244*0Sstevel@tonic-gate *
245*0Sstevel@tonic-gate * The file name can omit the leading '/'.
246*0Sstevel@tonic-gate */
247*0Sstevel@tonic-gate struct mntent *
mnttabsearch(key,mounted)248*0Sstevel@tonic-gate mnttabsearch(key, mounted)
249*0Sstevel@tonic-gate char *key;
250*0Sstevel@tonic-gate int mounted;
251*0Sstevel@tonic-gate {
252*0Sstevel@tonic-gate struct pmntent *pm;
253*0Sstevel@tonic-gate struct mntent *mnt;
254*0Sstevel@tonic-gate struct mntent *first = (struct mntent *)0;
255*0Sstevel@tonic-gate char *s;
256*0Sstevel@tonic-gate char *gotreal;
257*0Sstevel@tonic-gate char path[MAXPATHLEN];
258*0Sstevel@tonic-gate
259*0Sstevel@tonic-gate for (pm = mnttable; pm; pm = pm->pm_next) {
260*0Sstevel@tonic-gate s = NULL;
261*0Sstevel@tonic-gate mnt = pm->pm_mnt;
262*0Sstevel@tonic-gate if (strcmp(mnt->mnt_dir, key) == 0)
263*0Sstevel@tonic-gate goto found;
264*0Sstevel@tonic-gate if (strcmp(mnt->mnt_fsname, key) == 0)
265*0Sstevel@tonic-gate goto found;
266*0Sstevel@tonic-gate if ((s = rawname(mnt->mnt_fsname)) != NULL &&
267*0Sstevel@tonic-gate strcmp(s, key) == 0)
268*0Sstevel@tonic-gate goto found;
269*0Sstevel@tonic-gate
270*0Sstevel@tonic-gate gotreal = realpath(mnt->mnt_dir, path);
271*0Sstevel@tonic-gate if (gotreal && strcmp(path, key) == 0)
272*0Sstevel@tonic-gate goto found;
273*0Sstevel@tonic-gate if (key[0] != '/') {
274*0Sstevel@tonic-gate if (*mnt->mnt_fsname == '/' &&
275*0Sstevel@tonic-gate strcmp(mnt->mnt_fsname + 1, key) == 0)
276*0Sstevel@tonic-gate goto found;
277*0Sstevel@tonic-gate if (*mnt->mnt_dir == '/' &&
278*0Sstevel@tonic-gate strcmp(mnt->mnt_dir + 1, key) == 0)
279*0Sstevel@tonic-gate goto found;
280*0Sstevel@tonic-gate if (gotreal && *path == '/' &&
281*0Sstevel@tonic-gate strcmp(path + 1, key) == 0)
282*0Sstevel@tonic-gate goto found;
283*0Sstevel@tonic-gate }
284*0Sstevel@tonic-gate if (s != NULL && s != mnt->mnt_fsname)
285*0Sstevel@tonic-gate free(s);
286*0Sstevel@tonic-gate continue;
287*0Sstevel@tonic-gate found:
288*0Sstevel@tonic-gate /* Pointer comparison, not string comparison */
289*0Sstevel@tonic-gate if (s != NULL && s != mnt->mnt_fsname)
290*0Sstevel@tonic-gate free(s);
291*0Sstevel@tonic-gate /*
292*0Sstevel@tonic-gate * Found a match; return immediately if
293*0Sstevel@tonic-gate * it is mounted (valid), otherwise just
294*0Sstevel@tonic-gate * record if it's the first matched entry.
295*0Sstevel@tonic-gate */
296*0Sstevel@tonic-gate if (lf_ismounted(mnt->mnt_fsname, mnt->mnt_dir) > 0)
297*0Sstevel@tonic-gate return (mnt);
298*0Sstevel@tonic-gate else if (first == (struct mntent *)0)
299*0Sstevel@tonic-gate first = mnt;
300*0Sstevel@tonic-gate }
301*0Sstevel@tonic-gate /*
302*0Sstevel@tonic-gate * If we get here, there were either
303*0Sstevel@tonic-gate * no matches, or no matched entries
304*0Sstevel@tonic-gate * were mounted. Return failure if
305*0Sstevel@tonic-gate * we were supposed to find a mounted
306*0Sstevel@tonic-gate * entry, otherwise return the first
307*0Sstevel@tonic-gate * matched entry (or null).
308*0Sstevel@tonic-gate */
309*0Sstevel@tonic-gate if (mounted)
310*0Sstevel@tonic-gate return ((struct mntent *)0);
311*0Sstevel@tonic-gate return (first);
312*0Sstevel@tonic-gate }
313*0Sstevel@tonic-gate
314*0Sstevel@tonic-gate static struct pmntent *current;
315*0Sstevel@tonic-gate static int set;
316*0Sstevel@tonic-gate
317*0Sstevel@tonic-gate void
318*0Sstevel@tonic-gate #ifdef __STDC__
setmnttab(void)319*0Sstevel@tonic-gate setmnttab(void)
320*0Sstevel@tonic-gate #else
321*0Sstevel@tonic-gate setmnttab()
322*0Sstevel@tonic-gate #endif
323*0Sstevel@tonic-gate {
324*0Sstevel@tonic-gate current = mnttable;
325*0Sstevel@tonic-gate set = 1;
326*0Sstevel@tonic-gate }
327*0Sstevel@tonic-gate
328*0Sstevel@tonic-gate struct mntent *
329*0Sstevel@tonic-gate #ifdef __STDC__
getmnttab(void)330*0Sstevel@tonic-gate getmnttab(void)
331*0Sstevel@tonic-gate #else
332*0Sstevel@tonic-gate getmnttab()
333*0Sstevel@tonic-gate #endif
334*0Sstevel@tonic-gate {
335*0Sstevel@tonic-gate struct pmntent *pm;
336*0Sstevel@tonic-gate
337*0Sstevel@tonic-gate if (!set)
338*0Sstevel@tonic-gate setmnttab();
339*0Sstevel@tonic-gate pm = current;
340*0Sstevel@tonic-gate if (current) {
341*0Sstevel@tonic-gate current = current->pm_next;
342*0Sstevel@tonic-gate return (pm->pm_mnt);
343*0Sstevel@tonic-gate }
344*0Sstevel@tonic-gate return ((struct mntent *)0);
345*0Sstevel@tonic-gate }
346