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 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
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 <stdlib.h>
30*0Sstevel@tonic-gate #include <sys/types.h>
31*0Sstevel@tonic-gate #include <stdio.h>
32*0Sstevel@tonic-gate #include <sys/mnttab.h>
33*0Sstevel@tonic-gate #include <sys/mntent.h>
34*0Sstevel@tonic-gate #include <sys/stat.h>
35*0Sstevel@tonic-gate #include <sys/time.h>
36*0Sstevel@tonic-gate #include <string.h>
37*0Sstevel@tonic-gate #include <fcntl.h>
38*0Sstevel@tonic-gate
39*0Sstevel@tonic-gate #include "statcommon.h"
40*0Sstevel@tonic-gate #include "dsr.h"
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate static time_t mtime;
43*0Sstevel@tonic-gate mnt_t *nfs;
44*0Sstevel@tonic-gate static mnt_t *ufs;
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate static void build_mnt_list(FILE *);
47*0Sstevel@tonic-gate
48*0Sstevel@tonic-gate mnt_t *
lookup_mntent_byname(char * nm)49*0Sstevel@tonic-gate lookup_mntent_byname(char *nm)
50*0Sstevel@tonic-gate {
51*0Sstevel@tonic-gate mnt_t *rv = 0;
52*0Sstevel@tonic-gate mnt_t *minfo;
53*0Sstevel@tonic-gate uint_t did_nfs;
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate if (nm) {
57*0Sstevel@tonic-gate minfo = ufs;
58*0Sstevel@tonic-gate did_nfs = 0;
59*0Sstevel@tonic-gate while (minfo) {
60*0Sstevel@tonic-gate if (strcmp(nm, minfo->device_name)) {
61*0Sstevel@tonic-gate if (minfo->next != 0)
62*0Sstevel@tonic-gate minfo = minfo->next;
63*0Sstevel@tonic-gate else if (did_nfs == 0) {
64*0Sstevel@tonic-gate minfo = nfs;
65*0Sstevel@tonic-gate did_nfs = 1;
66*0Sstevel@tonic-gate }
67*0Sstevel@tonic-gate else
68*0Sstevel@tonic-gate minfo = 0;
69*0Sstevel@tonic-gate } else {
70*0Sstevel@tonic-gate rv = minfo;
71*0Sstevel@tonic-gate break;
72*0Sstevel@tonic-gate }
73*0Sstevel@tonic-gate }
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate return (rv);
76*0Sstevel@tonic-gate }
77*0Sstevel@tonic-gate
78*0Sstevel@tonic-gate void
do_mnttab(void)79*0Sstevel@tonic-gate do_mnttab(void)
80*0Sstevel@tonic-gate {
81*0Sstevel@tonic-gate struct stat buf;
82*0Sstevel@tonic-gate FILE *mpt;
83*0Sstevel@tonic-gate struct flock lb;
84*0Sstevel@tonic-gate
85*0Sstevel@tonic-gate if (stat(MNTTAB, &buf) == 0) {
86*0Sstevel@tonic-gate if (buf.st_mtime != mtime) {
87*0Sstevel@tonic-gate /*
88*0Sstevel@tonic-gate * File has changed. Get the new file.
89*0Sstevel@tonic-gate */
90*0Sstevel@tonic-gate if ((mpt = fopen(MNTTAB, "r"))) {
91*0Sstevel@tonic-gate lb.l_type = F_RDLCK;
92*0Sstevel@tonic-gate lb.l_whence = 0;
93*0Sstevel@tonic-gate lb.l_start = 0;
94*0Sstevel@tonic-gate lb.l_len = 0;
95*0Sstevel@tonic-gate (void) fcntl(fileno(mpt), F_SETLKW, &lb);
96*0Sstevel@tonic-gate build_mnt_list(mpt);
97*0Sstevel@tonic-gate mtime = buf.st_mtime;
98*0Sstevel@tonic-gate /*
99*0Sstevel@tonic-gate * Lock goes away when we close the file.
100*0Sstevel@tonic-gate */
101*0Sstevel@tonic-gate (void) fclose(mpt);
102*0Sstevel@tonic-gate }
103*0Sstevel@tonic-gate }
104*0Sstevel@tonic-gate }
105*0Sstevel@tonic-gate }
106*0Sstevel@tonic-gate
107*0Sstevel@tonic-gate static void
build_mnt_list(FILE * mpt)108*0Sstevel@tonic-gate build_mnt_list(FILE *mpt)
109*0Sstevel@tonic-gate {
110*0Sstevel@tonic-gate mnt_t *item;
111*0Sstevel@tonic-gate mnt_t **which;
112*0Sstevel@tonic-gate mnt_t *tmp;
113*0Sstevel@tonic-gate int found;
114*0Sstevel@tonic-gate struct extmnttab mnt;
115*0Sstevel@tonic-gate
116*0Sstevel@tonic-gate if (mpt) {
117*0Sstevel@tonic-gate while (nfs) {
118*0Sstevel@tonic-gate free(nfs->device_name);
119*0Sstevel@tonic-gate free(nfs->mount_point);
120*0Sstevel@tonic-gate free(nfs->devinfo);
121*0Sstevel@tonic-gate tmp = nfs;
122*0Sstevel@tonic-gate nfs = nfs->next;
123*0Sstevel@tonic-gate free(tmp);
124*0Sstevel@tonic-gate }
125*0Sstevel@tonic-gate while (ufs) {
126*0Sstevel@tonic-gate free(ufs->device_name);
127*0Sstevel@tonic-gate free(ufs->mount_point);
128*0Sstevel@tonic-gate free(ufs->devinfo);
129*0Sstevel@tonic-gate tmp = ufs;
130*0Sstevel@tonic-gate ufs = ufs->next;
131*0Sstevel@tonic-gate free(tmp);
132*0Sstevel@tonic-gate }
133*0Sstevel@tonic-gate (void) memset(&mnt, 0, sizeof (struct extmnttab));
134*0Sstevel@tonic-gate
135*0Sstevel@tonic-gate resetmnttab(mpt);
136*0Sstevel@tonic-gate while ((found = getextmntent(mpt, &mnt,
137*0Sstevel@tonic-gate sizeof (struct extmnttab))) != -1) {
138*0Sstevel@tonic-gate if (found == 0) {
139*0Sstevel@tonic-gate if (strcmp(mnt.mnt_fstype, MNTTYPE_UFS) == 0)
140*0Sstevel@tonic-gate which = &ufs;
141*0Sstevel@tonic-gate else if (strcmp(mnt.mnt_fstype,
142*0Sstevel@tonic-gate MNTTYPE_NFS) == 0)
143*0Sstevel@tonic-gate which = &nfs;
144*0Sstevel@tonic-gate else
145*0Sstevel@tonic-gate which = 0;
146*0Sstevel@tonic-gate if (which) {
147*0Sstevel@tonic-gate item = safe_alloc(sizeof (mnt_t));
148*0Sstevel@tonic-gate item->device_name =
149*0Sstevel@tonic-gate safe_strdup(mnt.mnt_special);
150*0Sstevel@tonic-gate item->mount_point =
151*0Sstevel@tonic-gate safe_strdup(mnt.mnt_mountp);
152*0Sstevel@tonic-gate item->devinfo =
153*0Sstevel@tonic-gate safe_strdup(mnt.mnt_mntopts);
154*0Sstevel@tonic-gate item->minor = mnt.mnt_minor;
155*0Sstevel@tonic-gate item->next = *which;
156*0Sstevel@tonic-gate *which = item;
157*0Sstevel@tonic-gate }
158*0Sstevel@tonic-gate }
159*0Sstevel@tonic-gate }
160*0Sstevel@tonic-gate }
161*0Sstevel@tonic-gate }
162