1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright (c) 2000 by Sun Microsystems, Inc.
24*7c478bd9Sstevel@tonic-gate * All rights reserved.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
28*7c478bd9Sstevel@tonic-gate #include <sys/statvfs.h>
29*7c478bd9Sstevel@tonic-gate #include <sys/param.h>
30*7c478bd9Sstevel@tonic-gate #include <sys/stat.h>
31*7c478bd9Sstevel@tonic-gate
32*7c478bd9Sstevel@tonic-gate #include <unistd.h>
33*7c478bd9Sstevel@tonic-gate #include <string.h>
34*7c478bd9Sstevel@tonic-gate #include <stdio.h>
35*7c478bd9Sstevel@tonic-gate #include <fcntl.h>
36*7c478bd9Sstevel@tonic-gate
37*7c478bd9Sstevel@tonic-gate #include "utils.h"
38*7c478bd9Sstevel@tonic-gate
39*7c478bd9Sstevel@tonic-gate static FILE *
minfree_open(const char * dir,int oflags,const char * fmode)40*7c478bd9Sstevel@tonic-gate minfree_open(const char *dir, int oflags, const char *fmode)
41*7c478bd9Sstevel@tonic-gate {
42*7c478bd9Sstevel@tonic-gate char path[MAXPATHLEN];
43*7c478bd9Sstevel@tonic-gate int fd;
44*7c478bd9Sstevel@tonic-gate
45*7c478bd9Sstevel@tonic-gate (void) snprintf(path, sizeof (path), "%s/minfree", dir);
46*7c478bd9Sstevel@tonic-gate
47*7c478bd9Sstevel@tonic-gate if ((fd = open(path, oflags, S_IRUSR | S_IWUSR)) >= 0)
48*7c478bd9Sstevel@tonic-gate return (fdopen(fd, fmode));
49*7c478bd9Sstevel@tonic-gate
50*7c478bd9Sstevel@tonic-gate return (NULL);
51*7c478bd9Sstevel@tonic-gate }
52*7c478bd9Sstevel@tonic-gate
53*7c478bd9Sstevel@tonic-gate int
minfree_read(const char * dir,unsigned long long * ullp)54*7c478bd9Sstevel@tonic-gate minfree_read(const char *dir, unsigned long long *ullp)
55*7c478bd9Sstevel@tonic-gate {
56*7c478bd9Sstevel@tonic-gate FILE *fp = minfree_open(dir, O_RDONLY, "r");
57*7c478bd9Sstevel@tonic-gate
58*7c478bd9Sstevel@tonic-gate if (fp != NULL) {
59*7c478bd9Sstevel@tonic-gate char buf[BUFSIZ];
60*7c478bd9Sstevel@tonic-gate int status = -1;
61*7c478bd9Sstevel@tonic-gate
62*7c478bd9Sstevel@tonic-gate if (fgets(buf, BUFSIZ, fp) != NULL) {
63*7c478bd9Sstevel@tonic-gate if (valid_str2ull(buf, ullp))
64*7c478bd9Sstevel@tonic-gate status = 0;
65*7c478bd9Sstevel@tonic-gate else
66*7c478bd9Sstevel@tonic-gate warn(gettext("\"%s/minfree\": invalid minfree "
67*7c478bd9Sstevel@tonic-gate "value -- %s\n"), dir, buf);
68*7c478bd9Sstevel@tonic-gate }
69*7c478bd9Sstevel@tonic-gate
70*7c478bd9Sstevel@tonic-gate (void) fclose(fp);
71*7c478bd9Sstevel@tonic-gate return (status);
72*7c478bd9Sstevel@tonic-gate }
73*7c478bd9Sstevel@tonic-gate
74*7c478bd9Sstevel@tonic-gate return (-1);
75*7c478bd9Sstevel@tonic-gate }
76*7c478bd9Sstevel@tonic-gate
77*7c478bd9Sstevel@tonic-gate int
minfree_write(const char * dir,unsigned long long ull)78*7c478bd9Sstevel@tonic-gate minfree_write(const char *dir, unsigned long long ull)
79*7c478bd9Sstevel@tonic-gate {
80*7c478bd9Sstevel@tonic-gate FILE *fp = minfree_open(dir, O_WRONLY | O_CREAT | O_TRUNC, "w");
81*7c478bd9Sstevel@tonic-gate
82*7c478bd9Sstevel@tonic-gate if (fp != NULL) {
83*7c478bd9Sstevel@tonic-gate int status = fprintf(fp, "%llu\n", ull);
84*7c478bd9Sstevel@tonic-gate (void) fclose(fp);
85*7c478bd9Sstevel@tonic-gate return (status);
86*7c478bd9Sstevel@tonic-gate }
87*7c478bd9Sstevel@tonic-gate
88*7c478bd9Sstevel@tonic-gate return (-1);
89*7c478bd9Sstevel@tonic-gate }
90*7c478bd9Sstevel@tonic-gate
91*7c478bd9Sstevel@tonic-gate int
minfree_compute(const char * dir,char * s,unsigned long long * ullp)92*7c478bd9Sstevel@tonic-gate minfree_compute(const char *dir, char *s, unsigned long long *ullp)
93*7c478bd9Sstevel@tonic-gate {
94*7c478bd9Sstevel@tonic-gate size_t len = strlen(s);
95*7c478bd9Sstevel@tonic-gate unsigned long long m = 1;
96*7c478bd9Sstevel@tonic-gate
97*7c478bd9Sstevel@tonic-gate struct statvfs64 fsb;
98*7c478bd9Sstevel@tonic-gate int pct;
99*7c478bd9Sstevel@tonic-gate
100*7c478bd9Sstevel@tonic-gate switch (s[len - 1]) {
101*7c478bd9Sstevel@tonic-gate case '%':
102*7c478bd9Sstevel@tonic-gate s[len - 1] = '\0';
103*7c478bd9Sstevel@tonic-gate
104*7c478bd9Sstevel@tonic-gate if (!valid_str2int(s, &pct) || pct > 100) {
105*7c478bd9Sstevel@tonic-gate warn(gettext("invalid minfree %% -- %s\n"), s);
106*7c478bd9Sstevel@tonic-gate return (-1);
107*7c478bd9Sstevel@tonic-gate }
108*7c478bd9Sstevel@tonic-gate
109*7c478bd9Sstevel@tonic-gate if (statvfs64(dir, &fsb) == -1) {
110*7c478bd9Sstevel@tonic-gate warn(gettext("failed to statvfs %s"), dir);
111*7c478bd9Sstevel@tonic-gate return (-1);
112*7c478bd9Sstevel@tonic-gate }
113*7c478bd9Sstevel@tonic-gate
114*7c478bd9Sstevel@tonic-gate *ullp = fsb.f_blocks * fsb.f_frsize *
115*7c478bd9Sstevel@tonic-gate (u_longlong_t)pct / 100ULL / 1024ULL;
116*7c478bd9Sstevel@tonic-gate
117*7c478bd9Sstevel@tonic-gate return (0);
118*7c478bd9Sstevel@tonic-gate
119*7c478bd9Sstevel@tonic-gate case 'm':
120*7c478bd9Sstevel@tonic-gate case 'M':
121*7c478bd9Sstevel@tonic-gate m = 1024ULL;
122*7c478bd9Sstevel@tonic-gate /*FALLTHRU*/
123*7c478bd9Sstevel@tonic-gate
124*7c478bd9Sstevel@tonic-gate case 'k':
125*7c478bd9Sstevel@tonic-gate case 'K':
126*7c478bd9Sstevel@tonic-gate s[len - 1] = '\0';
127*7c478bd9Sstevel@tonic-gate
128*7c478bd9Sstevel@tonic-gate if (valid_str2ull(s, ullp)) {
129*7c478bd9Sstevel@tonic-gate *ullp *= m;
130*7c478bd9Sstevel@tonic-gate return (0);
131*7c478bd9Sstevel@tonic-gate }
132*7c478bd9Sstevel@tonic-gate
133*7c478bd9Sstevel@tonic-gate warn(gettext("invalid minfree value -- %s\n"), s);
134*7c478bd9Sstevel@tonic-gate return (-1);
135*7c478bd9Sstevel@tonic-gate
136*7c478bd9Sstevel@tonic-gate default:
137*7c478bd9Sstevel@tonic-gate warn(gettext("expected m, k, or %% unit after "
138*7c478bd9Sstevel@tonic-gate "minfree -- %s\n"), s);
139*7c478bd9Sstevel@tonic-gate return (-1);
140*7c478bd9Sstevel@tonic-gate }
141*7c478bd9Sstevel@tonic-gate }
142