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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/statvfs.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include "utils.h"
static FILE *
minfree_open(const char *dir, int oflags, const char *fmode)
{
char path[MAXPATHLEN];
int fd;
(void) snprintf(path, sizeof (path), "%s/minfree", dir);
if ((fd = open(path, oflags, S_IRUSR | S_IWUSR)) >= 0)
return (fdopen(fd, fmode));
return (NULL);
}
int
minfree_read(const char *dir, unsigned long long *ullp)
{
FILE *fp = minfree_open(dir, O_RDONLY, "r");
if (fp != NULL) {
char buf[BUFSIZ];
int status = -1;
if (fgets(buf, BUFSIZ, fp) != NULL) {
if (valid_str2ull(buf, ullp))
status = 0;
else
warn(gettext("\"%s/minfree\": invalid minfree "
"value -- %s\n"), dir, buf);
}
(void) fclose(fp);
return (status);
}
return (-1);
}
int
minfree_write(const char *dir, unsigned long long ull)
{
FILE *fp = minfree_open(dir, O_WRONLY | O_CREAT | O_TRUNC, "w");
if (fp != NULL) {
int status = fprintf(fp, "%llu\n", ull);
(void) fclose(fp);
return (status);
}
return (-1);
}
int
minfree_compute(const char *dir, char *s, unsigned long long *ullp)
{
size_t len = strlen(s);
unsigned long long m = 1;
struct statvfs64 fsb;
int pct;
switch (s[len - 1]) {
case '%':
s[len - 1] = '\0';
if (!valid_str2int(s, &pct) || pct > 100) {
warn(gettext("invalid minfree %% -- %s\n"), s);
return (-1);
}
if (statvfs64(dir, &fsb) == -1) {
warn(gettext("failed to statvfs %s"), dir);
return (-1);
}
*ullp = fsb.f_blocks * fsb.f_frsize *
(u_longlong_t)pct / 100ULL / 1024ULL;
return (0);
case 'm':
case 'M':
m = 1024ULL;
/*FALLTHRU*/
case 'k':
case 'K':
s[len - 1] = '\0';
if (valid_str2ull(s, ullp)) {
*ullp *= m;
return (0);
}
warn(gettext("invalid minfree value -- %s\n"), s);
return (-1);
default:
warn(gettext("expected m, k, or %% unit after "
"minfree -- %s\n"), s);
return (-1);
}
}
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