2 * Copyright (c) 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "login_locl.h"
40 #ifdef HAVE_SYS_RESOURCE_H
41 #include <sys/resource.h>
51 #define LIM(X, S) { #X, RLIMIT_##X, S, 0 }
82 find_limit(const char *name)
85 for(l = limits; l->name != NULL; l++)
86 if(strcasecmp(name, l->name) == 0)
91 /* this function reads limits.conf files similar to pam_limits
92 unimplemented features include:
95 priorities etc that are not set via setrlimit
96 XXX uses static storage, and clobbers getgr*
100 read_limits_conf(const char *file, const struct passwd *pwd)
109 f = fopen(file, "r");
111 if(errno != ENOENT && errno != ENOTDIR)
112 syslog(LOG_ERR, "%s: %m", file);
116 while(fgets(buf, sizeof(buf), f) != NULL) {
124 syslog(LOG_ERR, "%s: line %d: NUL character", file, lineno);
127 if(buf[strlen(buf) - 1] != '\n') {
128 /* file did not end with a newline, figure out if we're at
129 the EOF, or if our buffer was too small */
132 while((c = fgetc(f)) != EOF) {
138 syslog(LOG_ERR, "%s: line %d: line too long", file, lineno);
142 buf[strcspn(buf, "#\r\n")] = '\0';
143 if((args[0] = strtok_r(buf, " \t", &last)) == NULL ||
144 (args[1] = strtok_r(NULL, " \t", &last)) == NULL ||
145 (args[2] = strtok_r(NULL, " \t", &last)) == NULL ||
146 (args[3] = strtok_r(NULL, " \t", &last)) == NULL) {
147 if(args[0] != NULL) /* this would include comment lines */
148 syslog(LOG_ERR, "%s: line %d: malformed line", file, lineno);
152 l = find_limit(args[2]);
154 syslog(LOG_ERR, "%s: line %d: unknown limit %s", file, lineno, args[2]);
157 if(strcmp(args[3], "-") == 0) {
158 value = RLIM_INFINITY;
161 value = strtol(args[3], &end, 10);
163 syslog(LOG_ERR, "%s: line %d: bad value %s", file, lineno, args[3]);
166 if((value == LONG_MIN || value == LONG_MAX) && errno == ERANGE) {
167 syslog(LOG_ERR, "%s: line %d: bad value %s", file, lineno, args[3]);
170 if(value * l->scale < value)
171 value = RLIM_INFINITY;
176 /* XXX unclear: if you set group hard and user soft limit,
177 should the hard limit still apply? this code doesn't. */
178 if(strcmp(args[0], pwd->pw_name) == 0)
180 if(*args[0] == '@') {
182 gr = getgrnam(args[0] + 1);
183 if(gr != NULL && gr->gr_gid == pwd->pw_gid)
186 if(strcmp(args[0], "*") == 0)
188 if(level == 0 || level < l->has_limit) /* not for us */
190 if(l->has_limit < level) {
191 if(getrlimit(l->resource, &l->limit) < 0)
193 l->has_limit = level;
196 /* XXX unclear: if you soft to more than default hard, should
197 we set hard to soft? this code doesn't. */
198 if(strcasecmp(args[1], "soft") == 0 || strcmp(args[1], "-") == 0)
199 l->limit.rlim_cur = value;
200 if(strcasecmp(args[1], "hard") == 0 || strcmp(args[1], "-") == 0)
201 l->limit.rlim_max = value;
204 for(l = limits; l->name != NULL; l++) {
206 if(l->limit.rlim_cur > l->limit.rlim_max)
207 l->limit.rlim_cur = l->limit.rlim_max;
208 if(setrlimit(l->resource, &l->limit) != 0)
209 syslog(LOG_ERR, "setrlimit RLIM_%s failed: %m", l->name);