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/*
* Copyright (C) 2014-2021 Firejail Authors
*
* This file is part of firejail project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "firejail.h"
#include <sys/time.h>
#include <sys/resource.h>
void set_rlimits(void) {
EUID_ASSERT();
// resource limits
struct rlimit rl;
if (arg_rlimit_cpu) {
if (getrlimit(RLIMIT_CPU, &rl) == -1)
errExit("getrlimit");
if (cfg.rlimit_cpu > rl.rlim_max && getuid() != 0)
cfg.rlimit_cpu = rl.rlim_max;
// set the new limit
rl.rlim_cur = (rlim_t) cfg.rlimit_cpu;
rl.rlim_max = (rlim_t) cfg.rlimit_cpu;
#ifdef HAVE_GCOV
__gcov_dump();
#endif
if (setrlimit(RLIMIT_CPU, &rl) == -1)
errExit("setrlimit");
if (arg_debug)
printf("Config rlimit: max cpu time %llu\n", cfg.rlimit_cpu);
}
if (arg_rlimit_nofile) {
if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
errExit("getrlimit");
if (cfg.rlimit_nofile > rl.rlim_max && getuid() != 0)
cfg.rlimit_nofile = rl.rlim_max;
// set the new limit
rl.rlim_cur = (rlim_t) cfg.rlimit_nofile;
rl.rlim_max = (rlim_t) cfg.rlimit_nofile;
#ifdef HAVE_GCOV // gcov-instrumented programs might crash at this point
__gcov_dump();
#endif
if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
errExit("setrlimit");
if (arg_debug)
printf("Config rlimit: number of open file descriptors %llu\n", cfg.rlimit_nofile);
}
if (arg_rlimit_nproc) {
if (getrlimit(RLIMIT_NPROC, &rl) == -1)
errExit("getrlimit");
if (cfg.rlimit_nproc > rl.rlim_max && getuid() != 0)
cfg.rlimit_nproc = rl.rlim_max;
// set the new limit
rl.rlim_cur = (rlim_t) cfg.rlimit_nproc;
rl.rlim_max = (rlim_t) cfg.rlimit_nproc;
#ifdef HAVE_GCOV
__gcov_dump();
#endif
if (setrlimit(RLIMIT_NPROC, &rl) == -1)
errExit("setrlimit");
if (arg_debug)
printf("Config rlimit: number of processes %llu\n", cfg.rlimit_nproc);
}
if (arg_rlimit_fsize) {
if (getrlimit(RLIMIT_FSIZE, &rl) == -1)
errExit("getrlimit");
if (cfg.rlimit_fsize > rl.rlim_max && getuid() != 0)
cfg.rlimit_fsize = rl.rlim_max;
// set the new limit
rl.rlim_cur = (rlim_t) cfg.rlimit_fsize;
rl.rlim_max = (rlim_t) cfg.rlimit_fsize;
#ifdef HAVE_GCOV
__gcov_dump();
#endif
if (setrlimit(RLIMIT_FSIZE, &rl) == -1)
errExit("setrlimit");
if (arg_debug)
printf("Config rlimit: maximum file size %llu\n", cfg.rlimit_fsize);
}
if (arg_rlimit_sigpending) {
if (getrlimit(RLIMIT_SIGPENDING, &rl) == -1)
errExit("getrlimit");
if (cfg.rlimit_sigpending > rl.rlim_max && getuid() != 0)
cfg.rlimit_sigpending = rl.rlim_max;
// set the new limit
rl.rlim_cur = (rlim_t) cfg.rlimit_sigpending;
rl.rlim_max = (rlim_t) cfg.rlimit_sigpending;
#ifdef HAVE_GCOV
__gcov_dump();
#endif
if (setrlimit(RLIMIT_SIGPENDING, &rl) == -1)
errExit("setrlimit");
if (arg_debug)
printf("Config rlimit: maximum number of signals pending %llu\n", cfg.rlimit_sigpending);
}
if (arg_rlimit_as) {
if (getrlimit(RLIMIT_AS, &rl) == -1)
errExit("getrlimit");
if (cfg.rlimit_as > rl.rlim_max && getuid() != 0)
cfg.rlimit_as = rl.rlim_max;
// set the new limit
rl.rlim_cur = (rlim_t) cfg.rlimit_as;
rl.rlim_max = (rlim_t) cfg.rlimit_as;
#ifdef HAVE_GCOV
__gcov_dump();
#endif
if (setrlimit(RLIMIT_AS, &rl) == -1)
errExit("setrlimit");
if (arg_debug)
printf("Config rlimit: maximum virtual memory %llu\n", cfg.rlimit_as);
}
}
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