/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
#include <alloca.h>
#include <errno.h>
#include "parse-util.h"
#include "path-util.h"
#include "process-util.h"
+#include "procfs-util.h"
#include "set.h"
#include "signal-util.h"
#include "stat-util.h"
const void *p;
int comparison;
+ assert(!size_multiply_overflow(nmemb, size));
+
l = 0;
u = nmemb;
while (l < u) {
idx = (l + u) / 2;
- p = (const char *) base + idx * size;
+ p = (const uint8_t*) base + idx * size;
comparison = compar(key, p, arg);
if (comparison < 0)
u = idx;
return -EINVAL;
p = strjoina("/run/systemd/machines/", machine);
- r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
+ r = parse_env_file(NULL, p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
if (r == -ENOENT)
return -EHOSTDOWN;
if (r < 0)
uint64_t mem, lim;
size_t ps;
long sc;
+ int r;
/* We return this as uint64_t in case we are running as 32bit process on a 64bit kernel with huge amounts of
* memory.
ps = page_size();
mem = (uint64_t) sc * (uint64_t) ps;
- if (cg_get_root_path(&root) < 0)
+ r = cg_get_root_path(&root);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to determine root cgroup, ignoring cgroup memory limit: %m");
return mem;
+ }
- if (cg_get_attribute("memory", root, "memory.limit_in_bytes", &value))
+ r = cg_all_unified();
+ if (r < 0) {
+ log_debug_errno(r, "Failed to determine root unified mode, ignoring cgroup memory limit: %m");
return mem;
+ }
+ if (r > 0) {
+ r = cg_get_attribute("memory", root, "memory.max", &value);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to read memory.max cgroup attribute, ignoring cgroup memory limit: %m");
+ return mem;
+ }
+
+ if (streq(value, "max"))
+ return mem;
+ } else {
+ r = cg_get_attribute("memory", root, "memory.limit_in_bytes", &value);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to read memory.limit_in_bytes cgroup attribute, ignoring cgroup memory limit: %m");
+ return mem;
+ }
+ }
- if (safe_atou64(value, &lim) < 0)
+ r = safe_atou64(value, &lim);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to parse cgroup memory limit '%s', ignoring: %m", value);
+ return mem;
+ }
+ if (lim == UINT64_MAX)
return mem;
/* Make sure the limit is a multiple of our own page size */
uint64_t system_tasks_max(void) {
-#if SIZEOF_PID_T == 4
-#define TASKS_MAX ((uint64_t) (INT32_MAX-1))
-#elif SIZEOF_PID_T == 2
-#define TASKS_MAX ((uint64_t) (INT16_MAX-1))
-#else
-#error "Unknown pid_t size"
-#endif
-
- _cleanup_free_ char *value = NULL, *root = NULL;
uint64_t a = TASKS_MAX, b = TASKS_MAX;
+ _cleanup_free_ char *root = NULL;
+ int r;
/* Determine the maximum number of tasks that may run on this system. We check three sources to determine this
* limit:
*
- * a) the maximum value for the pid_t type
+ * a) the maximum tasks value the kernel allows on this architecture
* b) the cgroups pids_max attribute for the system
- * c) the kernel's configure maximum PID value
+ * c) the kernel's configured maximum PID value
*
* And then pick the smallest of the three */
- if (read_one_line_file("/proc/sys/kernel/pid_max", &value) >= 0)
- (void) safe_atou64(value, &a);
+ r = procfs_tasks_get_limit(&a);
+ if (r < 0)
+ log_debug_errno(r, "Failed to read maximum number of tasks from /proc, ignoring: %m");
- if (cg_get_root_path(&root) >= 0) {
- value = mfree(value);
+ r = cg_get_root_path(&root);
+ if (r < 0)
+ log_debug_errno(r, "Failed to determine cgroup root path, ignoring: %m");
+ else {
+ _cleanup_free_ char *value = NULL;
- if (cg_get_attribute("pids", root, "pids.max", &value) >= 0)
- (void) safe_atou64(value, &b);
+ r = cg_get_attribute("pids", root, "pids.max", &value);
+ if (r < 0)
+ log_debug_errno(r, "Failed to read pids.max attribute of cgroup root, ignoring: %m");
+ else if (!streq(value, "max")) {
+ r = safe_atou64(value, &b);
+ if (r < 0)
+ log_debug_errno(r, "Failed to parse pids.max attribute of cgroup root, ignoring: %m");
+ }
}
return MIN3(TASKS_MAX,
return m / max;
}
-int update_reboot_parameter_and_warn(const char *param) {
- int r;
-
- if (isempty(param)) {
- if (unlink("/run/systemd/reboot-param") < 0) {
- if (errno == ENOENT)
- return 0;
-
- return log_warning_errno(errno, "Failed to unlink reboot parameter file: %m");
- }
-
- return 0;
- }
-
- RUN_WITH_UMASK(0022) {
- r = write_string_file("/run/systemd/reboot-param", param, WRITE_STRING_FILE_CREATE);
- if (r < 0)
- return log_warning_errno(r, "Failed to write reboot parameter file: %m");
- }
-
- return 0;
-}
-
int version(void) {
puts(PACKAGE_STRING "\n"
SYSTEMD_FEATURES);
}
/* Turn off core dumps but only if we're running outside of a container. */
-void disable_core_dumps(void) {
- if (detect_container() <= 0)
- (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0);
+void disable_coredumps(void) {
+ int r;
+
+ if (detect_container() > 0)
+ return;
+
+ r = write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0);
+ if (r < 0)
+ log_debug_errno(r, "Failed to turn off coredumps, ignoring: %m");
}
projects / thirdparty / systemd.git / blobdiff