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 "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"
#include "umask-util.h"
#include "user-util.h"
#include "util.h"
+#include "virt.h"
int saved_argc = 0;
char **saved_argv = NULL;
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;
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;
/* 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);
+ (void) procfs_tasks_get_limit(&a);
if (cg_get_root_path(&root) >= 0) {
- value = mfree(value);
+ _cleanup_free_ char *value = NULL;
if (cg_get_attribute("pids", root, "pids.max", &value) >= 0)
(void) safe_atou64(value, &b);
return m / max;
}
-int update_reboot_parameter_and_warn(const char *param) {
- int r;
+int version(void) {
+ puts(PACKAGE_STRING "\n"
+ SYSTEMD_FEATURES);
+ return 0;
+}
- if (isempty(param)) {
- if (unlink("/run/systemd/reboot-param") < 0) {
- if (errno == ENOENT)
- return 0;
+/* This is a direct translation of str_verscmp from boot.c */
+static bool is_digit(int c) {
+ return c >= '0' && c <= '9';
+}
+
+static int c_order(int c) {
+ if (c == 0 || is_digit(c))
+ return 0;
+
+ if ((c >= 'a') && (c <= 'z'))
+ return c;
+
+ return c + 0x10000;
+}
+
+int str_verscmp(const char *s1, const char *s2) {
+ const char *os1, *os2;
- return log_warning_errno(errno, "Failed to unlink reboot parameter file: %m");
+ assert(s1);
+ assert(s2);
+
+ os1 = s1;
+ os2 = s2;
+
+ while (*s1 || *s2) {
+ int first;
+
+ while ((*s1 && !is_digit(*s1)) || (*s2 && !is_digit(*s2))) {
+ int order;
+
+ order = c_order(*s1) - c_order(*s2);
+ if (order != 0)
+ return order;
+ s1++;
+ s2++;
}
- return 0;
- }
+ while (*s1 == '0')
+ s1++;
+ while (*s2 == '0')
+ s2++;
+
+ first = 0;
+ while (is_digit(*s1) && is_digit(*s2)) {
+ if (first == 0)
+ first = *s1 - *s2;
+ s1++;
+ s2++;
+ }
- 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");
+ if (is_digit(*s1))
+ return 1;
+ if (is_digit(*s2))
+ return -1;
+
+ if (first != 0)
+ return first;
}
- return 0;
+ return strcmp(os1, os2);
}
-int version(void) {
- puts(PACKAGE_STRING "\n"
- SYSTEMD_FEATURES);
- return 0;
+/* Turn off core dumps but only if we're running outside of a container. */
+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");
}
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