/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-/***
- 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 <sched.h>
#include <signal.h>
#include <stdbool.h>
#include "format-util.h"
#include "ioprio.h"
#include "macro.h"
+#include "time-util.h"
#define procfs_file_alloca(pid, field) \
({ \
if (_pid_ == 0) { \
_r_ = ("/proc/self/" field); \
} else { \
- _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
+ _r_ = alloca(STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
} \
_r_; \
int get_process_ppid(pid_t pid, pid_t *ppid);
int wait_for_terminate(pid_t pid, siginfo_t *status);
-int wait_for_terminate_and_warn(const char *name, pid_t pid, bool check_exit_code);
+
+typedef enum WaitFlags {
+ WAIT_LOG_ABNORMAL = 1 << 0,
+ WAIT_LOG_NON_ZERO_EXIT_STATUS = 1 << 1,
+
+ /* A shortcut for requesting the most complete logging */
+ WAIT_LOG = WAIT_LOG_ABNORMAL|WAIT_LOG_NON_ZERO_EXIT_STATUS,
+} WaitFlags;
+
+int wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags);
+int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout);
void sigkill_wait(pid_t pid);
void sigkill_waitp(pid_t *pid);
+void sigterm_wait(pid_t pid);
int kill_and_sigcont(pid_t pid, int sig);
bool is_main_thread(void);
-noreturn void freeze(void);
+_noreturn_ void freeze(void);
bool oom_score_adjust_is_valid(int oa);
int sched_policy_to_string_alloc(int i, char **s);
int sched_policy_from_string(const char *s);
-#define PTR_TO_PID(p) ((pid_t) ((uintptr_t) p))
-#define PID_TO_PTR(p) ((void*) ((uintptr_t) p))
+static inline pid_t PTR_TO_PID(const void *p) {
+ return (pid_t) ((uintptr_t) p);
+}
+
+static inline void* PID_TO_PTR(pid_t pid) {
+ return (void*) ((uintptr_t) pid);
+}
void valgrind_summary_hack(void);
-int pid_compare_func(const void *a, const void *b);
+int pid_compare_func(const pid_t *a, const pid_t *b);
static inline bool nice_is_valid(int n) {
return n >= PRIO_MIN && n < PRIO_MAX;
return p > 0;
}
+static inline int sched_policy_to_string_alloc_with_check(int n, char **s) {
+ if (!sched_policy_is_valid(n))
+ return -EINVAL;
+
+ return sched_policy_to_string_alloc(n, s);
+}
+
int ioprio_parse_priority(const char *s, int *ret);
pid_t getpid_cached(void);
+void reset_cached_pid(void);
int must_be_root(void);
+
+typedef enum ForkFlags {
+ FORK_RESET_SIGNALS = 1 << 0,
+ FORK_CLOSE_ALL_FDS = 1 << 1,
+ FORK_DEATHSIG = 1 << 2,
+ FORK_NULL_STDIO = 1 << 3,
+ FORK_REOPEN_LOG = 1 << 4,
+ FORK_LOG = 1 << 5,
+ FORK_WAIT = 1 << 6,
+ FORK_NEW_MOUNTNS = 1 << 7,
+ FORK_MOUNTNS_SLAVE = 1 << 8,
+} ForkFlags;
+
+int safe_fork_full(const char *name, const int except_fds[], size_t n_except_fds, ForkFlags flags, pid_t *ret_pid);
+
+static inline int safe_fork(const char *name, ForkFlags flags, pid_t *ret_pid) {
+ return safe_fork_full(name, NULL, 0, flags, ret_pid);
+}
+
+int fork_agent(const char *name, const int except[], size_t n_except, pid_t *pid, const char *path, ...);
+
+int set_oom_score_adjust(int value);
+
+#if SIZEOF_PID_T == 4
+/* The highest possibly (theoretic) pid_t value on this architecture. */
+#define PID_T_MAX ((pid_t) INT32_MAX)
+/* The maximum number of concurrent processes Linux allows on this architecture, as well as the highest valid PID value
+ * the kernel will potentially assign. This reflects a value compiled into the kernel (PID_MAX_LIMIT), and sets the
+ * upper boundary on what may be written to the /proc/sys/kernel/pid_max sysctl (but do note that the sysctl is off by
+ * 1, since PID 0 can never exist and there can hence only be one process less than the limit would suggest). Since
+ * these values are documented in proc(5) we feel quite confident that they are stable enough for the near future at
+ * least to define them here too. */
+#define TASKS_MAX 4194303U
+#elif SIZEOF_PID_T == 2
+#define PID_T_MAX ((pid_t) INT16_MAX)
+#define TASKS_MAX 32767U
+#else
+#error "Unknown pid_t size"
+#endif
+
+assert_cc(TASKS_MAX <= (unsigned long) PID_T_MAX)
+
+/* Like TAKE_PTR() but for child PIDs, resetting them to 0 */
+#define TAKE_PID(pid) \
+ ({ \
+ pid_t _pid_ = (pid); \
+ (pid) = 0; \
+ _pid_; \
+ })