15263807472

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <signal.h>

#include "fileio.h"
#include "format-util.h"
#include "forward.h"
#include "string-util.h"

#define procfs_file_alloca(pid, field)                                  \
        ({                                                              \
                pid_t _pid_ = (pid);                                    \
                const char *_field_ = (field);                          \
                char *_r_;                                              \
                if (_pid_ == 0)                                         \
                        _r_ = strjoina("/proc/self/", _field_);         \
                else {                                                  \
                        assert(_pid_ > 0);                              \
                        _r_ = newa(char, STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + strlen(_field_) + 1); \
                        sprintf(_r_, "/proc/" PID_FMT "/%s", _pid_, _field_); \
                }                                                       \
                (const char*) _r_;                                      \
        })

static inline int procfs_file_get_field(pid_t pid, const char *name, const char *key, char **ret) {
        return get_proc_field(procfs_file_alloca(pid, name), key, ret);
}

typedef enum ProcessCmdlineFlags {
        PROCESS_CMDLINE_COMM_FALLBACK = 1 << 0,
        PROCESS_CMDLINE_USE_LOCALE    = 1 << 1,
        PROCESS_CMDLINE_QUOTE         = 1 << 2,
        PROCESS_CMDLINE_QUOTE_POSIX   = 1 << 3,
} ProcessCmdlineFlags;

int pid_get_comm(pid_t pid, char **ret);
int pidref_get_comm(const PidRef *pid, char **ret);
int pid_get_cmdline(pid_t pid, size_t max_columns, ProcessCmdlineFlags flags, char **ret);
int pidref_get_cmdline(const PidRef *pid, size_t max_columns, ProcessCmdlineFlags flags, char **ret);
int pid_get_cmdline_strv(pid_t pid, ProcessCmdlineFlags flags, char ***ret);
int pidref_get_cmdline_strv(const PidRef *pid, ProcessCmdlineFlags flags, char ***ret);
int get_process_exe(pid_t pid, char **ret);
int pid_get_uid(pid_t pid, uid_t *ret);
int pidref_get_uid(const PidRef *pid, uid_t *ret);
int get_process_gid(pid_t pid, gid_t *ret);
int get_process_cwd(pid_t pid, char **ret);
int get_process_root(pid_t pid, char **ret);
int get_process_environ(pid_t pid, char **ret);
int pid_get_ppid(pid_t pid, pid_t *ret);
int pidref_get_ppid(const PidRef *pidref, pid_t *ret);
int pidref_get_ppid_as_pidref(const PidRef *pidref, PidRef *ret);
int pid_get_start_time(pid_t pid, usec_t *ret);
int pidref_get_start_time(const PidRef *pid, usec_t *ret);
int get_process_umask(pid_t pid, mode_t *ret);

int container_get_leader(const char *machine, pid_t *pid);

static inline bool SIGINFO_CODE_IS_DEAD(int code) {
        return IN_SET(code, CLD_EXITED, CLD_KILLED, CLD_DUMPED);
}

int wait_for_terminate(pid_t pid, siginfo_t *ret);

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 pidref_wait_for_terminate_and_check(const char *name, PidRef *pidref, WaitFlags flags);
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);
void sigkill_nowait(pid_t pid);
void sigkill_nowaitp(pid_t *pid);

int kill_and_sigcont(pid_t pid, int sig);

int pid_is_kernel_thread(pid_t pid);
int pidref_is_kernel_thread(const PidRef *pid);

int getenv_for_pid(pid_t pid, const char *field, char **_value);

int pid_is_alive(pid_t pid);
int pidref_is_alive(const PidRef *pidref);
int pid_is_unwaited(pid_t pid);
int pidref_is_unwaited(PidRef *pidref);
int pid_is_my_child(pid_t pid);
int pidref_is_my_child(PidRef *pidref);
int pidref_from_same_root_fs(PidRef *a, PidRef *b);

bool is_main_thread(void);

bool oom_score_adjust_is_valid(int oa);

#ifndef PERSONALITY_INVALID
/* personality(2) documents that 0xFFFFFFFFUL is used for querying the
 * current personality, hence let's use that here as error
 * indicator. */
#define PERSONALITY_INVALID 0xFFFFFFFFUL
#endif

/* The personality() syscall returns a 32-bit value where the top three bytes are reserved for flags that
 * emulate historical or architectural quirks, and only the least significant byte reflects the actual
 * personality we're interested in. */
#define OPINIONATED_PERSONALITY_MASK 0xFFUL

unsigned long personality_from_string(const char *p);
const char* personality_to_string(unsigned long);

int safe_personality(unsigned long p);
int opinionated_personality(unsigned long *ret);

const char* sigchld_code_to_string(int i) _const_;
int sigchld_code_from_string(const char *s) _pure_;

int sched_policy_to_string_alloc(int i, char **s);
int sched_policy_from_string(const char *s);

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 pid_t *a, const pid_t *b);

bool nice_is_valid(int n);

bool sched_policy_is_valid(int i) _const_;
bool sched_priority_is_valid(int i) _const_;

#define PID_AUTOMATIC ((pid_t) INT_MIN) /* special value indicating "acquire pid from connection peer" */

static inline bool pid_is_valid(pid_t p) {
        return p > 0;
}

static inline bool pid_is_automatic(pid_t p) {
        return p == PID_AUTOMATIC;
}

pid_t getpid_cached(void);
void reset_cached_pid(void);

int must_be_root(void);

pid_t clone_with_nested_stack(int (*fn)(void *), int flags, void *userdata);

/* 💣 Note that FORK_NEW_USERNS, FORK_NEW_MOUNTNS, FORK_NEW_NETNS or FORK_NEW_PIDNS should not be called in threaded
 * programs, because they cause us to use raw_clone() which does not synchronize the glibc malloc() locks,
 * and thus will cause deadlocks if the parent uses threads and the child does memory allocations. Hence: if
 * the parent is threaded these flags may not be used. These flags cannot be used if the parent uses threads
 * or the child uses malloc(). 💣 */
typedef enum ForkFlags {
        FORK_RESET_SIGNALS      = 1 <<  0, /* Reset all signal handlers and signal mask */
        FORK_CLOSE_ALL_FDS      = 1 <<  1, /* Close all open file descriptors in the child, except for 0,1,2 */
        FORK_DEATHSIG_SIGTERM   = 1 <<  2, /* Set PR_DEATHSIG in the child to SIGTERM */
        FORK_DEATHSIG_SIGINT    = 1 <<  3, /* Set PR_DEATHSIG in the child to SIGINT */
        FORK_DEATHSIG_SIGKILL   = 1 <<  4, /* Set PR_DEATHSIG in the child to SIGKILL */
        FORK_REARRANGE_STDIO    = 1 <<  5, /* Connect 0,1,2 to specified fds or /dev/null */
        FORK_REOPEN_LOG         = 1 <<  6, /* Reopen log connection */
        FORK_LOG                = 1 <<  7, /* Log above LOG_DEBUG log level about failures */
        FORK_WAIT               = 1 <<  8, /* Wait until child exited */
        FORK_MOUNTNS_SLAVE      = 1 <<  9, /* Make child's mount namespace MS_SLAVE */
        FORK_PRIVATE_TMP        = 1 << 10, /* Mount new /tmp/ in the child (combine with FORK_NEW_MOUNTNS!) */
        FORK_RLIMIT_NOFILE_SAFE = 1 << 11, /* Set RLIMIT_NOFILE soft limit to 1K for select() compat */
        FORK_STDOUT_TO_STDERR   = 1 << 12, /* Make stdout a copy of stderr */
        FORK_FLUSH_STDIO        = 1 << 13, /* fflush() stdout (and stderr) before forking */
        FORK_CLOEXEC_OFF        = 1 << 14, /* In the child: turn off O_CLOEXEC on all fds in except_fds[] */
        FORK_KEEP_NOTIFY_SOCKET = 1 << 15, /* Unless this specified, $NOTIFY_SOCKET will be unset. */
        FORK_DETACH             = 1 << 16, /* Double fork if needed to ensure PID1/subreaper is parent */
        FORK_PACK_FDS           = 1 << 17, /* Rearrange the passed FDs to be FD 3,4,5,etc. Updates the array in place (combine with FORK_CLOSE_ALL_FDS!) */
        FORK_NEW_MOUNTNS        = 1 << 18, /* Run child in its own mount namespace                               💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
        FORK_NEW_USERNS         = 1 << 19, /* Run child in its own user namespace                                💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
        FORK_NEW_NETNS          = 1 << 20, /* Run child in its own network namespace                             💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
        FORK_NEW_PIDNS          = 1 << 21, /* Run child in its own PID namespace                                 💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
        FORK_FREEZE             = 1 << 22, /* Don't return in child, just call freeze() instead */
        FORK_PID_ONLY           = 1 << 23, /* Don't open a pidfd referencing the child process */
} ForkFlags;

int pidref_safe_fork_full(
                const char *name,
                const int stdio_fds[3],
                int except_fds[],
                size_t n_except_fds,
                ForkFlags flags,
                PidRef *ret_pid);

static inline int pidref_safe_fork(const char *name, ForkFlags flags, PidRef *ret_pid) {
        return pidref_safe_fork_full(name, NULL, NULL, 0, flags, ret_pid);
}

int safe_fork_full(
                const char *name,
                const int stdio_fds[3],
                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, NULL, 0, flags, ret_pid);
}

int namespace_fork(
                const char *outer_name,
                const char *inner_name,
                int except_fds[],
                size_t n_except_fds,
                ForkFlags flags,
                int pidns_fd,
                int mntns_fd,
                int netns_fd,
                int userns_fd,
                int root_fd,
                pid_t *ret_pid);

int set_oom_score_adjust(int value);
int get_oom_score_adjust(int *ret);

/* 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

assert_cc(TASKS_MAX <= (unsigned long) PID_T_MAX);

/* Like TAKE_PTR() but for pid_t, resetting them to 0 */
#define TAKE_PID(pid) TAKE_GENERIC(pid, pid_t, 0)

int setpriority_closest(int priority);

_noreturn_ void freeze(void);

int get_process_threads(pid_t pid);

int is_reaper_process(void);
int make_reaper_process(bool b);

int posix_spawn_wrapper(
                const char *path,
                char * const *argv,
                char * const *envp,
                const char *cgroup,
                PidRef *ret_pidref);

int proc_dir_open(DIR **ret);
int proc_dir_read(DIR *d, pid_t *ret);
int proc_dir_read_pidref(DIR *d, PidRef *ret);

_noreturn_ void report_errno_and_exit(int errno_fd, int error);
int read_errno(int errno_fd);

1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
2	#pragma once
3
4	#include <signal.h>
5
6	#include "fileio.h"
7	#include "format-util.h"
8	#include "forward.h"
9	#include "string-util.h"
10
11	#define procfs_file_alloca(pid, field) \
12	({ \
13	pid_t _pid_ = (pid); \
14	const char *_field_ = (field); \
15	char *_r_; \
16	if (_pid_ == 0) \
17	_r_ = strjoina("/proc/self/", _field_); \
18	else { \
19	assert(_pid_ > 0); \
20	_r_ = newa(char, STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + strlen(_field_) + 1); \
21	sprintf(_r_, "/proc/" PID_FMT "/%s", _pid_, _field_); \
22	} \
23	(const char*) _r_; \
24	})
25
26	static inline int procfs_file_get_field(pid_t pid, const char name, const char key, char **ret) {	26,329✔
27	return get_proc_field(procfs_file_alloca(pid, name), key, ret);	101,089✔
28	}
29
30	typedef enum ProcessCmdlineFlags {
31	PROCESS_CMDLINE_COMM_FALLBACK = 1 << 0,
32	PROCESS_CMDLINE_USE_LOCALE = 1 << 1,
33	PROCESS_CMDLINE_QUOTE = 1 << 2,
34	PROCESS_CMDLINE_QUOTE_POSIX = 1 << 3,
35	} ProcessCmdlineFlags;
36
37	int pid_get_comm(pid_t pid, char **ret);	47,112✔
38	int pidref_get_comm(const PidRef pid, char *ret);	30✔
39	int pid_get_cmdline(pid_t pid, size_t max_columns, ProcessCmdlineFlags flags, char **ret);	13,932✔
40	int pidref_get_cmdline(const PidRef pid, size_t max_columns, ProcessCmdlineFlags flags, char *ret);	119✔
41	int pid_get_cmdline_strv(pid_t pid, ProcessCmdlineFlags flags, char ***ret);	4,865✔
UNCOV 42	int pidref_get_cmdline_strv(const PidRef pid, ProcessCmdlineFlags flags, char **ret);	×
43	int get_process_exe(pid_t pid, char **ret);	13,244✔
44	int pid_get_uid(pid_t pid, uid_t *ret);	3,826✔
45	int pidref_get_uid(const PidRef pid, uid_t ret);	54✔
46	int get_process_gid(pid_t pid, gid_t *ret);	3,817✔
47	int get_process_cwd(pid_t pid, char **ret);	14✔
48	int get_process_root(pid_t pid, char **ret);	14✔
49	int get_process_environ(pid_t pid, char **ret);	16✔
50	int pid_get_ppid(pid_t pid, pid_t *ret);	1,399✔
51	int pidref_get_ppid(const PidRef pidref, pid_t ret);	2,414✔
52	int pidref_get_ppid_as_pidref(const PidRef pidref, PidRef ret);	17✔
53	int pid_get_start_time(pid_t pid, usec_t *ret);	659✔
54	int pidref_get_start_time(const PidRef pid, usec_t ret);	659✔
55	int get_process_umask(pid_t pid, mode_t *ret);	18,684✔
56
57	int container_get_leader(const char machine, pid_t pid);	11✔
58
59	static inline bool SIGINFO_CODE_IS_DEAD(int code) {	33,407✔
60	return IN_SET(code, CLD_EXITED, CLD_KILLED, CLD_DUMPED);	33,407✔
61	}
62
63	int wait_for_terminate(pid_t pid, siginfo_t *ret);	800✔
64
65	typedef enum WaitFlags {
66	WAIT_LOG_ABNORMAL = 1 << 0,
67	WAIT_LOG_NON_ZERO_EXIT_STATUS = 1 << 1,
68
69	/* A shortcut for requesting the most complete logging */
70	WAIT_LOG = WAIT_LOG_ABNORMAL\|WAIT_LOG_NON_ZERO_EXIT_STATUS,
71	} WaitFlags;
72
73	int pidref_wait_for_terminate_and_check(const char name, PidRef pidref, WaitFlags flags);	9,137✔
74	int wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags);	8,016✔
75
UNCOV 76	int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout);	×
77
78	void sigkill_wait(pid_t pid);	50✔
79	void sigkill_waitp(pid_t *pid);	11,763✔
80	void sigterm_wait(pid_t pid);	69✔
UNCOV 81	void sigkill_nowait(pid_t pid);	×
UNCOV 82	void sigkill_nowaitp(pid_t *pid);	×
83
84	int kill_and_sigcont(pid_t pid, int sig);	69✔
85
86	int pid_is_kernel_thread(pid_t pid);	3,516✔
87	int pidref_is_kernel_thread(const PidRef *pid);	1,461✔
88
89	int getenv_for_pid(pid_t pid, const char field, char *_value);	4,701✔
90
91	int pid_is_alive(pid_t pid);	10,309✔
92	int pidref_is_alive(const PidRef *pidref);	10,304✔
93	int pid_is_unwaited(pid_t pid);	8,408✔
94	int pidref_is_unwaited(PidRef *pidref);	9,063✔
UNCOV 95	int pid_is_my_child(pid_t pid);	×
96	int pidref_is_my_child(PidRef *pidref);	2,380✔
97	int pidref_from_same_root_fs(PidRef a, PidRef b);	13,656✔
98
99	bool is_main_thread(void);	6,952,732✔
100
101	bool oom_score_adjust_is_valid(int oa);	5,757✔
102
103	#ifndef PERSONALITY_INVALID
104	/* personality(2) documents that 0xFFFFFFFFUL is used for querying the
105	* current personality, hence let's use that here as error
106	* indicator. */
107	#define PERSONALITY_INVALID 0xFFFFFFFFUL
108	#endif
109
110	/* The personality() syscall returns a 32-bit value where the top three bytes are reserved for flags that
111	* emulate historical or architectural quirks, and only the least significant byte reflects the actual
112	* personality we're interested in. */
113	#define OPINIONATED_PERSONALITY_MASK 0xFFUL
114
115	unsigned long personality_from_string(const char *p);	9✔
116	const char* personality_to_string(unsigned long);	1,309✔
117
118	int safe_personality(unsigned long p);	1,508✔
119	int opinionated_personality(unsigned long *ret);	1,493✔
120
121	const char* sigchld_code_to_string(int i) _const_;	7,647✔
UNCOV 122	int sigchld_code_from_string(const char *s) _pure_;	×
123
UNCOV 124	int sched_policy_to_string_alloc(int i, char **s);	×
125	int sched_policy_from_string(const char *s);	3✔
126
127	static inline pid_t PTR_TO_PID(const void *p) {	1,215✔
128	return (pid_t) ((uintptr_t) p);	1,215✔
129	}
130
131	static inline void* PID_TO_PTR(pid_t pid) {	417,910✔
132	return (void*) ((uintptr_t) pid);	417,871✔
133	}
134
135	void valgrind_summary_hack(void);	47✔
136
137	int pid_compare_func(const pid_t a, const pid_t b);	1,677✔
138
139	bool nice_is_valid(int n);	748✔
140
UNCOV 141	bool sched_policy_is_valid(int i) _const_;	×
UNCOV 142	bool sched_priority_is_valid(int i) _const_;	×
143
144	#define PID_AUTOMATIC ((pid_t) INT_MIN) /* special value indicating "acquire pid from connection peer" */
145
146	static inline bool pid_is_valid(pid_t p) {
147	return p > 0;
148	}
149
150	static inline bool pid_is_automatic(pid_t p) {	1✔
151	return p == PID_AUTOMATIC;	1✔
152	}
153
154	pid_t getpid_cached(void);	88,764,532✔
155	void reset_cached_pid(void);	3,227✔
156
157	int must_be_root(void);	59✔
158
159	pid_t clone_with_nested_stack(int (fn)(void ), int flags, void *userdata);	2,953✔
160
161	/* 💣 Note that FORK_NEW_USERNS, FORK_NEW_MOUNTNS, FORK_NEW_NETNS or FORK_NEW_PIDNS should not be called in threaded
162	* programs, because they cause us to use raw_clone() which does not synchronize the glibc malloc() locks,
163	* and thus will cause deadlocks if the parent uses threads and the child does memory allocations. Hence: if
164	* the parent is threaded these flags may not be used. These flags cannot be used if the parent uses threads
165	* or the child uses malloc(). 💣 */
166	typedef enum ForkFlags {
167	FORK_RESET_SIGNALS = 1 << 0, /* Reset all signal handlers and signal mask */
168	FORK_CLOSE_ALL_FDS = 1 << 1, /* Close all open file descriptors in the child, except for 0,1,2 */
169	FORK_DEATHSIG_SIGTERM = 1 << 2, /* Set PR_DEATHSIG in the child to SIGTERM */
170	FORK_DEATHSIG_SIGINT = 1 << 3, /* Set PR_DEATHSIG in the child to SIGINT */
171	FORK_DEATHSIG_SIGKILL = 1 << 4, /* Set PR_DEATHSIG in the child to SIGKILL */
172	FORK_REARRANGE_STDIO = 1 << 5, /* Connect 0,1,2 to specified fds or /dev/null */
173	FORK_REOPEN_LOG = 1 << 6, /* Reopen log connection */
174	FORK_LOG = 1 << 7, /* Log above LOG_DEBUG log level about failures */
175	FORK_WAIT = 1 << 8, /* Wait until child exited */
176	FORK_MOUNTNS_SLAVE = 1 << 9, /* Make child's mount namespace MS_SLAVE */
177	FORK_PRIVATE_TMP = 1 << 10, /* Mount new /tmp/ in the child (combine with FORK_NEW_MOUNTNS!) */
178	FORK_RLIMIT_NOFILE_SAFE = 1 << 11, /* Set RLIMIT_NOFILE soft limit to 1K for select() compat */
179	FORK_STDOUT_TO_STDERR = 1 << 12, /* Make stdout a copy of stderr */
180	FORK_FLUSH_STDIO = 1 << 13, /* fflush() stdout (and stderr) before forking */
181	FORK_CLOEXEC_OFF = 1 << 14, /* In the child: turn off O_CLOEXEC on all fds in except_fds[] */
182	FORK_KEEP_NOTIFY_SOCKET = 1 << 15, /* Unless this specified, $NOTIFY_SOCKET will be unset. */
183	FORK_DETACH = 1 << 16, /* Double fork if needed to ensure PID1/subreaper is parent */
184	FORK_PACK_FDS = 1 << 17, /* Rearrange the passed FDs to be FD 3,4,5,etc. Updates the array in place (combine with FORK_CLOSE_ALL_FDS!) */
185	FORK_NEW_MOUNTNS = 1 << 18, /* Run child in its own mount namespace 💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
186	FORK_NEW_USERNS = 1 << 19, /* Run child in its own user namespace 💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
187	FORK_NEW_NETNS = 1 << 20, /* Run child in its own network namespace 💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
188	FORK_NEW_PIDNS = 1 << 21, /* Run child in its own PID namespace 💣 DO NOT USE IN THREADED PROGRAMS! 💣 */
189	FORK_FREEZE = 1 << 22, /* Don't return in child, just call freeze() instead */
190	FORK_PID_ONLY = 1 << 23, /* Don't open a pidfd referencing the child process */
191	} ForkFlags;
192
193	int pidref_safe_fork_full(	31,836✔
194	const char *name,
195	const int stdio_fds[3],
196	int except_fds[],
197	size_t n_except_fds,
198	ForkFlags flags,
199	PidRef *ret_pid);
200
201	static inline int pidref_safe_fork(const char name, ForkFlags flags, PidRef ret_pid) {	6,391✔
202	return pidref_safe_fork_full(name, NULL, NULL, 0, flags, ret_pid);	6,391✔
203	}
204
205	int safe_fork_full(	13,233✔
206	const char *name,
207	const int stdio_fds[3],
208	int except_fds[],
209	size_t n_except_fds,
210	ForkFlags flags,
211	pid_t *ret_pid);
212
213	static inline int safe_fork(const char name, ForkFlags flags, pid_t ret_pid) {	9,094✔
214	return safe_fork_full(name, NULL, NULL, 0, flags, ret_pid);	9,094✔
215	}
216
217	int namespace_fork(	166✔
218	const char *outer_name,
219	const char *inner_name,
220	int except_fds[],
221	size_t n_except_fds,
222	ForkFlags flags,
223	int pidns_fd,
224	int mntns_fd,
225	int netns_fd,
226	int userns_fd,
227	int root_fd,
228	pid_t *ret_pid);
229
230	int set_oom_score_adjust(int value);	3,995✔
231	int get_oom_score_adjust(int *ret);	1,070✔
232
233	/* The highest possibly (theoretic) pid_t value on this architecture. */
234	#define PID_T_MAX ((pid_t) INT32_MAX)
235	/* The maximum number of concurrent processes Linux allows on this architecture, as well as the highest valid PID value
236	* the kernel will potentially assign. This reflects a value compiled into the kernel (PID_MAX_LIMIT), and sets the
237	* upper boundary on what may be written to the /proc/sys/kernel/pid_max sysctl (but do note that the sysctl is off by
238	* 1, since PID 0 can never exist and there can hence only be one process less than the limit would suggest). Since
239	* these values are documented in proc(5) we feel quite confident that they are stable enough for the near future at
240	* least to define them here too. */
241	#define TASKS_MAX 4194303U
242
243	assert_cc(TASKS_MAX <= (unsigned long) PID_T_MAX);
244
245	/* Like TAKE_PTR() but for pid_t, resetting them to 0 */
246	#define TAKE_PID(pid) TAKE_GENERIC(pid, pid_t, 0)
247
248	int setpriority_closest(int priority);	23✔
249
UNCOV 250	_noreturn_ void freeze(void);	×
251
252	int get_process_threads(pid_t pid);	7✔
253
254	int is_reaper_process(void);	3,056✔
255	int make_reaper_process(bool b);	600✔
256
257	int posix_spawn_wrapper(	2,213✔
258	const char *path,
259	char * const *argv,
260	char * const *envp,
261	const char *cgroup,
262	PidRef *ret_pidref);
263
264	int proc_dir_open(DIR **ret);	11✔
265	int proc_dir_read(DIR d, pid_t ret);	1,017✔
266	int proc_dir_read_pidref(DIR d, PidRef ret);	973✔
267
268	_noreturn_ void report_errno_and_exit(int errno_fd, int error);	48✔
269	int read_errno(int errno_fd);	1✔

systemd / systemd / 15263807472

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