1 /* SPDX-License-Identifier: LGPL-2.1+ */
12 #include <sys/resource.h>
13 #include <sys/types.h>
15 #include "format-util.h"
18 #include "time-util.h"
20 #define procfs_file_alloca(pid, field) \
22 pid_t _pid_ = (pid); \
25 _r_ = ("/proc/self/" field); \
27 _r_ = alloca(STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
28 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
33 int get_process_state(pid_t pid);
34 int get_process_comm(pid_t pid, char **name);
35 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
36 int get_process_exe(pid_t pid, char **name);
37 #if 0 /// UNNEEDED by elogind
38 int get_process_uid(pid_t pid, uid_t *uid);
39 int get_process_gid(pid_t pid, gid_t *gid);
40 int get_process_capeff(pid_t pid, char **capeff);
41 int get_process_cwd(pid_t pid, char **cwd);
42 int get_process_root(pid_t pid, char **root);
43 int get_process_environ(pid_t pid, char **environ);
44 int get_process_ppid(pid_t pid, pid_t *ppid);
47 int wait_for_terminate(pid_t pid, siginfo_t *status);
49 typedef enum WaitFlags {
50 WAIT_LOG_ABNORMAL = 1 << 0,
51 WAIT_LOG_NON_ZERO_EXIT_STATUS = 1 << 1,
53 /* A shortcut for requesting the most complete logging */
54 WAIT_LOG = WAIT_LOG_ABNORMAL|WAIT_LOG_NON_ZERO_EXIT_STATUS,
57 int wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags);
58 int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout);
59 #if 0 /// UNNEEDED by elogind
61 void sigkill_wait(pid_t pid);
62 void sigkill_waitp(pid_t *pid);
64 void sigterm_wait(pid_t pid);
66 int kill_and_sigcont(pid_t pid, int sig);
68 int rename_process(const char name[]);
69 int is_kernel_thread(pid_t pid);
71 int getenv_for_pid(pid_t pid, const char *field, char **_value);
73 bool pid_is_alive(pid_t pid);
74 bool pid_is_unwaited(pid_t pid);
75 #if 0 /// UNNEEDED by elogind
76 int pid_from_same_root_fs(pid_t pid);
79 bool is_main_thread(void);
81 #if 0 /// UNNEEDED by elogind
82 _noreturn_ void freeze(void);
84 bool oom_score_adjust_is_valid(int oa);
87 #ifndef PERSONALITY_INVALID
88 /* personality(7) documents that 0xffffffffUL is used for querying the
89 * current personality, hence let's use that here as error
91 #define PERSONALITY_INVALID 0xffffffffLU
94 #if 0 /// UNNEEDED by elogind
95 unsigned long personality_from_string(const char *p);
96 const char *personality_to_string(unsigned long);
98 int safe_personality(unsigned long p);
99 int opinionated_personality(unsigned long *ret);
101 int ioprio_class_to_string_alloc(int i, char **s);
102 int ioprio_class_from_string(const char *s);
104 const char *sigchld_code_to_string(int i) _const_;
105 int sigchld_code_from_string(const char *s) _pure_;
108 int sched_policy_to_string_alloc(int i, char **s);
109 #if 0 /// UNNEEDED by elogind
110 int sched_policy_from_string(const char *s);
113 static inline pid_t PTR_TO_PID(const void *p) {
114 return (pid_t) ((uintptr_t) p);
117 static inline void* PID_TO_PTR(pid_t pid) {
118 return (void*) ((uintptr_t) pid);
121 void valgrind_summary_hack(void);
123 int pid_compare_func(const void *a, const void *b);
125 #if 0 /// UNNEEDED by elogind
126 static inline bool nice_is_valid(int n) {
127 return n >= PRIO_MIN && n < PRIO_MAX;
131 static inline bool sched_policy_is_valid(int i) {
132 return IN_SET(i, SCHED_OTHER, SCHED_BATCH, SCHED_IDLE, SCHED_FIFO, SCHED_RR);
135 #if 0 /// UNNEEDED by elogind
136 static inline bool sched_priority_is_valid(int i) {
137 return i >= 0 && i <= sched_get_priority_max(SCHED_RR);
140 static inline bool ioprio_class_is_valid(int i) {
141 return IN_SET(i, IOPRIO_CLASS_NONE, IOPRIO_CLASS_RT, IOPRIO_CLASS_BE, IOPRIO_CLASS_IDLE);
144 static inline bool ioprio_priority_is_valid(int i) {
145 return i >= 0 && i < IOPRIO_BE_NR;
149 static inline bool pid_is_valid(pid_t p) {
153 static inline int sched_policy_to_string_alloc_with_check(int n, char **s) {
154 if (!sched_policy_is_valid(n))
157 return sched_policy_to_string_alloc(n, s);
160 #if 0 /// UNNEEDED by elogind
161 int ioprio_parse_priority(const char *s, int *ret);
164 pid_t getpid_cached(void);
165 void reset_cached_pid(void);
167 int must_be_root(void);
169 typedef enum ForkFlags {
170 FORK_RESET_SIGNALS = 1 << 0,
171 FORK_CLOSE_ALL_FDS = 1 << 1,
172 FORK_DEATHSIG = 1 << 2,
173 FORK_NULL_STDIO = 1 << 3,
174 FORK_REOPEN_LOG = 1 << 4,
177 FORK_NEW_MOUNTNS = 1 << 7,
178 FORK_MOUNTNS_SLAVE = 1 << 8,
181 int safe_fork_full(const char *name, const int except_fds[], size_t n_except_fds, ForkFlags flags, pid_t *ret_pid);
183 static inline int safe_fork(const char *name, ForkFlags flags, pid_t *ret_pid) {
184 return safe_fork_full(name, NULL, 0, flags, ret_pid);
187 int fork_agent(const char *name, const int except[], size_t n_except, pid_t *pid, const char *path, ...);
189 int set_oom_score_adjust(int value);
191 #if SIZEOF_PID_T == 4
192 /* The highest possibly (theoretic) pid_t value on this architecture. */
193 #define PID_T_MAX ((pid_t) INT32_MAX)
194 /* The maximum number of concurrent processes Linux allows on this architecture, as well as the highest valid PID value
195 * the kernel will potentially assign. This reflects a value compiled into the kernel (PID_MAX_LIMIT), and sets the
196 * upper boundary on what may be written to the /proc/sys/kernel/pid_max sysctl (but do note that the sysctl is off by
197 * 1, since PID 0 can never exist and there can hence only be one process less than the limit would suggest). Since
198 * these values are documented in proc(5) we feel quite confident that they are stable enough for the near future at
199 * least to define them here too. */
200 #define TASKS_MAX 4194303U
201 #elif SIZEOF_PID_T == 2
202 #define PID_T_MAX ((pid_t) INT16_MAX)
203 #define TASKS_MAX 32767U
205 #error "Unknown pid_t size"
208 assert_cc(TASKS_MAX <= (unsigned long) PID_T_MAX)
210 /* Like TAKE_PTR() but for child PIDs, resetting them to 0 */
211 #define TAKE_PID(pid) \
213 pid_t _pid_ = (pid); \