1 /* SPDX-License-Identifier: LGPL-2.1+ */
12 #include <sys/resource.h>
13 #include <sys/types.h>
15 #include "alloc-util.h"
16 #include "format-util.h"
19 #include "time-util.h"
21 #define procfs_file_alloca(pid, field) \
23 pid_t _pid_ = (pid); \
26 _r_ = ("/proc/self/" field); \
28 _r_ = newa(char, STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
29 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
34 int get_process_state(pid_t pid
);
35 int get_process_comm(pid_t pid
, char **name
);
36 int get_process_cmdline(pid_t pid
, size_t max_length
, bool comm_fallback
, char **line
);
37 int get_process_exe(pid_t pid
, char **name
);
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
);
46 int wait_for_terminate(pid_t pid
, siginfo_t
*status
);
48 typedef enum WaitFlags
{
49 WAIT_LOG_ABNORMAL
= 1 << 0,
50 WAIT_LOG_NON_ZERO_EXIT_STATUS
= 1 << 1,
52 /* A shortcut for requesting the most complete logging */
53 WAIT_LOG
= WAIT_LOG_ABNORMAL
|WAIT_LOG_NON_ZERO_EXIT_STATUS
,
56 int wait_for_terminate_and_check(const char *name
, pid_t pid
, WaitFlags flags
);
57 int wait_for_terminate_with_timeout(pid_t pid
, usec_t timeout
);
59 void sigkill_wait(pid_t pid
);
60 void sigkill_waitp(pid_t
*pid
);
61 void sigterm_wait(pid_t pid
);
63 int kill_and_sigcont(pid_t pid
, int sig
);
65 int rename_process(const char name
[]);
66 int is_kernel_thread(pid_t pid
);
68 int getenv_for_pid(pid_t pid
, const char *field
, char **_value
);
70 bool pid_is_alive(pid_t pid
);
71 bool pid_is_unwaited(pid_t pid
);
72 int pid_is_my_child(pid_t pid
);
73 int pid_from_same_root_fs(pid_t pid
);
75 bool is_main_thread(void);
77 _noreturn_
void freeze(void);
79 bool oom_score_adjust_is_valid(int oa
);
81 #ifndef PERSONALITY_INVALID
82 /* personality(7) documents that 0xffffffffUL is used for querying the
83 * current personality, hence let's use that here as error
85 #define PERSONALITY_INVALID 0xffffffffLU
88 unsigned long personality_from_string(const char *p
);
89 const char *personality_to_string(unsigned long);
91 int safe_personality(unsigned long p
);
92 int opinionated_personality(unsigned long *ret
);
94 int ioprio_class_to_string_alloc(int i
, char **s
);
95 int ioprio_class_from_string(const char *s
);
97 const char *sigchld_code_to_string(int i
) _const_
;
98 int sigchld_code_from_string(const char *s
) _pure_
;
100 int sched_policy_to_string_alloc(int i
, char **s
);
101 int sched_policy_from_string(const char *s
);
103 static inline pid_t
PTR_TO_PID(const void *p
) {
104 return (pid_t
) ((uintptr_t) p
);
107 static inline void* PID_TO_PTR(pid_t pid
) {
108 return (void*) ((uintptr_t) pid
);
111 void valgrind_summary_hack(void);
113 int pid_compare_func(const pid_t
*a
, const pid_t
*b
);
115 static inline bool nice_is_valid(int n
) {
116 return n
>= PRIO_MIN
&& n
< PRIO_MAX
;
119 static inline bool sched_policy_is_valid(int i
) {
120 return IN_SET(i
, SCHED_OTHER
, SCHED_BATCH
, SCHED_IDLE
, SCHED_FIFO
, SCHED_RR
);
123 static inline bool sched_priority_is_valid(int i
) {
124 return i
>= 0 && i
<= sched_get_priority_max(SCHED_RR
);
127 static inline bool ioprio_class_is_valid(int i
) {
128 return IN_SET(i
, IOPRIO_CLASS_NONE
, IOPRIO_CLASS_RT
, IOPRIO_CLASS_BE
, IOPRIO_CLASS_IDLE
);
131 static inline bool ioprio_priority_is_valid(int i
) {
132 return i
>= 0 && i
< IOPRIO_BE_NR
;
135 static inline bool pid_is_valid(pid_t p
) {
139 int ioprio_parse_priority(const char *s
, int *ret
);
141 pid_t
getpid_cached(void);
142 void reset_cached_pid(void);
144 int must_be_root(void);
146 typedef enum ForkFlags
{
147 FORK_RESET_SIGNALS
= 1 << 0, /* Reset all signal handlers and signal mask */
148 FORK_CLOSE_ALL_FDS
= 1 << 1, /* Close all open file descriptors in the child, except for 0,1,2 */
149 FORK_DEATHSIG
= 1 << 2, /* Set PR_DEATHSIG in the child */
150 FORK_NULL_STDIO
= 1 << 3, /* Connect 0,1,2 to /dev/null */
151 FORK_REOPEN_LOG
= 1 << 4, /* Reopen log connection */
152 FORK_LOG
= 1 << 5, /* Log above LOG_DEBUG log level about failures */
153 FORK_WAIT
= 1 << 6, /* Wait until child exited */
154 FORK_NEW_MOUNTNS
= 1 << 7, /* Run child in its own mount namespace */
155 FORK_MOUNTNS_SLAVE
= 1 << 8, /* Make child's mount namespace MS_SLAVE */
156 FORK_RLIMIT_NOFILE_SAFE
= 1 << 9, /* Set RLIMIT_NOFILE soft limit to 1K for select() compat */
159 int safe_fork_full(const char *name
, const int except_fds
[], size_t n_except_fds
, ForkFlags flags
, pid_t
*ret_pid
);
161 static inline int safe_fork(const char *name
, ForkFlags flags
, pid_t
*ret_pid
) {
162 return safe_fork_full(name
, NULL
, 0, flags
, ret_pid
);
165 int namespace_fork(const char *outer_name
, const char *inner_name
, const 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
);
167 int fork_agent(const char *name
, const int except
[], size_t n_except
, pid_t
*pid
, const char *path
, ...) _sentinel_
;
169 int set_oom_score_adjust(int value
);
171 #if SIZEOF_PID_T == 4
172 /* The highest possibly (theoretic) pid_t value on this architecture. */
173 #define PID_T_MAX ((pid_t) INT32_MAX)
174 /* The maximum number of concurrent processes Linux allows on this architecture, as well as the highest valid PID value
175 * the kernel will potentially assign. This reflects a value compiled into the kernel (PID_MAX_LIMIT), and sets the
176 * upper boundary on what may be written to the /proc/sys/kernel/pid_max sysctl (but do note that the sysctl is off by
177 * 1, since PID 0 can never exist and there can hence only be one process less than the limit would suggest). Since
178 * these values are documented in proc(5) we feel quite confident that they are stable enough for the near future at
179 * least to define them here too. */
180 #define TASKS_MAX 4194303U
181 #elif SIZEOF_PID_T == 2
182 #define PID_T_MAX ((pid_t) INT16_MAX)
183 #define TASKS_MAX 32767U
185 #error "Unknown pid_t size"
188 assert_cc(TASKS_MAX
<= (unsigned long) PID_T_MAX
)
190 /* Like TAKE_PTR() but for child PIDs, resetting them to 0 */
191 #define TAKE_PID(pid) \
193 pid_t _pid_ = (pid); \
198 int cpus_in_affinity_mask(void);