]>
Commit | Line | Data |
---|---|---|
db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
0b452006 RC |
2 | #pragma once |
3 | ||
dccca82b | 4 | #include <errno.h> |
29ea9f0f | 5 | #include <sched.h> |
71d35b6b TA |
6 | #include <signal.h> |
7 | #include <stdbool.h> | |
11c3a366 | 8 | #include <stddef.h> |
0b452006 RC |
9 | #include <stdio.h> |
10 | #include <string.h> | |
41bf0590 | 11 | #include <sys/resource.h> |
7f452159 | 12 | #include <sys/types.h> |
0b452006 | 13 | |
0cb8e3d1 | 14 | #include "alloc-util.h" |
f97b34a6 | 15 | #include "format-util.h" |
7b3e062c | 16 | #include "macro.h" |
d5641e0d | 17 | #include "time-util.h" |
0b452006 RC |
18 | |
19 | #define procfs_file_alloca(pid, field) \ | |
20 | ({ \ | |
21 | pid_t _pid_ = (pid); \ | |
a07f18cd LP |
22 | const char *_field_ = (field); \ |
23 | char *_r_; \ | |
0b452006 | 24 | if (_pid_ == 0) { \ |
a07f18cd LP |
25 | _r_ = newa(char, STRLEN("/proc/self/") + strlen(_field_) + 1); \ |
26 | strcpy(stpcpy(_r_, "/proc/self/"), _field_); \ | |
0b452006 | 27 | } else { \ |
a07f18cd LP |
28 | _r_ = newa(char, STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + strlen(_field_) + 1); \ |
29 | sprintf(_r_, "/proc/" PID_FMT "/%s", _pid_, _field_); \ | |
0b452006 | 30 | } \ |
a07f18cd | 31 | (const char*) _r_; \ |
0b452006 RC |
32 | }) |
33 | ||
09c1dcee ZJS |
34 | typedef enum ProcessCmdlineFlags { |
35 | PROCESS_CMDLINE_COMM_FALLBACK = 1 << 0, | |
e3b4efd2 | 36 | PROCESS_CMDLINE_USE_LOCALE = 1 << 1, |
61977664 | 37 | PROCESS_CMDLINE_QUOTE = 1 << 2, |
99009ed0 | 38 | PROCESS_CMDLINE_QUOTE_POSIX = 1 << 3, |
09c1dcee ZJS |
39 | } ProcessCmdlineFlags; |
40 | ||
95a511b7 YW |
41 | int get_process_comm(pid_t pid, char **ret); |
42 | int get_process_cmdline(pid_t pid, size_t max_columns, ProcessCmdlineFlags flags, char **ret); | |
43 | int get_process_exe(pid_t pid, char **ret); | |
44 | int get_process_uid(pid_t pid, uid_t *ret); | |
45 | int get_process_gid(pid_t pid, gid_t *ret); | |
46 | int get_process_capeff(pid_t pid, char **ret); | |
47 | int get_process_cwd(pid_t pid, char **ret); | |
48 | int get_process_root(pid_t pid, char **ret); | |
49 | int get_process_environ(pid_t pid, char **ret); | |
50 | int get_process_ppid(pid_t pid, pid_t *ret); | |
51 | int get_process_umask(pid_t pid, mode_t *ret); | |
0b452006 | 52 | |
3ec2ad35 ZJS |
53 | int container_get_leader(const char *machine, pid_t *pid); |
54 | ||
0b452006 | 55 | int wait_for_terminate(pid_t pid, siginfo_t *status); |
7d4904fe LP |
56 | |
57 | typedef enum WaitFlags { | |
ef31828d LP |
58 | WAIT_LOG_ABNORMAL = 1 << 0, |
59 | WAIT_LOG_NON_ZERO_EXIT_STATUS = 1 << 1, | |
7d4904fe LP |
60 | |
61 | /* A shortcut for requesting the most complete logging */ | |
62 | WAIT_LOG = WAIT_LOG_ABNORMAL|WAIT_LOG_NON_ZERO_EXIT_STATUS, | |
63 | } WaitFlags; | |
64 | ||
65 | int wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags); | |
d5641e0d | 66 | int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout); |
0b452006 | 67 | |
89c9030d LP |
68 | void sigkill_wait(pid_t pid); |
69 | void sigkill_waitp(pid_t *pid); | |
392cf1d0 | 70 | void sigterm_wait(pid_t pid); |
b293bb23 LP |
71 | void sigkill_nowait(pid_t pid); |
72 | void sigkill_nowaitp(pid_t *pid); | |
4d0d3d41 | 73 | |
0b452006 | 74 | int kill_and_sigcont(pid_t pid, int sig); |
405f8907 | 75 | |
0b452006 | 76 | int is_kernel_thread(pid_t pid); |
405f8907 | 77 | |
0b452006 RC |
78 | int getenv_for_pid(pid_t pid, const char *field, char **_value); |
79 | ||
80 | bool pid_is_alive(pid_t pid); | |
81 | bool pid_is_unwaited(pid_t pid); | |
4d051546 | 82 | int pid_is_my_child(pid_t pid); |
1359fffa | 83 | int pid_from_same_root_fs(pid_t pid); |
d4510856 LP |
84 | |
85 | bool is_main_thread(void); | |
ceee6d3a | 86 | |
c4412d4d LP |
87 | bool oom_score_adjust_is_valid(int oa); |
88 | ||
7b3e062c LP |
89 | #ifndef PERSONALITY_INVALID |
90 | /* personality(7) documents that 0xffffffffUL is used for querying the | |
91 | * current personality, hence let's use that here as error | |
92 | * indicator. */ | |
93 | #define PERSONALITY_INVALID 0xffffffffLU | |
94 | #endif | |
95 | ||
96 | unsigned long personality_from_string(const char *p); | |
97 | const char *personality_to_string(unsigned long); | |
98 | ||
21022b9d | 99 | int safe_personality(unsigned long p); |
e8132d63 LP |
100 | int opinionated_personality(unsigned long *ret); |
101 | ||
7b3e062c LP |
102 | const char *sigchld_code_to_string(int i) _const_; |
103 | int sigchld_code_from_string(const char *s) _pure_; | |
104 | ||
105 | int sched_policy_to_string_alloc(int i, char **s); | |
106 | int sched_policy_from_string(const char *s); | |
107 | ||
bc2fcf7f LP |
108 | static inline pid_t PTR_TO_PID(const void *p) { |
109 | return (pid_t) ((uintptr_t) p); | |
110 | } | |
111 | ||
112 | static inline void* PID_TO_PTR(pid_t pid) { | |
113 | return (void*) ((uintptr_t) pid); | |
114 | } | |
dcadc967 EV |
115 | |
116 | void valgrind_summary_hack(void); | |
291d565a | 117 | |
93bab288 | 118 | int pid_compare_func(const pid_t *a, const pid_t *b); |
41bf0590 LP |
119 | |
120 | static inline bool nice_is_valid(int n) { | |
121 | return n >= PRIO_MIN && n < PRIO_MAX; | |
122 | } | |
7f452159 | 123 | |
29ea9f0f YW |
124 | static inline bool sched_policy_is_valid(int i) { |
125 | return IN_SET(i, SCHED_OTHER, SCHED_BATCH, SCHED_IDLE, SCHED_FIFO, SCHED_RR); | |
126 | } | |
127 | ||
128 | static inline bool sched_priority_is_valid(int i) { | |
129 | return i >= 0 && i <= sched_get_priority_max(SCHED_RR); | |
130 | } | |
131 | ||
54191eb3 LP |
132 | static inline bool pid_is_valid(pid_t p) { |
133 | return p > 0; | |
134 | } | |
135 | ||
5c30a6d2 | 136 | pid_t getpid_cached(void); |
799a960d | 137 | void reset_cached_pid(void); |
fba868fa LP |
138 | |
139 | int must_be_root(void); | |
4c253ed1 LP |
140 | |
141 | typedef enum ForkFlags { | |
8987afc4 LP |
142 | FORK_RESET_SIGNALS = 1 << 0, /* Reset all signal handlers and signal mask */ |
143 | FORK_CLOSE_ALL_FDS = 1 << 1, /* Close all open file descriptors in the child, except for 0,1,2 */ | |
97033ba4 LP |
144 | FORK_DEATHSIG = 1 << 2, /* Set PR_DEATHSIG in the child to SIGTERM */ |
145 | FORK_DEATHSIG_SIGINT = 1 << 3, /* Set PR_DEATHSIG in the child to SIGINT */ | |
146 | FORK_NULL_STDIO = 1 << 4, /* Connect 0,1,2 to /dev/null */ | |
147 | FORK_REOPEN_LOG = 1 << 5, /* Reopen log connection */ | |
148 | FORK_LOG = 1 << 6, /* Log above LOG_DEBUG log level about failures */ | |
149 | FORK_WAIT = 1 << 7, /* Wait until child exited */ | |
150 | FORK_NEW_MOUNTNS = 1 << 8, /* Run child in its own mount namespace */ | |
151 | FORK_MOUNTNS_SLAVE = 1 << 9, /* Make child's mount namespace MS_SLAVE */ | |
61ef3051 ZJS |
152 | FORK_PRIVATE_TMP = 1 << 10, /* Mount new /tmp/ in the child (combine with FORK_NEW_MOUNTNS!) */ |
153 | FORK_RLIMIT_NOFILE_SAFE = 1 << 11, /* Set RLIMIT_NOFILE soft limit to 1K for select() compat */ | |
154 | FORK_STDOUT_TO_STDERR = 1 << 12, /* Make stdout a copy of stderr */ | |
155 | FORK_FLUSH_STDIO = 1 << 13, /* fflush() stdout (and stderr) before forking */ | |
156 | FORK_NEW_USERNS = 1 << 14, /* Run child in its own user namespace */ | |
157 | FORK_CLOEXEC_OFF = 1 << 15, /* In the child: turn off O_CLOEXEC on all fds in except_fds[] */ | |
4c253ed1 LP |
158 | } ForkFlags; |
159 | ||
c85cb3bc | 160 | int safe_fork_full(const char *name, const int except_fds[], size_t n_except_fds, ForkFlags flags, pid_t *ret_pid); |
4c253ed1 LP |
161 | |
162 | static inline int safe_fork(const char *name, ForkFlags flags, pid_t *ret_pid) { | |
163 | return safe_fork_full(name, NULL, 0, flags, ret_pid); | |
164 | } | |
78752f2e | 165 | |
c85cb3bc | 166 | 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); |
27096982 | 167 | |
9f8168eb | 168 | int set_oom_score_adjust(int value); |
2c37c613 | 169 | int get_oom_score_adjust(int *ret); |
9f8168eb | 170 | |
f3a367d6 LP |
171 | /* The highest possibly (theoretic) pid_t value on this architecture. */ |
172 | #define PID_T_MAX ((pid_t) INT32_MAX) | |
173 | /* The maximum number of concurrent processes Linux allows on this architecture, as well as the highest valid PID value | |
174 | * the kernel will potentially assign. This reflects a value compiled into the kernel (PID_MAX_LIMIT), and sets the | |
175 | * upper boundary on what may be written to the /proc/sys/kernel/pid_max sysctl (but do note that the sysctl is off by | |
176 | * 1, since PID 0 can never exist and there can hence only be one process less than the limit would suggest). Since | |
177 | * these values are documented in proc(5) we feel quite confident that they are stable enough for the near future at | |
178 | * least to define them here too. */ | |
179 | #define TASKS_MAX 4194303U | |
f3a367d6 | 180 | |
ab1a1ba5 | 181 | assert_cc(TASKS_MAX <= (unsigned long) PID_T_MAX); |
342f6f80 | 182 | |
40c5cc2b DS |
183 | /* Like TAKE_PTR() but for pid_t, resetting them to 0 */ |
184 | #define TAKE_PID(pid) TAKE_GENERIC(pid, pid_t, 0) | |
298f466f LP |
185 | |
186 | int pidfd_get_pid(int fd, pid_t *ret); | |
f840c7d5 | 187 | int pidfd_verify_pid(int pidfd, pid_t pid); |
39090201 DJL |
188 | |
189 | int setpriority_closest(int priority); | |
2306d177 | 190 | |
8ddefb8e | 191 | _noreturn_ void freeze(void); |
6aa90884 LP |
192 | |
193 | int get_process_threads(pid_t pid); |