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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
0b452006 RC |
2 | #pragma once |
3 | ||
4 | /*** | |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2010 Lennart Poettering | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
0b452006 | 23 | #include <alloca.h> |
29ea9f0f | 24 | #include <sched.h> |
71d35b6b TA |
25 | #include <signal.h> |
26 | #include <stdbool.h> | |
11c3a366 | 27 | #include <stddef.h> |
0b452006 RC |
28 | #include <stdio.h> |
29 | #include <string.h> | |
41bf0590 | 30 | #include <sys/resource.h> |
7f452159 | 31 | #include <sys/types.h> |
0b452006 | 32 | |
f97b34a6 | 33 | #include "format-util.h" |
7f452159 | 34 | #include "ioprio.h" |
7b3e062c | 35 | #include "macro.h" |
d5641e0d | 36 | #include "time-util.h" |
0b452006 RC |
37 | |
38 | #define procfs_file_alloca(pid, field) \ | |
39 | ({ \ | |
40 | pid_t _pid_ = (pid); \ | |
41 | const char *_r_; \ | |
42 | if (_pid_ == 0) { \ | |
43 | _r_ = ("/proc/self/" field); \ | |
44 | } else { \ | |
fbd0b64f | 45 | _r_ = alloca(STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \ |
0b452006 RC |
46 | sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \ |
47 | } \ | |
48 | _r_; \ | |
49 | }) | |
50 | ||
51 | int get_process_state(pid_t pid); | |
52 | int get_process_comm(pid_t pid, char **name); | |
53 | int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line); | |
54 | int get_process_exe(pid_t pid, char **name); | |
55 | int get_process_uid(pid_t pid, uid_t *uid); | |
56 | int get_process_gid(pid_t pid, gid_t *gid); | |
57 | int get_process_capeff(pid_t pid, char **capeff); | |
58 | int get_process_cwd(pid_t pid, char **cwd); | |
59 | int get_process_root(pid_t pid, char **root); | |
60 | int get_process_environ(pid_t pid, char **environ); | |
6bc73acb | 61 | int get_process_ppid(pid_t pid, pid_t *ppid); |
0b452006 RC |
62 | |
63 | int wait_for_terminate(pid_t pid, siginfo_t *status); | |
7d4904fe LP |
64 | |
65 | typedef enum WaitFlags { | |
66 | WAIT_LOG_ABNORMAL = 1U << 0, | |
67 | WAIT_LOG_NON_ZERO_EXIT_STATUS = 1U << 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 wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags); | |
d5641e0d | 74 | int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout); |
0b452006 | 75 | |
89c9030d LP |
76 | void sigkill_wait(pid_t pid); |
77 | void sigkill_waitp(pid_t *pid); | |
4d0d3d41 | 78 | |
0b452006 | 79 | int kill_and_sigcont(pid_t pid, int sig); |
405f8907 | 80 | |
9bfaffd5 | 81 | int rename_process(const char name[]); |
0b452006 | 82 | int is_kernel_thread(pid_t pid); |
405f8907 | 83 | |
0b452006 RC |
84 | int getenv_for_pid(pid_t pid, const char *field, char **_value); |
85 | ||
86 | bool pid_is_alive(pid_t pid); | |
87 | bool pid_is_unwaited(pid_t pid); | |
1359fffa | 88 | int pid_from_same_root_fs(pid_t pid); |
d4510856 LP |
89 | |
90 | bool is_main_thread(void); | |
ceee6d3a | 91 | |
7b3e062c LP |
92 | noreturn void freeze(void); |
93 | ||
94 | bool oom_score_adjust_is_valid(int oa); | |
95 | ||
96 | #ifndef PERSONALITY_INVALID | |
97 | /* personality(7) documents that 0xffffffffUL is used for querying the | |
98 | * current personality, hence let's use that here as error | |
99 | * indicator. */ | |
100 | #define PERSONALITY_INVALID 0xffffffffLU | |
101 | #endif | |
102 | ||
103 | unsigned long personality_from_string(const char *p); | |
104 | const char *personality_to_string(unsigned long); | |
105 | ||
21022b9d | 106 | int safe_personality(unsigned long p); |
e8132d63 LP |
107 | int opinionated_personality(unsigned long *ret); |
108 | ||
7b3e062c LP |
109 | int ioprio_class_to_string_alloc(int i, char **s); |
110 | int ioprio_class_from_string(const char *s); | |
111 | ||
112 | const char *sigchld_code_to_string(int i) _const_; | |
113 | int sigchld_code_from_string(const char *s) _pure_; | |
114 | ||
115 | int sched_policy_to_string_alloc(int i, char **s); | |
116 | int sched_policy_from_string(const char *s); | |
117 | ||
ceee6d3a LP |
118 | #define PTR_TO_PID(p) ((pid_t) ((uintptr_t) p)) |
119 | #define PID_TO_PTR(p) ((void*) ((uintptr_t) p)) | |
dcadc967 EV |
120 | |
121 | void valgrind_summary_hack(void); | |
291d565a LP |
122 | |
123 | int pid_compare_func(const void *a, const void *b); | |
41bf0590 LP |
124 | |
125 | static inline bool nice_is_valid(int n) { | |
126 | return n >= PRIO_MIN && n < PRIO_MAX; | |
127 | } | |
7f452159 | 128 | |
29ea9f0f YW |
129 | static inline bool sched_policy_is_valid(int i) { |
130 | return IN_SET(i, SCHED_OTHER, SCHED_BATCH, SCHED_IDLE, SCHED_FIFO, SCHED_RR); | |
131 | } | |
132 | ||
133 | static inline bool sched_priority_is_valid(int i) { | |
134 | return i >= 0 && i <= sched_get_priority_max(SCHED_RR); | |
135 | } | |
136 | ||
7f452159 LP |
137 | static inline bool ioprio_class_is_valid(int i) { |
138 | return IN_SET(i, IOPRIO_CLASS_NONE, IOPRIO_CLASS_RT, IOPRIO_CLASS_BE, IOPRIO_CLASS_IDLE); | |
139 | } | |
140 | ||
141 | static inline bool ioprio_priority_is_valid(int i) { | |
142 | return i >= 0 && i < IOPRIO_BE_NR; | |
143 | } | |
144 | ||
54191eb3 LP |
145 | static inline bool pid_is_valid(pid_t p) { |
146 | return p > 0; | |
147 | } | |
148 | ||
33d12153 YW |
149 | static inline int sched_policy_to_string_alloc_with_check(int n, char **s) { |
150 | if (!sched_policy_is_valid(n)) | |
151 | return -EINVAL; | |
152 | ||
153 | return sched_policy_to_string_alloc(n, s); | |
154 | } | |
155 | ||
7f452159 | 156 | int ioprio_parse_priority(const char *s, int *ret); |
5c30a6d2 LP |
157 | |
158 | pid_t getpid_cached(void); | |
799a960d | 159 | void reset_cached_pid(void); |
fba868fa LP |
160 | |
161 | int must_be_root(void); | |
4c253ed1 LP |
162 | |
163 | typedef enum ForkFlags { | |
164 | FORK_RESET_SIGNALS = 1U << 0, | |
165 | FORK_CLOSE_ALL_FDS = 1U << 1, | |
166 | FORK_DEATHSIG = 1U << 2, | |
167 | FORK_NULL_STDIO = 1U << 3, | |
168 | FORK_REOPEN_LOG = 1U << 4, | |
b6e1fff1 | 169 | FORK_LOG = 1U << 5, |
1f5d1e02 | 170 | FORK_WAIT = 1U << 6, |
4c253ed1 LP |
171 | } ForkFlags; |
172 | ||
173 | int safe_fork_full(const char *name, const int except_fds[], size_t n_except_fds, ForkFlags flags, pid_t *ret_pid); | |
174 | ||
175 | static inline int safe_fork(const char *name, ForkFlags flags, pid_t *ret_pid) { | |
176 | return safe_fork_full(name, NULL, 0, flags, ret_pid); | |
177 | } | |
78752f2e LP |
178 | |
179 | int fork_agent(const char *name, const int except[], unsigned n_except, pid_t *pid, const char *path, ...); |