1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2010 Lennart Poettering
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.
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.
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/>.
30 #include <sys/resource.h>
31 #include <sys/types.h>
33 #include "format-util.h"
36 //#include "time-util.h"
38 #define procfs_file_alloca(pid, field) \
40 pid_t _pid_ = (pid); \
43 _r_ = ("/proc/self/" field); \
45 _r_ = alloca(STRLEN("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
46 sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_); \
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 #if 0 /// UNNEEDED by elogind
56 int get_process_uid(pid_t pid, uid_t *uid);
57 int get_process_gid(pid_t pid, gid_t *gid);
58 int get_process_capeff(pid_t pid, char **capeff);
59 int get_process_cwd(pid_t pid, char **cwd);
60 int get_process_root(pid_t pid, char **root);
61 int get_process_environ(pid_t pid, char **environ);
62 int get_process_ppid(pid_t pid, pid_t *ppid);
65 int wait_for_terminate(pid_t pid, siginfo_t *status);
67 typedef enum WaitFlags {
68 WAIT_LOG_ABNORMAL = 1U << 0,
69 WAIT_LOG_NON_ZERO_EXIT_STATUS = 1U << 1,
71 /* A shortcut for requesting the most complete logging */
72 WAIT_LOG = WAIT_LOG_ABNORMAL|WAIT_LOG_NON_ZERO_EXIT_STATUS,
75 int wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags);
76 int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout);
77 #if 0 /// UNNEEDED by elogind
79 void sigkill_wait(pid_t pid);
80 void sigkill_waitp(pid_t *pid);
82 int kill_and_sigcont(pid_t pid, int sig);
84 int rename_process(const char name[]);
86 int is_kernel_thread(pid_t pid);
88 int getenv_for_pid(pid_t pid, const char *field, char **_value);
90 bool pid_is_alive(pid_t pid);
91 bool pid_is_unwaited(pid_t pid);
92 #if 0 /// UNNEEDED by elogind
93 int pid_from_same_root_fs(pid_t pid);
96 bool is_main_thread(void);
98 #if 0 /// UNNEEDED by elogind
99 noreturn void freeze(void);
101 bool oom_score_adjust_is_valid(int oa);
104 #ifndef PERSONALITY_INVALID
105 /* personality(7) documents that 0xffffffffUL is used for querying the
106 * current personality, hence let's use that here as error
108 #define PERSONALITY_INVALID 0xffffffffLU
111 #if 0 /// UNNEEDED by elogind
112 unsigned long personality_from_string(const char *p);
113 const char *personality_to_string(unsigned long);
115 int safe_personality(unsigned long p);
116 int opinionated_personality(unsigned long *ret);
118 int ioprio_class_to_string_alloc(int i, char **s);
119 int ioprio_class_from_string(const char *s);
121 const char *sigchld_code_to_string(int i) _const_;
122 int sigchld_code_from_string(const char *s) _pure_;
124 int sched_policy_to_string_alloc(int i, char **s);
125 int sched_policy_from_string(const char *s);
128 #define PTR_TO_PID(p) ((pid_t) ((uintptr_t) p))
129 #define PID_TO_PTR(p) ((void*) ((uintptr_t) p))
131 void valgrind_summary_hack(void);
133 int pid_compare_func(const void *a, const void *b);
135 #if 0 /// UNNEEDED by elogind
136 static inline bool nice_is_valid(int n) {
137 return n >= PRIO_MIN && n < PRIO_MAX;
140 static inline bool sched_policy_is_valid(int i) {
141 return IN_SET(i, SCHED_OTHER, SCHED_BATCH, SCHED_IDLE, SCHED_FIFO, SCHED_RR);
144 static inline bool sched_priority_is_valid(int i) {
145 return i >= 0 && i <= sched_get_priority_max(SCHED_RR);
148 static inline bool ioprio_class_is_valid(int i) {
149 return IN_SET(i, IOPRIO_CLASS_NONE, IOPRIO_CLASS_RT, IOPRIO_CLASS_BE, IOPRIO_CLASS_IDLE);
152 static inline bool ioprio_priority_is_valid(int i) {
153 return i >= 0 && i < IOPRIO_BE_NR;
157 static inline bool pid_is_valid(pid_t p) {
161 static inline int sched_policy_to_string_alloc_with_check(int n, char **s) {
162 if (!sched_policy_is_valid(n))
165 return sched_policy_to_string_alloc(n, s);
168 #if 0 /// UNNEEDED by elogind
169 int ioprio_parse_priority(const char *s, int *ret);
172 pid_t getpid_cached(void);
173 void reset_cached_pid(void);
175 int must_be_root(void);
177 typedef enum ForkFlags {
178 FORK_RESET_SIGNALS = 1U << 0,
179 FORK_CLOSE_ALL_FDS = 1U << 1,
180 FORK_DEATHSIG = 1U << 2,
181 FORK_NULL_STDIO = 1U << 3,
182 FORK_REOPEN_LOG = 1U << 4,
187 int safe_fork_full(const char *name, const int except_fds[], size_t n_except_fds, ForkFlags flags, pid_t *ret_pid);
189 static inline int safe_fork(const char *name, ForkFlags flags, pid_t *ret_pid) {
190 return safe_fork_full(name, NULL, 0, flags, ret_pid);
193 int fork_agent(const char *name, const int except[], unsigned n_except, pid_t *pid, const char *path, ...);