xref: /third_party/eudev/src/shared/process-util.h (revision 99ca880a)
1#pragma once
2
3/***
4  This file is part of systemd.
5
6  Copyright 2010 Lennart Poettering
7
8  systemd is free software; you can redistribute it and/or modify it
9  under the terms of the GNU Lesser General Public License as published by
10  the Free Software Foundation; either version 2.1 of the License, or
11  (at your option) any later version.
12
13  systemd is distributed in the hope that it will be useful, but
14  WITHOUT ANY WARRANTY; without even the implied warranty of
15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  Lesser General Public License for more details.
17
18  You should have received a copy of the GNU Lesser General Public License
19  along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
22#include <stdbool.h>
23#include <sys/types.h>
24#include <alloca.h>
25#include <stdio.h>
26#include <string.h>
27#include <signal.h>
28
29#include "formats-util.h"
30
31#define procfs_file_alloca(pid, field)                                  \
32        ({                                                              \
33                pid_t _pid_ = (pid);                                    \
34                const char *_r_;                                        \
35                if (_pid_ == 0) {                                       \
36                        _r_ = ("/proc/self/" field);                    \
37                } else {                                                \
38                        _r_ = alloca(strlen("/proc/") + DECIMAL_STR_MAX(pid_t) + 1 + sizeof(field)); \
39                        sprintf((char*) _r_, "/proc/"PID_FMT"/" field, _pid_);                       \
40                }                                                       \
41                _r_;                                                    \
42        })
43
44int get_process_comm(pid_t pid, char **name);
45int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line);
46int get_process_environ(pid_t pid, char **environ);
47