execute.h revision 62bca2c657bf95fd1f69935eef09915afa5c69d9
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef fooexecutehfoo
#define fooexecutehfoo
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
typedef struct ExecStatus ExecStatus;
typedef struct ExecCommand ExecCommand;
typedef struct ExecContext ExecContext;
#include <linux/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/capability.h>
#include <stdbool.h>
#include <stdio.h>
#include <sched.h>
struct CGroupBonding;
struct CGroupAttribute;
#include "list.h"
#include "util.h"
typedef enum KillMode {
KILL_CONTROL_GROUP = 0,
KILL_PROCESS,
KILL_NONE,
_KILL_MODE_MAX,
_KILL_MODE_INVALID = -1
} KillMode;
typedef enum KillWho {
KILL_MAIN,
KILL_CONTROL,
KILL_ALL,
_KILL_WHO_MAX,
_KILL_WHO_INVALID = -1
} KillWho;
typedef enum ExecInput {
EXEC_INPUT_NULL,
EXEC_INPUT_TTY,
EXEC_INPUT_TTY_FORCE,
EXEC_INPUT_TTY_FAIL,
EXEC_INPUT_SOCKET,
_EXEC_INPUT_MAX,
_EXEC_INPUT_INVALID = -1
} ExecInput;
typedef enum ExecOutput {
EXEC_OUTPUT_INHERIT,
EXEC_OUTPUT_NULL,
EXEC_OUTPUT_TTY,
EXEC_OUTPUT_SYSLOG,
EXEC_OUTPUT_SYSLOG_AND_CONSOLE,
EXEC_OUTPUT_KMSG,
EXEC_OUTPUT_KMSG_AND_CONSOLE,
EXEC_OUTPUT_JOURNAL,
EXEC_OUTPUT_JOURNAL_AND_CONSOLE,
EXEC_OUTPUT_SOCKET,
_EXEC_OUTPUT_MAX,
_EXEC_OUTPUT_INVALID = -1
} ExecOutput;
struct ExecStatus {
dual_timestamp start_timestamp;
dual_timestamp exit_timestamp;
pid_t pid;
int code; /* as in siginfo_t::si_code */
int status; /* as in sigingo_t::si_status */
};
struct ExecCommand {
char *path;
char **argv;
ExecStatus exec_status;
LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */
bool ignore;
};
struct ExecContext {
char **environment;
char **environment_files;
struct rlimit *rlimit[RLIMIT_NLIMITS];
char *working_directory, *root_directory;
mode_t umask;
int oom_score_adjust;
int nice;
int ioprio;
int cpu_sched_policy;
int cpu_sched_priority;
cpu_set_t *cpuset;
unsigned cpuset_ncpus;
ExecInput std_input;
ExecOutput std_output;
ExecOutput std_error;
nsec_t timer_slack_nsec;
char *tcpwrap_name;
char *tty_path;
bool tty_reset;
bool tty_vhangup;
bool tty_vt_disallocate;
bool ignore_sigpipe;
/* Since resolving these names might might involve socket
* connections and we don't want to deadlock ourselves these
* names are resolved on execution only and in the child
* process. */
char *user;
char *group;
char **supplementary_groups;
char *pam_name;
char *utmp_id;
char **read_write_dirs, **read_only_dirs, **inaccessible_dirs;
unsigned long mount_flags;
uint64_t capability_bounding_set_drop;
/* Not relevant for spawning processes, just for killing */
KillMode kill_mode;
int kill_signal;
bool send_sigkill;
cap_t capabilities;
int secure_bits;
int syslog_priority;
char *syslog_identifier;
bool syslog_level_prefix;
bool cpu_sched_reset_on_fork;
bool non_blocking;
bool private_tmp;
bool private_network;
bool control_group_modify;
int control_group_persistent;
/* This is not exposed to the user but available
* internally. We need it to make sure that whenever we spawn
* /bin/mount it is run in the same process group as us so
* that the autofs logic detects that it belongs to us and we
* don't enter a trigger loop. */
bool same_pgrp;
bool oom_score_adjust_set:1;
bool nice_set:1;
bool ioprio_set:1;
bool cpu_sched_set:1;
};
int exec_spawn(ExecCommand *command,
char **argv,
const ExecContext *context,
int fds[], unsigned n_fds,
char **environment,
bool apply_permissions,
bool apply_chroot,
bool apply_tty_stdin,
bool confirm_spawn,
struct CGroupBonding *cgroup_bondings,
struct CGroupAttribute *cgroup_attributes,
const char *cgroup_suffix,
const char *unit_id,
int pipe_fd[2],
pid_t *ret);
void exec_command_done(ExecCommand *c);
void exec_command_done_array(ExecCommand *c, unsigned n);
void exec_command_free_list(ExecCommand *c);
void exec_command_free_array(ExecCommand **c, unsigned n);
char *exec_command_line(char **argv);
void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix);
void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix);
void exec_command_append_list(ExecCommand **l, ExecCommand *e);
int exec_command_set(ExecCommand *c, const char *path, ...);
void exec_context_init(ExecContext *c);
void exec_context_done(ExecContext *c);
void exec_context_dump(ExecContext *c, FILE* f, const char *prefix);
void exec_context_tty_reset(const ExecContext *context);
int exec_context_load_environment(const ExecContext *c, char ***l);
void exec_status_start(ExecStatus *s, pid_t pid);
void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status);
void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix);
const char* exec_output_to_string(ExecOutput i);
ExecOutput exec_output_from_string(const char *s);
const char* exec_input_to_string(ExecInput i);
ExecInput exec_input_from_string(const char *s);
const char *kill_mode_to_string(KillMode k);
KillMode kill_mode_from_string(const char *s);
const char *kill_who_to_string(KillWho k);
KillWho kill_who_from_string(const char *s);
#endif