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Diffstat (limited to 'src/execute.h')
| -rw-r--r-- | src/execute.h | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/execute.h b/src/execute.h new file mode 100644 index 000000000..be73542d4 --- /dev/null +++ b/src/execute.h @@ -0,0 +1,221 @@ +/*-*- Mode: C; c-basic-offset: 8 -*-*/ + +#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 General Public License as published by + the Free Software Foundation; either version 2 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 + General Public License for more details. + + You should have received a copy of the GNU 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 <sys/time.h> +#include <sys/resource.h> +#include <sys/capability.h> +#include <stdbool.h> +#include <stdio.h> +#include <sched.h> + +struct CGroupBonding; + +#include "list.h" +#include "util.h" + +/* Abstract namespace! */ +#define LOGGER_SOCKET "/org/freedesktop/systemd1/logger" + +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_KERNEL, + EXEC_OUTPUT_SOCKET, + _EXEC_OUTPUT_MAX, + _EXEC_OUTPUT_INVALID = -1 +} ExecOutput; + +struct ExecStatus { + usec_t start_timestamp; + usec_t 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 */ +}; + +struct ExecContext { + char **environment; + struct rlimit *rlimit[RLIMIT_NLIMITS]; + char *working_directory, *root_directory; + + mode_t umask; + int oom_adjust; + int nice; + int ioprio; + int cpu_sched_policy; + int cpu_sched_priority; + + cpu_set_t cpu_affinity; + unsigned long timer_slack_ns; + + ExecInput std_input; + ExecOutput std_output; + ExecOutput std_error; + + int syslog_priority; + char *syslog_identifier; + bool syslog_no_prefix; + + char *tty_path; + + /* 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 **read_write_dirs, **read_only_dirs, **inaccessible_dirs; + unsigned long mount_flags; + + uint64_t capability_bounding_set_drop; + + cap_t capabilities; + int secure_bits; + + bool cpu_sched_reset_on_fork; + bool non_blocking; + bool private_tmp; + + bool oom_adjust_set:1; + bool nice_set:1; + bool ioprio_set:1; + bool cpu_sched_set:1; + bool cpu_affinity_set:1; + bool timer_slack_ns_set:1; + + /* 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 no_setsid:1; +}; + +typedef enum ExitStatus { + /* EXIT_SUCCESS defined by libc */ + /* EXIT_FAILURE defined by libc */ + EXIT_INVALIDARGUMENT = 2, + EXIT_NOTIMPLEMENTED = 3, + EXIT_NOPERMISSION = 4, + EXIT_NOTINSTALLED = 5, + EXIT_NOTCONFIGURED = 6, + EXIT_NOTRUNNING = 7, + + /* The LSB suggests that error codes >= 200 are "reserved". We + * use them here under the assumption that they hence are + * unused by init scripts. + * + * http://refspecs.freestandards.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html */ + + EXIT_CHDIR = 200, + EXIT_NICE, + EXIT_FDS, + EXIT_EXEC, + EXIT_MEMORY, + EXIT_LIMITS, + EXIT_OOM_ADJUST, + EXIT_SIGNAL_MASK, + EXIT_STDIN, + EXIT_STDOUT, + EXIT_CHROOT, /* 210 */ + EXIT_IOPRIO, + EXIT_TIMERSLACK, + EXIT_SECUREBITS, + EXIT_SETSCHEDULER, + EXIT_CPUAFFINITY, + EXIT_GROUP, + EXIT_USER, + EXIT_CAPABILITIES, + EXIT_CGROUP, + EXIT_SETSID, /* 220 */ + EXIT_CONFIRM, + EXIT_STDERR + +} ExitStatus; + +int exec_spawn(ExecCommand *command, + char **argv, + const ExecContext *context, + int fds[], unsigned n_fds, + char **environment, + bool apply_permissions, + bool apply_chroot, + bool confirm_spawn, + struct CGroupBonding *cgroup_bondings, + 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_status_fill(ExecStatus *s, 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); +int exec_output_from_string(const char *s); + +const char* exec_input_to_string(ExecInput i); +int exec_input_from_string(const char *s); + +const char* exit_status_to_string(ExitStatus status); + +#endif |