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7f8aa67131
tcpwrap is legacy code, that is barely maintained upstream. It's APIs are awful, and the feature set it exposes (such as DNS and IDENT access control) questionnable. We should not support this natively in systemd. Hence, let's remove the code. If people want to continue making use of this, they can do so by plugging in "tcpd" for the processes they start. With that scheme things are as well or badly supported as they were from traditional inetd, hence no functionality is really lost.
250 lines
7.0 KiB
C
250 lines
7.0 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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typedef struct ExecStatus ExecStatus;
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typedef struct ExecCommand ExecCommand;
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typedef struct ExecContext ExecContext;
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typedef struct ExecRuntime ExecRuntime;
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#include <linux/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/capability.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <sched.h>
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#include "list.h"
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#include "util.h"
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#include "set.h"
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#include "fdset.h"
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#include "missing.h"
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typedef enum ExecInput {
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EXEC_INPUT_NULL,
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EXEC_INPUT_TTY,
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EXEC_INPUT_TTY_FORCE,
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EXEC_INPUT_TTY_FAIL,
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EXEC_INPUT_SOCKET,
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_EXEC_INPUT_MAX,
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_EXEC_INPUT_INVALID = -1
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} ExecInput;
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typedef enum ExecOutput {
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EXEC_OUTPUT_INHERIT,
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EXEC_OUTPUT_NULL,
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EXEC_OUTPUT_TTY,
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EXEC_OUTPUT_SYSLOG,
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EXEC_OUTPUT_SYSLOG_AND_CONSOLE,
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EXEC_OUTPUT_KMSG,
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EXEC_OUTPUT_KMSG_AND_CONSOLE,
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EXEC_OUTPUT_JOURNAL,
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EXEC_OUTPUT_JOURNAL_AND_CONSOLE,
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EXEC_OUTPUT_SOCKET,
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_EXEC_OUTPUT_MAX,
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_EXEC_OUTPUT_INVALID = -1
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} ExecOutput;
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struct ExecStatus {
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dual_timestamp start_timestamp;
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dual_timestamp exit_timestamp;
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pid_t pid;
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int code; /* as in siginfo_t::si_code */
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int status; /* as in sigingo_t::si_status */
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};
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struct ExecCommand {
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char *path;
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char **argv;
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ExecStatus exec_status;
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LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */
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bool ignore;
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};
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struct ExecRuntime {
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int n_ref;
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char *tmp_dir;
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char *var_tmp_dir;
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int netns_storage_socket[2];
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};
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struct ExecContext {
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char **environment;
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char **environment_files;
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struct rlimit *rlimit[_RLIMIT_MAX];
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char *working_directory, *root_directory;
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mode_t umask;
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int oom_score_adjust;
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int nice;
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int ioprio;
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int cpu_sched_policy;
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int cpu_sched_priority;
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cpu_set_t *cpuset;
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unsigned cpuset_ncpus;
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ExecInput std_input;
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ExecOutput std_output;
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ExecOutput std_error;
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nsec_t timer_slack_nsec;
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char *tty_path;
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bool tty_reset;
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bool tty_vhangup;
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bool tty_vt_disallocate;
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bool ignore_sigpipe;
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/* Since resolving these names might might involve socket
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* connections and we don't want to deadlock ourselves these
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* names are resolved on execution only and in the child
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* process. */
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char *user;
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char *group;
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char **supplementary_groups;
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char *pam_name;
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char *utmp_id;
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bool selinux_context_ignore;
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char *selinux_context;
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bool apparmor_profile_ignore;
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char *apparmor_profile;
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char **read_write_dirs, **read_only_dirs, **inaccessible_dirs;
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unsigned long mount_flags;
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uint64_t capability_bounding_set_drop;
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cap_t capabilities;
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int secure_bits;
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int syslog_priority;
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char *syslog_identifier;
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bool syslog_level_prefix;
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bool cpu_sched_reset_on_fork;
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bool non_blocking;
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bool private_tmp;
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bool private_network;
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bool private_devices;
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bool no_new_privileges;
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/* This is not exposed to the user but available
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* internally. We need it to make sure that whenever we spawn
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* /bin/mount it is run in the same process group as us so
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* that the autofs logic detects that it belongs to us and we
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* don't enter a trigger loop. */
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bool same_pgrp;
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unsigned long personality;
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Set *syscall_filter;
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Set *syscall_archs;
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int syscall_errno;
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bool syscall_whitelist:1;
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Set *address_families;
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bool address_families_whitelist:1;
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char **runtime_directory;
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mode_t runtime_directory_mode;
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bool oom_score_adjust_set:1;
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bool nice_set:1;
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bool ioprio_set:1;
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bool cpu_sched_set:1;
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bool no_new_privileges_set:1;
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};
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#include "cgroup.h"
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int exec_spawn(ExecCommand *command,
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char **argv,
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ExecContext *context,
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int fds[], unsigned n_fds,
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char **environment,
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bool apply_permissions,
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bool apply_chroot,
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bool apply_tty_stdin,
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bool confirm_spawn,
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CGroupControllerMask cgroup_mask,
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const char *cgroup_path,
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const char *runtime_prefix,
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const char *unit_id,
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usec_t watchdog_usec,
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int pipe_fd[2],
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ExecRuntime *runtime,
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pid_t *ret);
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void exec_command_done(ExecCommand *c);
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void exec_command_done_array(ExecCommand *c, unsigned n);
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void exec_command_free_list(ExecCommand *c);
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void exec_command_free_array(ExecCommand **c, unsigned n);
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char *exec_command_line(char **argv);
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void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix);
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void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix);
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void exec_command_append_list(ExecCommand **l, ExecCommand *e);
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int exec_command_set(ExecCommand *c, const char *path, ...);
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void exec_context_init(ExecContext *c);
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void exec_context_done(ExecContext *c);
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void exec_context_dump(ExecContext *c, FILE* f, const char *prefix);
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int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_root);
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int exec_context_load_environment(const ExecContext *c, char ***l);
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bool exec_context_may_touch_console(ExecContext *c);
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void exec_status_start(ExecStatus *s, pid_t pid);
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void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status);
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void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix);
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int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id);
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ExecRuntime *exec_runtime_ref(ExecRuntime *r);
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ExecRuntime *exec_runtime_unref(ExecRuntime *r);
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int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds);
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int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds);
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void exec_runtime_destroy(ExecRuntime *rt);
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const char* exec_output_to_string(ExecOutput i) _const_;
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ExecOutput exec_output_from_string(const char *s) _pure_;
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const char* exec_input_to_string(ExecInput i) _const_;
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ExecInput exec_input_from_string(const char *s) _pure_;
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