-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
#include <pwd.h>
#include <sys/mount.h>
#include <linux/fs.h>
+#include <linux/oom.h>
#ifdef HAVE_PAM
#include <security/pam_appl.h>
#include "cgroup.h"
#include "namespace.h"
#include "tcpwrap.h"
+#include "exit-status.h"
+#include "missing.h"
+#include "utmp-wtmp.h"
+#include "def.h"
+#include "loopback-setup.h"
/* This assumes there is a 'tty' group */
#define TTY_MODE 0620
return "/dev/console";
}
+void exec_context_tty_reset(const ExecContext *context) {
+ assert(context);
+
+ if (context->tty_vhangup)
+ terminal_vhangup(tty_path(context));
+
+ if (context->tty_reset)
+ reset_terminal(tty_path(context));
+
+ if (context->tty_vt_disallocate && context->tty_path)
+ vt_disallocate(context->tty_path);
+}
+
static int open_null_as(int flags, int nfd) {
int fd, r;
zero(sa);
sa.sa.sa_family = AF_UNIX;
- strncpy(sa.un.sun_path+1, LOGGER_SOCKET, sizeof(sa.un.sun_path)-1);
+ strncpy(sa.un.sun_path, STDOUT_SYSLOG_BRIDGE_SOCKET, sizeof(sa.un.sun_path));
- if (connect(fd, &sa.sa, sizeof(sa_family_t) + 1 + sizeof(LOGGER_SOCKET) - 1) < 0) {
+ if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + sizeof(STDOUT_SYSLOG_BRIDGE_SOCKET) - 1) < 0) {
close_nointr_nofail(fd);
return -errno;
}
"%i\n"
"%s\n"
"%i\n",
- output == EXEC_OUTPUT_KMSG ? "kmsg" : "syslog",
+ output == EXEC_OUTPUT_KMSG ? "kmsg" :
+ output == EXEC_OUTPUT_KMSG_AND_CONSOLE ? "kmsg+console" :
+ output == EXEC_OUTPUT_SYSLOG ? "syslog" :
+ "syslog+console",
context->syslog_priority,
context->syslog_identifier ? context->syslog_identifier : ident,
context->syslog_level_prefix);
return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
case EXEC_OUTPUT_SYSLOG:
+ case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
case EXEC_OUTPUT_KMSG:
+ case EXEC_OUTPUT_KMSG_AND_CONSOLE:
return connect_logger_as(context, o, ident, STDOUT_FILENO);
case EXEC_OUTPUT_SOCKET:
return open_terminal_as(tty_path(context), O_WRONLY, STDERR_FILENO);
case EXEC_OUTPUT_SYSLOG:
+ case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
case EXEC_OUTPUT_KMSG:
+ case EXEC_OUTPUT_KMSG_AND_CONSOLE:
return connect_logger_as(context, e, ident, STDERR_FILENO);
case EXEC_OUTPUT_SOCKET:
return 0;
}
-static int get_group_creds(const char *groupname, gid_t *gid) {
- struct group *g;
- unsigned long lu;
-
- assert(groupname);
- assert(gid);
-
- /* We enforce some special rules for gid=0: in order to avoid
- * NSS lookups for root we hardcode its data. */
-
- if (streq(groupname, "root") || streq(groupname, "0")) {
- *gid = 0;
- return 0;
- }
-
- if (safe_atolu(groupname, &lu) >= 0) {
- errno = 0;
- g = getgrgid((gid_t) lu);
- } else {
- errno = 0;
- g = getgrnam(groupname);
- }
-
- if (!g)
- return errno != 0 ? -errno : -ESRCH;
-
- *gid = g->gr_gid;
- return 0;
-}
-
-static int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) {
- struct passwd *p;
- unsigned long lu;
-
- assert(username);
- assert(*username);
- assert(uid);
- assert(gid);
- assert(home);
-
- /* We enforce some special rules for uid=0: in order to avoid
- * NSS lookups for root we hardcode its data. */
-
- if (streq(*username, "root") || streq(*username, "0")) {
- *username = "root";
- *uid = 0;
- *gid = 0;
- *home = "/root";
- return 0;
- }
-
- if (safe_atolu(*username, &lu) >= 0) {
- errno = 0;
- p = getpwuid((uid_t) lu);
-
- /* If there are multiple users with the same id, make
- * sure to leave $USER to the configured value instead
- * of the first occurence in the database. However if
- * the uid was configured by a numeric uid, then let's
- * pick the real username from /etc/passwd. */
- if (*username && p)
- *username = p->pw_name;
- } else {
- errno = 0;
- p = getpwnam(*username);
- }
-
- if (!p)
- return errno != 0 ? -errno : -ESRCH;
-
- *uid = p->pw_uid;
- *gid = p->pw_gid;
- *home = p->pw_dir;
- return 0;
-}
-
static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) {
bool keep_groups = false;
int r;
assert(context);
- /* Lookup and ser GID and supplementary group list. Here too
+ /* Lookup and set GID and supplementary group list. Here too
* we avoid NSS lookups for gid=0. */
if (context->group || username) {
- if (context->group)
- if ((r = get_group_creds(context->group, &gid)) < 0)
+ if (context->group) {
+ const char *g = context->group;
+
+ if ((r = get_group_creds(&g, &gid)) < 0)
return r;
+ }
/* First step, initialize groups from /etc/groups */
if (username && gid != 0) {
char **i;
/* Final step, initialize any manually set supplementary groups */
- ngroups_max = (int) sysconf(_SC_NGROUPS_MAX);
+ assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0);
if (!(gids = new(gid_t, ngroups_max)))
return -ENOMEM;
k = 0;
STRV_FOREACH(i, context->supplementary_groups) {
+ const char *g;
if (k >= ngroups_max) {
free(gids);
return -E2BIG;
}
- if ((r = get_group_creds(*i, gids+k)) < 0) {
+ g = *i;
+ r = get_group_creds(&g, gids+k);
+ if (r < 0) {
free(gids);
return r;
}
/* First step: If we need to keep capabilities but
* drop privileges we need to make sure we keep our
- * caps, whiel we drop priviliges. */
+ * caps, whiel we drop privileges. */
if (uid != 0) {
int sb = context->secure_bits|SECURE_KEEP_CAPS;
return -errno;
}
- /* Second step: set the capabilites. This will reduce
+ /* Second step: set the capabilities. This will reduce
* the capabilities to the minimum we need. */
if (!(d = cap_dup(context->capabilities)))
pam_handle_t *handle = NULL;
sigset_t ss, old_ss;
int pam_code = PAM_SUCCESS;
+ int err;
char **e = NULL;
bool close_session = false;
pid_t pam_pid = 0, parent_pid;
assert(pam_env);
/* We set up PAM in the parent process, then fork. The child
- * will then stay around untill killed via PR_GET_PDEATHSIG or
+ * will then stay around until killed via PR_GET_PDEATHSIG or
* systemd via the cgroup logic. It will then remove the PAM
* session again. The parent process will exec() the actual
* daemon. We do things this way to ensure that the main PID
close_session = true;
- if ((pam_code = pam_setcred(handle, PAM_ESTABLISH_CRED | PAM_SILENT)) != PAM_SUCCESS)
- goto fail;
-
if ((!(e = pam_getenvlist(handle)))) {
pam_code = PAM_BUF_ERR;
goto fail;
/* This string must fit in 10 chars (i.e. the length
* of "/sbin/init") */
- rename_process("sd:pam");
+ rename_process("sd(PAM)");
/* Make sure we don't keep open the passed fds in this
child. We assume that otherwise only those fds are
/* Wait until our parent died. This will most likely
* not work since the kernel does not allow
- * unpriviliged paretns kill their priviliged children
+ * unprivileged parents kill their privileged children
* this way. We rely on the control groups kill logic
* to do the rest for us. */
if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
/* Check if our parent process might already have
* died? */
if (getppid() == parent_pid) {
- if (sigwait(&ss, &sig) < 0)
- goto child_finish;
+ for (;;) {
+ if (sigwait(&ss, &sig) < 0) {
+ if (errno == EINTR)
+ continue;
+
+ goto child_finish;
+ }
- assert(sig == SIGTERM);
+ assert(sig == SIGTERM);
+ break;
+ }
}
- /* Only if our parent died we'll end the session */
+ /* If our parent died we'll end the session */
if (getppid() != parent_pid)
if ((pam_code = pam_close_session(handle, PAM_DATA_SILENT)) != PAM_SUCCESS)
goto child_finish;
* cleanups, so forget about the handle here. */
handle = NULL;
- /* Unblock SIGSUR1 again in the parent */
+ /* Unblock SIGTERM again in the parent */
if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0)
goto fail;
* might have opened it, but we don't want this fd around. */
closelog();
+ *pam_env = e;
+ e = NULL;
+
return 0;
fail:
+ if (pam_code != PAM_SUCCESS)
+ err = -EPERM; /* PAM errors do not map to errno */
+ else
+ err = -errno;
+
if (handle) {
if (close_session)
pam_code = pam_close_session(handle, PAM_DATA_SILENT);
closelog();
- if (pam_pid > 1)
+ if (pam_pid > 1) {
kill(pam_pid, SIGTERM);
+ kill(pam_pid, SIGCONT);
+ }
- return EXIT_PAM;
+ return err;
}
#endif
+static int do_capability_bounding_set_drop(uint64_t drop) {
+ unsigned long i;
+ cap_t old_cap = NULL, new_cap = NULL;
+ cap_flag_value_t fv;
+ int r;
+
+ /* If we are run as PID 1 we will lack CAP_SETPCAP by default
+ * in the effective set (yes, the kernel drops that when
+ * executing init!), so get it back temporarily so that we can
+ * call PR_CAPBSET_DROP. */
+
+ old_cap = cap_get_proc();
+ if (!old_cap)
+ return -errno;
+
+ if (cap_get_flag(old_cap, CAP_SETPCAP, CAP_EFFECTIVE, &fv) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (fv != CAP_SET) {
+ static const cap_value_t v = CAP_SETPCAP;
+
+ new_cap = cap_dup(old_cap);
+ if (!new_cap) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (cap_set_flag(new_cap, CAP_EFFECTIVE, 1, &v, CAP_SET) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ if (cap_set_proc(new_cap) < 0) {
+ r = -errno;
+ goto finish;
+ }
+ }
+
+ for (i = 0; i <= cap_last_cap(); i++)
+ if (drop & ((uint64_t) 1ULL << (uint64_t) i)) {
+ if (prctl(PR_CAPBSET_DROP, i) < 0) {
+ r = -errno;
+ goto finish;
+ }
+ }
+
+ r = 0;
+
+finish:
+ if (new_cap)
+ cap_free(new_cap);
+
+ if (old_cap) {
+ cap_set_proc(old_cap);
+ cap_free(old_cap);
+ }
+
+ return r;
+}
+
int exec_spawn(ExecCommand *command,
char **argv,
const ExecContext *context,
bool apply_tty_stdin,
bool confirm_spawn,
CGroupBonding *cgroup_bondings,
+ CGroupAttribute *cgroup_attributes,
pid_t *ret) {
pid_t pid;
int r;
char *line;
int socket_fd;
+ char **files_env = NULL;
assert(command);
assert(context);
} else
socket_fd = -1;
+ if ((r = exec_context_load_environment(context, &files_env)) < 0) {
+ log_error("Failed to load environment files: %s", strerror(-r));
+ return r;
+ }
+
if (!argv)
argv = command->argv;
- if (!(line = exec_command_line(argv)))
- return -ENOMEM;
+ if (!(line = exec_command_line(argv))) {
+ r = -ENOMEM;
+ goto fail_parent;
+ }
log_debug("About to execute: %s", line);
free(line);
- if (cgroup_bondings)
- if ((r = cgroup_bonding_realize_list(cgroup_bondings)))
- return r;
+ r = cgroup_bonding_realize_list(cgroup_bondings);
+ if (r < 0)
+ goto fail_parent;
- if ((pid = fork()) < 0)
- return -errno;
+ cgroup_attribute_apply_list(cgroup_attributes, cgroup_bondings);
+
+ if ((pid = fork()) < 0) {
+ r = -errno;
+ goto fail_parent;
+ }
if (pid == 0) {
- int i;
+ int i, err;
sigset_t ss;
const char *username = NULL, *home = NULL;
uid_t uid = (uid_t) -1;
/* This string must fit in 10 chars (i.e. the length
* of "/sbin/init") */
- rename_process("sd:exec");
+ rename_process("sd(EXEC)");
/* We reset exactly these signals, since they are the
* only ones we set to SIG_IGN in the main daemon. All
if (sigemptyset(&ss) < 0 ||
sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
+ err = -errno;
r = EXIT_SIGNAL_MASK;
- goto fail;
+ goto fail_child;
}
/* Close sockets very early to make sure we don't
* block init reexecution because it cannot bind its
* sockets */
- if (close_all_fds(fds, n_fds) < 0) {
+ log_forget_fds();
+ err = close_all_fds(socket_fd >= 0 ? &socket_fd : fds,
+ socket_fd >= 0 ? 1 : n_fds);
+ if (err < 0) {
r = EXIT_FDS;
- goto fail;
+ goto fail_child;
}
if (!context->same_pgrp)
if (setsid() < 0) {
+ err = -errno;
r = EXIT_SETSID;
- goto fail;
+ goto fail_child;
}
if (context->tcpwrap_name) {
if (socket_fd >= 0)
if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
+ err = -EACCES;
r = EXIT_TCPWRAP;
- goto fail;
+ goto fail_child;
}
for (i = 0; i < (int) n_fds; i++) {
if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) {
+ err = -EACCES;
r = EXIT_TCPWRAP;
- goto fail;
+ goto fail_child;
}
}
}
+ exec_context_tty_reset(context);
+
/* We skip the confirmation step if we shall not apply the TTY */
if (confirm_spawn &&
(!is_terminal_input(context->std_input) || apply_tty_stdin)) {
/* Set up terminal for the question */
if ((r = setup_confirm_stdio(context,
- &saved_stdin, &saved_stdout)))
- goto fail;
+ &saved_stdin, &saved_stdout))) {
+ err = -errno;
+ goto fail_child;
+ }
/* Now ask the question. */
if (!(line = exec_command_line(argv))) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
free(line);
if (r < 0 || response == 'n') {
+ err = -ECANCELED;
r = EXIT_CONFIRM;
- goto fail;
+ goto fail_child;
} else if (response == 's') {
- r = 0;
- goto fail;
+ err = r = 0;
+ goto fail_child;
}
/* Release terminal for the question */
if ((r = restore_confirm_stdio(context,
&saved_stdin, &saved_stdout,
- &keep_stdin, &keep_stdout)))
- goto fail;
+ &keep_stdin, &keep_stdout))) {
+ err = -errno;
+ goto fail_child;
+ }
}
- if (!keep_stdin)
- if (setup_input(context, socket_fd, apply_tty_stdin) < 0) {
+ /* If a socket is connected to STDIN/STDOUT/STDERR, we
+ * must sure to drop O_NONBLOCK */
+ if (socket_fd >= 0)
+ fd_nonblock(socket_fd, false);
+
+ if (!keep_stdin) {
+ err = setup_input(context, socket_fd, apply_tty_stdin);
+ if (err < 0) {
r = EXIT_STDIN;
- goto fail;
+ goto fail_child;
}
+ }
- if (!keep_stdout)
- if (setup_output(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
+ if (!keep_stdout) {
+ err = setup_output(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin);
+ if (err < 0) {
r = EXIT_STDOUT;
- goto fail;
+ goto fail_child;
}
+ }
- if (setup_error(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin) < 0) {
+ err = setup_error(context, socket_fd, file_name_from_path(command->path), apply_tty_stdin);
+ if (err < 0) {
r = EXIT_STDERR;
- goto fail;
+ goto fail_child;
}
- if (cgroup_bondings)
- if ((r = cgroup_bonding_install_list(cgroup_bondings, 0)) < 0) {
+ if (cgroup_bondings) {
+ err = cgroup_bonding_install_list(cgroup_bondings, 0);
+ if (err < 0) {
r = EXIT_CGROUP;
- goto fail;
+ goto fail_child;
}
+ }
- if (context->oom_adjust_set) {
+ if (context->oom_score_adjust_set) {
char t[16];
- snprintf(t, sizeof(t), "%i", context->oom_adjust);
+ snprintf(t, sizeof(t), "%i", context->oom_score_adjust);
char_array_0(t);
- if (write_one_line_file("/proc/self/oom_adj", t) < 0) {
- r = EXIT_OOM_ADJUST;
- goto fail;
+ if (write_one_line_file("/proc/self/oom_score_adj", t) < 0) {
+ /* Compatibility with Linux <= 2.6.35 */
+
+ int adj;
+
+ adj = (context->oom_score_adjust * -OOM_DISABLE) / OOM_SCORE_ADJ_MAX;
+ adj = CLAMP(adj, OOM_DISABLE, OOM_ADJUST_MAX);
+
+ snprintf(t, sizeof(t), "%i", adj);
+ char_array_0(t);
+
+ if (write_one_line_file("/proc/self/oom_adj", t) < 0
+ && errno != EACCES) {
+ err = -errno;
+ r = EXIT_OOM_ADJUST;
+ goto fail_child;
+ }
}
}
if (context->nice_set)
if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
+ err = -errno;
r = EXIT_NICE;
- goto fail;
+ goto fail_child;
}
if (context->cpu_sched_set) {
if (sched_setscheduler(0, context->cpu_sched_policy |
(context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), ¶m) < 0) {
+ err = -errno;
r = EXIT_SETSCHEDULER;
- goto fail;
+ goto fail_child;
}
}
if (context->cpuset)
if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) {
+ err = -errno;
r = EXIT_CPUAFFINITY;
- goto fail;
+ goto fail_child;
}
if (context->ioprio_set)
if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
+ err = -errno;
r = EXIT_IOPRIO;
- goto fail;
+ goto fail_child;
}
if (context->timer_slack_nsec_set)
if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
+ err = -errno;
r = EXIT_TIMERSLACK;
- goto fail;
+ goto fail_child;
}
+ if (context->utmp_id)
+ utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path);
+
if (context->user) {
username = context->user;
- if (get_user_creds(&username, &uid, &gid, &home) < 0) {
+ err = get_user_creds(&username, &uid, &gid, &home);
+ if (err < 0) {
r = EXIT_USER;
- goto fail;
+ goto fail_child;
}
- if (is_terminal_input(context->std_input))
- if (chown_terminal(STDIN_FILENO, uid) < 0) {
+ if (is_terminal_input(context->std_input)) {
+ err = chown_terminal(STDIN_FILENO, uid);
+ if (err < 0) {
r = EXIT_STDIN;
- goto fail;
+ goto fail_child;
+ }
+ }
+
+ if (cgroup_bondings && context->control_group_modify) {
+ err = cgroup_bonding_set_group_access_list(cgroup_bondings, 0755, uid, gid);
+ if (err >= 0)
+ err = cgroup_bonding_set_task_access_list(cgroup_bondings, 0644, uid, gid);
+ if (err < 0) {
+ r = EXIT_CGROUP;
+ goto fail_child;
}
+ }
}
+ if (apply_permissions) {
+ err = enforce_groups(context, username, gid);
+ if (err < 0) {
+ r = EXIT_GROUP;
+ goto fail_child;
+ }
+ }
+
+ umask(context->umask);
+
#ifdef HAVE_PAM
if (context->pam_name && username) {
- if (setup_pam(context->pam_name, username, context->tty_path, &pam_env, fds, n_fds) < 0) {
+ err = setup_pam(context->pam_name, username, context->tty_path, &pam_env, fds, n_fds);
+ if (err < 0) {
r = EXIT_PAM;
- goto fail;
+ goto fail_child;
}
}
#endif
-
- if (apply_permissions)
- if (enforce_groups(context, username, uid) < 0) {
- r = EXIT_GROUP;
- goto fail;
+ if (context->private_network) {
+ if (unshare(CLONE_NEWNET) < 0) {
+ err = -errno;
+ r = EXIT_NETWORK;
+ goto fail_child;
}
- umask(context->umask);
+ loopback_setup();
+ }
if (strv_length(context->read_write_dirs) > 0 ||
strv_length(context->read_only_dirs) > 0 ||
strv_length(context->inaccessible_dirs) > 0 ||
context->mount_flags != MS_SHARED ||
- context->private_tmp)
- if ((r = setup_namespace(
- context->read_write_dirs,
- context->read_only_dirs,
- context->inaccessible_dirs,
- context->private_tmp,
- context->mount_flags)) < 0)
- goto fail;
+ context->private_tmp) {
+ err = setup_namespace(context->read_write_dirs,
+ context->read_only_dirs,
+ context->inaccessible_dirs,
+ context->private_tmp,
+ context->mount_flags);
+ if (err < 0) {
+ r = EXIT_NAMESPACE;
+ goto fail_child;
+ }
+ }
if (apply_chroot) {
if (context->root_directory)
if (chroot(context->root_directory) < 0) {
+ err = -errno;
r = EXIT_CHROOT;
- goto fail;
+ goto fail_child;
}
if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
+ err = -errno;
r = EXIT_CHDIR;
- goto fail;
+ goto fail_child;
}
} else {
if (asprintf(&d, "%s/%s",
context->root_directory ? context->root_directory : "",
context->working_directory ? context->working_directory : "") < 0) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
if (chdir(d) < 0) {
+ err = -errno;
free(d);
r = EXIT_CHDIR;
- goto fail;
+ goto fail_child;
}
free(d);
/* We repeat the fd closing here, to make sure that
* nothing is leaked from the PAM modules */
- if (close_all_fds(fds, n_fds) < 0 ||
- shift_fds(fds, n_fds) < 0 ||
- flags_fds(fds, n_fds, context->non_blocking) < 0) {
+ err = close_all_fds(fds, n_fds);
+ if (err >= 0)
+ err = shift_fds(fds, n_fds);
+ if (err >= 0)
+ err = flags_fds(fds, n_fds, context->non_blocking);
+ if (err < 0) {
r = EXIT_FDS;
- goto fail;
+ goto fail_child;
}
if (apply_permissions) {
continue;
if (setrlimit(i, context->rlimit[i]) < 0) {
+ err = -errno;
r = EXIT_LIMITS;
- goto fail;
+ goto fail_child;
+ }
+ }
+
+ if (context->capability_bounding_set_drop) {
+ err = do_capability_bounding_set_drop(context->capability_bounding_set_drop);
+ if (err < 0) {
+ r = EXIT_CAPABILITIES;
+ goto fail_child;
}
}
- if (context->user)
- if (enforce_user(context, uid) < 0) {
+ if (context->user) {
+ err = enforce_user(context, uid);
+ if (err < 0) {
r = EXIT_USER;
- goto fail;
+ goto fail_child;
}
+ }
- /* PR_GET_SECUREBITS is not priviliged, while
+ /* PR_GET_SECUREBITS is not privileged, while
* PR_SET_SECUREBITS is. So to suppress
* potential EPERMs we'll try not to call
* PR_SET_SECUREBITS unless necessary. */
if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
+ err = -errno;
r = EXIT_SECUREBITS;
- goto fail;
+ goto fail_child;
}
if (context->capabilities)
if (cap_set_proc(context->capabilities) < 0) {
+ err = -errno;
r = EXIT_CAPABILITIES;
- goto fail;
+ goto fail_child;
}
}
- if (!(our_env = new0(char*, 6))) {
+ if (!(our_env = new0(char*, 7))) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
if (n_fds > 0)
if (asprintf(our_env + n_env++, "LISTEN_PID=%lu", (unsigned long) getpid()) < 0 ||
asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
if (home)
if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
if (username)
if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
asprintf(our_env + n_env++, "USER=%s", username) < 0) {
+ err = -ENOMEM;
+ r = EXIT_MEMORY;
+ goto fail_child;
+ }
+
+ if (is_terminal_input(context->std_input) ||
+ context->std_output == EXEC_OUTPUT_TTY ||
+ context->std_error == EXEC_OUTPUT_TTY)
+ if (!(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
- assert(n_env <= 6);
+ assert(n_env <= 7);
if (!(final_env = strv_env_merge(
- 4,
+ 5,
environment,
our_env,
context->environment,
+ files_env,
pam_env,
NULL))) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
if (!(final_argv = replace_env_argv(argv, final_env))) {
+ err = -ENOMEM;
r = EXIT_MEMORY;
- goto fail;
+ goto fail_child;
}
+ final_env = strv_env_clean(final_env);
+
execve(command->path, final_argv, final_env);
+ err = -errno;
r = EXIT_EXEC;
- fail:
+ fail_child:
+ if (r != 0) {
+ log_open();
+ log_warning("Failed at step %s spawning %s: %s",
+ exit_status_to_string(r, EXIT_STATUS_SYSTEMD),
+ command->path, strerror(-err));
+ }
+
strv_free(our_env);
strv_free(final_env);
strv_free(pam_env);
+ strv_free(files_env);
strv_free(final_argv);
if (saved_stdin >= 0)
_exit(r);
}
+ strv_free(files_env);
+
/* We add the new process to the cgroup both in the child (so
* that we can be sure that no user code is ever executed
* outside of the cgroup) and in the parent (so that we can be
*ret = pid;
return 0;
+
+fail_parent:
+ strv_free(files_env);
+
+ return r;
}
void exec_context_init(ExecContext *c) {
assert(c);
- c->umask = 0002;
+ c->umask = 0022;
c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
c->cpu_sched_policy = SCHED_OTHER;
c->syslog_priority = LOG_DAEMON|LOG_INFO;
c->syslog_level_prefix = true;
c->mount_flags = MS_SHARED;
c->kill_signal = SIGTERM;
+ c->send_sigkill = true;
}
void exec_context_done(ExecContext *c) {
strv_free(c->environment);
c->environment = NULL;
+ strv_free(c->environment_files);
+ c->environment_files = NULL;
+
for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
free(c->rlimit[l]);
c->rlimit[l] = NULL;
if (c->cpuset)
CPU_FREE(c->cpuset);
+
+ free(c->utmp_id);
+ c->utmp_id = NULL;
}
void exec_command_done(ExecCommand *c) {
}
}
+int exec_context_load_environment(const ExecContext *c, char ***l) {
+ char **i, **r = NULL;
+
+ assert(c);
+ assert(l);
+
+ STRV_FOREACH(i, c->environment_files) {
+ char *fn;
+ int k;
+ bool ignore = false;
+ char **p;
+
+ fn = *i;
+
+ if (fn[0] == '-') {
+ ignore = true;
+ fn ++;
+ }
+
+ if (!path_is_absolute(fn)) {
+
+ if (ignore)
+ continue;
+
+ strv_free(r);
+ return -EINVAL;
+ }
+
+ if ((k = load_env_file(fn, &p)) < 0) {
+
+ if (ignore)
+ continue;
+
+ strv_free(r);
+ return k;
+ }
+
+ if (r == NULL)
+ r = p;
+ else {
+ char **m;
+
+ m = strv_env_merge(2, r, p);
+ strv_free(r);
+ strv_free(p);
+
+ if (!m)
+ return -ENOMEM;
+
+ r = m;
+ }
+ }
+
+ *l = r;
+
+ return 0;
+}
+
static void strv_fprintf(FILE *f, char **l) {
char **g;
"%sWorkingDirectory: %s\n"
"%sRootDirectory: %s\n"
"%sNonBlocking: %s\n"
- "%sPrivateTmp: %s\n",
+ "%sPrivateTmp: %s\n"
+ "%sControlGroupModify: %s\n"
+ "%sPrivateNetwork: %s\n",
prefix, c->umask,
prefix, c->working_directory ? c->working_directory : "/",
prefix, c->root_directory ? c->root_directory : "/",
prefix, yes_no(c->non_blocking),
- prefix, yes_no(c->private_tmp));
+ prefix, yes_no(c->private_tmp),
+ prefix, yes_no(c->control_group_modify),
+ prefix, yes_no(c->private_network));
- if (c->environment)
- for (e = c->environment; *e; e++)
- fprintf(f, "%sEnvironment: %s\n", prefix, *e);
+ STRV_FOREACH(e, c->environment)
+ fprintf(f, "%sEnvironment: %s\n", prefix, *e);
+
+ STRV_FOREACH(e, c->environment_files)
+ fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e);
if (c->tcpwrap_name)
fprintf(f,
"%sNice: %i\n",
prefix, c->nice);
- if (c->oom_adjust_set)
+ if (c->oom_score_adjust_set)
fprintf(f,
- "%sOOMAdjust: %i\n",
- prefix, c->oom_adjust);
+ "%sOOMScoreAdjust: %i\n",
+ prefix, c->oom_score_adjust);
for (i = 0; i < RLIM_NLIMITS; i++)
if (c->rlimit[i])
if (c->tty_path)
fprintf(f,
- "%sTTYPath: %s\n",
- prefix, c->tty_path);
+ "%sTTYPath: %s\n"
+ "%sTTYReset: %s\n"
+ "%sTTYVHangup: %s\n"
+ "%sTTYVTDisallocate: %s\n",
+ prefix, c->tty_path,
+ prefix, yes_no(c->tty_reset),
+ prefix, yes_no(c->tty_vhangup),
+ prefix, yes_no(c->tty_vt_disallocate));
if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG ||
- c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG)
+ c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
+ c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG ||
+ c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE)
fprintf(f,
"%sSyslogFacility: %s\n"
"%sSyslogLevel: %s\n",
- prefix, log_facility_to_string(LOG_FAC(c->syslog_priority)),
+ prefix, log_facility_unshifted_to_string(c->syslog_priority >> 3),
prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
if (c->capabilities) {
(c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
if (c->capability_bounding_set_drop) {
- fprintf(f, "%sCapabilityBoundingSetDrop:", prefix);
+ unsigned long l;
+ fprintf(f, "%sCapabilityBoundingSet:", prefix);
- for (i = 0; i <= CAP_LAST_CAP; i++)
- if (c->capability_bounding_set_drop & (1 << i)) {
+ for (l = 0; l <= cap_last_cap(); l++)
+ if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) {
char *t;
- if ((t = cap_to_name(i))) {
+ if ((t = cap_to_name(l))) {
fprintf(f, " %s", t);
- free(t);
+ cap_free(t);
}
}
fprintf(f,
"%sKillMode: %s\n"
- "%sKillSignal: SIG%s\n",
+ "%sKillSignal: SIG%s\n"
+ "%sSendSIGKILL: %s\n",
prefix, kill_mode_to_string(c->kill_mode),
- prefix, signal_to_string(c->kill_signal));
+ prefix, signal_to_string(c->kill_signal),
+ prefix, yes_no(c->send_sigkill));
+
+ if (c->utmp_id)
+ fprintf(f,
+ "%sUtmpIdentifier: %s\n",
+ prefix, c->utmp_id);
}
void exec_status_start(ExecStatus *s, pid_t pid) {
dual_timestamp_get(&s->start_timestamp);
}
-void exec_status_exit(ExecStatus *s, pid_t pid, int code, int status) {
+void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) {
assert(s);
if ((s->pid && s->pid != pid) ||
s->code = code;
s->status = status;
+
+ if (context) {
+ if (context->utmp_id)
+ utmp_put_dead_process(context->utmp_id, pid, code, status);
+
+ exec_context_tty_reset(context);
+ }
}
void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
assert(e);
if (*l) {
- /* It's kinda important that we keep the order here */
+ /* It's kind of important, that we keep the order here */
LIST_FIND_TAIL(ExecCommand, command, *l, end);
LIST_INSERT_AFTER(ExecCommand, command, *l, end, e);
} else
return 0;
}
-const char* exit_status_to_string(ExitStatus status) {
-
- /* We cast to int here, so that -Wenum doesn't complain that
- * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
-
- switch ((int) status) {
-
- case EXIT_SUCCESS:
- return "SUCCESS";
-
- case EXIT_FAILURE:
- return "FAILURE";
-
- case EXIT_INVALIDARGUMENT:
- return "INVALIDARGUMENT";
-
- case EXIT_NOTIMPLEMENTED:
- return "NOTIMPLEMENTED";
-
- case EXIT_NOPERMISSION:
- return "NOPERMISSION";
-
- case EXIT_NOTINSTALLED:
- return "NOTINSSTALLED";
-
- case EXIT_NOTCONFIGURED:
- return "NOTCONFIGURED";
-
- case EXIT_NOTRUNNING:
- return "NOTRUNNING";
-
- case EXIT_CHDIR:
- return "CHDIR";
-
- case EXIT_NICE:
- return "NICE";
-
- case EXIT_FDS:
- return "FDS";
-
- case EXIT_EXEC:
- return "EXEC";
-
- case EXIT_MEMORY:
- return "MEMORY";
-
- case EXIT_LIMITS:
- return "LIMITS";
-
- case EXIT_OOM_ADJUST:
- return "OOM_ADJUST";
-
- case EXIT_SIGNAL_MASK:
- return "SIGNAL_MASK";
-
- case EXIT_STDIN:
- return "STDIN";
-
- case EXIT_STDOUT:
- return "STDOUT";
-
- case EXIT_CHROOT:
- return "CHROOT";
-
- case EXIT_IOPRIO:
- return "IOPRIO";
-
- case EXIT_TIMERSLACK:
- return "TIMERSLACK";
-
- case EXIT_SECUREBITS:
- return "SECUREBITS";
-
- case EXIT_SETSCHEDULER:
- return "SETSCHEDULER";
-
- case EXIT_CPUAFFINITY:
- return "CPUAFFINITY";
-
- case EXIT_GROUP:
- return "GROUP";
-
- case EXIT_USER:
- return "USER";
-
- case EXIT_CAPABILITIES:
- return "CAPABILITIES";
-
- case EXIT_CGROUP:
- return "CGROUP";
-
- case EXIT_SETSID:
- return "SETSID";
-
- case EXIT_CONFIRM:
- return "CONFIRM";
-
- case EXIT_STDERR:
- return "STDERR";
-
- case EXIT_TCPWRAP:
- return "TCPWRAP";
-
- case EXIT_PAM:
- return "PAM";
-
- default:
- return NULL;
- }
-}
-
static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
[EXEC_INPUT_NULL] = "null",
[EXEC_INPUT_TTY] = "tty",
[EXEC_INPUT_SOCKET] = "socket"
};
+DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
+
static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
[EXEC_OUTPUT_INHERIT] = "inherit",
[EXEC_OUTPUT_NULL] = "null",
[EXEC_OUTPUT_TTY] = "tty",
[EXEC_OUTPUT_SYSLOG] = "syslog",
+ [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console",
[EXEC_OUTPUT_KMSG] = "kmsg",
+ [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console",
[EXEC_OUTPUT_SOCKET] = "socket"
};
DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
-DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
+static const char* const kill_mode_table[_KILL_MODE_MAX] = {
+ [KILL_CONTROL_GROUP] = "control-group",
+ [KILL_PROCESS] = "process",
+ [KILL_NONE] = "none"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode);
+
+static const char* const kill_who_table[_KILL_WHO_MAX] = {
+ [KILL_MAIN] = "main",
+ [KILL_CONTROL] = "control",
+ [KILL_ALL] = "all"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho);
~ianmdlvl / elogind.git / blobdiff