#include <linux/oom.h>
#include <sys/poll.h>
#include <linux/seccomp-bpf.h>
+#include <glob.h>
#ifdef HAVE_PAM
#include <security/pam_appl.h>
#include "capability.h"
#include "util.h"
#include "log.h"
+#include "sd-messages.h"
#include "ioprio.h"
#include "securebits.h"
#include "cgroup.h"
#include "loopback-setup.h"
#include "path-util.h"
#include "syscall-list.h"
+#include "env-util.h"
+#include "fileio.h"
#define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC)
vt_disallocate(context->tty_path);
}
+static bool is_terminal_output(ExecOutput o) {
+ return
+ o == EXEC_OUTPUT_TTY ||
+ o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE ||
+ o == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
+ o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE;
+}
+
+void exec_context_serialize(const ExecContext *context, Unit *u, FILE *f) {
+ assert(context);
+ assert(u);
+ assert(f);
+
+ if (context->tmp_dir)
+ unit_serialize_item(u, f, "tmp-dir", context->tmp_dir);
+
+ if (context->var_tmp_dir)
+ unit_serialize_item(u, f, "var-tmp-dir", context->var_tmp_dir);
+}
+
static int open_null_as(int flags, int nfd) {
int fd, r;
!!context->syslog_level_prefix,
output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE,
output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE,
- output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || output == EXEC_OUTPUT_KMSG_AND_CONSOLE || output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE);
+ is_terminal_output(output));
if (fd != nfd) {
r = dup2(fd, nfd) < 0 ? -errno : nfd;
}
}
-static int setup_output(const ExecContext *context, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin) {
+static int setup_output(const ExecContext *context, int fileno, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin) {
ExecOutput o;
ExecInput i;
+ int r;
assert(context);
assert(ident);
i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
o = fixup_output(context->std_output, socket_fd);
- /* This expects the input is already set up */
+ if (fileno == STDERR_FILENO) {
+ ExecOutput e;
+ e = fixup_output(context->std_error, socket_fd);
- switch (o) {
+ /* This expects the input and output are already set up */
+
+ /* Don't change the stderr file descriptor if we inherit all
+ * the way and are not on a tty */
+ if (e == EXEC_OUTPUT_INHERIT &&
+ o == EXEC_OUTPUT_INHERIT &&
+ i == EXEC_INPUT_NULL &&
+ !is_terminal_input(context->std_input) &&
+ getppid () != 1)
+ return fileno;
+
+ /* Duplicate from stdout if possible */
+ if (e == o || e == EXEC_OUTPUT_INHERIT)
+ return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno;
- case EXEC_OUTPUT_INHERIT:
+ o = e;
+ } else if (o == EXEC_OUTPUT_INHERIT) {
/* If input got downgraded, inherit the original value */
if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input))
- return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
+ return open_terminal_as(tty_path(context), O_WRONLY, fileno);
/* If the input is connected to anything that's not a /dev/null, inherit that... */
if (i != EXEC_INPUT_NULL)
- return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
+ return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno;
/* If we are not started from PID 1 we just inherit STDOUT from our parent process. */
if (getppid() != 1)
- return STDOUT_FILENO;
+ return fileno;
- /* We need to open /dev/null here anew, to get the
- * right access mode. So we fall through */
-
- case EXEC_OUTPUT_NULL:
- return open_null_as(O_WRONLY, STDOUT_FILENO);
-
- case EXEC_OUTPUT_TTY:
- if (is_terminal_input(i))
- return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
-
- /* We don't reset the terminal if this is just about output */
- 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:
- case EXEC_OUTPUT_JOURNAL:
- case EXEC_OUTPUT_JOURNAL_AND_CONSOLE:
- return connect_logger_as(context, o, ident, unit_id, STDOUT_FILENO);
-
- case EXEC_OUTPUT_SOCKET:
- assert(socket_fd >= 0);
- return dup2(socket_fd, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
-
- default:
- assert_not_reached("Unknown output type");
+ /* We need to open /dev/null here anew, to get the right access mode. */
+ return open_null_as(O_WRONLY, fileno);
}
-}
-
-static int setup_error(const ExecContext *context, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin) {
- ExecOutput o, e;
- ExecInput i;
-
- assert(context);
- assert(ident);
-
- i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
- o = fixup_output(context->std_output, socket_fd);
- e = fixup_output(context->std_error, socket_fd);
-
- /* This expects the input and output are already set up */
-
- /* Don't change the stderr file descriptor if we inherit all
- * the way and are not on a tty */
- if (e == EXEC_OUTPUT_INHERIT &&
- o == EXEC_OUTPUT_INHERIT &&
- i == EXEC_INPUT_NULL &&
- !is_terminal_input(context->std_input) &&
- getppid () != 1)
- return STDERR_FILENO;
- /* Duplicate from stdout if possible */
- if (e == o || e == EXEC_OUTPUT_INHERIT)
- return dup2(STDOUT_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
-
- switch (e) {
+ switch (o) {
case EXEC_OUTPUT_NULL:
- return open_null_as(O_WRONLY, STDERR_FILENO);
+ return open_null_as(O_WRONLY, fileno);
case EXEC_OUTPUT_TTY:
if (is_terminal_input(i))
- return dup2(STDIN_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
+ return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno;
/* We don't reset the terminal if this is just about output */
- return open_terminal_as(tty_path(context), O_WRONLY, STDERR_FILENO);
+ return open_terminal_as(tty_path(context), O_WRONLY, fileno);
case EXEC_OUTPUT_SYSLOG:
case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
case EXEC_OUTPUT_KMSG_AND_CONSOLE:
case EXEC_OUTPUT_JOURNAL:
case EXEC_OUTPUT_JOURNAL_AND_CONSOLE:
- return connect_logger_as(context, e, ident, unit_id, STDERR_FILENO);
+ r = connect_logger_as(context, o, ident, unit_id, fileno);
+ if (r < 0) {
+ log_struct_unit(LOG_CRIT, unit_id,
+ "MESSAGE=Failed to connect std%s of %s to the journal socket: %s",
+ fileno == STDOUT_FILENO ? "out" : "err",
+ unit_id, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
+ r = open_null_as(O_WRONLY, fileno);
+ }
+ return r;
case EXEC_OUTPUT_SOCKET:
assert(socket_fd >= 0);
- return dup2(socket_fd, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
+ return dup2(socket_fd, fileno) < 0 ? -errno : fileno;
default:
assert_not_reached("Unknown error type");
for (i = 0, n = 0; i < syscall_max(); i++)
if (syscall_filter[i >> 4] & (1 << (i & 31))) {
struct sock_filter item[] = {
- BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, i, 0, 1),
+ BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, INDEX_TO_SYSCALL(i), 0, 1),
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW)
};
int exec_spawn(ExecCommand *command,
char **argv,
- const ExecContext *context,
+ ExecContext *context,
int fds[], unsigned n_fds,
char **environment,
bool apply_permissions,
int r;
char *line;
int socket_fd;
- char **files_env = NULL;
+ char _cleanup_strv_free_ **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));
+ r = exec_context_load_environment(context, &files_env);
+ if (r < 0) {
+ log_struct_unit(LOG_ERR,
+ unit_id,
+ "MESSAGE=Failed to load environment files: %s", strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
return r;
}
argv = command->argv;
line = exec_command_line(argv);
- if (!line) {
- r = -ENOMEM;
- goto fail_parent;
- }
+ if (!line)
+ return log_oom();
- log_debug("About to execute: %s", line);
+ log_struct_unit(LOG_DEBUG,
+ unit_id,
+ "MESSAGE=About to execute %s", line,
+ NULL);
free(line);
r = cgroup_bonding_realize_list(cgroup_bondings);
if (r < 0)
- goto fail_parent;
+ return r;
cgroup_attribute_apply_list(cgroup_attributes, cgroup_bondings);
- if ((pid = fork()) < 0) {
- r = -errno;
- goto fail_parent;
+ if (context->private_tmp && !context->tmp_dir && !context->var_tmp_dir) {
+ r = setup_tmpdirs(&context->tmp_dir, &context->var_tmp_dir);
+ if (r < 0)
+ return r;
}
+ pid = fork();
+ if (pid < 0)
+ return -errno;
+
if (pid == 0) {
int i, err;
sigset_t ss;
const char *username = NULL, *home = NULL;
uid_t uid = (uid_t) -1;
gid_t gid = (gid_t) -1;
- char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL;
+ char _cleanup_strv_free_ **our_env = NULL, **pam_env = NULL,
+ **final_env = NULL, **final_argv = NULL;
unsigned n_env = 0;
bool set_access = false;
goto fail_child;
}
- err = setup_output(context, socket_fd, path_get_file_name(command->path), unit_id, apply_tty_stdin);
+ err = setup_output(context, STDOUT_FILENO, socket_fd, path_get_file_name(command->path), unit_id, apply_tty_stdin);
if (err < 0) {
r = EXIT_STDOUT;
goto fail_child;
}
- err = setup_error(context, socket_fd, path_get_file_name(command->path), unit_id, apply_tty_stdin);
+ err = setup_output(context, STDERR_FILENO, socket_fd, path_get_file_name(command->path), unit_id, apply_tty_stdin);
if (err < 0) {
r = EXIT_STDERR;
goto fail_child;
umask(context->umask);
#ifdef HAVE_PAM
- if (context->pam_name && username) {
+ if (apply_permissions && context->pam_name && username) {
err = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds);
if (err < 0) {
r = EXIT_PAM;
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->mount_flags != 0 ||
context->private_tmp) {
err = setup_namespace(context->read_write_dirs,
context->read_only_dirs,
context->inaccessible_dirs,
+ context->tmp_dir,
+ context->var_tmp_dir,
context->private_tmp,
context->mount_flags);
if (err < 0) {
goto fail_child;
}
} else {
-
- char *d;
+ char _cleanup_free_ *d = NULL;
if (asprintf(&d, "%s/%s",
context->root_directory ? context->root_directory : "",
if (chdir(d) < 0) {
err = -errno;
- free(d);
r = EXIT_CHDIR;
goto fail_child;
}
-
- free(d);
}
/* We repeat the fd closing here, to make sure that
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));
+ log_struct(LOG_ERR, MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED),
+ "EXECUTABLE=%s", command->path,
+ "MESSAGE=Failed at step %s spawning %s: %s",
+ exit_status_to_string(r, EXIT_STATUS_SYSTEMD),
+ command->path, strerror(-err),
+ "ERRNO=%d", -err,
+ NULL);
+ log_close();
}
- strv_free(our_env);
- strv_free(final_env);
- strv_free(pam_env);
- strv_free(files_env);
- strv_free(final_argv);
-
_exit(r);
}
- strv_free(files_env);
+ log_struct_unit(LOG_DEBUG,
+ unit_id,
+ "MESSAGE=Forked %s as %lu",
+ command->path, (unsigned long) pid,
+ NULL);
/* 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
if (cgroup_bondings)
cgroup_bonding_install_list(cgroup_bondings, pid, cgroup_suffix);
- log_debug("Forked %s as %lu", command->path, (unsigned long) pid);
-
exec_status_start(&command->exec_status, pid);
*ret = pid;
return 0;
-
-fail_parent:
- strv_free(files_env);
-
- return r;
}
void exec_context_init(ExecContext *c) {
c->cpu_sched_policy = SCHED_OTHER;
c->syslog_priority = LOG_DAEMON|LOG_INFO;
c->syslog_level_prefix = true;
- c->mount_flags = MS_SHARED;
c->control_group_persistent = -1;
c->ignore_sigpipe = true;
c->timer_slack_nsec = (nsec_t) -1;
}
-void exec_context_done(ExecContext *c) {
+void exec_context_tmp_dirs_done(ExecContext *c) {
+ assert(c);
+
+ if (c->tmp_dir) {
+ rm_rf_dangerous(c->tmp_dir, false, true, false);
+ free(c->tmp_dir);
+ c->tmp_dir = NULL;
+ }
+
+ if (c->var_tmp_dir) {
+ rm_rf_dangerous(c->var_tmp_dir, false, true, false);
+ free(c->var_tmp_dir);
+ c->var_tmp_dir = NULL;
+ }
+}
+
+void exec_context_done(ExecContext *c, bool reloading_or_reexecuting) {
unsigned l;
assert(c);
free(c->syscall_filter);
c->syscall_filter = NULL;
+
+ if (!reloading_or_reexecuting)
+ exec_context_tmp_dirs_done(c);
}
void exec_command_done(ExecCommand *c) {
int k;
bool ignore = false;
char **p;
+ glob_t pglob;
+ int count, n;
fn = *i;
return -EINVAL;
}
- if ((k = load_env_file(fn, &p)) < 0) {
+ /* Filename supports globbing, take all matching files */
+ zero(pglob);
+ errno = 0;
+ if (glob(fn, 0, NULL, &pglob) != 0) {
+ globfree(&pglob);
+ if (ignore)
+ continue;
+ strv_free(r);
+ return errno ? -errno : -EINVAL;
+ }
+ count = pglob.gl_pathc;
+ if (count == 0) {
+ globfree(&pglob);
if (ignore)
continue;
strv_free(r);
- return k;
+ return -EINVAL;
}
+ for (n = 0; n < count; n++) {
+ k = load_env_file(pglob.gl_pathv[n], &p);
+ if (k < 0) {
+ if (ignore)
+ continue;
- if (r == NULL)
- r = p;
- else {
- char **m;
+ strv_free(r);
+ globfree(&pglob);
+ return k;
+ }
- m = strv_env_merge(2, r, p);
- strv_free(r);
- strv_free(p);
+ 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;
+ if (!m) {
+ globfree(&pglob);
+ return -ENOMEM;
+ }
- r = m;
+ r = m;
+ }
}
+ globfree(&pglob);
}
*l = r;
return 0;
}
+static bool tty_may_match_dev_console(const char *tty) {
+ char *active = NULL, *console;
+ bool b;
+
+ if (startswith(tty, "/dev/"))
+ tty += 5;
+
+ /* trivial identity? */
+ if (streq(tty, "console"))
+ return true;
+
+ console = resolve_dev_console(&active);
+ /* if we could not resolve, assume it may */
+ if (!console)
+ return true;
+
+ /* "tty0" means the active VC, so it may be the same sometimes */
+ b = streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty));
+ free(active);
+
+ return b;
+}
+
+bool exec_context_may_touch_console(ExecContext *ec) {
+ return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate ||
+ is_terminal_input(ec->std_input) ||
+ is_terminal_output(ec->std_output) ||
+ is_terminal_output(ec->std_error)) &&
+ tty_may_match_dev_console(tty_path(ec));
+}
+
static void strv_fprintf(FILE *f, char **l) {
char **g;
if (c->rlimit[i])
fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
- if (c->ioprio_set)
+ if (c->ioprio_set) {
+ char *class_str;
+ int r;
+
+ r = ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str);
+ if (r < 0)
+ class_str = NULL;
fprintf(f,
"%sIOSchedulingClass: %s\n"
"%sIOPriority: %i\n",
- prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
+ prefix, strna(class_str),
prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
+ free(class_str);
+ }
- if (c->cpu_sched_set)
+ if (c->cpu_sched_set) {
+ char *policy_str;
+ int r;
+
+ r = sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str);
+ if (r < 0)
+ policy_str = NULL;
fprintf(f,
"%sCPUSchedulingPolicy: %s\n"
"%sCPUSchedulingPriority: %i\n"
"%sCPUSchedulingResetOnFork: %s\n",
- prefix, sched_policy_to_string(c->cpu_sched_policy),
+ prefix, strna(policy_str),
prefix, c->cpu_sched_priority,
prefix, yes_no(c->cpu_sched_reset_on_fork));
+ free(policy_str);
+ }
if (c->cpuset) {
fprintf(f, "%sCPUAffinity:", prefix);
if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG || c->std_output == EXEC_OUTPUT_JOURNAL ||
c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE ||
c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG || c->std_error == EXEC_OUTPUT_JOURNAL ||
- c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE)
+ c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) {
+ char *fac_str, *lvl_str;
+ int r;
+
+ r = log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str);
+ if (r < 0)
+ fac_str = NULL;
+
+ r = log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str);
+ if (r < 0)
+ lvl_str = NULL;
+
fprintf(f,
"%sSyslogFacility: %s\n"
"%sSyslogLevel: %s\n",
- prefix, log_facility_unshifted_to_string(c->syslog_priority >> 3),
- prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
+ prefix, strna(fac_str),
+ prefix, strna(lvl_str));
+ free(lvl_str);
+ free(fac_str);
+ }
if (c->capabilities) {
char *t;
~ianmdlvl / elogind.git / blobdiff