chiark / gitweb /
treewide: no need to negate errno for log_*_errno()
[elogind.git] / src / core / execute.c
index caff2c6b5ce9c2fcf2a72ffb03c7d11ac73dd424..0f5152fb81d8c5343e01321c01d28a006b9a2f10 100644 (file)
@@ -83,6 +83,7 @@
 #include "af-list.h"
 #include "mkdir.h"
 #include "apparmor-util.h"
+#include "smack-util.h"
 #include "bus-kernel.h"
 #include "label.h"
 
@@ -425,12 +426,13 @@ static int setup_output(const ExecContext *context, int fileno, int socket_fd, c
         case EXEC_OUTPUT_JOURNAL_AND_CONSOLE:
                 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);
+                        log_unit_struct(unit_id,
+                                        LOG_CRIT,
+                                        LOG_MESSAGE("Failed to connect %s of %s to the journal socket: %s",
+                                                    fileno == STDOUT_FILENO ? "stdout" : "stderr",
+                                                    unit_id, strerror(-r)),
+                                        LOG_ERRNO(-r),
+                                        NULL);
                         r = open_null_as(O_WRONLY, fileno);
                 }
                 return r;
@@ -821,7 +823,7 @@ static int setup_pam(
                  * If this fails, ignore the error - but expect sd-pam threads
                  * to fail to exit normally */
                 if (setresuid(uid, uid, uid) < 0)
-                        log_error("Error: Failed to setresuid() in sd-pam: %s", strerror(-r));
+                        log_error_errno(r, "Error: Failed to setresuid() in sd-pam: %m");
 
                 /* Wait until our parent died. This will only work if
                  * the above setresuid() succeeds, otherwise the kernel
@@ -1444,8 +1446,10 @@ static int exec_child(ExecCommand *command,
         }
 #endif
 
-#ifdef HAVE_PAM
-        if (params->cgroup_path && context->user && context->pam_name) {
+        /* If delegation is enabled we'll pass ownership of the cgroup
+         * (but only in systemd's own controller hierarchy!) to the
+         * user of the new process. */
+        if (params->cgroup_path && context->user && params->cgroup_delegate) {
                 err = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, params->cgroup_path, 0644, uid, gid);
                 if (err < 0) {
                         *error = EXIT_CGROUP;
@@ -1459,7 +1463,6 @@ static int exec_child(ExecCommand *command,
                         return err;
                 }
         }
-#endif
 
         if (!strv_isempty(context->runtime_directory) && params->runtime_prefix) {
                 char **rt;
@@ -1547,7 +1550,7 @@ static int exec_child(ExecCommand *command,
                                 context->mount_flags);
 
                 if (err == -EPERM)
-                        log_warning_unit(params->unit_id, "Failed to set up file system namespace due to lack of privileges. Execution sandbox will not be in effect: %s", strerror(-err));
+                        log_unit_warning(params->unit_id, "Failed to set up file system namespace due to lack of privileges. Execution sandbox will not be in effect: %s", strerror(-err));
                 else if (err < 0) {
                         *error = EXIT_NAMESPACE;
                         return err;
@@ -1617,6 +1620,16 @@ static int exec_child(ExecCommand *command,
                         }
                 }
 
+#ifdef HAVE_SMACK
+                if (context->smack_process_label) {
+                        err = mac_smack_apply_pid(0, context->smack_process_label);
+                        if (err < 0) {
+                                *error = EXIT_SMACK_PROCESS_LABEL;
+                                return err;
+                        }
+                }
+#endif
+
                 if (context->user) {
                         err = enforce_user(context, uid);
                         if (err < 0) {
@@ -1669,7 +1682,7 @@ static int exec_child(ExecCommand *command,
 #endif
 
 #ifdef HAVE_SELINUX
-                if (use_selinux()) {
+                if (mac_selinux_use()) {
                         if (context->selinux_context) {
                                 err = setexeccon(context->selinux_context);
                                 if (err < 0 && !context->selinux_context_ignore) {
@@ -1697,7 +1710,7 @@ static int exec_child(ExecCommand *command,
 #endif
 
 #ifdef HAVE_APPARMOR
-                if (context->apparmor_profile && use_apparmor()) {
+                if (context->apparmor_profile && mac_apparmor_use()) {
                         err = aa_change_onexec(context->apparmor_profile);
                         if (err < 0 && !context->apparmor_profile_ignore) {
                                 *error = EXIT_APPARMOR_PROFILE;
@@ -1739,10 +1752,10 @@ static int exec_child(ExecCommand *command,
                 line = exec_command_line(final_argv);
                 if (line) {
                         log_open();
-                        log_struct_unit(LOG_DEBUG,
-                                        params->unit_id,
+                        log_unit_struct(params->unit_id,
+                                        LOG_DEBUG,
                                         "EXECUTABLE=%s", command->path,
-                                        "MESSAGE=Executing: %s", line,
+                                        LOG_MESSAGE("Executing: %s", line),
                                         NULL);
                         log_close();
                 }
@@ -1787,11 +1800,11 @@ int exec_spawn(ExecCommand *command,
 
         err = exec_context_load_environment(context, params->unit_id, &files_env);
         if (err < 0) {
-                log_struct_unit(LOG_ERR,
-                           params->unit_id,
-                           "MESSAGE=Failed to load environment files: %s", strerror(-err),
-                           "ERRNO=%d", -err,
-                           NULL);
+                log_unit_struct(params->unit_id,
+                                LOG_ERR,
+                                LOG_MESSAGE("Failed to load environment files: %s", strerror(-err)),
+                                LOG_ERRNO(-err),
+                                NULL);
                 return err;
         }
 
@@ -1801,10 +1814,10 @@ int exec_spawn(ExecCommand *command,
         if (!line)
                 return log_oom();
 
-        log_struct_unit(LOG_DEBUG,
-                        params->unit_id,
+        log_unit_struct(params->unit_id,
+                        LOG_DEBUG,
                         "EXECUTABLE=%s", command->path,
-                        "MESSAGE=About to execute: %s", line,
+                        LOG_MESSAGE("About to execute: %s", line),
                         NULL);
         free(line);
 
@@ -1826,12 +1839,13 @@ int exec_spawn(ExecCommand *command,
                                  &r);
                 if (r != 0) {
                         log_open();
-                        log_struct(LOG_ERR, MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED),
+                        log_struct(LOG_ERR,
+                                   LOG_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,
+                                   LOG_MESSAGE("Failed at step %s spawning %s: %s",
+                                               exit_status_to_string(r, EXIT_STATUS_SYSTEMD),
+                                               command->path, strerror(-err)),
+                                   LOG_ERRNO(-err),
                                    NULL);
                         log_close();
                 }
@@ -1839,10 +1853,10 @@ int exec_spawn(ExecCommand *command,
                 _exit(r);
         }
 
-        log_struct_unit(LOG_DEBUG,
-                        params->unit_id,
-                        "MESSAGE=Forked %s as "PID_FMT,
-                        command->path, pid,
+        log_unit_struct(params->unit_id,
+                        LOG_DEBUG,
+                        LOG_MESSAGE("Forked %s as "PID_FMT,
+                                    command->path, pid),
                         NULL);
 
         /* We add the new process to the cgroup both in the child (so
@@ -2402,6 +2416,21 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
                         prefix, c->apparmor_profile_ignore ? "-" : "", c->apparmor_profile);
 }
 
+bool exec_context_maintains_privileges(ExecContext *c) {
+        assert(c);
+
+        /* Returns true if the process forked off would run run under
+         * an unchanged UID or as root. */
+
+        if (!c->user)
+                return true;
+
+        if (streq(c->user, "root") || streq(c->user, "0"))
+                return true;
+
+        return false;
+}
+
 void exec_status_start(ExecStatus *s, pid_t pid) {
         assert(s);
 
@@ -2744,7 +2773,7 @@ int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, co
                         return r;
 
                 if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd))
-                        log_debug_unit(u->id, "Failed to parse netns socket value %s", value);
+                        log_unit_debug(u->id, "Failed to parse netns socket value %s", value);
                 else {
                         safe_close((*rt)->netns_storage_socket[0]);
                         (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd);
@@ -2757,7 +2786,7 @@ int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, co
                         return r;
 
                 if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd))
-                        log_debug_unit(u->id, "Failed to parse netns socket value %s", value);
+                        log_unit_debug(u->id, "Failed to parse netns socket value %s", value);
                 else {
                         safe_close((*rt)->netns_storage_socket[1]);
                         (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd);
@@ -2790,7 +2819,7 @@ void exec_runtime_destroy(ExecRuntime *rt) {
 
                 r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir);
                 if (r < 0) {
-                        log_warning("Failed to nuke %s: %s", rt->tmp_dir, strerror(-r));
+                        log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir);
                         free(rt->tmp_dir);
                 }
 
@@ -2802,7 +2831,7 @@ void exec_runtime_destroy(ExecRuntime *rt) {
 
                 r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir);
                 if (r < 0) {
-                        log_warning("Failed to nuke %s: %s", rt->var_tmp_dir, strerror(-r));
+                        log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir);
                         free(rt->var_tmp_dir);
                 }