util: introduce our own gperf based capability list

[elogind.git] / src / core / execute.c

diff --git a/src/core/execute.c b/src/core/execute.c
index d10f362c2e7d5ed52112c00d23a1b00e1ed05a6f..955090c44682942043416c58e3ad8795e2dc9929 100644 (file)
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -86,6 +86,7 @@
 #include "smack-util.h"
 #include "bus-kernel.h"
 #include "label.h"
+#include "cap-list.h"
 
 #ifdef HAVE_SECCOMP
 #include "seccomp-util.h"
@@ -823,7 +824,7 @@ 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_errno(-r, "Error: Failed to setresuid() in sd-pam: %m");
+                        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
@@ -885,7 +886,7 @@ fail:
                 log_error("PAM failed: %s", pam_strerror(handle, pam_code));
                 err = -EPERM;  /* PAM errors do not map to errno */
         } else {
-                log_error("PAM failed: %m");
+                log_error_errno(errno, "PAM failed: %m");
                 err = -errno;
         }
 
@@ -1238,11 +1239,12 @@ static int exec_child(ExecCommand *command,
                       int *error) {
 
         _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL;
+        _cleanup_free_ char *mac_selinux_context_net = NULL;
         const char *username = NULL, *home = NULL, *shell = NULL;
         unsigned n_dont_close = 0;
         int dont_close[n_fds + 4];
-        uid_t uid = (uid_t) -1;
-        gid_t gid = (gid_t) -1;
+        uid_t uid = UID_INVALID;
+        gid_t gid = GID_INVALID;
         int i, err;
 
         assert(command);
@@ -1436,7 +1438,7 @@ static int exec_child(ExecCommand *command,
 
 #ifdef ENABLE_KDBUS
         if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) {
-                uid_t ep_uid = (uid == (uid_t) -1) ? 0 : uid;
+                uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid;
 
                 err = bus_kernel_set_endpoint_policy(params->bus_endpoint_fd, ep_uid, context->bus_endpoint);
                 if (err < 0) {
@@ -1550,7 +1552,7 @@ static int exec_child(ExecCommand *command,
                                 context->mount_flags);
 
                 if (err == -EPERM)
-                        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));
+                        log_unit_warning_errno(params->unit_id, err, "Failed to set up file system namespace due to lack of privileges. Execution sandbox will not be in effect: %m");
                 else if (err < 0) {
                         *error = EXIT_NAMESPACE;
                         return err;
@@ -1584,6 +1586,16 @@ static int exec_child(ExecCommand *command,
                 }
         }
 
+#ifdef HAVE_SELINUX
+        if (params->apply_permissions && mac_selinux_use() && params->selinux_context_net && socket_fd >= 0) {
+                err = mac_selinux_get_child_mls_label(socket_fd, command->path, context->selinux_context, &mac_selinux_context_net);
+                if (err < 0) {
+                        *error = EXIT_SELINUX_CONTEXT;
+                        return err;
+                }
+        }
+#endif
+
         /* We repeat the fd closing here, to make sure that
          * nothing is leaked from the PAM modules. Note that
          * we are more aggressive this time since socket_fd
@@ -1683,24 +1695,10 @@ static int exec_child(ExecCommand *command,
 
 #ifdef HAVE_SELINUX
                 if (mac_selinux_use()) {
-                        if (context->selinux_context) {
-                                err = setexeccon(context->selinux_context);
-                                if (err < 0 && !context->selinux_context_ignore) {
-                                        *error = EXIT_SELINUX_CONTEXT;
-                                        return err;
-                                }
-                        }
-
-                        if (params->selinux_context_net && socket_fd >= 0) {
-                                _cleanup_free_ char *label = NULL;
+                        char *exec_context = mac_selinux_context_net ?: context->selinux_context;
 
-                                err = mac_selinux_get_child_mls_label(socket_fd, command->path, &label);
-                                if (err < 0) {
-                                        *error = EXIT_SELINUX_CONTEXT;
-                                        return err;
-                                }
-
-                                err = setexeccon(label);
+                        if (exec_context) {
+                                err = setexeccon(exec_context);
                                 if (err < 0) {
                                         *error = EXIT_SELINUX_CONTEXT;
                                         return err;
@@ -2299,13 +2297,8 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
                 fprintf(f, "%sCapabilityBoundingSet:", prefix);
 
                 for (l = 0; l <= cap_last_cap(); l++)
-                        if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) {
-                                _cleanup_cap_free_charp_ char *t;
-
-                                t = cap_to_name(l);
-                                if (t)
-                                        fprintf(f, " %s", t);
-                        }
+                        if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l)))
+                                fprintf(f, " %s", strna(capability_to_name(l)));
 
                 fputs("\n", f);
         }
@@ -2819,7 +2812,7 @@ void exec_runtime_destroy(ExecRuntime *rt) {
 
                 r = asynchronous_job(remove_tmpdir_thread, rt->tmp_dir);
                 if (r < 0) {
-                        log_warning_errno(-r, "Failed to nuke %s: %m", rt->tmp_dir);
+                        log_warning_errno(r, "Failed to nuke %s: %m", rt->tmp_dir);
                         free(rt->tmp_dir);
                 }
 
@@ -2831,7 +2824,7 @@ void exec_runtime_destroy(ExecRuntime *rt) {
 
                 r = asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir);
                 if (r < 0) {
-                        log_warning_errno(-r, "Failed to nuke %s: %m", rt->var_tmp_dir);
+                        log_warning_errno(r, "Failed to nuke %s: %m", rt->var_tmp_dir);
                         free(rt->var_tmp_dir);
                 }