tree-wide: use new RET_NERRNO() helper at various places

src/basic/env-util.c

@@ -8,6 +8,7 @@
 
 #include "alloc-util.h"
 #include "env-util.h"
+#include "errno-util.h"
 #include "escape.h"
 #include "extract-word.h"
 #include "macro.h"
@@ -786,15 +787,12 @@ int getenv_bool_secure(const char *p) {
 }
 
 int set_unset_env(const char *name, const char *value, bool overwrite) {
-        int r;
+        assert(name);
 
         if (value)
-                r = setenv(name, value, overwrite);
-        else
-                r = unsetenv(name);
-        if (r < 0)
-                return -errno;
-        return 0;
+                return RET_NERRNO(setenv(name, value, overwrite));
+
+        return RET_NERRNO(unsetenv(name));
 }
 
 int putenv_dup(const char *assignment, bool override) {
@@ -807,9 +805,7 @@ int putenv_dup(const char *assignment, bool override) {
         n = strndupa_safe(assignment, e - assignment);
 
         /* This is like putenv(), but uses setenv() so that our memory doesn't become part of environ[]. */
-        if (setenv(n, e + 1, override) < 0)
-                return -errno;
-        return 0;
+        return RET_NERRNO(setenv(n, e + 1, override));
 }
 
 int setenv_systemd_exec_pid(bool update_only) {