nspawn: use automatic cleanup for umask

src/shared/macro.h

@@ -191,5 +191,6 @@ static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
 #define _cleanup_fclose_ __attribute__((cleanup(fclosep)))
 #define _cleanup_close_ __attribute__((cleanup(closep)))
 #define _cleanup_closedir_ __attribute__((cleanup(closedirp)))
+#define _cleanup_umask_ __attribute__((cleanup(umaskp)))
 
 #include "log.h"

src/shared/util.c

@@ -5827,3 +5827,7 @@ void closedirp(DIR **d) {
         if (*d)
                 closedir(*d);
 }
+
+void umaskp(mode_t *u) {
+        umask(*u);
+}

src/shared/util.h

@@ -31,6 +31,7 @@
 #include <signal.h>
 #include <sched.h>
 #include <limits.h>
+#include <sys/types.h>
 #include <sys/stat.h>
 #include <dirent.h>
 #include <sys/resource.h>
@@ -533,3 +534,4 @@ void freep(void *p);
 void fclosep(FILE **f);
 void closep(int *fd);
 void closedirp(DIR **d);
+void umaskp(mode_t *u);