Save/restore errno in all safe wrappers

1 files changed, 7 insertions, 3 deletions

diff --git a/src/libstddjb/fd_chmod.c b/src/libstddjb/fd_chmod.c
index be0e0b8..e882711 100644
--- a/src/libstddjb/fd_chmod.c
+++ b/src/libstddjb/fd_chmod.c
@@ -1,16 +1,20 @@
 /* ISC license. */
 
  /* OpenBSD manages to bork the fchmod declaration */
+
 #include <skalibs/nonposix.h>
+
 #include <sys/stat.h>
 #include <errno.h>
+
 #include <skalibs/djbunix.h>
 
 int fd_chmod (int fd, unsigned int mode)
 {
+  int e = errno ;
   int r ;
-  do
-    r = fchmod(fd, (mode_t)mode) ;
-  while ((r == -1) && (errno == EINTR)) ;
+  do r = fchmod(fd, (mode_t)mode) ;
+  while (r == -1 && errno == EINTR) ;
+  if (r >= 0) errno = e ;
   return r ;
 }