Save/restore errno in all safe wrappers

1 files changed, 4 insertions, 0 deletions

diff --git a/src/libstddjb/open3.c b/src/libstddjb/open3.c
index a9ff9e6..b7e5a4e 100644
--- a/src/libstddjb/open3.c
+++ b/src/libstddjb/open3.c
@@ -13,9 +13,11 @@
 
 int open3 (char const *s, unsigned int flags, unsigned int mode)
 {
+  int e = errno ;
   int r ;
   do r = open(s, flags, mode) ;
   while (r == -1 && errno == EINTR) ;
+  if (r >= 0) errno = e ;
   return r ;
 }
 
@@ -23,6 +25,7 @@ int open3 (char const *s, unsigned int flags, unsigned int mode)
 
 int open3 (char const *s, unsigned int flags, unsigned int mode)
 {
+  int e = errno ;
   int fd ;
   do fd = open(s, flags & ~O_CLOEXEC, mode) ;
   while (fd == -1 && errno == EINTR) ;
@@ -32,6 +35,7 @@ int open3 (char const *s, unsigned int flags, unsigned int mode)
     fd_close(fd) ;
     return -1 ;
   }
+  errno = e ;
   return fd ;
 }