Fix allread errno management

Signed-off-by: Laurent Bercot <ska@appnovation.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/libstddjb/openreadfileclose.c b/src/libstddjb/openreadfileclose.c
index afa895a..144f264 100644
--- a/src/libstddjb/openreadfileclose.c
+++ b/src/libstddjb/openreadfileclose.c
@@ -1,6 +1,8 @@
 /* ISC license. */
 
 #include <sys/stat.h>
+#include <errno.h>
+
 #include <skalibs/allreadwrite.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/djbunix.h>
@@ -8,6 +10,7 @@
 int openreadfileclose (char const *file, stralloc *sa, size_t limit)
 {
   size_t n ;
+  int e = errno ;
   int fd = openbc_read(file) ;
   if (fd < 0) return 0 ;
   {
@@ -18,11 +21,14 @@ int openreadfileclose (char const *file, stralloc *sa, size_t limit)
   if (limit && (limit < n)) n = limit ;
   if (!stralloc_ready_tuned(sa, sa->len + n, 0, 0, 1)) goto err ;
   {
-    size_t r = allread(fd, sa->s + sa->len, n) ;
+    size_t r ;
+    errno = EPIPE ;
+    r = allread(fd, sa->s + sa->len, n) ;
     sa->len += r ;
     if (r < n) goto err ;
   }
   fd_close(fd) ;
+  errno = e ;
   return 1 ;
 
 err: