Author: Guido Berhoerster <guido+debian.org@berhoerster.name>
Last-Update: Mon, 21 Aug 2017 21:43:09 +0000
Bug-Debian: https://bugs.debian.org/872865
Description: Enable gl_get_line() to detect EOF

--- a/getline.c
+++ b/getline.c
@@ -3296,6 +3296,7 @@ static GlReadStatus gl_read_input(GetLin
 static GlReadStatus gl_read_unmasked(GetLine *gl, int fd, char *c)
 {
   int nread;  /* The return value of read() */
+  int saved_errno;
 /*
  * Unblock the signals that we are trapping, while waiting for I/O.
  */
@@ -3307,6 +3308,7 @@ static GlReadStatus gl_read_unmasked(Get
   do {
     errno = 0;
     nread = read(fd, c, 1);
+    saved_errno = errno;
   } while(nread < 0 && errno==EINTR);
 /*
  * Block all of the signals that we are trapping.
@@ -3319,7 +3321,7 @@ static GlReadStatus gl_read_unmasked(Get
   case 1:
     return GL_READ_OK;
   case 0:
-    return (isatty(fd) || errno != 0) ? GL_READ_BLOCKED : GL_READ_EOF;
+    return (isatty(fd) || saved_errno != 0) ? GL_READ_BLOCKED : GL_READ_EOF;
   default:
     return GL_READ_ERROR;
   };