1 files changed, 59 insertions, 0 deletions
diff --git a/gs/src/gp_stdia.c b/gs/src/gp_stdia.c
new file mode 100644
index 000000000..38d1ee212
--- /dev/null
+++ b/gs/src/gp_stdia.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 2001 artofcode LLC.  All rights reserved.
+  
+  This file is part of AFPL Ghostscript.
+  
+  AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND.  No author or
+  distributor accepts any responsibility for the consequences of using it, or
+  for whether it serves any particular purpose or works at all, unless he or
+  she says so in writing.  Refer to the Aladdin Free Public License (the
+  "License") for full details.
+  
+  Every copy of AFPL Ghostscript must include a copy of the License, normally
+  in a plain ASCII text file named PUBLIC.  The License grants you the right
+  to copy, modify and redistribute AFPL Ghostscript, but only under certain
+  conditions described in the License.  Among other things, the License
+  requires that the copyright notice and this notice be preserved on all
+  copies.
+*/
+
+/*$Id$ */
+/* Read stdin on platforms that support select and non-blocking read */
+
+#include "stdio_.h"
+#include "unistd_.h"
+#include "fcntl_.h"
+#include "errno_.h"
+#include "gx.h"
+#include "gp.h"
+#include "errors.h"
+
+/* Configure stdin for non-blocking reads if possible. */
+int gp_stdin_init(int fd)
+{
+    /* set file to non-blocking */
+    int flags = fcntl(fd, F_GETFL, 0);
+    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK))
+	return e_ioerror;
+    return 0;
+}
+
+/* Read bytes from stdin, using non-blocking if possible. */
+int gp_stdin_read(char *buf, int len, int interactive, int fd)
+{
+    fd_set rfds;
+    int count;
+    for (;;) {
+	count = read(fd, buf, len);
+	if (count >= 0)
+	    break;
+	if (errno == EAGAIN || errno == EWOULDBLOCK) {
+	    FD_ZERO(&rfds);
+	    FD_SET(fd, &rfds);
+	    select(1, &rfds, NULL, NULL, NULL);
+	} else if (errno != EINTR) {
+	    break;
+	}
+    }
+    return count;
+}
+