1 files changed, 53 insertions, 0 deletions
diff --git a/libpam/pam_modutil_ioloop.c b/libpam/pam_modutil_ioloop.c
new file mode 100644
index 0000000..54ab0e5
--- /dev/null
+++ b/libpam/pam_modutil_ioloop.c
@@ -0,0 +1,53 @@
+/*
+ * $Id$
+ *
+ * These functions provides common methods for ensure a complete read or
+ * write occurs. It handles EINTR and partial read/write returns.
+ */
+
+#include "pam_modutil_private.h"
+
+#include <unistd.h>
+#include <errno.h>
+
+int
+pam_modutil_read(int fd, char *buffer, int count)
+{
+       int block, offset = 0;
+
+       while (count > 0) {
+               block = read(fd, &buffer[offset], count);
+
+               if (block < 0) {
+                       if (errno == EINTR) continue;
+                       return block;
+               }
+               if (block == 0) return offset;
+
+               offset += block;
+               count -= block;
+       }
+
+       return offset;
+}
+
+int
+pam_modutil_write(int fd, const char *buffer, int count)
+{
+       int block, offset = 0;
+
+       while (count > 0) {
+               block = write(fd, &buffer[offset], count);
+
+               if (block < 0) {
+                       if (errno == EINTR) continue;
+                       return block;
+               }
+               if (block == 0) return offset;
+
+               offset += block;
+               count -= block;
+       }
+
+       return offset;
+}