ctdb-common: Copy functions sys_read() and sys_write() from source3

We really should extricate these from source3 and into some common
code.  However, just copy them for now to help get rid of a lot of
warnings.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/ctdb/common/system_util.c b/ctdb/common/system_util.c
index fe0f403f48..344e7d797e 100644
--- a/ctdb/common/system_util.c
+++ b/ctdb/common/system_util.c
@@ -369,3 +369,37 @@ void mkdir_p_or_die(const char *dir, int mode)
 		exit(1);
 	}
 }
+
+/* A read wrapper that will deal with EINTR.  For now, copied from
+ * source3/lib/system.c
+ */
+ssize_t sys_read(int fd, void *buf, size_t count)
+{
+        ssize_t ret;
+
+        do {
+                ret = read(fd, buf, count);
+#if defined(EWOULDBLOCK)
+        } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
+#else
+        } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+#endif
+        return ret;
+}
+
+/* A write wrapper that will deal with EINTR.  For now, copied from
+ * source3/lib/system.c
+ */
+ssize_t sys_write(int fd, const void *buf, size_t count)
+{
+        ssize_t ret;
+
+        do {
+                ret = write(fd, buf, count);
+#if defined(EWOULDBLOCK)
+        } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
+#else
+        } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+#endif
+        return ret;
+}