UTIL: Unify the fd_nonblocking implementation

The responder and child_common modules each had their own
implementation. Unify it instead and add a unit test.

Reviewed-by: Pavel Březina <pbrezina@redhat.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/src/util/util.c b/src/util/util.c
index 2acb8604a..613c559bb 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -880,3 +880,27 @@ done:
 
     return ret;
 }
+
+/* Set the nonblocking flag to the fd */
+errno_t sss_fd_nonblocking(int fd)
+{
+    int flags;
+    int ret;
+
+    flags = fcntl(fd, F_GETFL, 0);
+    if (flags == -1) {
+        ret = errno;
+        DEBUG(SSSDBG_CRIT_FAILURE,
+              "F_GETFL failed [%d][%s].\n", ret, strerror(ret));
+        return ret;
+    }
+
+    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
+        ret = errno;
+        DEBUG(SSSDBG_CRIT_FAILURE,
+              "F_SETFL failed [%d][%s].\n", ret, strerror(ret));
+        return ret;
+    }
+
+    return EOK;
+}