[PATCH 19/33] Block till request

Janani Venkataraman
2014-03-20T09:41:56Z

Block until input arrives on the socket.

Signed-off-by: Janani Venkataraman <jananive@linux.vnet.ibm.com>
---
src/coredump.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)

diff --git a/src/coredump.c b/src/coredump.c
index c992c66..d93f4b2 100644
--- a/src/coredump.c
+++ b/src/coredump.c
@@ -349,6 +349,38 @@ int setup_server(void)
return 0;
}

+/* Blocking on a request */
+int block_on_request(void)
+{
+ fd_set read;
+
+ do {
+ /* Initialise */
+ FD_ZERO(&read);
+ FD_SET(socket_fd, &read);
+
+ gencore_log("[%d]: Waiting on incoming request.\n", pid_log);
+
+ if (select(socket_fd + 1, &read, NULL, NULL, NULL) <= 0) {
+ /*
+ * EINTR just means a signal is caught and hence, we need not
+ * terminate for this error.
+ */
+ if (errno != EINTR) {
+ gencore_log("[%d]: Error while waiting for connection requests.\n",
+ pid_log, strerror(errno));
+ close(socket_fd);
+ return -1;
+ }
+ }
+
+ } while(FD_ISSET(socket_fd, &read) == 0);
+
+ gencore_log("[%d]: Request found.\n", pid_log);
+
+ return 0;
+}
+
/* Daemon for self dump */
int daemon_dump(void)
{
@@ -386,6 +418,19 @@ int daemon_dump(void)
/* Flush the log */
fflush(fp_log);

+ while (1) {
+
+ /* Blocks on request */
+ ret = block_on_request();
+ if (ret)
+ goto cleanup;
+
+ /* Flush the log */
+ fflush(fp_log);
+ }
+
+ return 0;
+
cleanup:

fclose(fp_log);