X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fcompat%2Fcompat-poll.c;h=2b459e42f9fed14d565d371963e233c50c59e168;hb=4a82ca8ba74b28186652f228a0f479748b6120c3;hp=e4f1a3fed47c296c99feb980aa35d8615dcf667f;hpb=890d8fe47755c3bad936389cf48ffa141cff41c9;p=lttng-tools.git

diff --git a/src/common/compat/compat-poll.c b/src/common/compat/compat-poll.c
index e4f1a3fed..2b459e42f 100644
--- a/src/common/compat/compat-poll.c
+++ b/src/common/compat/compat-poll.c
@@ -20,6 +20,7 @@
 #include <stdlib.h>
 #include <sys/resource.h>
 #include <sys/time.h>
+#include <stdbool.h>
 
 #include <common/defaults.h>
 #include <common/error.h>
@@ -111,8 +112,9 @@ int compat_poll_create(struct lttng_poll_event *events, int size)
 	}
 
 	if (!poll_max_size) {
-		ERR("poll_max_size not initialized yet");
-		goto error;
+		if (lttng_poll_set_max_size()) {
+			goto error;
+		}
 	}
 
 	/* Don't bust the limit here */
@@ -195,6 +197,42 @@ error:
 	return -1;
 }
 
+/*
+ * Modify an fd's events..
+ */
+int compat_poll_mod(struct lttng_poll_event *events, int fd,
+		uint32_t req_events)
+{
+	int ret, i;
+	bool fd_found = false;
+	struct compat_poll_event_array *current;
+
+	if (events == NULL || events->current.events == NULL || fd < 0) {
+		ERR("Bad compat poll mod arguments");
+		goto error;
+	}
+
+	current = &events->current;
+
+	for (i = 0; i < current->nb_fd; i++) {
+		if (current->events[i].fd == fd) {
+			fd_found = true;
+			current->events[i].events = req_events;
+			events->need_update = 1;
+			break;
+		}
+	}
+
+	if (!fd_found) {
+		goto error;
+	}
+
+	return 0;
+
+error:
+	return -1;
+}
+
 /*
  * Remove a fd from the pollfd structure.
  */
@@ -268,7 +306,9 @@ int compat_poll_wait(struct lttng_poll_event *events, int timeout)
 		}
 	}
 
-	ret = poll(events->wait.events, events->wait.nb_fd, timeout);
+	do {
+		ret = poll(events->wait.events, events->wait.nb_fd, timeout);
+	} while (ret == -1 && errno == EINTR);
 	if (ret < 0) {
 		/* At this point, every error is fatal */
 		PERROR("poll wait");