X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fcompat%2Fcompat-poll.c;h=b45b39dc6bdbd45daf69944316b1d663f1744867;hb=18710679a8ac57fda5dbd26cf16bb180dce9e286;hp=7d4d0e1334ef1dc2abba28f9e694d2ce8052d1ea;hpb=c607fe035ea8821a8f4c6ab6f3467ec726e36a63;p=lttng-tools.git

diff --git a/src/common/compat/compat-poll.c b/src/common/compat/compat-poll.c
index 7d4d0e133..b45b39dc6 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>
@@ -196,6 +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 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.
  */