From 8923cf4f88ae6e665b0571ac435c72f62461efb3 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 6 Feb 2016 22:27:55 +0100
Subject: Track `writev` system call

---
 src/actual_function.h |  6 ++++++
 src/change_log.cc     | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/actual_function.h b/src/actual_function.h
index 0ffe0c2..8229ccf 100644
--- a/src/actual_function.h
+++ b/src/actual_function.h
@@ -7,6 +7,7 @@
 
 #include <dlfcn.h>
 #include <sys/mman.h>
+#include <sys/uio.h>
 
 #include <memory>
 #include <cstring>
@@ -31,6 +32,11 @@ namespace actual {
 		int, const void*, size_t
 	>("write");
 
+	static auto writev = get_actual_function<
+		ssize_t,
+		int, const iovec*, int
+	>("writev");
+
 	static auto rename = get_actual_function<
 		int,
 		const char*, const char*
diff --git a/src/change_log.cc b/src/change_log.cc
index 4caaa6a..a060c91 100644
--- a/src/change_log.cc
+++ b/src/change_log.cc
@@ -44,6 +44,18 @@ ssize_t write(int fd, const void* buffer, size_t count) {
 	return actual::write(fd, buffer, count);
 }
 
+ssize_t writev(int fd, const iovec* iov, int iovcnt) {
+	if ( fd != *fd_guard && utility::is_regular_file(fd) ) {
+		const std::string file_name{ utility::get_file_name(fd) };
+
+		if ( !tracker->is_tracked(file_name) ) {
+			tracker->track(file_name);
+		}
+	}
+
+	return actual::writev(fd, iov, iovcnt);
+}
+
 int rename(const char* old_path, const char* new_path) {
 	if ( !tracker->is_tracked(old_path) ) {
 		tracker->track(old_path);
-- 
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