Add unit test for fsendfile()

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

tests/.gitignore

@@ -1,5 +1,6 @@
 *.log
 *.trs
+fsendfile
 lfile
 makepath
 pidfile

tests/Makefile.am

@@ -2,6 +2,7 @@ EXTRA_DIST      = check.h
 CLEANFILES      = *~ *.trs *.log
 
 TESTS           =
+TESTS          += fsendfile
 TESTS          += lfile
 TESTS          += makepath
 TESTS          += pidfile

tests/fsendfile.c

@@ -0,0 +1,31 @@
+#include <err.h>
+#include <unistd.h>
+#include "check.h"
+
+int main(void)
+{
+	int i = 0;
+	char *files[] = {
+		"/etc/passwd", "/tmp/tok",
+		"/etc/passwd", "/tmp/passwd",
+		"/etc/passwd", "/tmp/passwd",
+		NULL
+	};
+	FILE *src, *dst;
+
+	while (files[i]) {
+                src = fopen(files[i], "r");
+                dst = fopen(files[i + 1], "w");
+		printf("fsendfile(%s, %s, 512)\t", files[i], files[i + 1]);
+		if (-1 == fsendfile(src, dst, 512))
+			err(1, "Failed fsendfile(%s, %s)", files[i], files[i + 1]);
+
+		if (!access(files[i + 1], F_OK))
+			printf("OK => %s\n", files[i + 1]);
+
+		remove(files[i + 1]);
+		i += 2;
+	}
+
+	return 0;
+}