测试

combine.cpp

@@ -0,0 +1,22 @@
+#include<fcntl.h>
+#include<sys/types.h>
+#include<unistd.h>
+#include<sys/stat.h>
+#define LEN 512
+int main(int argc, char** argv) {
+	int f1, f2, f3, n = 0;
+	char buf[520], ch = '\n';
+	f1 = open(argv[1], O_RDWR);
+	f2 = open(argv[2], O_RDWR);
+	f3 = open(argv[3], O_CREAT | O_RDWR);
+	while ((n = read(f1, buf, LEN)) > 0)
+		write(f3, buf, n);
+	write(f3, &ch, 1);
+	while ((n = read(f2, buf, LEN)) > 0)
+		write(f3, buf, n);
+	close(f1);
+	close(f2);
+	close(f3);
+	return 0;
+}
+