文件系统：目录与文件

C13-Linux系统编程/fs/big.c

@@ -0,0 +1,34 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main(int argc, char **argv)
+{
+    if (argc < 2)
+    {
+        fprintf(stderr, "Usage:...\n");
+        exit(1);
+    }
+
+    int fd;
+
+    fd = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0600);
+    if (fd < 0)
+    {
+        perror("open()");
+        exit(1);
+    }
+
+    // 生成一个5G的文件
+    // !!! 整数溢出
+    lseek(fd, 5LL * 1024LL * 1024LL * 1024LL - 1LL, SEEK_SET);
+
+    // 写入尾0
+    write(fd, "", 1);
+
+    close(fd);
+    exit(0);
+}