C - UNIX commands in program

Question

I'm trying to create a program where it would count the number of directories, or the number of readable/writable/executable files. The user would input only the name of the author and the letters "d", "r", "w", or "x". I tried to directly call "ls -l" in my program but that caused an error. How do you call UNIX commands within a C program?

Answer 1

I tried to directly call "ls -l" in my program but that caused an error. How do you call UNIX commands within a C program?

You can se system in your C program, for example:

system( "ls -l" );

For that to work, you'll also need to #include <stdlib.h>

Answer 2

使用find命令可能会更好，可以使用命令“ find。-td | wc -l”对目录进行计数，并对带有适当标志的文件执行类似的操作。