Running ls Command

Task

Implement the function run_ls

• Takes a char* path to a directory and runs ls on that path using one of the exec family of functions
• Should completely replace the current process (must not return)
• If exec fails, you should print an error using perror

Function Signature

// Given a path, execute `ls` on that path, replacing the current process.
void run_ls(char* path);

Note

• Use fgets or similar to read the path string from stdin
• Strip '\n' if present
• May use execlp, execl, or any other exec* function
• If the exec call fails, you should print a meaningful error and exit(1)
• Make sure function does not return if the exec call is successful

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Example

$ ./run_ls
.
run_ls
run_ls.c
 
$ ./run_ls
/nonexistent
ls: cannot access '/nonexistent': No such file or directory

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Code

int run_ls(const char str[]){
    execlp("ls", "ls", str, (char*)NULL);
    perror("exec");
    exit(1);
}