How to use execvp()

Question

The user will read a line and i will retain the first word as a command for execvp.

Lets say he will type \"cat file.txt\" ... command wil

Answer 1

The first argument is the file you wish to execute, and the second argument is an array of null-terminated strings that represent the appropriate arguments to the file as specified in the man page.

For example:

char *cmd = "ls";
char *argv[3];
argv[0] = "ls";
argv[1] = "-la";
argv[2] = NULL;

execvp(cmd, argv); //This will run "ls -la" as if it were a command