execvp - Read For Learn

Difference between exec, execvp, execl, execv?

Summary: In your case I would recommend to use execvp. To find out the differences between the exec* functions you should read the documentation:https://linux.die.net/man/3/exechttps://linux.die.net/man/2/execve The difference between execl* and execv* is the argument passing. execl* require a list of arguments while execv* require a vector of arguments.A list of arguments is useful if you know … Read more

Writing a simple shell in C using fork/execvp

The invalid option is because fgets() keeps the ‘\n’ when you press enter, try this when you are trying to call ls -l you are passing “-l\n” as the option, hence the message. You will have to change to

How to use execvp()

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: