LinuxQuestions.org - [SOLVED] execl function with pipe

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execl function with pipe

I am trying to fork a child process and use execl to execute sftp command. How can I run the following command using execl ?

Code:

echo "put <filename>" | sftp -i <private_key> <username>@password

Many thanks!

see man page of execl, you will see:

Quote:

The exec() family of functions replaces the current process image with a new process image.

furthermore:

Quote:

The const char *arg and subsequent ellipses in the execl(), execlp(), and execle() functions can be thought of as arg0, arg1, ..., argn. Together they describe a list of one or more pointers to null-terminated strings that represent the argument list available to the executed program.

You can see, pipe is not allowed.

Therefore you need to write a small script to implement what you need and execl that script.

Quote:

Originally Posted by pan64 (Post 5148005)

you need to write a small script to implement what you need and execl that script.

Thanks! It works

fork(2) and pipe(2) are you friends (or system(3))