execute system command from c
 

Hi i need to execute in system command in c .... The previous days i had succesfully used the execl so as to remove a file from the system execl("rm,"rm","-l","my file"); and has worked fine;

Now i want to execute sth more difficult and i think i need your help
i want to execute the following
tc -s class show dev eth0
HELP

Fork-Exec Or System(3)
 

I don't think that this is really any different from any other command issued from a C program; if you need to grab the output into a pipe or something you can fork and exec, or if you just need the output to show up on the terminal you could use a call to system(3).

I'd recommend "popen()" for capturing the output from a pipe. Much easier.
See "man 3 popen".