Converting bash command to C code
 

What is the equivalent built in function call in C to kill a process and to shutdown an ethernet card?

Bash code
1) killall smbd > /dev/null
2) ifconfig eth0 down > /dev/null
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C code ?

1)
2)

man system

man execvp

I think one of those should help

And/or

man 2 kill

or...
 

If there is a specific C funtion that works then go with that but the less desireable, efficient or professional way would be to use a system command included in unistd.h system("..."); You can use any command that you would issue from the bash prompt just through your application.

:)