v7 man page for system

SYSTEM(3)						     Library Functions Manual							 SYSTEM(3)

NAME
       system - issue a shell command

SYNOPSIS
       system(string)
       char *string;

DESCRIPTION
       System  causes  the  string  to be given to sh(1) as input as if the string had been typed as a command at a terminal.  The current process
       waits until the shell has completed, then returns the exit status of the shell.

SEE ALSO
       popen(3), exec(2), wait(2)

DIAGNOSTICS
       Exit status 127 indicates the shell couldn't be executed.

																	 SYSTEM(3)