Writing to both stdout & a file

Question

I have a parent process which forks out a child to perform execv().

I need the output given by execv() to stdout to be displayed onscreen as also copied to a log fil

Answer 1

Also, you can use fifo's. mkfifo my.fifo; in execv: program > my.fifo; and open fifo as a regular file, reading from it. This way you can have your stdout parsed, but it has minor drawbacks with shared access.