Unix/linux Programming Practice Tutorials

EXECVP start a new program in the program:

To create a new process with fork:

Forkdemo2 Code:

When testing the fork, refer to the Linux authoritative guide reading notes (3) using patches:

[Email protected] programming]#diff-C forkdemo2.c forkdemo2_new.c > Forkdemo2.Patch[email protected] programming]#Patch< Forkdemo2.PatchPatchingfileForkdemo2.c[[email protected] programming]#ls-Lrttotal7-rwxrwxrwx1Root root4953Sep6  One: toForkdemo2-rwxrwxrwx1Root root4957Sep6  One: -forkdemo2_new-rwxrwxrwx1Root root119Sep6  One: -forkdemo2_new.c-rwxrwxrwx1Root root263Sep6  One: -Forkdemo2.Patch-rwxrwxrwx1Root root119Sep6  One: - forkdemo2.c[[email protected] programming]# 

This FORKDEMO2 output PID number is also very interesting, preferably from the bottom of the bargain.

How to determine whether a parent or child process: The return value of fork () in the parent process is the PID of the child process, which is 0 in the child process.

Unix/linux Programming Practice Tutorials