Operating system This is my own preparation of the operating system processes and threads of the C source code. The specific role of the code has been explained in the Notes. Hope it helps you

code
....\.DS_Store
__MACOSX
........\code
........\....\._.DS_Store
code\process_control
....\...............\.DS_Store
__MACOSX\code\process_control
........\....\...............\._.DS_Store
code\process_control\a.out
....\...............\clone.c
....\...............\exec.c
....\...............\fork.c
....\...............\fork_add.c
....\...............\fork_adds.c
....\...............\forks.c
....\...............\pids.c
....\...............\vfork.c
....\...............\wait.c
....\...............\waitpid.c
....\process_sync
....\............\a.out
....\............\counter.dat
....\............\psync-nolock.c
....\............\tsync-lock.c
....\............\tsync-nolock.c
....\shell_script
....\............\sh01.sh
....\............\sh02.sh
....\............\sh03.sh
....\............\sh04.sh
....\............\sh05.sh
....\............\sh06-2.sh
....\............\sh06.sh
....\............\sh07.sh
....\............\sh08.sh
....\............\sh09.sh
....\............\sh10.sh
....\............\sh12-2.sh
....\............\sh12-3.sh
....\............\sh12.sh
....\............\sh13-2.sh
....\............\sh13.sh
....\............\sh14.sh
....\............\sh15.sh
....\............\sh17.sh
....\............\sh18.sh
....\............\sh19.sh
....\thread
....\......\a.out
....\......\p_cancel.c
....\......\p_create.c
....\......\p_join.c
....\......\p_mutex.c
....\......\p_self.c
....\......\p_sem.c

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