pipe
....\fifo
....\....\configs.h
....\....\fiforead
....\....\fiforead.c
....\....\fifowrite
....\....\fifowrite.c
....\pipetest
....\pipetest.c
....\popen
....\.....\popenread
....\.....\popenread.c
....\.....\popenwrite
....\.....\popenwrite.c