$ sleep 100 | sleep 200 | sleep 300 & ps -efH | grep "sleep" -B1
[1] 32383
adrians  14872 14770  0 00:11 pts/0    00:00:00     bash
adrians  32381 14872  0 21:35 pts/0    00:00:00       sleep 100
adrians  32382 14872  0 21:35 pts/0    00:00:00       sleep 200
adrians  32383 14872  0 21:35 pts/0    00:00:00       sleep 300
adrians  32384 14872  0 21:35 pts/0    00:00:00       ps -efH
adrians  32385 14872  0 21:35 pts/0    00:00:00       grep --colour=auto sleep -B1
$ ls -l /proc/32381/fd
total 0
lrwx------ 1 adrians adrians 64 Mar 12 21:36 0 -> /dev/pts/0
l-wx------ 1 adrians adrians 64 Mar 12 21:36 1 -> 'pipe:[545613]'
lrwx------ 1 adrians adrians 64 Mar 12 21:36 2 -> /dev/pts/0
$ ls -l /proc/32382/fd
total 0
lr-x------ 1 adrians adrians 64 Mar 12 21:36 0 -> 'pipe:[545613]'
l-wx------ 1 adrians adrians 64 Mar 12 21:36 1 -> 'pipe:[545615]'
lrwx------ 1 adrians adrians 64 Mar 12 21:36 2 -> /dev/pts/0
$ ls -l /proc/32383/fd
total 0
lr-x------ 1 adrians adrians 64 Mar 12 21:36 0 -> 'pipe:[545615]'
lrwx------ 1 adrians adrians 64 Mar 12 21:36 1 -> /dev/pts/0
lrwx------ 1 adrians adrians 64 Mar 12 21:36 2 -> /dev/pts/0