root@OpenWrt-1:/proc/3699/fd# ls -dl /proc/*/fd/* | grep 1528773
ls: /proc/5636/fd/10: No such file or directory
ls: /proc/5636/fd/3: No such file or directory
ls: /proc/5636/fd/4: No such file or directory
ls: /proc/self/fd/10: No such file or directory
ls: /proc/self/fd/3: No such file or directory
ls: /proc/self/fd/4: No such file or directory
ls: /proc/thread-self/fd/10: No such file or directory
ls: /proc/thread-self/fd/3: No such file or directory
ls: /proc/thread-self/fd/4: No such file or directory
lrwx------    1 root     root            64 May 16 11:51 /proc/3670/fd/1 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3670/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:41 /proc/3670/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:41 /proc/3670/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3670/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 12:41 /proc/3670/fd/14 -> pipe:[15287739]
lrwx------    1 root     root            64 May 16 12:41 /proc/3670/fd/16 -> pipe:[15287739]
l-wx------    1 root     root            64 May 16 12:41 /proc/3670/fd/2 -> pipe:[15287737]
lr-x------    1 root     root            64 May 16 11:51 /proc/3699/fd/0 -> pipe:[15287737]
lrwx------    1 root     root            64 May 16 12:40 /proc/3699/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:40 /proc/3699/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:40 /proc/3699/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:40 /proc/3699/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 12:41 /proc/3700/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:41 /proc/3700/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:41 /proc/3700/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3700/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 12:41 /proc/3700/fd/14 -> pipe:[15287739]
lrwx------    1 root     root            64 May 16 12:37 /proc/3704/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:37 /proc/3704/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:37 /proc/3704/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:37 /proc/3704/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 11:52 /proc/3704/fd/14 -> pipe:[15287739]
l-wx------    1 root     root            64 May 16 12:37 /proc/3704/fd/2 -> pipe:[15287737]
lrwx------    1 root     root            64 May 16 11:52 /proc/3716/fd/1 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:41 /proc/3716/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:41 /proc/3716/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:41 /proc/3716/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3716/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 12:41 /proc/3716/fd/14 -> pipe:[15287739]
lrwx------    1 root     root            64 May 16 12:41 /proc/3716/fd/15 -> pipe:[15287739]
l-wx------    1 root     root            64 May 16 12:41 /proc/3716/fd/2 -> pipe:[15287737]
lrwx------    1 root     root            64 May 16 12:41 /proc/3718/fd/1 -> pipe:[15287739]
lrwx------    1 root     root            64 May 16 12:41 /proc/3718/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:41 /proc/3718/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:41 /proc/3718/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3718/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 12:41 /proc/3718/fd/14 -> pipe:[15287739]
l-wx------    1 root     root            64 May 16 12:41 /proc/3718/fd/2 -> pipe:[15287737]
lrwx------    1 root     root            64 May 16 11:56 /proc/3722/fd/1 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3722/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:41 /proc/3722/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:41 /proc/3722/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3722/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 12:41 /proc/3722/fd/14 -> pipe:[15287739]
lrwx------    1 root     root            64 May 16 12:41 /proc/3722/fd/17 -> pipe:[15287739]
l-wx------    1 root     root            64 May 16 12:41 /proc/3722/fd/2 -> pipe:[15287737]
lrwx------    1 root     root            64 May 16 12:41 /proc/3723/fd/10 -> pipe:[15287730]
lrwx------    1 root     root            64 May 16 12:41 /proc/3723/fd/11 -> pipe:[15287734]
lrwx------    1 root     root            64 May 16 12:41 /proc/3723/fd/12 -> pipe:[15287735]
lrwx------    1 root     root            64 May 16 12:41 /proc/3723/fd/13 -> pipe:[15287736]
lrwx------    1 root     root            64 May 16 12:41 /proc/3723/fd/14 -> pipe:[15287739]
lrwx------    1 root     root            64 May 16 12:41 /proc/3723/fd/16 -> pipe:[15287739]
l-wx------    1 root     root            64 May 16 12:41 /proc/3723/fd/2 -> pipe:[15287737]