debug mping
my pid is 28139
5 file descriptors:
0 1 2 3 4

spawned ping, pid 28141, fileno 3
spawned ping, pid 28142, fileno 5
spawned ping, pid 28143, fileno 6
spawned 3 ping commands
starting read loop 1
there are 3 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6 7
end read loop 1
there are 3 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6 7
starting read loop 2
there are 3 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6 7
end read loop 2
there are 3 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6 7
starting read loop 3
there are 3 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6 7
end read loop 3
there are 3 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6 7
starting read loop 4
there are 3 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6 7
done reading from pid 28141 fd `3`, closing
close 28141 status: fd: `3`; rv: `1`; $!: ``; $?: 0
end read loop 4
there are 2 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6
starting read loop 5
there are 2 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5 6
done reading from pid 28143 fd `6`, closing
close 28143 status: fd: `6`; rv: `1`; $!: ``; $?: 0
end read loop 5
there are 1 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5
starting read loop 6
there are 1 pings active
fd status from /proc/28139/fd:
0 1 2 3 4 5
done reading from pid 28142 fd `5`, closing
close 28142 status: fd: `5`; rv: `1`; $!: ``; $?: 0
end read loop 6
there are 0 pings active
fd status from /proc/28139/fd:
0 1 2 3 4
status for www.google.com: 0
status for www.slashdot.org: 0
status for localhost: 0