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August 29, 2015 14:05
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Background FTP session, with processable output
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#!/bin/bash | |
# Make the fifos | |
mgmtFifo="/tmp/.ftp.mgmt.fifo" | |
cmdFifo="/tmp/.ftp.cmd.fifo" | |
outFifo="/tmp/.ftp.out.fifo" | |
mkfifo "$mgmtFifo" | |
mkfifo "$cmdFifo" | |
mkfifo "$outFifo" | |
# We may want a way to echo back for the sub-shell | |
exec 4>&1 | |
# Open fifos with r/w | |
exec 5<>"$mgmtFifo" | |
exec 6<>"$cmdFifo" | |
exec 7<>"$outFifo" | |
# No more stdin (&0) | |
exec 0>&- | |
{ | |
ftp -v example.com <&6 >&7 & | |
while true; do | |
read -u5 mgmtString | |
[[ "$mgmtString" == "exit-subshell" ]] && exit 0 | |
sleep 1 | |
done | |
} & | |
echo "prompt" >&6 | |
echo "ls" >&6 | |
# Process ftp output until we say so | |
startSeen=0 | |
finishedProcessing=0 | |
while [[ "$finishedProcessing" -eq 0 ]]; do | |
read -u7 ftpOutput | |
[[ "$ftpOutput" == "Interactive mode off." ]] && startSeen=1 | |
if [[ "$startSeen" -eq 1 ]]; then | |
if [[ "$ftpOutput" != "226 Directory send OK." ]]; then | |
if [[ ! "$ftpOutput" =~ ^[1-6][0-5][0-9]\ ]]; then | |
filename="$(echo $ftpOutput | cut -d' ' -f9)" | |
echo "$filename" | |
fi | |
else | |
finishedProcessing=1 | |
fi | |
fi | |
done | |
echo "quit" >&6 | |
sleep 1 | |
echo "exit-subshell" >&5 |
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