虽然完全不明白为什么有人会需要这样的剧本,我敢肯定比存在更优雅,更更好的/正确的解决方案 - 但确定 - 下一个demostrating如何:
什么打算背景(命名为bgg
)脚本
#!/bin/bash
for i in $(seq 10)
do
echo "bg: $i"
sleep 1
done
read -p 'BGG enter something:' -r data
echo "$0 got: $data"
主脚本(main.sh
)
set -m #this is important
echo "Sending script bgg to background - will cycle 10 secs"
./bgg & 2>/dev/null
echo "Some commands"
date
read -r -p 'main.sh - enter something:' fgdata
echo "Main.sh got: ==$fgdata=="
jnum=$(jobs -l | grep " $! " | sed 's/\[\(.*\)\].*/\1/')
echo "Backgroung job number: $jnum"
echo "Now sleeping 3 sec"
sleep 3
echo "Bringing $jnum to foreground - wait until the BG job will read"
fg $jnum
运行的./main.sh
- ,结果将会像
Sending bgg to background - will cycle 10 secs
Some commands
Mon Mar 3 00:04:57 CET 2014
main.sh - enter something:bg: 1
bg: 2
bg: 3
bg: 4
bg: 5
qqbg: 6
qqqqq
Main.sh got: ==qqqqqqq==
Backgroung job number: 1
Now sleeping 3 sec
bg: 7
bg: 8
bg: 9
Bringing 1 to foreground - wait until the BG job will read
./bgg
bg: 10
BGG enter something:wwwwwww
./bgg got: wwwwwww
如果节目x是要求用户输入的,它应该在终端显示尽管上x在后台运行。 – Amit