- #!/bin/bash
- #
- CMDS[1]="echo $USER' 01 BEGIN' && sleep 6 && echo $USER' 01 END'"
- CMDS[2]="echo $USER' 02 BEGIN' && sleep 3 && echo $USER' 02 END'"
- CMDS[3]="echo $USER' 03 BEGIN' && sleep 7 && echo $USER' 03 END'"
- CMDS[4]="echo $USER' 04 BEGIN' && sleep 4 && echo $USER' 04 END'"
- CMDS[5]="echo $USER' 05 BEGIN' && sleep 2 && echo $USER' 05 END'"
- CMDS[6]="echo $USER' 06 BEGIN' && sleep 5 && echo $USER' 06 END'"
- N=${#CMDS[@]}
- MAX=3
- PIDS=''
- for I in $(seq $N)
- do
- while [ 1 -gt 0 ]
- do
- C=0
- pids=''
- for PID in $PIDS
- do
- ps $PID >/dev/null 2>/dev/null
- if [ $? -eq 0 ]
- then
- pids="$pids $PID"
- (( C = C + 1 ))
- fi
- done
- PIDS=$pids
- [ $C -lt $MAX ] && break
- sleep 1
- done
- #echo $i ${CMDS[$i]}
- CMD=${CMDS[$I]}
- bash -c "$CMD" &
- PIDS="$PIDS $!"
- done
- wait
- #该片段来自于http://www.codesnippet.cn/detail/250620134279.html
来源: http://www.codesnippet.cn/detail/250620134279.html