http://www.linuxidc.com/Linux/2011-03/33918.htm
一次性并发
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| #!/bin/sh
for ((i=1;i<10;i++))
do
{
echo "run $i "`date +%s`
sleep $i
echo "end $i "`date +%s`
exit 0
} &
done
wait
|
一次性并发forks个，forks个进程都结束后再并发forks个
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| #!/bin/sh
forks=3
n=0
for ((i=1;i<10;i++))
do
{
{
echo "run $i "`date +%s`
sleep $i
echo "end $i "`date +%s`
exit 0
} &
let n=$n+1
if [ $n -eq $forks ]; then
wait
n=0
fi
}
done
wait
|
模拟多线程的一种方法
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| #!/bin/sh
tmp_fifo="/tmp/.tmp_fifo"
mkfifo $tmp_fifo
exec 6<>$tmp_fifo
rm $tmp_fifo
forks=3
for ((i=0;i<$forks;i++))
do
echo >&6
done
for ((i=1;i<10;i++))
do
read -u6
{
echo "run $i "`date +%s`
sleep $i
echo "end $i "`date +%s`
echo >&6
exit 0
} &
done
wait
exec 6>&-
exit 0
|
