1. #!/usr/bin/env bash
    3. process=${1:-5}
    4. ff=9
    6. function make_fifo()
    7. {
    8.     local num=$1
    9.     tmp_fifofile=/tmp/$$.fifo
    10.     mkfifo $tmp_fifofile
    11.     cmd="exec ${ff}<> $tmp_fifofile"
    12.     eval $cmd
    13.     rm $tmp_fifofile
    14.     for i in `seq $num`
    15.     do
    16.         echo >&${ff}
    17.     done
    18. }
    20. function clean_fifo()
    21. {
    22.     wait # 等待程序
    23.     cmd1="exec ${ff}>&-"
    24.     cmd2="exec ${ff}<&-"
    25.     eval $cmd1
    26.     eval $cmd2
    27. }
    29. function parall_funs()
    30. {
    31.     local funs=$1
    32.     for((i=0;i<10;i++));
    33.     do
    34.         read -u ${ff}
    35.         {
    36.             $funs $i
    37.             cmd="echo >&${ff}"
    38.             eval $cmd
    39.         }&
    40.     done
    42. }
    44. function say()
    45. {
    46.     echo $1
    47.     sleep 1
    48. }
    51. make_fifo $process
    52. parall_funs say
    53. clean_fifo
    56. echo "run end!"