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This article mainly shows you "how to achieve BASH multi-process parallel processing in Linux", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to achieve BASH multi-process parallel processing in Linux" this article.

The code is as follows:

#! / bin/bash

SEND_THREAD_NUM=13

The ID number of the current process that the tmp_fifofile= "/ tmp/$$.fifo" # script runs as the file name

Mkfifo "$tmp_fifofile" # create a new random fifo pipeline file

Exec 6 "$tmp_fifofile" # definition file descriptor 6 points to this fifo pipeline file

Rm $tmp_fifofile

For ((iTuno)

For i in `seq 100`; do # 100th for cycle starts

Read-u6 # reads lines from file descriptor 6 (actually points to the fifo pipe)

{

Echo $I # print I

Sleep 3 # pause for 3 seconds

Echo > & 6 # writes a blank line to the fifo pipe file again.

} &

# {} this part of the statement is executed as a child process in the background, so you don't have to wait 3 seconds at a time.

# next, this part of the echo $I is completed almost at the same time, and the for loop is completed when the 13 blank lines in the fifo are read.

# continue to wait for the fifo data to be read in read, and when the 13 sub-processes in the background wait for 3 seconds, in order

# queue to enter blank lines into fifo, so that there is data in fifo again, and the for statement continues to execute

Id printing! # print the last child process to enter the background

Echo $pid

Done

Wait

Exec 6 > &-# Delete file descriptor 6

Exit 0

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