jumo process control

function wait and waitpidBlog Link: Orphan process and zombie process [summary] 1 #include 2 #include 34 pid_t wait (int *status); 5 6 int int options);PID: It is divided into four cases: PID Parameters Explain For any one of the subprocess in the process group that belongs to the absolute value of the

So far, our programs can only be executed in the order in which they are written, and no change can take place halfway. However, not all things in real life are carried out in a step-by-step manner, as is the procedure. In order to adapt to their needs, we often have to transfer or change the sequence of program execution, the statement to achieve these goals is called Process Control statements. Similar

Shell Process ControlUnlike Java, PHP and other languages, SH's process control is not empty, such as (the following is the PHP Process Control notation):phpif(isset($_get["Q"])){ search(q);} else{//Don't do anything } You can't write this in Sh/bash, and if th

Thoughtinshare Source: Http://www.cnblogs.com/thoughtInShare Welcome reprint, Please also keep this statement. Thank you!1, Process Control = sequential Structure + branching structure + loop structure(1) Branch structure =if+switch(2) Loop structure =while+do while () +for(3) Control loop structure =break (end entire cycle) +continue (end this cycle) +return (en

Or this small site project, you need to control an input box of the input content,Record the encoding process here.Demand:Available Input range:A-ZA-Z0-9- / / Short Horizontal Line _ // Short underline . // dots ' // single quotation marktype id maxlength/>The idea is simple to replace the unwanted characters directly in the oninput with regular matches.$ (function() { $(function() { $(this)

The basic state of the process and the three basic states of the conversion processReady to turn State• The process has allocated all the necessary resources other than the processor, as long as the processor is able to perform the state.• Such a process may have more than one, usually lined up as a queue, called the ready queue.Execution status• The CPU has been

Process control can be handled differently depending on the situation, and the specified program area can be executed repeatedly, demonstrating the productivity of the program. In the bash shell, Process Control can be divided into two main categories:"Select" and "cycle";1. Select: If, case, select2. Loop: For, while,

The Linux shell has its own process Control statement, which includes a conditional statement (if), a looping statement (For,while), and a SELECT statement (case). I'll use the example below to illustrate how each statement is used.One, Shell conditional statements (if usage)If statement structure [IF/THEN/ELIF/ELSE/FI]If condition test statementThenAction[Elif ConditionsActionElseAction]FiIf the condition

In the bash shell, there are 2 main classes of Process Control commands: " condition ", " loop ". "Conditions" are: If, case, the "loop" has: for, while, until; command select is both "condition" and "loop". Either way, the condition test is required, and the direction of the program flow is determined according to the test results.The use of these commands is described below.Section One: End state of a com

Nest nestingThe curly braces curly bracesColon syntax colon syntaxPHP Three if the wording of the judgmentWriting one:if (true) {}else if () {}else if () {}else{}Two:if () {}elseif () {}elseif () {}else{}Three:if ():#执行语句ElseIf#执行语句ElseIf#执行语句Else#执行语句endifAlternative syntax for Process ControlPHP provides a number of alternative syntax for process Control,Includ

Tags: Process Control monefaultrestnsa orderprintdatepurge From 3306 Backup database, restore to 3307 database, via shell script for in Process Control implementation #!/bin/bash my_date= ' date +%y%m%d ' my_time= ' date +%h%m ' My_ date_yesterday= ' Date +%y%m%d--date= ' 1 days ago ' echo '-------------------------