/bin/bashsleep3&sleep30&sleep5&wait-necho"First job completed."waitecho"All jobs completed." When the script is executed, it spawns 3 background processes. wait -n pauses until the first job is completed and the echo statement is printed. wait pauses for all child background jobs to ...
We use the wait command to specify when a script’s background process must start processing. In the following bash script, we have used the echo command which prints the statement “Background Process” which means that the background process is processing. With this echo command, we have u...
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The Bash shell is one of most widely used shells in Unix/Linux environment. One of its most useful commands is wait command. In this article, we will explore Bash wait command and its usage with examples. Advertisement - This is a modal window. No compatible source was found for this med...
returns the exit status of the child. This consists of the least significant 8 bits of thestatusargument that the child specified in a call toexit(3) or_exit(2) or as the argument for a return statement in main(). This macro should be employed only ifWIFEXITEDreturned true. ...
这类SQL 容易让人产生错觉,例如:update A set ... where ...in (select B)这类级联更新,不仅会占用 A 表上的行锁,也会占用 B 表上的行锁,当 SQL 执行较久时,很容易引起 B 表上的行锁等待。 5. 磁盘问题导致的事务挂起 极少出现的情形,比如存储突然离线,SQL 执行会卡在内核调用磁盘的步骤上,一直等...
(in between 1 to 50) from command line create a new process by fork code. The sum of two integers by the child process and print the resultNoteThese should not be any print statement in child #include <stdio. h> #include <stdlib.h> Main (int argc, char ** arg v) { If (arg ...
returns the exit status of the child. This consists of the least significant 8 bits of the status argument that the child specified in a call to exit(3) or _exit(2) or as the argument for a return statement in main(). This macro should be employed only if WIFEXITED returned true. ...
一、Thread.sleep(long)与object.wait()/object.wait(long)的区别 sleep(long)与wait()/wait(long)行为上有些类似,主要区别如下: 1.Thread.sleep(long)是属于Thread类的静态方法。其基本语义是使当前运行的线程暂停一段时间。实现细节是把当前线程放入就绪线程队列中,直到睡眠时间到期才可被调度为执行线程(在时间...