script exit code

The exit and exit status codes exit are used to end a script, just like in C. it also returns a value, which is passed to the parent process of the script. The parent process uses this value for further processing. each command returns an exit

Exit and exit Status Codes Exit is used to end a script, just like in C. it also returns a value, which is passed to the parent process of the script. The parent process uses this value for further processing. Each command returns an exit status

Linux Shell Bash with special meaning exit code purpose descriptionThe exit command exits the current shell and can terminate the current script execution in a shell script.Common parametersFormat: Exit nExit. Set the exit code to N. (cause the

Linux provides a special variable $ to save the exit status code of the last executed command. For commands that need to be checked, you must view or use the $? variable immediately after it has been run. Its value becomes the exit status code of

For more information about the list of all "script stories" columns, click here. From: http://www.microsoft.com/china/technet/community/columns/scripts/sg0904.mspxContent on this page The worm crawls in, but does not leave.

Original link: http://codingstandards.iteye.com/blog/836625 (reproduced please specify the source)Description of UseThe exit command exits the current shell and can terminate the current script execution in a shell script.Common parametersFormat:

General PracticeCat>test.SH"'#!/bin/Bashexit_script () {Exit1}Echo "before Exit"Exit_scriptEcho "After exit"EOFchmodA+x test.SH./test.SHEcho$?# output before exit1You can see that direct use exit can exit the script, and you can pass the error code

1. Graceful exit of the process 1.1.kill-9 PID problemsIt is easy and efficient to force a process to be killed by Kill-9 PID on Linux, so many program stop scripts often choose how to use the kill-9 PID.Whether the Kill-9 PID of Linux or the

Exit is used to end a script in which the script terminates immediately when the Exit command is encountered, and the terminating exit status depends on the number following the Exit command;Exit [n]: Custom exit status code;An example is described.1

Now I've written a Hello World program to take a look at it: Filename:main.c #include int main (void) { printf ("Hello wolrd!\n"); return (-); } Compile execution: gcc main.c &&/a.out Now let's take a look at the return