shell script fork

Three different methods (fork, exec, source) fork (/directory/script. sh) fork is the most common, that is, directly using/directory/script in the script. sh to call the script. sh script. run a sub-sh... three different methods (fork, exec, source)

Fork (/directory/script.sh): If the shell contains execution commands, then the subcommand does not affect the parent's commands, and then executes the parent command after the subcommands have finished executing. The children's environment

Original link: http://blog.chinaunix.net/uid-22548820-id-3181798.html Fork (/directory/script.sh): If the shell contains execution commands, the subcommands do not affect the parent's commands. When the subcommand executes and then executes

Three different methods (fork, exec, source) fork (/directory/script. sh) fork is the most common, that is, directly using/directory/script in the script. sh to call the script. sh script. run a sub-shell script to execute the call. When sub-shell

From: http://mindream.wang.blog.163.com/blog/static/2325122220084624318692/Fork (/directory/script. Sh)Fork is the most common. It uses/directory/script. Sh directly in the script to call the script. Sh script.Run a sub-shell script to execute the

Summary: three methods of executing shell scripts, fork, source and exec, are summarized.  Prerequisites 1. any program we run is a child process generated by the parent process. After the child process is completed, it is returned to the parent

What if we wanted to call 1 shell scripts or execute 1 Bash shell commands when we were writing 1 C programs? In fact, the header file contains 1 function system () that calls the shell command or script, and it is convenient to simply pass the

The main following are several ways: Command explanation Fork A new child shell executes, and the child shell can inherit environment variables

I. Basic Shell syntax1. VariablesBy convention, Shell variables are composed of uppercase letters and underscores (_). There are two types of Shell variables:Environment VariableEnvironment variables can be transmitted from the parent process to the

RPM: The difference between fork, source, and exec in LinuxThe shell commands can be divided into internal commands and external commands. Internal commands are implemented by special file formats. Def, such as cd,ls. While external commands are