12. Processes and Interprocess Communication
Tcl provides several commands for dealing with processes. You can create new processes with the exec command, or you can create new processes with open and then use file I/O commands to communicate with them. Tcl also supports interprocess communication via TCP/IP sockets. You can access process identifiers with the pid command. You can read and write environment variables using the env variable, and you can terminate the current process with the exit command.
12.1 Commands Presented in This Chapter
This chapter discusses the following commands related to process control and interprocess communication:
• exec ?-keepnewline? ?-ignorestderr? ?--? arg ?arg ...?
Executes the command pipeline specified ...
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