Shell procedures

Shell procedures

From Steve Parker

The shell may be used to read and execute commands contained in a file. For example,

	sh file [ args ... ]

calls the shell to read commands from file. Such a file is called a command procedure or shell procedure. Arguments may be supplied with the call and are referred to in file using the positional parameters $1, $2, .... For example, if the file wg contains

	who | grep $1

then

	sh wg fred

is equivalent to

	who | grep fred