If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript.
|-a||Append the output to file or typescript, retaining the prior contents.|
|Run the COMMAND rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves differently when its stdout is not a tty.|
|-f||Flush output after each write. This is nice for telecooperation: One person does mkfifo foo; script -f foo and another can supervise real-time what is being done using cat foo.|
|-t||Output timing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays.|
The script ends when the forked shell exits (a control-D to exit the Bourne shell ( sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)).
Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal.
|SHELL||If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically).|