8.13.1 Template Objects
Template objects following methods:
- reset()
- Restore a pipeline template to its initial state.
- clone()
- Return a new, equivalent, pipeline template.
- debug(flag)
-
If flag is true, turn debugging on. Otherwise, turn debugging
off. When debugging is on, commands to be executed are printed, and
the shell is given
set -xcommand to be more verbose.
- append(cmd, kind)
-
Append a new action at the end. The cmd variable must be a valid
bourne shell command. The kind variable consists of two letters.
The first letter can be either of
'-'(which means the command reads its standard input),'f'(which means the commands reads a given file on the command line) or'.'(which means the commands reads no input, and hence must be first.)Similarly, the second letter can be either of
'-'(which means the command writes to standard output),'f'(which means the command writes a file on the command line) or'.'(which means the command does not write anything, and hence must be last.)
- prepend(cmd, kind)
- Add a new action at the beginning. See append() for explanations of the arguments.
- open(file, mode)
-
Return a file-like object, open to file, but read from or
written to by the pipeline. Note that only one of
'r','w'may be given.
- copy(infile, outfile)
- Copy infile to outfile through the pipe.
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Release 2.2, documentation updated on December 21, 2001.