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Shell Programming and Scripting
Difficult problem: Complex text file manipulation in bash script.
Post 302556854 by tinman47 on Tuesday 20th of September 2011 12:07:47 AM
09-20-2011
Difficult problem: Complex text file manipulation in bash script.
I don't know if this is a big issue or not, but I'm having difficulties. I apoligize for the upcoming essay 
.
I'm writing a script, similar to a paint program that edits images, but in the form of ANSI block characters. The program so far is working. I managed to save the image into a file, but its unformatted, so Here's where I can't find a solution:
How could I save output thats already on the screen into a file?
If that can't be done, how would I be able to interactively edit the text file through the script, like move up a line or left or right for example, and delete or add a character in the file while the script is running?
All help is appreciated.
.I'm writing a script, similar to a paint program that edits images, but in the form of ANSI block characters. The program so far is working. I managed to save the image into a file, but its unformatted, so Here's where I can't find a solution:
How could I save output thats already on the screen into a file?
If that can't be done, how would I be able to interactively edit the text file through the script, like move up a line or left or right for example, and delete or add a character in the file while the script is running?
All help is appreciated.
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LEARN ABOUT SUNOS
script
script(1) User Commands script(1) NAME
script - make record of a terminal session SYNOPSIS
script [-a] [filename] DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the record is saved in the file typescript. See WARNINGS. The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends when the forked shell exits or when Control-d is typed. OPTIONS
The following option is supported: -a Appends the session record to filename, rather than overwriting it. NOTES
script places everything that appears on the screen in filename, including prompts. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a privileged user, that is, root. Be sure that typescript is not a link before running script. SunOS 5.10 30 Jan 2004 script(1)