07-01-2008
File handling, getopts command in unix
I need to create a shell script having the menu with few options such as
1. Listing 2. Change permissions 3. Modify Contents 4. Delete Files 5. Exit
1. For 1. Listing: Display a special listing of files showing their date of modification and access time (side by side) along with their permissions, sizes and filenames. The script should accept any number of arguments to display a selective listing and should abort if no filenames are specified as arguments. Provide headers for the columns and take care of all validations.
Note: Files have to be searched in present working directory only
2. For 2. Change permissions: Accept files and the permissions to be made available. Change the permissions accordingly.
3. For 3. Modify Contents: Accept a file name and use any editor to modify the contents as per user's choice
Note: Consider only .txt files, else modifying contents of binary files will lead to them being corrupted. So, exit if file is not a .txt file.
4. For 4. Delete Files: Accept a file name(s) and delete the file if available, else display error message
5. For 5. Exit : Exit the application
6. For implementing these options use getopts command appropriately.
can some one help me ?
Thanks in advance
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LEARN ABOUT DEBIAN
blockdiag
BLOCKDIAG(1) General Commands Manual BLOCKDIAG(1)
NAME
blockdiag - generate block-diagram image file from spec-text file.
SYNOPSIS
blockdiag [options] file
DESCRIPTION
This manual page documents briefly the blockdiag commands.
blockdiag is a program that generate block-diagram image file from spec-text file.
OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is
included below. For a complete description, see the SEE ALSO.
--version
show program's version number and exit
-h, --help
Show summary of options
-a, --antialias
Pass diagram image to anti-alias filter
-c FILE, --config=FILE
read configurations from FILE
-o FILE
write diagram to FILE
-f FONT, --font=FONT
use FONT to draw diagram
--fontmap=FONT
use FONTMAP file to draw diagram
-s, --separate
Separate diagram images for each group
-T TYPE
Output diagram as TYPE format
--nodoctype
Do not output doctype definition tags (SVG only)
--no-transparency
do not make transparent background of diagram (PNG only)
SEE ALSO
The programs are documented fully by
http://tk0miya.bitbucket.org/blockdiag/build/html/index.html
AUTHOR
blockdiag was written by Takeshi Komiya <i.tkomiya@gmail.com>
This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others).
May 9, 2011 BLOCKDIAG(1)