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Operating Systems Linux help Post 93055 by majoy on Thursday 15th of December 2005 06:46:45 AM
Old 12-15-2005
Data help

ey.. i just started learning shell scripting in Mandrake linux... I have a program that will have to accept arguments and do validations if the arguments entered are containing characters other than numeric characters... I was able to detect alphabetic characters and symbols like , + - . etc.... and error messages are displayed. But when arguments containing symbols like * ) [ & ( and other characters which have special meanings, my script is not able to trap them and treat as ordinary strings that are part of my arguments...
to explain more clearly.. here's an example..

# ./sample.sh a677 7 678
--->>> here, a message indicating that the first argument contains a character is displayed. This one works correctly.

# ./sample.sh 344 56& 557
---->>> here's the prob... this time,,, it stops when it reaches the symbol & and displays a message from bash... If I use single ( or ), an error message from bash also displays.

Can anyone help me with this?
 
LINUX-VERSION(1)					      General Commands Manual						  LINUX-VERSION(1)

NAME
linux-version - operate on Linux kernel version strings SYNOPSIS
linux-version compare VERSION1 OP VERSION2 linux-version sort [--reverse] [VERSION1 VERSION2 ...] linux-version list [--paths] DESCRIPTION
linux-version operates on Linux kernel version strings as reported by uname -r and used in file and directory names. These version strings do not follow the same rules as Debian package version strings and should not be compared as such or as arbitrary strings. compare VERSION1 OP VERSION2 Compare version strings, where OP is a binary operator. linux-version returns success (zero result) if the specified condition is satisfied, and failure (nonzero result) otherwise. The valid operators are: lt le eq ne ge gt sort [--reverse] [VERSION1 VERSION2 ...] Sort the given version strings and print them in order from lowest to highest. If the --reverse option is used, print them in order from highest to lowest. If no version strings are given as arguments, the version strings will instead be read from standard input, one per line. They may be suffixed by arbitrary text after a space, which will be included in the output. This means that, for example: linux-version list --paths | linux-version sort --reverse will list the installed versions and corresponding paths in order from highest to lowest version. list [--paths] List kernel versions installed in the customary location. If the --paths option, show the corresponding path for each version. AUTHOR
linux-version and this manual page were written by Ben Hutchings as part of the Debian linux-base package. 30 March 2011 LINUX-VERSION(1)
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