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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?
 
CHSH(1) 							   User Commands							   CHSH(1)

NAME
chsh - change your login shell SYNOPSIS
chsh [-s shell] [-l] [-u] [-v] [username] DESCRIPTION
chsh is used to change your login shell. If a shell is not given on the command line, chsh prompts for one. chsh is used to change local entries only. Use ypchsh, lchsh or any other implementation for non-local entries. OPTIONS
-s, --shell shell Specify your login shell. -l, --list-shells Print the list of shells listed in /etc/shells and exit. -u, --help Print a usage message and exit. -v, --version Print version information and exit. VALID SHELLS
chsh will accept the full pathname of any executable file on the system. However, it will issue a warning if the shell is not listed in the /etc/shells file. On the other hand, it can also be configured such that it will only accept shells listed in this file, unless you are root. EXIT STATUS
Returns 0 if operation was successful, 1 if operation failed or command syntax was not valid. SEE ALSO
login(1), passwd(5), shells(5) AUTHOR
Salvatore Valente <svalente@mit.edu> AVAILABILITY
The chsh command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. util-linux July 2009 CHSH(1)
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