help Post: 93055

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

12-15-2005

Registered User

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?

majoy

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LEARN ABOUT X11R4

setsid

SETSID(1)                                                          User Commands                                                         SETSID(1)

NAME

       setsid - run a program in a new session

SYNOPSIS

       setsid [options] program [arguments]

DESCRIPTION

       setsid  runs  a  program in a new session. The command calls fork(2) if already a process group leader. Otherwise, it executes a program in
       the current process.

OPTIONS

       -c, --ctty
              Set the controlling terminal to the current one.

       -w, --wait
              Wait for the execution of the program to end, and return the exit value of this program as the return value of setsid.

       -V, --version
              Display version information and exit.

       -h, --help
              Display help text and exit.

SEE ALSO

       setsid(2)

AUTHOR

       Rick Sladkey <jrs@world.std.com>

AVAILABILITY

       The setsid command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux                                                           July 2014                                                           SETSID(1)