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Full Discussion: validate number range
Top Forums Shell Programming and Scripting validate number range Post 63120 by zazzybob on Tuesday 22nd of February 2005 08:28:37 PM
Old 02-22-2005
A slight variation on bhargav's script to ensure that only numeric digits are passed, and symbols as well as letters are rejected....
Code:
#!/bin/sh

echo "Enter number"
read val

if echo $val | egrep '^[0-9]+$' >/dev/null 2>&1
then
  if [ $val -ge 1 -a $val -le 100 ]; then
     echo "OK"
  else
     echo "Out of range"
  fi
else
  echo "Not a number"
fi

exit 0

Cheers
ZB
This User Gave Thanks to zazzybob For This Post:
 

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echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME
echo, noecho - enable/disable terminal echo SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib -R /usr/xpg4/lib -lcurses [ library... ] c89 [ flag... ] file... -lcurses [ library... ] #include <curses.h> int echo(void); int noecho(void); DESCRIPTION
The echo() function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially, curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control soft- ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined. RETURN VALUES
Upon successful completion, these functions return OK. Otherwise, they return ERR. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Unsafe | +-----------------------------+-----------------------------+ SEE ALSO
getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5) SunOS 5.11 5 Jun 2002 echo(3XCURSES)
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