parameters

Shell Programming and Scripting
1

I have a script that needs to check if the given parameters are a combination of 0123456789 and not a word or another irelevant character.please help

2 
#!/bin/sh

for vi in "$@"
do
    if [ "`echo $vi | sed 's/^[0-9]*$//'`" != "" ]; then
        echo "ERROR: invalid parameter: "$vi;
    fi
done
3

bash/ksh


a="$*"
if [[ ${#a} -eq $(expr "$a" : '[0-9 ]*') ]] ; then
        echo numbers
else
        echo non-number
fi
4

Another solution (for KSH)

for arg in "$@"
do
   if [[ "$arg" = +([0-9]) ]]
   then
      echo "Valid parameter <$arg>"
   else
      echo "Invalid parameter <$arg>"
   fi
done

Jean-Pierre.

5

is there anything for tcsh please?

6

I'm really not a fan of tcsh, but anyway:

#!/bin/tcsh

set a = "$*"
if ( `expr "$a" : '.*'` == `expr "$a" : '[0-9 ]*'` ) then
    echo numbers
else
    echo non-number
endif
7

Another method(using awk):

for var in $@; do
if [[ `echo $var | awk -v var=${var} 'BEGIN{if(var!~/[[:digit:]]/)print 1;}'` -eq 1 ]]; then
echo "Not a number"
exit 0
fi
done