Shell Programming and Scripting

Code:
DD=${ddmm%/*}
MM=${ddmm#*/}
hh=${hhmmss%%:*}
mmss=${hhmmss#*:}
mm=${mmss%:*}
ss=${mmss##*:}
echo $DD-$MM $hh:$mm:$ss
So now you have it separated into parts. So now you just have to figure out if it's valid:

Code:
let invalid=0
case $MM in
02)
test $DD -le 29 || invalid=1 ;;
0[469]|11)
test $DD -le 30 || invalid=1 ;;
0[13578]|1[02])
test $DD -le 31 || invalid=1 ;;
*)
invalid=1 ;;
esac

I tested this procedure and it don't make the reqirured proccess ,duplicated the month and the day in one variable.

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I have red this:
#!/usr/bin/ksh

string="abc@hotmail.com;xyz@gmail.com;uvw@yahoo.com"

oIFS="$IFS"; IFS=';'
set -A str $string
IFS="$oIFS"

echo "strings count = ${#str[@]}"
echo "first : ${str[0]}";
echo "second: ${str[1]}";
echo "third : ${str[2]}";

And i need to split a date and time in the following patern: 21/04 14:19:30 to 21 ,04 ,14, 19 ,30, but i don't want to use
oIFS="$IFS"; IFS=';'
and
IFS="$oIFS"
How can i do it?

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I have red this:
#!/usr/bin/ksh

string="abc@hotmail.com;xyz@gmail.com;uvw@yahoo.com"

oIFS="$IFS"; IFS=';'
set -A str $string
IFS="$oIFS"

echo "strings count = ${#str[@]}"
echo "first : ${str[0]}";
echo "second: ${str[1]}";
echo "third : ${str[2]}";

And i need to split a date and time in the following patern: 21/04 14:19:30 to 21 ,04 ,14, 19 ,30, but i don't want to use
oIFS="$IFS"; IFS=';'
and
IFS="$oIFS"
How can i do it?

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Try...

Code:

$ echo '21/04 14:19:30' | awk 'BEGIN{FS="[^0-9]";OFS=", "};$1=$1'
21, 04, 14, 19, 30

Also...

Code:

$ if touch -t $(echo '21/04 14:19:30' | tr -dc "[0-9]") file1 2> /dev/null; then echo okay; else echo not valid; fi
okay

Again how can i split a tring to sub strings when the string for example is 21/4 to 21 ,4 and 14:20:06 to 14 20 06?

Code:

echo "21/04/2009 14:20:06" | awk -F"[:/]" '{ print $1 }'

That is the case in direction for the last replay i want a shell script to get from the user when it is called at least two strings then in the script pass it over to a awk script and to check how many arguments have been passed.
I use awk -F"[: /:]" to seperate the string that have been passed by the user to sub strings ,and i think using them in the awk script is ok of $1,$2...
How can i do it?