Is here anyone who can help me out in C-programming under
SCO-Unix Development

First, I need a funktion or command to read the systemdate and the systemuname.



Thanks

something like this?

hp91>cat showdate.c
#include <stdio.h>
main()
{
char ucmd[100];
sprintf(ucmd,"echo system date is `date`");
system(ucmd);
sprintf(ucmd,"echo hostname is `hostname`");
system(ucmd);
}
================================
hp91>cc showdate.c
hp91>a.out
system date is Wed Mar 3 08:55:36 EST 2004
hostname is hp91

Hi skd,
thanx for your interest to my problem.

It is not the real way that I want to do. I need the result in a variable and not on screen.

I give you some more details.

I wrote a shell script witch bild a number for a second login passwort.
Now a want do do it by a C-programm because other users can not read the opperations in the binary executable file. To build this number I used
the last two digits from uname(allways 1-99 at the end), day, month, year and a fix digit in this vain.

FIX="1234"
UNAME=`uname -n | awk '{
len=length($1)
dummy=substr($1, len-1, 2)
print dummy
}'`
ALGO=$FIX
ALGO=`expr $ALGO * $UNAME `
ALGO=`expr $ALGO * $DAY `
ALGO=`expr $ALGO * $MONTH `
ALGO=`expr $ALGO * $YEAR `
# after this, I take the last digit from $ALGO and divide $ALGO for
# n times whith the value "3" as an integer without floating point
LAST=`echo $ALGO | awk '{
lang=length($1)
dummy=substr($1, lang, 1)
print dummy
}'`

while [ "$LAST" != "0" ]
do
LAST=`expr $LAST - 1 `
ALGO=`expr $ALGO \/ 3 `
done

echo $ALGO > myfile

Why don't you just make the file unreadable for others?
# chmod go-r file
Writing a program in C because it is not immediately readable by humans is (imo, sorry) poor security. There are tools to reverese the compilation process after all.

Hi S_Scheible ,
thanx for answer. The problem is as followed.
If our support team have a shell on systemconsole they can change to root, because they do any administrative workings. The second login passwort only works by using the online shell over modem or ISDN.

I see. Hmm I think you should read
# man 2 time
and the manpages it references. One of the later should be able to format the time as you see fit.

# man 2 uname
should solve the other, uname-related problem.

I was going to suppose sudo, but I guess your support team has to fulfill various administrative tasks, not just a few, so this is not an option.