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Top Forums UNIX for Dummies Questions & Answers [Solved] Calculation on sun again Post 302734533 by fpmurphy on Thursday 22nd of November 2012 09:08:41 AM
Old 11-22-2012
You seem to be mixing up old and modern bash or ksh93 scripting integer syntax. I suggest you stick to modern syntax. Also make sure that you have a appropriate shebang as the first line of your script.

Code:
$ a=0
$ b=40000
$ c=10000
$ a=$(( b - c ))
$ echo $a
30000
$ d=$(( a - 10000 ))
$ echo $d
20000
$ d=$(( a - 50000 ))
$ echo $d
-20000
$ if (( d > 0 ))
> then
> echo "greater"
> fi
$

 

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POSIX_SETUID(3) 							 1							   POSIX_SETUID(3)

posix_setuid - Set the UID of the current process

SYNOPSIS
bool posix_setuid (int $uid) DESCRIPTION
Set the real user ID of the current process. This is a privileged function that needs appropriate privileges (usually root) on the system to be able to perform this function. PARAMETERS
o $uid - The user id. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 posix_setuid(3) example This example will show the current user id and then set it to a different value. <?php echo posix_getuid()." "; //10001 echo posix_geteuid()." "; //10001 posix_setuid(10000); echo posix_getuid()." "; //10000 echo posix_geteuid()." "; //10000 ?> SEE ALSO
posix_setgid(3), posix_seteuid(3), posix_getuid(3), posix_geteuid(3). PHP Documentation Group POSIX_SETUID(3)
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