#err()

DESCRIPTION
    returns the error value ERR

SYNOPSIS
    #err()

ARGUMENTS
    none

EXAMPLES

        rule    // check validity of fsck pass
                if $fstype eq "ufs"
                        set #fp = #val($fsckpass)
                        if    ( #fp == #err() )
                           || ! =isint(#fp)
                           || #fp !> 0
                                output mail "bad fsck pass: $inlin"
                        fi
                fi

        rule
                =set_hr($inlin)

        ...

        rule    // report corrupted lines, then bypass
                if #hr == #err()
                        output mail $inlin
                        next
                endif

        rule    // for changed scripts, diff and log/mail any changes
                if #popen(DIFF, "=diff $hstfil $fil", "r") != #err()
                        while #read(DIFF) > 0
                                if #doheader
                                        output mail "changes to $fil:"
                                        output log "(L)" "changes to $fil:"
                                        set #doheader = #false()
                                fi
                                output mail $rdlin
                                output log "(L)" $rdlin
                        endwhile
                        do #pclose(DIFF)
                else
                        output mail "can't open process for reading!"
                        quit
                fi

SEE ALSO
    #defined()
    #error()
    #nil()

    Numerical Functions
    String Functions