lib/lp/which.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1993 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


#pragma ident   "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.9   */
/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */

#include "ctype.h"
#include "string.h"
#include "stdlib.h"
#include "unistd.h"

#include "lp.h"

/**
 ** isprinter() - SEE IF ARGUMENT IS A REAL PRINTER
 **/

int
#if defined(__STDC__)
isprinter (
    char *          str
)
#else
isprinter (str)
    char            *str;
#endif
{
    char            *path   = 0;

    int         bool;

    bool = (
        str
         && *str
         && (path = getprinterfile(str, CONFIGFILE))
         && Access(path, F_OK) == 0
    );
    if (path)
        Free (path);
    return (bool);
}

/**
 ** isclass() - SEE IF ARGUMENT IS A REAL CLASS
 **/

int
#if defined(__STDC__)
isclass (
    char *          str
)
#else
isclass (str)
    char            *str;
#endif
{
    char            *path   = 0;

    int         bool;

    bool = (
        str
         && *str
         && (path = getclassfile(str))
         && Access(path, F_OK) == 0
    );
    if (path)
        Free (path);
    return (bool);
}

/**
 ** isrequest() - SEE IF ARGUMENT LOOKS LIKE A REAL REQUEST
 **/

int
#if defined(__STDC__)
isrequest (
    char *          str
)
#else
isrequest (str)
    char            *str;
#endif
{
    char            *dashp;

    /*
     * Valid print requests have the form
     *
     *  dest-NNN
     *
     * where ``dest'' looks like a printer or class name.
     * An earlier version of this routine checked to see if
     * the ``dest'' was an EXISTING printer or class, but
     * that caused problems with valid requests moved from
     * a deleted printer or class (the request ID doesn't
     * change in the new LP).
     */

    if (!str || !*str)
        return (0);

    if (!(dashp = strrchr(str, '-')))
        return (0);

    if (dashp == str)
        return(0);

    *dashp = 0;
    if (!syn_name(str)) {
        *dashp = '-';
        return (0);
    }
    *dashp++ = '-';

    if (!isnumber(dashp))
        return (0);

    return (1);
}

int
#if defined(__STDC__)
isnumber (
    char *          s
)
#else
isnumber (s)
    char            *s;
#endif
{
    register int        c;

    if (!s || !*s)
        return (0);
    while ((c = *(s++)) != '\0')
        if (!isdigit(c))
            return (0);
    return (1);
}