/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "lp.cdefs.h"           /* A cross-platform version of <sys/cdefs.h> */
/*
 * Spool Queue examination program
 *
 * lpq [-a] [-l] [-Pprinter] [user...] [job...]
 *
 * -a show all non-null queues on the local machine
 * -l long output
 * -P used to identify printer as per lpr/lprm
 */

#include <sys/param.h>

#include <ctype.h>
#include <dirent.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <unistd.h>

#include "lp.h"
#include "lp.local.h"
#include "pathnames.h"

int      requ[MAXREQUESTS];     /* job number of spool entries */
int      requests;              /* # of spool requests */
char    *user[MAXUSERS];        /* users to process */
int      users;                 /* # of users in user array */

uid_t   uid, euid;

static int       ckqueue(const struct printer *_pp);
static void      usage(void);
int              main(int _argc, char **_argv);

int
main(int argc, char **argv)
{
        int ch, aflag, lflag;
        const char *printer;
        struct printer myprinter, *pp = &myprinter;

        printer = NULL;
        euid = geteuid();
        uid = getuid();
        PRIV_END
        progname = *argv;
        if (gethostname(local_host, sizeof(local_host)))
                err(1, "gethostname");
        openlog("lpd", 0, LOG_LPR);

        aflag = lflag = 0;
        while ((ch = getopt(argc, argv, "alP:")) != -1)
                switch((char)ch) {
                case 'a':
                        ++aflag;
                        break;
                case 'l':                       /* long output */
                        ++lflag;
                        break;
                case 'P':               /* printer name */
                        printer = optarg;
                        break;
                case '?':
                default:
                        usage();
                }

        if (!aflag && printer == NULL && (printer = getenv("PRINTER")) == NULL)
                printer = DEFLP;

        for (argc -= optind, argv += optind; argc; --argc, ++argv)
                if (isdigit(argv[0][0])) {
                        if (requests >= MAXREQUESTS)
                                fatal(0, "too many requests");
                        requ[requests++] = atoi(*argv);
                }
                else {
                        if (users >= MAXUSERS)
                                fatal(0, "too many users");
                        user[users++] = *argv;
                }

        if (aflag) {
                int more, status;

                more = firstprinter(pp, &status);
                if (status)
                        goto looperr;
                while (more) {
                        if (ckqueue(pp) > 0) {
                                printf("%s:\n", pp->printer);
                                displayq(pp, lflag);
                                printf("\n");
                        }
                        do {
                                more = nextprinter(pp, &status);
looperr:
                                switch (status) {
                                case PCAPERR_TCOPEN:
                                        printf("warning: %s: unresolved "
                                               "tc= reference(s) ",
                                               pp->printer);
                                case PCAPERR_SUCCESS:
                                        break;
                                default:
                                        fatal(pp, "%s", pcaperr(status));
                                }
                        } while (more && status);
                }
        } else {
                int status;

                init_printer(pp);
                status = getprintcap(printer, pp);
                if (status < 0)
                        fatal(pp, "%s", pcaperr(status));

                displayq(pp, lflag);
        }
        exit(0);
}

static int
ckqueue(const struct printer *pp)
{
        register struct dirent *d;
        DIR *dirp;
        char *spooldir;

        spooldir = pp->spool_dir;
        if ((dirp = opendir(spooldir)) == NULL)
                return (-1);
        while ((d = readdir(dirp)) != NULL) {
                if (d->d_name[0] != 'c' || d->d_name[1] != 'f')
                        continue;       /* daemon control files only */
                closedir(dirp);
                return (1);             /* found something */
        }
        closedir(dirp);
        return (0);
}

static void
usage(void)
{
        fprintf(stderr,
        "usage: lpq [-a] [-l] [-Pprinter] [user ...] [job ...]\n");
        exit(1);
}