freebsd/usr.sbin/lpr/lpq/lpq.c

/*-
 * 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);
}