xref: /csrg-svn/usr.sbin/lpr/lpc/cmds.c (revision 13168)

#ifndef lint
static char sccsid[] = "@(#)cmds.c	4.5 (Berkeley) 06/17/83";
#endif

/*
 * lpc -- line printer control program
 */

#include "lp.h"

/*
 * kill an existing daemon and disable printing.
 */
abort(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printf("Usage: abort {all | printer ...}\n");
		return;
	}
	if (argc == 2 && !strcmp(argv[1], "all")) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			abortpr();
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		abortpr();
	}
}

abortpr()
{
	register FILE *fp;
	struct stat stbuf;
	int pid, fd;

	bp = pbuf;
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = DEFSPOOL;
	if ((LO = pgetstr("lo", &bp)) == NULL)
		LO = DEFLOCK;
	(void) sprintf(line, "%s/%s", SD, LO);
	printf("%s:\n", printer);

	/*
	 * Turn on the owner execute bit of the lock file to disable printing.
	 */
	if (stat(line, &stbuf) >= 0) {
		if (chmod(line, (stbuf.st_mode & 0777) | 0100) < 0)
			printf("\tcannot disable printing\n");
		else
			printf("\tprinting disabled\n");
	} else if (errno == ENOENT) {
		if ((fd = open(line, O_WRONLY|O_CREAT, 0760)) < 0)
			printf("\tcannot create lock file\n");
		else {
			(void) close(fd);
			printf("\tprinting disabled\n");
			printf("\tno daemon to abort\n");
		}
		return;
	} else {
		printf("\tcannot stat lock file\n");
		return;
	}
	/*
	 * Kill the current daemon to stop printing now.
	 */
	if ((fp = fopen(line, "r")) == NULL) {
		printf("\tcannot open lock file\n");
		return;
	}
	if (!getline(fp) || flock(fileno(fp), LOCK_SH|LOCK_NB) == 0) {
		(void) fclose(fp);	/* unlocks as well */
		printf("\tno daemon to abort\n");
		return;
	}
	(void) fclose(fp);
	if (kill(pid = atoi(line), SIGINT) < 0)
		printf("\tWarning: daemon (pid %d) not killed\n", pid);
	else
		printf("\tdaemon (pid %d) killed\n", pid);
}

/*
 * Remove all spool files and temporaries from the spooling area.
 */
clean(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printf("Usage: clean {all | printer ...}\n");
		return;
	}
	if (argc == 2 && !strcmp(argv[1], "all")) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			cleanpr();
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		cleanpr();
	}
}

cleanpr()
{
	register int c;
	register DIR *dirp;
	register struct direct *dp;
	char *cp, *cp1;

	bp = pbuf;
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = DEFSPOOL;
	for (cp = line, cp1 = SD; *cp++ = *cp1++; );
	cp[-1] = '/';
	printf("%s:\n", printer);

	if ((dirp = opendir(SD)) == NULL) {
		printf("\tcannot examine spool directory\n");
		return;
	}
	while ((dp = readdir(dirp)) != NULL) {
		c = dp->d_name[0];
		if ((c == 'c' || c == 't' || c == 'd') && dp->d_name[1]=='f') {
			strcpy(cp, dp->d_name);
			if (unlink(line) < 0)
				printf("\tcannot remove %s\n", line);
			else
				printf("\tremoved %s\n", line);
		}
	}
	closedir(dirp);
}

/*
 * Enable queuing to the printer (allow lpr's).
 */
enable(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printf("Usage: enable {all | printer ...}\n");
		return;
	}
	if (argc == 2 && !strcmp(argv[1], "all")) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			enablepr();
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		enablepr();
	}
}

enablepr()
{
	struct stat stbuf;

	bp = pbuf;
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = DEFSPOOL;
	if ((LO = pgetstr("lo", &bp)) == NULL)
		LO = DEFLOCK;
	(void) sprintf(line, "%s/%s", SD, LO);
	printf("%s:\n", printer);

	/*
	 * Turn off the group execute bit of the lock file to enable queuing.
	 */
	if (stat(line, &stbuf) >= 0) {
		if (chmod(line, stbuf.st_mode & 0767) < 0)
			printf("\tcannot enable queuing\n");
		else
			printf("\tqueuing enabled\n");
	}
}

/*
 * Disable queuing.
 */
disable(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printf("Usage: disable {all | printer ...}\n");
		return;
	}
	if (argc == 2 && !strcmp(argv[1], "all")) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			disablepr();
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		disablepr();
	}
}

disablepr()
{
	register int fd;
	struct stat stbuf;

	bp = pbuf;
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = DEFSPOOL;
	if ((LO = pgetstr("lo", &bp)) == NULL)
		LO = DEFLOCK;
	(void) sprintf(line, "%s/%s", SD, LO);
	printf("%s:\n", printer);
	/*
	 * Turn on the group execute bit of the lock file to disable queuing.
	 */
	if (stat(line, &stbuf) >= 0) {
		if (chmod(line, (stbuf.st_mode & 0777) | 010) < 0)
			printf("\tcannot disable queuing\n");
		else
			printf("\tqueuing disabled\n");
	} else if (errno == ENOENT) {
		if ((fd = open(line, O_WRONLY|O_CREAT, 0670)) < 0)
			printf("\tcannot create lock file\n");
		else {
			(void) close(fd);
			printf("\tqueuing disabled\n");
		}
		return;
	} else
		printf("\tcannot stat lock file\n");
}

/*
 * Exit lpc
 */
quit(argc, argv)
	char *argv[];
{
	exit(0);
}

/*
 * Startup the daemon.
 */
restart(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printf("Usage: restart {all | printer ...}\n");
		return;
	}
	gethostname(host, sizeof(host));
	if (argc == 2 && !strcmp(argv[1], "all")) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			startpr(0);
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		startpr(0);
	}
}

/*
 * Enable printing on the specified printer and startup the daemon.
 */
start(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printf("Usage: start {all | printer ...}\n");
		return;
	}
	gethostname(host, sizeof(host));
	if (argc == 2 && !strcmp(argv[1], "all")) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			startpr(1);
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		startpr(1);
	}
}

startpr(enable)
{
	struct stat stbuf;

	bp = pbuf;
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = DEFSPOOL;
	if ((LO = pgetstr("lo", &bp)) == NULL)
		LO = DEFLOCK;
	(void) sprintf(line, "%s/%s", SD, LO);
	printf("%s:\n", printer);

	/*
	 * Turn off the owner execute bit of the lock file to enable printing.
	 */
	if (enable && stat(line, &stbuf) >= 0) {
		if (chmod(line, stbuf.st_mode & 0677) < 0)
			printf("\tcannot enable printing\n");
		else
			printf("\tprinting enabled\n");
	}
	if (!startdaemon(host))
		printf("\tcouldn't start daemon\n");
	else
		printf("\tdaemon started\n");
}

/*
 * Print the status of each queue listed or all the queues.
 */
status(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			prstat();
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		prstat();
	}
}

/*
 * Print the status of the printer queue.
 */
prstat()
{
	struct stat stbuf;
	register int fd, i;
	register struct direct *dp;
	DIR *dirp;

	bp = pbuf;
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = DEFSPOOL;
	if ((LO = pgetstr("lo", &bp)) == NULL)
		LO = DEFLOCK;
	if ((ST = pgetstr("st", &bp)) == NULL)
		ST = DEFSTAT;
	printf("%s:\n", printer);
	(void) sprintf(line, "%s/%s", SD, LO);
	if (stat(line, &stbuf) >= 0) {
		printf("\tqueuing is %s\n",
			(stbuf.st_mode & 010) ? "disabled" : "enabled");
		printf("\tprinting is %s\n",
			(stbuf.st_mode & 0100) ? "disabled" : "enabled");
	} else {
		printf("\tqueuing is enabled\n");
		printf("\tprinting is enabled\n");
	}
	if ((dirp = opendir(SD)) == NULL) {
		printf("\tcannot examine spool directory\n");
		return;
	}
	i = 0;
	while ((dp = readdir(dirp)) != NULL) {
		if (*dp->d_name == 'c' && dp->d_name[1] == 'f')
			i++;
	}
	closedir(dirp);
	if (i == 0)
		printf("\tno entries\n");
	else if (i == 1)
		printf("\t1 entry in spool area\n");
	else
		printf("\t%d entries in spool area\n", i);
	fd = open(line, O_RDONLY);
	if (fd < 0 || flock(fd, LOCK_SH|LOCK_NB) == 0) {
		(void) close(fd);	/* unlocks as well */
		printf("\tno daemon present\n");
		return;
	}
	(void) close(fd);
	putchar('\t');
	(void) sprintf(line, "%s/%s", SD, ST);
	fd = open(line, O_RDONLY);
	if (fd >= 0) {
		(void) flock(fd, LOCK_SH);
		while ((i = read(fd, line, sizeof(line))) > 0)
			(void) fwrite(line, 1, i, stdout);
		(void) close(fd);	/* unlocks as well */
	}
}

/*
 * Stop the specified daemon after completing the current job and disable
 * printing.
 */
stop(argc, argv)
	char *argv[];
{
	register int c, status;
	register char *cp1, *cp2;
	char prbuf[100];

	if (argc == 1) {
		printf("Usage: stop {all | printer ...}\n");
		return;
	}
	if (argc == 2 && !strcmp(argv[1], "all")) {
		printer = prbuf;
		while (getprent(line) > 0) {
			cp1 = prbuf;
			cp2 = line;
			while ((c = *cp2++) && c != '|' && c != ':')
				*cp1++ = c;
			*cp1 = '\0';
			stoppr();
		}
		return;
	}
	while (--argc) {
		printer = *++argv;
		if ((status = pgetent(line, printer)) < 0) {
			printf("cannot open printer description file\n");
			continue;
		} else if (status == 0) {
			printf("unknown printer %s\n", printer);
			continue;
		}
		stoppr();
	}
}

stoppr()
{
	register int fd;
	struct stat stbuf;

	bp = pbuf;
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = DEFSPOOL;
	if ((LO = pgetstr("lo", &bp)) == NULL)
		LO = DEFLOCK;
	(void) sprintf(line, "%s/%s", SD, LO);
	printf("%s:\n", printer);

	/*
	 * Turn on the owner execute bit of the lock file to disable printing.
	 */
	if (stat(line, &stbuf) >= 0) {
		if (chmod(line, (stbuf.st_mode & 0777) | 0100) < 0)
			printf("\tcannot disable printing\n");
		else
			printf("\tprinting disabled\n");
	} else if (errno == ENOENT) {
		if ((fd = open(line, O_WRONLY|O_CREAT, 0760)) < 0)
			printf("\tcannot create lock file\n");
		else {
			(void) close(fd);
			printf("\tprinting disabled\n");
		}
	} else
		printf("\tcannot stat lock file\n");
}