[unix-history] / usr / src / usr.sbin / lpr / common_source / rmjob.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)rmjob.c	5.5 (Berkeley) %G%";
#endif /* not lint */

/*
 * rmjob - remove the specified jobs from the queue.
 */

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

/*
 * Stuff for handling lprm specifications
 */
extern char	*user[];		/* users to process */
extern int	users;			/* # of users in user array */
extern int	requ[];			/* job number of spool entries */
extern int	requests;		/* # of spool requests */
extern char	*person;		/* name of person doing lprm */

char	root[] = "root";
int	all = 0;		/* eliminate all files (root only) */
int	cur_daemon;		/* daemon's pid */
char	current[40];		/* active control file name */

int	iscf();

rmjob()
{
	register int i, nitems;
	int assasinated = 0;
	struct direct **files;

	if ((i = pgetent(line, printer)) < 0)
		fatal("cannot open printer description file");
	else if (i == 0)
		fatal("unknown printer");
	if ((SD = pgetstr("sd", &bp)) == NULL)
		SD = _PATH_DEFSPOOL;
	if ((LO = pgetstr("lo", &bp)) == NULL)
		LO = DEFLOCK;
	if ((LP = pgetstr("lp", &bp)) == NULL)
		LP = _PATH_DEFDEVLP;
	if ((RP = pgetstr("rp", &bp)) == NULL)
		RP = DEFLP;
	RM = pgetstr("rm", &bp);
	/*
	 * Figure out whether the local machine is the same as the remote 
	 * machine entry (if it exists).  If not, then ignore the local
	 * queue information.
	 */
	 if (RM != (char *) NULL) {
		char name[256];
		struct hostent *hp;

		/* get the standard network name of the local host */
		gethostname(name, sizeof(name));
		name[sizeof(name)-1] = '\0';
		hp = gethostbyname(name);
		if (hp == (struct hostent *) NULL) {
		    printf("unable to get network name for local machine %s",
			name);
		    goto localcheck_done;
		} else strcpy(name, hp->h_name);

		/* get the standard network name of RM */
		hp = gethostbyname(RM);
		if (hp == (struct hostent *) NULL) {
		    printf("unable to get hostname for remote machine %s", RM);
		    goto localcheck_done;
		}

		/* if printer is not on local machine, ignore LP */
		if (strcmp(name, hp->h_name) != 0) *LP = '\0';
	}
localcheck_done:

	/*
	 * If the format was `lprm -' and the user isn't the super-user,
	 *  then fake things to look like he said `lprm user'.
	 */
	if (users < 0) {
		if (getuid() == 0)
			all = 1;	/* all files in local queue */
		else {
			user[0] = person;
			users = 1;
		}
	}
	if (!strcmp(person, "-all")) {
		if (from == host)
			fatal("The login name \"-all\" is reserved");
		all = 1;	/* all those from 'from' */
		person = root;
	}

	if (chdir(SD) < 0)
		fatal("cannot chdir to spool directory");
	if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
		fatal("cannot access spool directory");

	if (nitems) {
		/*
		 * Check for an active printer daemon (in which case we
		 *  kill it if it is reading our file) then remove stuff
		 *  (after which we have to restart the daemon).
		 */
		if (lockchk(LO) && chk(current)) {
			assasinated = kill(cur_daemon, SIGINT) == 0;
			if (!assasinated)
				fatal("cannot kill printer daemon");
		}
		/*
		 * process the files
		 */
		for (i = 0; i < nitems; i++)
			process(files[i]->d_name);
	}
	chkremote();
	/*
	 * Restart the printer daemon if it was killed
	 */
	if (assasinated && !startdaemon(printer))
		fatal("cannot restart printer daemon\n");
	exit(0);
}

/*
 * Process a lock file: collect the pid of the active
 *  daemon and the file name of the active spool entry.
 * Return boolean indicating existence of a lock file.
 */
lockchk(s)
	char *s;
{
	register FILE *fp;
	register int i, n;

	if ((fp = fopen(s, "r")) == NULL)
		if (errno == EACCES)
			fatal("can't access lock file");
		else
			return(0);
	if (!getline(fp)) {
		(void) fclose(fp);
		return(0);		/* no daemon present */
	}
	cur_daemon = atoi(line);
	if (kill(cur_daemon, 0) < 0) {
		(void) fclose(fp);
		return(0);		/* no daemon present */
	}
	for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
		if (i > 5) {
			n = 1;
			break;
		}
		sleep(i);
	}
	current[n-1] = '\0';
	(void) fclose(fp);
	return(1);
}

/*
 * Process a control file.
 */
process(file)
	char *file;
{
	FILE *cfp;

	if (!chk(file))
		return;
	if ((cfp = fopen(file, "r")) == NULL)
		fatal("cannot open %s", file);
	while (getline(cfp)) {
		switch (line[0]) {
		case 'U':  /* unlink associated files */
			if (from != host)
				printf("%s: ", host);
			printf(unlink(line+1) ? "cannot dequeue %s\n" :
				"%s dequeued\n", line+1);
		}
	}
	(void) fclose(cfp);
	if (from != host)
		printf("%s: ", host);
	printf(unlink(file) ? "cannot dequeue %s\n" : "%s dequeued\n", file);
}

/*
 * Do the dirty work in checking
 */
chk(file)
	char *file;
{
	register int *r, n;
	register char **u, *cp;
	FILE *cfp;

	/*
	 * Check for valid cf file name (mostly checking current).
	 */
	if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f')
		return(0);

	if (all && (from == host || !strcmp(from, file+6)))
		return(1);

	/*
	 * get the owner's name from the control file.
	 */
	if ((cfp = fopen(file, "r")) == NULL)
		return(0);
	while (getline(cfp)) {
		if (line[0] == 'P')
			break;
	}
	(void) fclose(cfp);
	if (line[0] != 'P')
		return(0);

	if (users == 0 && requests == 0)
		return(!strcmp(file, current) && isowner(line+1, file));
	/*
	 * Check the request list
	 */
	for (n = 0, cp = file+3; isdigit(*cp); )
		n = n * 10 + (*cp++ - '0');
	for (r = requ; r < &requ[requests]; r++)
		if (*r == n && isowner(line+1, file))
			return(1);
	/*
	 * Check to see if it's in the user list
	 */
	for (u = user; u < &user[users]; u++)
		if (!strcmp(*u, line+1) && isowner(line+1, file))
			return(1);
	return(0);
}

/*
 * If root is removing a file on the local machine, allow it.
 * If root is removing a file from a remote machine, only allow
 * files sent from the remote machine to be removed.
 * Normal users can only remove the file from where it was sent.
 */
isowner(owner, file)
	char *owner, *file;
{
	if (!strcmp(person, root) && (from == host || !strcmp(from, file+6)))
		return(1);
	if (!strcmp(person, owner) && !strcmp(from, file+6))
		return(1);
	if (from != host)
		printf("%s: ", host);
	printf("%s: Permission denied\n", file);
	return(0);
}

/*
 * Check to see if we are sending files to a remote machine. If we are,
 * then try removing files on the remote machine.
 */
chkremote()
{
	register char *cp;
	register int i, rem;
	char buf[BUFSIZ];

	if (*LP || RM == NULL)
		return;	/* not sending to a remote machine */

	/*
	 * Flush stdout so the user can see what has been deleted
	 * while we wait (possibly) for the connection.
	 */
	fflush(stdout);

	sprintf(buf, "\5%s %s", RP, all ? "-all" : person);
	cp = buf;
	for (i = 0; i < users; i++) {
		cp += strlen(cp);
		*cp++ = ' ';
		strcpy(cp, user[i]);
	}
	for (i = 0; i < requests; i++) {
		cp += strlen(cp);
		(void) sprintf(cp, " %d", requ[i]);
	}
	strcat(cp, "\n");
	rem = getport(RM);
	if (rem < 0) {
		if (from != host)
			printf("%s: ", host);
		printf("connection to %s is down\n", RM);
	} else {
		i = strlen(buf);
		if (write(rem, buf, i) != i)
			fatal("Lost connection");
		while ((i = read(rem, buf, sizeof(buf))) > 0)
			(void) fwrite(buf, 1, i, stdout);
		(void) close(rem);
	}
}

/*
 * Return 1 if the filename begins with 'cf'
 */
iscf(d)
	struct direct *d;
{
	return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
}
Commit	Line	Data
d0aeaf5a DF	1	/*
d0aeaf5a DF	2	* Copyright (c) 1983 Regents of the University of California.
9d85c861 KB	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
a399f6c8 KB	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
d0aeaf5a DF	16	*/
d0aeaf5a DF	17
5f84f8f0	18	#ifndef lint
7abf8d65	19	static char sccsid[] = "@(#)rmjob.c 5.5 (Berkeley) %G%";
9d85c861	20	#endif /* not lint */
5f84f8f0	21
ccbfa562 RC	22	/*
	23	* rmjob - remove the specified jobs from the queue.
	24	*/
	25
	26	#include "lp.h"
7abf8d65	27	#include "pathnames.h"
ccbfa562 RC	28
	29	/*
	30	* Stuff for handling lprm specifications
	31	*/
	32	extern char user[]; / users to process */
	33	extern int users; /* # of users in user array */
	34	extern int requ[]; /* job number of spool entries */
	35	extern int requests; /* # of spool requests */
54266d1f	36	extern char person; / name of person doing lprm */
ccbfa562	37
3d3c9f9f RC	38	char root[] = "root";
	39	int all = 0; /* eliminate all files (root only) */
	40	int cur_daemon; /* daemon's pid */
	41	char current[40]; /* active control file name */
ccbfa562 RC	42
	43	int iscf();
	44
	45	rmjob()
	46	{
	47	register int i, nitems;
	48	int assasinated = 0;
	49	struct direct **files;
	50
ccbfa562 RC	51	if ((i = pgetent(line, printer)) < 0)
	52	fatal("cannot open printer description file");
	53	else if (i == 0)
	54	fatal("unknown printer");
	55	if ((SD = pgetstr("sd", &bp)) == NULL)
7abf8d65	56	SD = _PATH_DEFSPOOL;
ccbfa562 RC	57	if ((LO = pgetstr("lo", &bp)) == NULL)
	58	LO = DEFLOCK;
	59	if ((LP = pgetstr("lp", &bp)) == NULL)
7abf8d65	60	LP = _PATH_DEFDEVLP;
ccbfa562	61	if ((RP = pgetstr("rp", &bp)) == NULL)
4d4caa50	62	RP = DEFLP;
a87bde97	63	RM = pgetstr("rm", &bp);
7bc71354 TF	64	/*
	65	* Figure out whether the local machine is the same as the remote
	66	* machine entry (if it exists). If not, then ignore the local
	67	* queue information.
	68	*/
	69	if (RM != (char *) NULL) {
	70	char name[256];
	71	struct hostent *hp;
	72
	73	/* get the standard network name of the local host */
	74	gethostname(name, sizeof(name));
	75	name[sizeof(name)-1] = '\0';
	76	hp = gethostbyname(name);
	77	if (hp == (struct hostent *) NULL) {
	78	printf("unable to get network name for local machine %s",
	79	name);
	80	goto localcheck_done;
	81	} else strcpy(name, hp->h_name);
	82
	83	/* get the standard network name of RM */
	84	hp = gethostbyname(RM);
	85	if (hp == (struct hostent *) NULL) {
	86	printf("unable to get hostname for remote machine %s", RM);
	87	goto localcheck_done;
	88	}
	89
	90	/* if printer is not on local machine, ignore LP */
	91	if (strcmp(name, hp->h_name) != 0) *LP = '\0';
	92	}
	93	localcheck_done:
ccbfa562 RC	94
	95	/*
	96	* If the format was `lprm -' and the user isn't the super-user,
	97	* then fake things to look like he said `lprm user'.
	98	*/
	99	if (users < 0) {
	100	if (getuid() == 0)
	101	all = 1; /* all files in local queue */
	102	else {
	103	user[0] = person;
	104	users = 1;
	105	}
	106	}
	107	if (!strcmp(person, "-all")) {
	108	if (from == host)
	109	fatal("The login name \"-all\" is reserved");
	110	all = 1; /* all those from 'from' */
	111	person = root;
	112	}
	113
	114	if (chdir(SD) < 0)
	115	fatal("cannot chdir to spool directory");
	116	if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
	117	fatal("cannot access spool directory");
	118
	119	if (nitems) {
	120	/*
	121	* Check for an active printer daemon (in which case we
	122	* kill it if it is reading our file) then remove stuff
	123	* (after which we have to restart the daemon).
	124	*/
	125	if (lockchk(LO) && chk(current)) {
	126	assasinated = kill(cur_daemon, SIGINT) == 0;
	127	if (!assasinated)
	128	fatal("cannot kill printer daemon");
	129	}
	130	/*
	131	* process the files
	132	*/
	133	for (i = 0; i < nitems; i++)
	134	process(files[i]->d_name);
	135	}
	136	chkremote();
	137	/*
	138	* Restart the printer daemon if it was killed
	139	*/
775e8534	140	if (assasinated && !startdaemon(printer))
ccbfa562 RC	141	fatal("cannot restart printer daemon\n");
	142	exit(0);
	143	}
	144
	145	/*
	146	* Process a lock file: collect the pid of the active
	147	* daemon and the file name of the active spool entry.
	148	* Return boolean indicating existence of a lock file.
	149	*/
	150	lockchk(s)
	151	char *s;
	152	{
	153	register FILE *fp;
	154	register int i, n;
	155
	156	if ((fp = fopen(s, "r")) == NULL)
	157	if (errno == EACCES)
	158	fatal("can't access lock file");
	159	else
	160	return(0);
8fed920b	161	if (!getline(fp)) {
ccbfa562 RC	162	(void) fclose(fp);
	163	return(0); /* no daemon present */
	164	}
	165	cur_daemon = atoi(line);
8fed920b RC	166	if (kill(cur_daemon, 0) < 0) {
	167	(void) fclose(fp);
	168	return(0); /* no daemon present */
	169	}
ccbfa562	170	for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
a87bde97	171	if (i > 5) {
ccbfa562 RC	172	n = 1;
	173	break;
	174	}
	175	sleep(i);
	176	}
	177	current[n-1] = '\0';
	178	(void) fclose(fp);
	179	return(1);
	180	}
	181
	182	/*
	183	* Process a control file.
	184	*/
	185	process(file)
	186	char *file;
	187	{
	188	FILE *cfp;
	189
	190	if (!chk(file))
	191	return;
	192	if ((cfp = fopen(file, "r")) == NULL)
	193	fatal("cannot open %s", file);
3d3c9f9f	194	while (getline(cfp)) {
ccbfa562 RC	195	switch (line[0]) {
	196	case 'U': /* unlink associated files */
	197	if (from != host)
	198	printf("%s: ", host);
	199	printf(unlink(line+1) ? "cannot dequeue %s\n" :
	200	"%s dequeued\n", line+1);
	201	}
	202	}
	203	(void) fclose(cfp);
	204	if (from != host)
	205	printf("%s: ", host);
	206	printf(unlink(file) ? "cannot dequeue %s\n" : "%s dequeued\n", file);
	207	}
	208
	209	/*
	210	* Do the dirty work in checking
	211	*/
	212	chk(file)
	213	char *file;
	214	{
	215	register int *r, n;
	216	register char *u, cp;
	217	FILE *cfp;
	218
139505f2 RC	219	/*
	220	* Check for valid cf file name (mostly checking current).
	221	*/
	222	if (strlen(file) < 7 \|\| file[0] != 'c' \|\| file[1] != 'f')
	223	return(0);
	224
ccbfa562 RC	225	if (all && (from == host \|\| !strcmp(from, file+6)))
	226	return(1);
	227
	228	/*
	229	* get the owner's name from the control file.
	230	*/
	231	if ((cfp = fopen(file, "r")) == NULL)
	232	return(0);
	233	while (getline(cfp)) {
	234	if (line[0] == 'P')
	235	break;
	236	}
	237	(void) fclose(cfp);
	238	if (line[0] != 'P')
	239	return(0);
	240
	241	if (users == 0 && requests == 0)
	242	return(!strcmp(file, current) && isowner(line+1, file));
	243	/*
	244	* Check the request list
	245	*/
	246	for (n = 0, cp = file+3; isdigit(*cp); )
	247	n = n * 10 + (*cp++ - '0');
	248	for (r = requ; r < &requ[requests]; r++)
	249	if (*r == n && isowner(line+1, file))
	250	return(1);
	251	/*
	252	* Check to see if it's in the user list
	253	*/
	254	for (u = user; u < &user[users]; u++)
	255	if (!strcmp(*u, line+1) && isowner(line+1, file))
	256	return(1);
	257	return(0);
	258	}
	259
	260	/*
	261	* If root is removing a file on the local machine, allow it.
4d4caa50 RC	262	* If root is removing a file from a remote machine, only allow
4d4caa50 RC	263	* files sent from the remote machine to be removed.
ccbfa562 RC	264	* Normal users can only remove the file from where it was sent.
	265	*/
	266	isowner(owner, file)
	267	char owner, file;
	268	{
4d4caa50 RC	269	if (!strcmp(person, root) && (from == host \|\| !strcmp(from, file+6)))
	270	return(1);
	271	if (!strcmp(person, owner) && !strcmp(from, file+6))
	272	return(1);
	273	if (from != host)
	274	printf("%s: ", host);
	275	printf("%s: Permission denied\n", file);
	276	return(0);
ccbfa562 RC	277	}
	278
	279	/*
	280	* Check to see if we are sending files to a remote machine. If we are,
	281	* then try removing files on the remote machine.
	282	*/
	283	chkremote()
	284	{
	285	register char *cp;
	286	register int i, rem;
	287	char buf[BUFSIZ];
	288
	289	if (*LP \|\| RM == NULL)
	290	return; /* not sending to a remote machine */
	291
4d4caa50 RC	292	/*
	293	* Flush stdout so the user can see what has been deleted
	294	* while we wait (possibly) for the connection.
	295	*/
	296	fflush(stdout);
	297
ccbfa562 RC	298	sprintf(buf, "\5%s %s", RP, all ? "-all" : person);
	299	cp = buf;
	300	for (i = 0; i < users; i++) {
	301	cp += strlen(cp);
	302	*cp++ = ' ';
	303	strcpy(cp, user[i]);
	304	}
	305	for (i = 0; i < requests; i++) {
	306	cp += strlen(cp);
	307	(void) sprintf(cp, " %d", requ[i]);
	308	}
	309	strcat(cp, "\n");
a87bde97	310	rem = getport(RM);
ccbfa562 RC	311	if (rem < 0) {
	312	if (from != host)
	313	printf("%s: ", host);
	314	printf("connection to %s is down\n", RM);
	315	} else {
	316	i = strlen(buf);
	317	if (write(rem, buf, i) != i)
	318	fatal("Lost connection");
	319	while ((i = read(rem, buf, sizeof(buf))) > 0)
	320	(void) fwrite(buf, 1, i, stdout);
	321	(void) close(rem);
	322	}
	323	}
	324
	325	/*
	326	* Return 1 if the filename begins with 'cf'
	327	*/
	328	iscf(d)
	329	struct direct *d;
	330	{
	331	return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
	332	}