[unix-history] / .ref-fdb8e4aac282b72d4670aa3a26d9bba07afc7e6f / usr / src / usr.sbin / lpr / common_source / rmjob.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)rmjob.c	5.7 (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;
	char *cp;

	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);
	if (cp = checkremote())
		printf("Warning: %s\n", cp);

	/*
	 * 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);
	}
	rmremote();
	/*
	 * 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.
 */
rmremote()
{
	register char *cp;
	register int i, rem;
	char buf[BUFSIZ];

	if (!sendtorem)
		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.
9d85c861 KB	4	*
417f7a11	5	* %sccs.include.redist.c%
d0aeaf5a DF	6	*/
d0aeaf5a DF	7
5f84f8f0	8	#ifndef lint
417f7a11	9	static char sccsid[] = "@(#)rmjob.c 5.7 (Berkeley) %G%";
9d85c861	10	#endif /* not lint */
5f84f8f0	11
ccbfa562 RC	12	/*
	13	* rmjob - remove the specified jobs from the queue.
	14	*/
	15
	16	#include "lp.h"
7abf8d65	17	#include "pathnames.h"
ccbfa562 RC	18
	19	/*
	20	* Stuff for handling lprm specifications
	21	*/
	22	extern char user[]; / users to process */
	23	extern int users; /* # of users in user array */
	24	extern int requ[]; /* job number of spool entries */
	25	extern int requests; /* # of spool requests */
54266d1f	26	extern char person; / name of person doing lprm */
ccbfa562	27
3d3c9f9f RC	28	char root[] = "root";
	29	int all = 0; /* eliminate all files (root only) */
	30	int cur_daemon; /* daemon's pid */
	31	char current[40]; /* active control file name */
ccbfa562 RC	32
	33	int iscf();
	34
	35	rmjob()
	36	{
	37	register int i, nitems;
	38	int assasinated = 0;
	39	struct direct **files;
b5eb1530	40	char *cp;
ccbfa562	41
ccbfa562 RC	42	if ((i = pgetent(line, printer)) < 0)
	43	fatal("cannot open printer description file");
	44	else if (i == 0)
	45	fatal("unknown printer");
	46	if ((SD = pgetstr("sd", &bp)) == NULL)
7abf8d65	47	SD = _PATH_DEFSPOOL;
ccbfa562 RC	48	if ((LO = pgetstr("lo", &bp)) == NULL)
	49	LO = DEFLOCK;
	50	if ((LP = pgetstr("lp", &bp)) == NULL)
7abf8d65	51	LP = _PATH_DEFDEVLP;
ccbfa562	52	if ((RP = pgetstr("rp", &bp)) == NULL)
4d4caa50	53	RP = DEFLP;
a87bde97	54	RM = pgetstr("rm", &bp);
b5eb1530 TF	55	if (cp = checkremote())
b5eb1530 TF	56	printf("Warning: %s\n", cp);
ccbfa562 RC	57
	58	/*
	59	* If the format was `lprm -' and the user isn't the super-user,
	60	* then fake things to look like he said `lprm user'.
	61	*/
	62	if (users < 0) {
	63	if (getuid() == 0)
	64	all = 1; /* all files in local queue */
	65	else {
	66	user[0] = person;
	67	users = 1;
	68	}
	69	}
	70	if (!strcmp(person, "-all")) {
	71	if (from == host)
	72	fatal("The login name \"-all\" is reserved");
	73	all = 1; /* all those from 'from' */
	74	person = root;
	75	}
	76
	77	if (chdir(SD) < 0)
	78	fatal("cannot chdir to spool directory");
	79	if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
	80	fatal("cannot access spool directory");
	81
	82	if (nitems) {
	83	/*
	84	* Check for an active printer daemon (in which case we
	85	* kill it if it is reading our file) then remove stuff
	86	* (after which we have to restart the daemon).
	87	*/
	88	if (lockchk(LO) && chk(current)) {
	89	assasinated = kill(cur_daemon, SIGINT) == 0;
	90	if (!assasinated)
	91	fatal("cannot kill printer daemon");
	92	}
	93	/*
	94	* process the files
	95	*/
	96	for (i = 0; i < nitems; i++)
	97	process(files[i]->d_name);
	98	}
b5eb1530	99	rmremote();
ccbfa562 RC	100	/*
	101	* Restart the printer daemon if it was killed
	102	*/
775e8534	103	if (assasinated && !startdaemon(printer))
ccbfa562 RC	104	fatal("cannot restart printer daemon\n");
	105	exit(0);
	106	}
	107
	108	/*
	109	* Process a lock file: collect the pid of the active
	110	* daemon and the file name of the active spool entry.
	111	* Return boolean indicating existence of a lock file.
	112	*/
	113	lockchk(s)
	114	char *s;
	115	{
	116	register FILE *fp;
	117	register int i, n;
	118
	119	if ((fp = fopen(s, "r")) == NULL)
	120	if (errno == EACCES)
	121	fatal("can't access lock file");
	122	else
	123	return(0);
8fed920b	124	if (!getline(fp)) {
ccbfa562 RC	125	(void) fclose(fp);
	126	return(0); /* no daemon present */
	127	}
	128	cur_daemon = atoi(line);
8fed920b RC	129	if (kill(cur_daemon, 0) < 0) {
	130	(void) fclose(fp);
	131	return(0); /* no daemon present */
	132	}
ccbfa562	133	for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
a87bde97	134	if (i > 5) {
ccbfa562 RC	135	n = 1;
	136	break;
	137	}
	138	sleep(i);
	139	}
	140	current[n-1] = '\0';
	141	(void) fclose(fp);
	142	return(1);
	143	}
	144
	145	/*
	146	* Process a control file.
	147	*/
	148	process(file)
	149	char *file;
	150	{
	151	FILE *cfp;
	152
	153	if (!chk(file))
	154	return;
	155	if ((cfp = fopen(file, "r")) == NULL)
	156	fatal("cannot open %s", file);
3d3c9f9f	157	while (getline(cfp)) {
ccbfa562 RC	158	switch (line[0]) {
	159	case 'U': /* unlink associated files */
	160	if (from != host)
	161	printf("%s: ", host);
	162	printf(unlink(line+1) ? "cannot dequeue %s\n" :
	163	"%s dequeued\n", line+1);
	164	}
	165	}
	166	(void) fclose(cfp);
	167	if (from != host)
	168	printf("%s: ", host);
	169	printf(unlink(file) ? "cannot dequeue %s\n" : "%s dequeued\n", file);
	170	}
	171
	172	/*
	173	* Do the dirty work in checking
	174	*/
	175	chk(file)
	176	char *file;
	177	{
	178	register int *r, n;
	179	register char *u, cp;
	180	FILE *cfp;
	181
139505f2 RC	182	/*
	183	* Check for valid cf file name (mostly checking current).
	184	*/
	185	if (strlen(file) < 7 \|\| file[0] != 'c' \|\| file[1] != 'f')
	186	return(0);
	187
ccbfa562 RC	188	if (all && (from == host \|\| !strcmp(from, file+6)))
	189	return(1);
	190
	191	/*
	192	* get the owner's name from the control file.
	193	*/
	194	if ((cfp = fopen(file, "r")) == NULL)
	195	return(0);
	196	while (getline(cfp)) {
	197	if (line[0] == 'P')
	198	break;
	199	}
	200	(void) fclose(cfp);
	201	if (line[0] != 'P')
	202	return(0);
	203
	204	if (users == 0 && requests == 0)
	205	return(!strcmp(file, current) && isowner(line+1, file));
	206	/*
	207	* Check the request list
	208	*/
	209	for (n = 0, cp = file+3; isdigit(*cp); )
	210	n = n * 10 + (*cp++ - '0');
	211	for (r = requ; r < &requ[requests]; r++)
	212	if (*r == n && isowner(line+1, file))
	213	return(1);
	214	/*
	215	* Check to see if it's in the user list
	216	*/
	217	for (u = user; u < &user[users]; u++)
	218	if (!strcmp(*u, line+1) && isowner(line+1, file))
	219	return(1);
	220	return(0);
	221	}
	222
	223	/*
	224	* If root is removing a file on the local machine, allow it.
4d4caa50 RC	225	* If root is removing a file from a remote machine, only allow
4d4caa50 RC	226	* files sent from the remote machine to be removed.
ccbfa562 RC	227	* Normal users can only remove the file from where it was sent.
	228	*/
	229	isowner(owner, file)
	230	char owner, file;
	231	{
4d4caa50 RC	232	if (!strcmp(person, root) && (from == host \|\| !strcmp(from, file+6)))
	233	return(1);
	234	if (!strcmp(person, owner) && !strcmp(from, file+6))
	235	return(1);
	236	if (from != host)
	237	printf("%s: ", host);
	238	printf("%s: Permission denied\n", file);
	239	return(0);
ccbfa562 RC	240	}
	241
	242	/*
	243	* Check to see if we are sending files to a remote machine. If we are,
	244	* then try removing files on the remote machine.
	245	*/
b5eb1530	246	rmremote()
ccbfa562 RC	247	{
	248	register char *cp;
	249	register int i, rem;
	250	char buf[BUFSIZ];
	251
b5eb1530	252	if (!sendtorem)
ccbfa562 RC	253	return; /* not sending to a remote machine */
ccbfa562 RC	254
4d4caa50 RC	255	/*
	256	* Flush stdout so the user can see what has been deleted
	257	* while we wait (possibly) for the connection.
	258	*/
	259	fflush(stdout);
	260
ccbfa562 RC	261	sprintf(buf, "\5%s %s", RP, all ? "-all" : person);
	262	cp = buf;
	263	for (i = 0; i < users; i++) {
	264	cp += strlen(cp);
	265	*cp++ = ' ';
	266	strcpy(cp, user[i]);
	267	}
	268	for (i = 0; i < requests; i++) {
	269	cp += strlen(cp);
	270	(void) sprintf(cp, " %d", requ[i]);
	271	}
	272	strcat(cp, "\n");
a87bde97	273	rem = getport(RM);
ccbfa562 RC	274	if (rem < 0) {
	275	if (from != host)
	276	printf("%s: ", host);
	277	printf("connection to %s is down\n", RM);
	278	} else {
	279	i = strlen(buf);
	280	if (write(rem, buf, i) != i)
	281	fatal("Lost connection");
	282	while ((i = read(rem, buf, sizeof(buf))) > 0)
	283	(void) fwrite(buf, 1, i, stdout);
	284	(void) close(rem);
	285	}
	286	}
	287
	288	/*
	289	* Return 1 if the filename begins with 'cf'
	290	*/
	291	iscf(d)
	292	struct direct *d;
	293	{
	294	return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
	295	}