xref: /freebsd/usr.sbin/lpr/common_source/displayq.c (revision 39beb93c3f8bdbf72a61fda42300b5ebed7390c8)
1 /*
2  * Copyright (c) 1983, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #if 0
35 #ifndef lint
36 static char sccsid[] = "@(#)displayq.c	8.4 (Berkeley) 4/28/95";
37 #endif /* not lint */
38 #endif
39 
40 #include "lp.cdefs.h"		/* A cross-platform version of <sys/cdefs.h> */
41 __FBSDID("$FreeBSD$");
42 
43 #include <sys/param.h>
44 #include <sys/stat.h>
45 
46 #include <ctype.h>
47 #include <dirent.h>
48 #include <errno.h>
49 #include <fcntl.h>
50 #include <signal.h>
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54 #define psignal foil_gcc_psignal
55 #define	sys_siglist foil_gcc_siglist
56 #include <unistd.h>
57 #undef psignal
58 #undef sys_siglist
59 
60 #include "lp.h"
61 #include "lp.local.h"
62 #include "pathnames.h"
63 
64 /*
65  * Routines to display the state of the queue.
66  */
67 #define JOBCOL	40		/* column for job # in -l format */
68 #define OWNCOL	7		/* start of Owner column in normal */
69 #define SIZCOL	62		/* start of Size column in normal */
70 
71 /*
72  * Stuff for handling job specifications
73  */
74 extern uid_t	uid, euid;
75 
76 static int	col;		/* column on screen */
77 static char	current[MAXNAMLEN+1];	/* current file being printed */
78 static char	file[MAXNAMLEN+1];	/* print file name */
79 static int	first;		/* first file in ``files'' column? */
80 static int	garbage;	/* # of garbage cf files */
81 static int	lflag;		/* long output option */
82 static int	rank;		/* order to be printed (-1=none, 0=active) */
83 static long	totsize;	/* total print job size in bytes */
84 
85 static const char  *head0 = "Rank   Owner      Job  Files";
86 static const char  *head1 = "Total Size\n";
87 
88 static void	alarmhandler(int _signo);
89 static void	warn(const struct printer *_pp);
90 
91 /*
92  * Display the current state of the queue. Format = 1 if long format.
93  */
94 void
95 displayq(struct printer *pp, int format)
96 {
97 	register struct jobqueue *q;
98 	register int i, nitems, fd, ret;
99 	char *cp, *endp;
100 	struct jobqueue **queue;
101 	struct stat statb;
102 	FILE *fp;
103 	void (*savealrm)(int);
104 
105 	lflag = format;
106 	totsize = 0;
107 	rank = -1;
108 
109 	if ((cp = checkremote(pp))) {
110 		printf("Warning: %s\n", cp);
111 		free(cp);
112 	}
113 
114 	/*
115 	 * Print out local queue
116 	 * Find all the control files in the spooling directory
117 	 */
118 	seteuid(euid);
119 	if (chdir(pp->spool_dir) < 0)
120 		fatal(pp, "cannot chdir to spooling directory: %s",
121 		      strerror(errno));
122 	seteuid(uid);
123 	if ((nitems = getq(pp, &queue)) < 0)
124 		fatal(pp, "cannot examine spooling area\n");
125 	seteuid(euid);
126 	ret = stat(pp->lock_file, &statb);
127 	seteuid(uid);
128 	if (ret >= 0) {
129 		if (statb.st_mode & LFM_PRINT_DIS) {
130 			if (pp->remote)
131 				printf("%s: ", local_host);
132 			printf("Warning: %s is down: ", pp->printer);
133 			seteuid(euid);
134 			fd = open(pp->status_file, O_RDONLY|O_SHLOCK);
135 			seteuid(uid);
136 			if (fd >= 0) {
137 				while ((i = read(fd, line, sizeof(line))) > 0)
138 					(void) fwrite(line, 1, i, stdout);
139 				(void) close(fd);	/* unlocks as well */
140 			} else
141 				putchar('\n');
142 		}
143 		if (statb.st_mode & LFM_QUEUE_DIS) {
144 			if (pp->remote)
145 				printf("%s: ", local_host);
146 			printf("Warning: %s queue is turned off\n",
147 			       pp->printer);
148 		}
149 	}
150 
151 	if (nitems) {
152 		seteuid(euid);
153 		fp = fopen(pp->lock_file, "r");
154 		seteuid(uid);
155 		if (fp == NULL)
156 			warn(pp);
157 		else {
158 			/* get daemon pid */
159 			cp = current;
160 			endp = cp + sizeof(current) - 1;
161 			while ((i = getc(fp)) != EOF && i != '\n') {
162 				if (cp < endp)
163 					*cp++ = i;
164 			}
165 			*cp = '\0';
166 			i = atoi(current);
167 			if (i <= 0) {
168 				ret = -1;
169 			} else {
170 				seteuid(euid);
171 				ret = kill(i, 0);
172 				seteuid(uid);
173 			}
174 			if (ret < 0) {
175 				warn(pp);
176 			} else {
177 				/* read current file name */
178 				cp = current;
179 				endp = cp + sizeof(current) - 1;
180 				while ((i = getc(fp)) != EOF && i != '\n') {
181 					if (cp < endp)
182 						*cp++ = i;
183 				}
184 				*cp = '\0';
185 				/*
186 				 * Print the status file.
187 				 */
188 				if (pp->remote)
189 					printf("%s: ", local_host);
190 				seteuid(euid);
191 				fd = open(pp->status_file, O_RDONLY|O_SHLOCK);
192 				seteuid(uid);
193 				if (fd >= 0) {
194 					while ((i = read(fd, line,
195 							 sizeof(line))) > 0)
196 						fwrite(line, 1, i, stdout);
197 					close(fd);	/* unlocks as well */
198 				} else
199 					putchar('\n');
200 			}
201 			(void) fclose(fp);
202 		}
203 		/*
204 		 * Now, examine the control files and print out the jobs to
205 		 * be done for each user.
206 		 */
207 		if (!lflag)
208 			header();
209 		for (i = 0; i < nitems; i++) {
210 			q = queue[i];
211 			inform(pp, q->job_cfname);
212 			free(q);
213 		}
214 		free(queue);
215 	}
216 	if (!pp->remote) {
217 		if (nitems == 0)
218 			puts("no entries");
219 		return;
220 	}
221 
222 	/*
223 	 * Print foreign queue
224 	 * Note that a file in transit may show up in either queue.
225 	 */
226 	if (nitems)
227 		putchar('\n');
228 	(void) snprintf(line, sizeof(line), "%c%s", format ? '\4' : '\3',
229 			pp->remote_queue);
230 	cp = line;
231 	for (i = 0; i < requests && cp-line+10 < sizeof(line) - 1; i++) {
232 		cp += strlen(cp);
233 		(void) sprintf(cp, " %d", requ[i]);
234 	}
235 	for (i = 0; i < users && cp - line + 1 + strlen(user[i]) <
236 		sizeof(line) - 1; i++) {
237 		cp += strlen(cp);
238 		*cp++ = ' ';
239 		(void) strcpy(cp, user[i]);
240 	}
241 	strcat(line, "\n");
242 	savealrm = signal(SIGALRM, alarmhandler);
243 	alarm(pp->conn_timeout);
244 	fd = getport(pp, pp->remote_host, 0);
245 	alarm(0);
246 	(void)signal(SIGALRM, savealrm);
247 	if (fd < 0) {
248 		if (from_host != local_host)
249 			printf("%s: ", local_host);
250 		printf("connection to %s is down\n", pp->remote_host);
251 	}
252 	else {
253 		i = strlen(line);
254 		if (write(fd, line, i) != i)
255 			fatal(pp, "Lost connection");
256 		while ((i = read(fd, line, sizeof(line))) > 0)
257 			(void) fwrite(line, 1, i, stdout);
258 		(void) close(fd);
259 	}
260 }
261 
262 /*
263  * Print a warning message if there is no daemon present.
264  */
265 static void
266 warn(const struct printer *pp)
267 {
268 	if (pp->remote)
269 		printf("%s: ", local_host);
270 	puts("Warning: no daemon present");
271 	current[0] = '\0';
272 }
273 
274 /*
275  * Print the header for the short listing format
276  */
277 void
278 header(void)
279 {
280 	printf("%s", head0);
281 	col = strlen(head0)+1;
282 	blankfill(SIZCOL);
283 	printf("%s", head1);
284 }
285 
286 void
287 inform(const struct printer *pp, char *cf)
288 {
289 	int copycnt, jnum;
290 	char	 savedname[MAXPATHLEN+1];
291 	FILE	*cfp;
292 
293 	/*
294 	 * There's a chance the control file has gone away
295 	 * in the meantime; if this is the case just keep going
296 	 */
297 	seteuid(euid);
298 	if ((cfp = fopen(cf, "r")) == NULL)
299 		return;
300 	seteuid(uid);
301 
302 	if (rank < 0)
303 		rank = 0;
304 	if (pp->remote || garbage || strcmp(cf, current))
305 		rank++;
306 
307 	/*
308 	 * The cf-file may include commands to print more than one datafile
309 	 * from the user.  For each datafile, the cf-file contains at least
310 	 * one line which starts with some format-specifier ('a'-'z'), and
311 	 * a second line ('N'ame) which indicates the original name the user
312 	 * specified for that file.  There can be multiple format-spec lines
313 	 * for a single Name-line, if the user requested multiple copies of
314 	 * that file.  Standard lpr puts the format-spec line(s) before the
315 	 * Name-line, while lprNG puts the Name-line before the format-spec
316 	 * line(s).  This section needs to handle the lines in either order.
317 	 */
318 	copycnt = 0;
319 	file[0] = '\0';
320 	savedname[0] = '\0';
321 	jnum = calc_jobnum(cf, NULL);
322 	while (getline(cfp)) {
323 		switch (line[0]) {
324 		case 'P': /* Was this file specified in the user's list? */
325 			if (!inlist(line+1, cf)) {
326 				fclose(cfp);
327 				return;
328 			}
329 			if (lflag) {
330 				printf("\n%s: ", line+1);
331 				col = strlen(line+1) + 2;
332 				prank(rank);
333 				blankfill(JOBCOL);
334 				printf(" [job %s]\n", cf+3);
335 			} else {
336 				col = 0;
337 				prank(rank);
338 				blankfill(OWNCOL);
339 				printf("%-10s %-3d  ", line+1, jnum);
340 				col += 16;
341 				first = 1;
342 			}
343 			continue;
344 		default: /* some format specifer and file name? */
345 			if (line[0] < 'a' || line[0] > 'z')
346 				break;
347 			if (copycnt == 0 || strcmp(file, line+1) != 0) {
348 				strlcpy(file, line + 1, sizeof(file));
349 			}
350 			copycnt++;
351 			/*
352 			 * deliberately 'continue' to another getline(), so
353 			 * all format-spec lines for this datafile are read
354 			 * in and counted before calling show()
355 			 */
356 			continue;
357 		case 'N':
358 			strlcpy(savedname, line + 1, sizeof(savedname));
359 			break;
360 		}
361 		if ((file[0] != '\0') && (savedname[0] != '\0')) {
362 			show(savedname, file, copycnt);
363 			copycnt = 0;
364 			file[0] = '\0';
365 			savedname[0] = '\0';
366 		}
367 	}
368 	fclose(cfp);
369 	/* check for a file which hasn't been shown yet */
370 	if (file[0] != '\0') {
371 		if (savedname[0] == '\0') {
372 			/* a safeguard in case the N-ame line is missing */
373 			strlcpy(savedname, file, sizeof(savedname));
374 		}
375 		show(savedname, file, copycnt);
376 	}
377 	if (!lflag) {
378 		blankfill(SIZCOL);
379 		printf("%ld bytes\n", totsize);
380 		totsize = 0;
381 	}
382 }
383 
384 int
385 inlist(char *uname, char *cfile)
386 {
387 	int *r, jnum;
388 	char **u;
389 	const char *cfhost;
390 
391 	if (users == 0 && requests == 0)
392 		return(1);
393 	/*
394 	 * Check to see if it's in the user list
395 	 */
396 	for (u = user; u < &user[users]; u++)
397 		if (!strcmp(*u, uname))
398 			return(1);
399 	/*
400 	 * Check the request list
401 	 */
402 	jnum = calc_jobnum(cfile, &cfhost);
403 	for (r = requ; r < &requ[requests]; r++)
404 		if (*r == jnum && !strcmp(cfhost, from_host))
405 			return(1);
406 	return(0);
407 }
408 
409 void
410 show(const char *nfile, const char *datafile, int copies)
411 {
412 	if (strcmp(nfile, " ") == 0)
413 		nfile = "(standard input)";
414 	if (lflag)
415 		ldump(nfile, datafile, copies);
416 	else
417 		dump(nfile, datafile, copies);
418 }
419 
420 /*
421  * Fill the line with blanks to the specified column
422  */
423 void
424 blankfill(int tocol)
425 {
426 	while (col++ < tocol)
427 		putchar(' ');
428 }
429 
430 /*
431  * Give the abbreviated dump of the file names
432  */
433 void
434 dump(const char *nfile, const char *datafile, int copies)
435 {
436 	struct stat lbuf;
437 	const char etctmpl[] = ", ...";
438 	char	 etc[sizeof(etctmpl)];
439 	char	*lastsep;
440 	short	 fill, nlen;
441 	short	 rem, remetc;
442 
443 	/*
444 	 * Print as many filenames as will fit
445 	 *      (leaving room for the 'total size' field)
446 	 */
447 	fill = first ? 0 : 2;	/* fill space for ``, '' */
448 	nlen = strlen(nfile);
449 	rem = SIZCOL - 1 - col;
450 	if (nlen + fill > rem) {
451 		if (first) {
452 			/* print the right-most part of the name */
453 			printf("...%s ", &nfile[3+nlen-rem]);
454 			col = SIZCOL;
455 		} else if (rem > 0) {
456 			/* fit as much of the etc-string as we can */
457 			remetc = rem;
458 			if (rem > strlen(etctmpl))
459 				remetc = strlen(etctmpl);
460 			etc[0] = '\0';
461 			strncat(etc, etctmpl, remetc);
462 			printf("%s", etc);
463 			col += remetc;
464 			rem -= remetc;
465 			/* room for the last segment of this filename? */
466 			lastsep = strrchr(nfile, '/');
467 			if ((lastsep != NULL) && (rem > strlen(lastsep))) {
468 				/* print the right-most part of this name */
469 				printf("%s", lastsep);
470 				col += strlen(lastsep);
471 			} else {
472 				/* do not pack any more names in here */
473 				blankfill(SIZCOL);
474 			}
475 		}
476 	} else {
477 		if (!first)
478 			printf(", ");
479 		printf("%s", nfile);
480 		col += nlen + fill;
481 	}
482 	first = 0;
483 
484 	seteuid(euid);
485 	if (*datafile && !stat(datafile, &lbuf))
486 		totsize += copies * lbuf.st_size;
487 	seteuid(uid);
488 }
489 
490 /*
491  * Print the long info about the file
492  */
493 void
494 ldump(const char *nfile, const char *datafile, int copies)
495 {
496 	struct stat lbuf;
497 
498 	putchar('\t');
499 	if (copies > 1)
500 		printf("%-2d copies of %-19s", copies, nfile);
501 	else
502 		printf("%-32s", nfile);
503 	if (*datafile && !stat(datafile, &lbuf))
504 		printf(" %qd bytes", (long long) lbuf.st_size);
505 	else
506 		printf(" ??? bytes");
507 	putchar('\n');
508 }
509 
510 /*
511  * Print the job's rank in the queue,
512  *   update col for screen management
513  */
514 void
515 prank(int n)
516 {
517 	char rline[100];
518 	static const char *r[] = {
519 		"th", "st", "nd", "rd", "th", "th", "th", "th", "th", "th"
520 	};
521 
522 	if (n == 0) {
523 		printf("active");
524 		col += 6;
525 		return;
526 	}
527 	if ((n/10)%10 == 1)
528 		(void)snprintf(rline, sizeof(rline), "%dth", n);
529 	else
530 		(void)snprintf(rline, sizeof(rline), "%d%s", n, r[n%10]);
531 	col += strlen(rline);
532 	printf("%s", rline);
533 }
534 
535 void
536 alarmhandler(int signo __unused)
537 {
538 	/* the signal is ignored */
539 	/* (the '__unused' is just to avoid a compile-time warning) */
540 }
541