2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
36 static char sccsid[] = "@(#)rmjob.c 8.2 (Berkeley) 4/28/95";
40 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
41 __FBSDID("$FreeBSD$");
43 #include <sys/param.h>
53 #define psignal foil_gcc_psignal
54 #define sys_siglist foil_gcc_siglist
61 #include "pathnames.h"
64 * rmjob - remove the specified jobs from the queue.
68 * Stuff for handling lprm specifications
70 static char root[] = "root";
71 static int all = 0; /* eliminate all files (root only) */
72 static int cur_daemon; /* daemon's pid */
73 static char current[7+MAXHOSTNAMELEN]; /* active control file name */
75 extern uid_t uid, euid; /* real and effective user id's */
77 static void alarmhandler(int _signo);
78 static void do_unlink(char *_file);
79 static int isowner(char *_owner, char *_file, const char *_cfhost);
82 rmjob(const char *printer)
84 register int i, nitems;
86 struct dirent **files;
88 struct printer myprinter, *pp = &myprinter;
91 if ((i = getprintcap(printer, pp)) < 0)
92 fatal(pp, "getprintcap: %s", pcaperr(i));
93 if ((cp = checkremote(pp))) {
94 printf("Warning: %s\n", cp);
99 * If the format was `lprm -' and the user isn't the super-user,
100 * then fake things to look like he said `lprm user'.
104 all = 1; /* all files in local queue */
110 if (!strcmp(person, "-all")) {
111 if (from_host == local_host)
112 fatal(pp, "The login name \"-all\" is reserved");
113 all = 1; /* all those from 'from_host' */
118 if (chdir(pp->spool_dir) < 0)
119 fatal(pp, "cannot chdir to spool directory");
120 if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
121 fatal(pp, "cannot access spool directory");
126 * Check for an active printer daemon (in which case we
127 * kill it if it is reading our file) then remove stuff
128 * (after which we have to restart the daemon).
130 if (lockchk(pp, pp->lock_file) && chk(current)) {
132 assasinated = kill(cur_daemon, SIGINT) == 0;
135 fatal(pp, "cannot kill printer daemon");
140 for (i = 0; i < nitems; i++)
141 process(pp, files[i]->d_name);
145 * Restart the printer daemon if it was killed
147 if (assasinated && !startdaemon(pp))
148 fatal(pp, "cannot restart printer daemon\n");
153 * Process a lock file: collect the pid of the active
154 * daemon and the file name of the active spool entry.
155 * Return boolean indicating existence of a lock file.
158 lockchk(struct printer *pp, char *slockf)
164 if ((fp = fopen(slockf, "r")) == NULL) {
166 fatal(pp, "%s: %s", slockf, strerror(errno));
173 return(0); /* no daemon present */
175 cur_daemon = atoi(line);
176 if (kill(cur_daemon, 0) < 0 && errno != EPERM) {
178 return(0); /* no daemon present */
180 for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
193 * Process a control file.
196 process(const struct printer *pp, char *file)
203 if ((cfp = fopen(file, "r")) == NULL)
204 fatal(pp, "cannot open %s", file);
206 while (getline(cfp)) {
208 case 'U': /* unlink associated files */
209 if (strchr(line+1, '/') || strncmp(line+1, "df", 2))
219 do_unlink(char *file)
223 if (from_host != local_host)
224 printf("%s: ", local_host);
228 printf(ret ? "cannot dequeue %s\n" : "%s dequeued\n", file);
232 * Do the dirty work in checking
243 * Check for valid cf file name (mostly checking current).
245 if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f')
248 jnum = calc_jobnum(file, &cfhost);
249 if (all && (from_host == local_host || !strcmp(from_host, cfhost)))
253 * get the owner's name from the control file.
256 if ((cfp = fopen(file, "r")) == NULL)
259 while (getline(cfp)) {
267 if (users == 0 && requests == 0)
268 return(!strcmp(file, current) && isowner(line+1, file, cfhost));
270 * Check the request list
272 for (r = requ; r < &requ[requests]; r++)
273 if (*r == jnum && isowner(line+1, file, cfhost))
276 * Check to see if it's in the user list
278 for (u = user; u < &user[users]; u++)
279 if (!strcmp(*u, line+1) && isowner(line+1, file, cfhost))
285 * If root is removing a file on the local machine, allow it.
286 * If root is removing a file from a remote machine, only allow
287 * files sent from the remote machine to be removed.
288 * Normal users can only remove the file from where it was sent.
291 isowner(char *owner, char *file, const char *cfhost)
293 if (!strcmp(person, root) && (from_host == local_host ||
294 !strcmp(from_host, cfhost)))
296 if (!strcmp(person, owner) && !strcmp(from_host, cfhost))
298 if (from_host != local_host)
299 printf("%s: ", local_host);
300 printf("%s: Permission denied\n", file);
305 * Check to see if we are sending files to a remote machine. If we are,
306 * then try removing files on the remote machine.
309 rmremote(const struct printer *pp)
311 int i, elem, firstreq, niov, rem, totlen;
313 void (*savealrm)(int);
317 return; /* not sending to a remote machine */
320 * Flush stdout so the user can see what has been deleted
321 * while we wait (possibly) for the connection.
327 * 4 == "\5" + remote_queue + " " + person
328 * 2 * users == " " + user[i] for each user
329 * requests == asprintf results for each request
331 * Although laborious, doing it this way makes it possible for
332 * us to process requests of indeterminate length without
333 * applying an arbitrary limit. Arbitrary Limits Are Bad (tm).
336 niov = 4 + 2 * users + requests + 1;
338 niov = 4 + requests + 1;
339 iov = malloc(niov * sizeof *iov);
341 fatal(pp, "out of memory in rmremote()");
342 iov[0].iov_base = "\5";
343 iov[1].iov_base = pp->remote_queue;
344 iov[2].iov_base = " ";
345 iov[3].iov_base = all ? "-all" : person;
347 for (i = 0; i < users; i++) {
348 iov[elem].iov_base = " ";
349 iov[elem + 1].iov_base = user[i];
353 for (i = 0; i < requests; i++) {
354 asprintf((char **)&iov[elem].iov_base, " %d", requ[i]);
355 if (iov[elem].iov_base == 0)
356 fatal(pp, "out of memory in rmremote()");
359 iov[elem++].iov_base = "\n";
360 for (totlen = i = 0; i < niov; i++)
361 totlen += (iov[i].iov_len = strlen(iov[i].iov_base));
363 savealrm = signal(SIGALRM, alarmhandler);
364 alarm(pp->conn_timeout);
365 rem = getport(pp, pp->remote_host, 0);
366 (void)signal(SIGALRM, savealrm);
368 if (from_host != local_host)
369 printf("%s: ", local_host);
370 printf("connection to %s is down\n", pp->remote_host);
372 if (writev(rem, iov, niov) != totlen)
373 fatal(pp, "Lost connection");
374 while ((i = read(rem, buf, sizeof(buf))) > 0)
375 (void) fwrite(buf, 1, i, stdout);
378 for (i = 0; i < requests; i++)
379 free(iov[firstreq + i].iov_base);
384 * Return 1 if the filename begins with 'cf'
387 iscf(struct dirent *d)
389 return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
393 alarmhandler(int signo __unused)
395 /* the signal is ignored */
396 /* (the '__unused' is just to avoid a compile-time warning) */