2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
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13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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32 static char sccsid[] = "@(#)rmjob.c 8.2 (Berkeley) 4/28/95";
36 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
37 __FBSDID("$FreeBSD$");
39 #include <sys/param.h>
50 #define psignal foil_gcc_psignal
51 #define sys_siglist foil_gcc_siglist
58 #include "pathnames.h"
61 * rmjob - remove the specified jobs from the queue.
65 * Stuff for handling lprm specifications
67 static char root[] = "root";
68 static int all = 0; /* eliminate all files (root only) */
69 static int cur_daemon; /* daemon's pid */
70 static char current[7+MAXHOSTNAMELEN]; /* active control file name */
72 static void alarmhandler(int _signo);
73 static void do_unlink(char *_file);
74 static int isowner(char *_owner, char *_file, const char *_cfhost);
77 rmjob(const char *printer)
79 register int i, nitems;
81 struct dirent **files;
83 struct printer myprinter, *pp = &myprinter;
86 if ((i = getprintcap(printer, pp)) < 0)
87 fatal(pp, "getprintcap: %s", pcaperr(i));
88 if ((cp = checkremote(pp))) {
89 printf("Warning: %s\n", cp);
94 * If the format was `lprm -' and the user isn't the super-user,
95 * then fake things to look like he said `lprm user'.
99 all = 1; /* all files in local queue */
105 if (!strcmp(person, "-all")) {
106 if (from_host == local_host)
107 fatal(pp, "The login name \"-all\" is reserved");
108 all = 1; /* all those from 'from_host' */
113 if (chdir(pp->spool_dir) < 0)
114 fatal(pp, "cannot chdir to spool directory");
115 if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
116 fatal(pp, "cannot access spool directory");
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).
125 if (lockchk(pp, pp->lock_file) && chk(current)) {
127 assassinated = kill(cur_daemon, SIGINT) == 0;
130 fatal(pp, "cannot kill printer daemon");
135 for (i = 0; i < nitems; i++)
136 process(pp, files[i]->d_name);
140 * Restart the printer daemon if it was killed
142 if (assassinated && !startdaemon(pp))
143 fatal(pp, "cannot restart printer daemon\n");
148 * Process a lock file: collect the pid of the active
149 * daemon and the file name of the active spool entry.
150 * Return boolean indicating existence of a lock file.
153 lockchk(struct printer *pp, char *slockf)
159 if ((fp = fopen(slockf, "r")) == NULL) {
161 fatal(pp, "%s: %s", slockf, strerror(errno));
168 return(0); /* no daemon present */
170 cur_daemon = atoi(line);
171 if (kill(cur_daemon, 0) < 0 && errno != EPERM) {
173 return(0); /* no daemon present */
175 for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
188 * Process a control file.
191 process(const struct printer *pp, char *file)
198 if ((cfp = fopen(file, "r")) == NULL)
199 fatal(pp, "cannot open %s", file);
201 while (getline(cfp)) {
203 case 'U': /* unlink associated files */
204 if (strchr(line+1, '/') || strncmp(line+1, "df", 2))
214 do_unlink(char *file)
218 if (from_host != local_host)
219 printf("%s: ", local_host);
223 printf(ret ? "cannot dequeue %s\n" : "%s dequeued\n", file);
227 * Do the dirty work in checking
238 * Check for valid cf file name (mostly checking current).
240 if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f')
243 jnum = calc_jobnum(file, &cfhost);
244 if (all && (from_host == local_host || !strcmp(from_host, cfhost)))
248 * get the owner's name from the control file.
251 if ((cfp = fopen(file, "r")) == NULL)
254 while (getline(cfp)) {
262 if (users == 0 && requests == 0)
263 return(!strcmp(file, current) && isowner(line+1, file, cfhost));
265 * Check the request list
267 for (r = requ; r < &requ[requests]; r++)
268 if (*r == jnum && isowner(line+1, file, cfhost))
271 * Check to see if it's in the user list
273 for (u = user; u < &user[users]; u++)
274 if (!strcmp(*u, line+1) && isowner(line+1, file, cfhost))
280 * If root is removing a file on the local machine, allow it.
281 * If root is removing a file from a remote machine, only allow
282 * files sent from the remote machine to be removed.
283 * Normal users can only remove the file from where it was sent.
286 isowner(char *owner, char *file, const char *cfhost)
288 if (!strcmp(person, root) && (from_host == local_host ||
289 !strcmp(from_host, cfhost)))
291 if (!strcmp(person, owner) && !strcmp(from_host, cfhost))
293 if (from_host != local_host)
294 printf("%s: ", local_host);
295 printf("%s: Permission denied\n", file);
300 * Check to see if we are sending files to a remote machine. If we are,
301 * then try removing files on the remote machine.
304 rmremote(const struct printer *pp)
306 int i, elem, firstreq, niov, rem, totlen;
308 void (*savealrm)(int);
312 return; /* not sending to a remote machine */
315 * Flush stdout so the user can see what has been deleted
316 * while we wait (possibly) for the connection.
322 * 4 == "\5" + remote_queue + " " + person
323 * 2 * users == " " + user[i] for each user
324 * requests == asprintf results for each request
326 * Although laborious, doing it this way makes it possible for
327 * us to process requests of indeterminate length without
328 * applying an arbitrary limit. Arbitrary Limits Are Bad (tm).
331 niov = 4 + 2 * users + requests + 1;
333 niov = 4 + requests + 1;
334 iov = malloc(niov * sizeof *iov);
336 fatal(pp, "out of memory in rmremote()");
337 iov[0].iov_base = "\5";
338 iov[1].iov_base = pp->remote_queue;
339 iov[2].iov_base = " ";
340 iov[3].iov_base = all ? "-all" : person;
342 for (i = 0; i < users; i++) {
343 iov[elem].iov_base = " ";
344 iov[elem + 1].iov_base = user[i];
348 for (i = 0; i < requests; i++) {
349 asprintf((char **)&iov[elem].iov_base, " %d", requ[i]);
350 if (iov[elem].iov_base == 0)
351 fatal(pp, "out of memory in rmremote()");
354 iov[elem++].iov_base = "\n";
355 for (totlen = i = 0; i < niov; i++)
356 totlen += (iov[i].iov_len = strlen(iov[i].iov_base));
358 savealrm = signal(SIGALRM, alarmhandler);
359 alarm(pp->conn_timeout);
360 rem = getport(pp, pp->remote_host, 0);
361 (void)signal(SIGALRM, savealrm);
363 if (from_host != local_host)
364 printf("%s: ", local_host);
365 printf("connection to %s is down\n", pp->remote_host);
367 if (writev(rem, iov, niov) != totlen)
368 fatal(pp, "Lost connection");
369 while ((i = read(rem, buf, sizeof(buf))) > 0)
370 (void) fwrite(buf, 1, i, stdout);
373 for (i = 0; i < requests; i++)
374 free(iov[firstreq + i].iov_base);
379 * Return 1 if the filename begins with 'cf'
382 iscf(const struct dirent *d)
384 return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
388 alarmhandler(int signo __unused)
390 /* the signal is ignored */
391 /* (the '__unused' is just to avoid a compile-time warning) */