2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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34 static char sccsid[] = "@(#)rmjob.c 8.2 (Berkeley) 4/28/95";
38 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
39 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
52 #define psignal foil_gcc_psignal
53 #define sys_siglist foil_gcc_siglist
60 #include "pathnames.h"
63 * rmjob - remove the specified jobs from the queue.
67 * Stuff for handling lprm specifications
69 static char root[] = "root";
70 static int all = 0; /* eliminate all files (root only) */
71 static int cur_daemon; /* daemon's pid */
72 static char current[7+MAXHOSTNAMELEN]; /* active control file name */
74 static void alarmhandler(int _signo);
75 static void do_unlink(char *_file);
76 static int isowner(char *_owner, char *_file, const char *_cfhost);
79 rmjob(const char *printer)
81 register int i, nitems;
83 struct dirent **files;
85 struct printer myprinter, *pp = &myprinter;
88 if ((i = getprintcap(printer, pp)) < 0)
89 fatal(pp, "getprintcap: %s", pcaperr(i));
90 if ((cp = checkremote(pp))) {
91 printf("Warning: %s\n", cp);
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'.
101 all = 1; /* all files in local queue */
107 if (!strcmp(person, "-all")) {
108 if (from_host == local_host)
109 fatal(pp, "The login name \"-all\" is reserved");
110 all = 1; /* all those from 'from_host' */
115 if (chdir(pp->spool_dir) < 0)
116 fatal(pp, "cannot chdir to spool directory");
117 if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
118 fatal(pp, "cannot access spool directory");
123 * Check for an active printer daemon (in which case we
124 * kill it if it is reading our file) then remove stuff
125 * (after which we have to restart the daemon).
127 if (lockchk(pp, pp->lock_file) && chk(current)) {
129 assassinated = kill(cur_daemon, SIGINT) == 0;
132 fatal(pp, "cannot kill printer daemon");
137 for (i = 0; i < nitems; i++)
138 process(pp, files[i]->d_name);
142 * Restart the printer daemon if it was killed
144 if (assassinated && !startdaemon(pp))
145 fatal(pp, "cannot restart printer daemon\n");
150 * Process a lock file: collect the pid of the active
151 * daemon and the file name of the active spool entry.
152 * Return boolean indicating existence of a lock file.
155 lockchk(struct printer *pp, char *slockf)
161 if ((fp = fopen(slockf, "r")) == NULL) {
163 fatal(pp, "%s: %s", slockf, strerror(errno));
170 return(0); /* no daemon present */
172 cur_daemon = atoi(line);
173 if (kill(cur_daemon, 0) < 0 && errno != EPERM) {
175 return(0); /* no daemon present */
177 for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
190 * Process a control file.
193 process(const struct printer *pp, char *file)
200 if ((cfp = fopen(file, "r")) == NULL)
201 fatal(pp, "cannot open %s", file);
203 while (get_line(cfp)) {
205 case 'U': /* unlink associated files */
206 if (strchr(line+1, '/') || strncmp(line+1, "df", 2))
216 do_unlink(char *file)
220 if (from_host != local_host)
221 printf("%s: ", local_host);
225 printf(ret ? "cannot dequeue %s\n" : "%s dequeued\n", file);
229 * Do the dirty work in checking
240 * Check for valid cf file name (mostly checking current).
242 if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f')
245 jnum = calc_jobnum(file, &cfhost);
246 if (all && (from_host == local_host || !strcmp(from_host, cfhost)))
250 * get the owner's name from the control file.
253 if ((cfp = fopen(file, "r")) == NULL)
256 while (get_line(cfp)) {
264 if (users == 0 && requests == 0)
265 return(!strcmp(file, current) && isowner(line+1, file, cfhost));
267 * Check the request list
269 for (r = requ; r < &requ[requests]; r++)
270 if (*r == jnum && isowner(line+1, file, cfhost))
273 * Check to see if it's in the user list
275 for (u = user; u < &user[users]; u++)
276 if (!strcmp(*u, line+1) && isowner(line+1, file, cfhost))
282 * If root is removing a file on the local machine, allow it.
283 * If root is removing a file from a remote machine, only allow
284 * files sent from the remote machine to be removed.
285 * Normal users can only remove the file from where it was sent.
288 isowner(char *owner, char *file, const char *cfhost)
290 if (!strcmp(person, root) && (from_host == local_host ||
291 !strcmp(from_host, cfhost)))
293 if (!strcmp(person, owner) && !strcmp(from_host, cfhost))
295 if (from_host != local_host)
296 printf("%s: ", local_host);
297 printf("%s: Permission denied\n", file);
302 * Check to see if we are sending files to a remote machine. If we are,
303 * then try removing files on the remote machine.
306 rmremote(const struct printer *pp)
308 int i, elem, firstreq, niov, rem, totlen;
310 void (*savealrm)(int);
314 return; /* not sending to a remote machine */
317 * Flush stdout so the user can see what has been deleted
318 * while we wait (possibly) for the connection.
324 * 4 == "\5" + remote_queue + " " + person
325 * 2 * users == " " + user[i] for each user
326 * requests == asprintf results for each request
328 * Although laborious, doing it this way makes it possible for
329 * us to process requests of indeterminate length without
330 * applying an arbitrary limit. Arbitrary Limits Are Bad (tm).
333 niov = 4 + 2 * users + requests + 1;
335 niov = 4 + requests + 1;
336 iov = malloc(niov * sizeof *iov);
338 fatal(pp, "out of memory in rmremote()");
339 iov[0].iov_base = "\5";
340 iov[1].iov_base = pp->remote_queue;
341 iov[2].iov_base = " ";
342 iov[3].iov_base = all ? "-all" : person;
344 for (i = 0; i < users; i++) {
345 iov[elem].iov_base = " ";
346 iov[elem + 1].iov_base = user[i];
350 for (i = 0; i < requests; i++) {
351 asprintf((char **)&iov[elem].iov_base, " %d", requ[i]);
352 if (iov[elem].iov_base == 0)
353 fatal(pp, "out of memory in rmremote()");
356 iov[elem++].iov_base = "\n";
357 for (totlen = i = 0; i < niov; i++)
358 totlen += (iov[i].iov_len = strlen(iov[i].iov_base));
360 savealrm = signal(SIGALRM, alarmhandler);
361 alarm(pp->conn_timeout);
362 rem = getport(pp, pp->remote_host, 0);
363 (void)signal(SIGALRM, savealrm);
365 if (from_host != local_host)
366 printf("%s: ", local_host);
367 printf("connection to %s is down\n", pp->remote_host);
369 if (writev(rem, iov, niov) != totlen)
370 fatal(pp, "Lost connection");
371 while ((i = read(rem, buf, sizeof(buf))) > 0)
372 (void) fwrite(buf, 1, i, stdout);
375 for (i = 0; i < requests; i++)
376 free(iov[firstreq + i].iov_base);
381 * Return 1 if the filename begins with 'cf'
384 iscf(const struct dirent *d)
386 return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
390 alarmhandler(int signo __unused)
392 /* the signal is ignored */
393 /* (the '__unused' is just to avoid a compile-time warning) */