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
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14 * may be used to endorse or promote products derived from this software
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17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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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>
49 #define psignal foil_gcc_psignal
50 #define sys_siglist foil_gcc_siglist
57 #include "pathnames.h"
60 * rmjob - remove the specified jobs from the queue.
64 * Stuff for handling lprm specifications
66 static char root[] = "root";
67 static int all = 0; /* eliminate all files (root only) */
68 static int cur_daemon; /* daemon's pid */
69 static char current[7+MAXHOSTNAMELEN]; /* active control file name */
71 extern uid_t uid, euid; /* real and effective user id's */
73 static void alarmhandler(int _signo);
74 static void do_unlink(char *_file);
75 static int isowner(char *_owner, char *_file, const char *_cfhost);
78 rmjob(const char *printer)
80 register int i, nitems;
82 struct dirent **files;
84 struct printer myprinter, *pp = &myprinter;
87 if ((i = getprintcap(printer, pp)) < 0)
88 fatal(pp, "getprintcap: %s", pcaperr(i));
89 if ((cp = checkremote(pp))) {
90 printf("Warning: %s\n", cp);
95 * If the format was `lprm -' and the user isn't the super-user,
96 * then fake things to look like he said `lprm user'.
100 all = 1; /* all files in local queue */
106 if (!strcmp(person, "-all")) {
107 if (from_host == local_host)
108 fatal(pp, "The login name \"-all\" is reserved");
109 all = 1; /* all those from 'from_host' */
114 if (chdir(pp->spool_dir) < 0)
115 fatal(pp, "cannot chdir to spool directory");
116 if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
117 fatal(pp, "cannot access spool directory");
122 * Check for an active printer daemon (in which case we
123 * kill it if it is reading our file) then remove stuff
124 * (after which we have to restart the daemon).
126 if (lockchk(pp, pp->lock_file) && chk(current)) {
128 assasinated = kill(cur_daemon, SIGINT) == 0;
131 fatal(pp, "cannot kill printer daemon");
136 for (i = 0; i < nitems; i++)
137 process(pp, files[i]->d_name);
141 * Restart the printer daemon if it was killed
143 if (assasinated && !startdaemon(pp))
144 fatal(pp, "cannot restart printer daemon\n");
149 * Process a lock file: collect the pid of the active
150 * daemon and the file name of the active spool entry.
151 * Return boolean indicating existence of a lock file.
154 lockchk(struct printer *pp, char *slockf)
160 if ((fp = fopen(slockf, "r")) == NULL) {
162 fatal(pp, "%s: %s", slockf, strerror(errno));
169 return(0); /* no daemon present */
171 cur_daemon = atoi(line);
172 if (kill(cur_daemon, 0) < 0 && errno != EPERM) {
174 return(0); /* no daemon present */
176 for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
189 * Process a control file.
192 process(const struct printer *pp, char *file)
199 if ((cfp = fopen(file, "r")) == NULL)
200 fatal(pp, "cannot open %s", file);
202 while (getline(cfp)) {
204 case 'U': /* unlink associated files */
205 if (strchr(line+1, '/') || strncmp(line+1, "df", 2))
215 do_unlink(char *file)
219 if (from_host != local_host)
220 printf("%s: ", local_host);
224 printf(ret ? "cannot dequeue %s\n" : "%s dequeued\n", file);
228 * Do the dirty work in checking
239 * Check for valid cf file name (mostly checking current).
241 if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f')
244 jnum = calc_jobnum(file, &cfhost);
245 if (all && (from_host == local_host || !strcmp(from_host, cfhost)))
249 * get the owner's name from the control file.
252 if ((cfp = fopen(file, "r")) == NULL)
255 while (getline(cfp)) {
263 if (users == 0 && requests == 0)
264 return(!strcmp(file, current) && isowner(line+1, file, cfhost));
266 * Check the request list
268 for (r = requ; r < &requ[requests]; r++)
269 if (*r == jnum && isowner(line+1, file, cfhost))
272 * Check to see if it's in the user list
274 for (u = user; u < &user[users]; u++)
275 if (!strcmp(*u, line+1) && isowner(line+1, file, cfhost))
281 * If root is removing a file on the local machine, allow it.
282 * If root is removing a file from a remote machine, only allow
283 * files sent from the remote machine to be removed.
284 * Normal users can only remove the file from where it was sent.
287 isowner(char *owner, char *file, const char *cfhost)
289 if (!strcmp(person, root) && (from_host == local_host ||
290 !strcmp(from_host, cfhost)))
292 if (!strcmp(person, owner) && !strcmp(from_host, cfhost))
294 if (from_host != local_host)
295 printf("%s: ", local_host);
296 printf("%s: Permission denied\n", file);
301 * Check to see if we are sending files to a remote machine. If we are,
302 * then try removing files on the remote machine.
305 rmremote(const struct printer *pp)
307 int i, elem, firstreq, niov, rem, totlen;
309 void (*savealrm)(int);
313 return; /* not sending to a remote machine */
316 * Flush stdout so the user can see what has been deleted
317 * while we wait (possibly) for the connection.
323 * 4 == "\5" + remote_queue + " " + person
324 * 2 * users == " " + user[i] for each user
325 * requests == asprintf results for each request
327 * Although laborious, doing it this way makes it possible for
328 * us to process requests of indeterminate length without
329 * applying an arbitrary limit. Arbitrary Limits Are Bad (tm).
332 niov = 4 + 2 * users + requests + 1;
334 niov = 4 + requests + 1;
335 iov = malloc(niov * sizeof *iov);
337 fatal(pp, "out of memory in rmremote()");
338 iov[0].iov_base = "\5";
339 iov[1].iov_base = pp->remote_queue;
340 iov[2].iov_base = " ";
341 iov[3].iov_base = all ? "-all" : person;
343 for (i = 0; i < users; i++) {
344 iov[elem].iov_base = " ";
345 iov[elem + 1].iov_base = user[i];
349 for (i = 0; i < requests; i++) {
350 asprintf((char **)&iov[elem].iov_base, " %d", requ[i]);
351 if (iov[elem].iov_base == 0)
352 fatal(pp, "out of memory in rmremote()");
355 iov[elem++].iov_base = "\n";
356 for (totlen = i = 0; i < niov; i++)
357 totlen += (iov[i].iov_len = strlen(iov[i].iov_base));
359 savealrm = signal(SIGALRM, alarmhandler);
360 alarm(pp->conn_timeout);
361 rem = getport(pp, pp->remote_host, 0);
362 (void)signal(SIGALRM, savealrm);
364 if (from_host != local_host)
365 printf("%s: ", local_host);
366 printf("connection to %s is down\n", pp->remote_host);
368 if (writev(rem, iov, niov) != totlen)
369 fatal(pp, "Lost connection");
370 while ((i = read(rem, buf, sizeof(buf))) > 0)
371 (void) fwrite(buf, 1, i, stdout);
374 for (i = 0; i < requests; i++)
375 free(iov[firstreq + i].iov_base);
380 * Return 1 if the filename begins with 'cf'
383 iscf(const struct dirent *d)
385 return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
389 alarmhandler(int signo __unused)
391 /* the signal is ignored */
392 /* (the '__unused' is just to avoid a compile-time warning) */