2 * Copyright (c) 1983, 1993
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33 * @(#)rmjob.c 8.2 (Berkeley) 4/28/95
34 * $FreeBSD: src/usr.sbin/lpr/common_source/rmjob.c,v 1.12.2.5 2001/06/25 01:00:56 gad Exp $
37 #include <sys/param.h>
47 #define psignal foil_gcc_psignal
48 #define sys_siglist foil_gcc_siglist
55 #include "pathnames.h"
58 * rmjob - remove the specified jobs from the queue.
62 * Stuff for handling lprm specifications
64 static char root[] = "root";
65 static int all = 0; /* eliminate all files (root only) */
66 static int cur_daemon; /* daemon's pid */
67 static char current[7+MAXHOSTNAMELEN]; /* active control file name */
69 extern uid_t uid, euid; /* real and effective user id's */
71 static void alarmhandler(int _signo);
72 static void do_unlink(char *_file);
75 rmjob(const char *printer)
79 struct dirent **files;
81 struct printer myprinter, *pp = &myprinter;
84 if ((i = getprintcap(printer, pp)) < 0)
85 fatal(pp, "getprintcap: %s", pcaperr(i));
86 if ((cp = checkremote(pp))) {
87 printf("Warning: %s\n", cp);
92 * If the format was `lprm -' and the user isn't the super-user,
93 * then fake things to look like he said `lprm user'.
97 all = 1; /* all files in local queue */
103 if (!strcmp(person, "-all")) {
104 if (from_host == local_host)
105 fatal(pp, "The login name \"-all\" is reserved");
106 all = 1; /* all those from 'from_host' */
111 if (chdir(pp->spool_dir) < 0)
112 fatal(pp, "cannot chdir to spool directory");
113 if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
114 fatal(pp, "cannot access spool directory");
119 * Check for an active printer daemon (in which case we
120 * kill it if it is reading our file) then remove stuff
121 * (after which we have to restart the daemon).
123 if (lockchk(pp, pp->lock_file) && chk(current)) {
125 assasinated = kill(cur_daemon, SIGINT) == 0;
128 fatal(pp, "cannot kill printer daemon");
133 for (i = 0; i < nitems; i++)
134 process(pp, files[i]->d_name);
138 * Restart the printer daemon if it was killed
140 if (assasinated && !startdaemon(pp))
141 fatal(pp, "cannot restart printer daemon\n");
146 * Process a lock file: collect the pid of the active
147 * daemon and the file name of the active spool entry.
148 * Return boolean indicating existence of a lock file.
151 lockchk(struct printer *pp, char *slockf)
157 if ((fp = fopen(slockf, "r")) == NULL) {
159 fatal(pp, "%s: %s", slockf, strerror(errno));
166 return(0); /* no daemon present */
168 cur_daemon = atoi(line);
169 if (kill(cur_daemon, 0) < 0 && errno != EPERM) {
171 return(0); /* no daemon present */
173 for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
186 * Process a control file.
189 process(const struct printer *pp, char *file)
196 if ((cfp = fopen(file, "r")) == NULL)
197 fatal(pp, "cannot open %s", file);
199 while (getline(cfp)) {
201 case 'U': /* unlink associated files */
202 if (strchr(line+1, '/') || strncmp(line+1, "df", 2))
212 do_unlink(char *file)
216 if (from_host != local_host)
217 printf("%s: ", local_host);
221 printf(ret ? "cannot dequeue %s\n" : "%s dequeued\n", file);
225 * Do the dirty work in checking
235 * Check for valid cf file name (mostly checking current).
237 if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f')
240 if (all && (from_host == local_host || !strcmp(from_host, file+6)))
244 * get the owner's name from the control file.
247 if ((cfp = fopen(file, "r")) == NULL)
250 while (getline(cfp)) {
258 if (users == 0 && requests == 0)
259 return(!strcmp(file, current) && isowner(line+1, file));
261 * Check the request list
263 for (n = 0, cp = file+3; isdigit(*cp); )
264 n = n * 10 + (*cp++ - '0');
265 for (r = requ; r < &requ[requests]; r++)
266 if (*r == n && isowner(line+1, file))
269 * Check to see if it's in the user list
271 for (u = user; u < &user[users]; u++)
272 if (!strcmp(*u, line+1) && isowner(line+1, file))
278 * If root is removing a file on the local machine, allow it.
279 * If root is removing a file from a remote machine, only allow
280 * files sent from the remote machine to be removed.
281 * Normal users can only remove the file from where it was sent.
284 isowner(char *owner, char *file)
286 if (!strcmp(person, root) && (from_host == local_host ||
287 !strcmp(from_host, file+6)))
289 if (!strcmp(person, owner) && !strcmp(from_host, file+6))
291 if (from_host != local_host)
292 printf("%s: ", local_host);
293 printf("%s: Permission denied\n", file);
298 * Check to see if we are sending files to a remote machine. If we are,
299 * then try removing files on the remote machine.
302 rmremote(const struct printer *pp)
304 int i, elem, firstreq, niov, rem, totlen;
306 void (*savealrm)(int);
310 return; /* not sending to a remote machine */
313 * Flush stdout so the user can see what has been deleted
314 * while we wait (possibly) for the connection.
320 * 4 == "\5" + remote_queue + " " + person
321 * 2 * users == " " + user[i] for each user
322 * requests == asprintf results for each request
324 * Although laborious, doing it this way makes it possible for
325 * us to process requests of indeterminate length without
326 * applying an arbitrary limit. Arbitrary Limits Are Bad (tm).
329 niov = 4 + 2 * users + requests + 1;
331 niov = 4 + requests + 1;
332 iov = malloc(niov * sizeof *iov);
334 fatal(pp, "out of memory in rmremote()");
335 iov[0].iov_base = "\5";
336 iov[1].iov_base = pp->remote_queue;
337 iov[2].iov_base = " ";
338 iov[3].iov_base = all ? "-all" : person;
340 for (i = 0; i < users; i++) {
341 iov[elem].iov_base = " ";
342 iov[elem + 1].iov_base = user[i];
346 for (i = 0; i < requests; i++) {
347 asprintf((char **)&iov[elem].iov_base, " %d", requ[i]);
348 if (iov[elem].iov_base == 0)
349 fatal(pp, "out of memory in rmremote()");
352 iov[elem++].iov_base = "\n";
353 for (totlen = i = 0; i < niov; i++)
354 totlen += (iov[i].iov_len = strlen(iov[i].iov_base));
356 savealrm = signal(SIGALRM, alarmhandler);
357 alarm(pp->conn_timeout);
358 rem = getport(pp, pp->remote_host, 0);
359 signal(SIGALRM, savealrm);
361 if (from_host != local_host)
362 printf("%s: ", local_host);
363 printf("connection to %s is down\n", pp->remote_host);
365 if (writev(rem, iov, niov) != totlen)
366 fatal(pp, "Lost connection");
367 while ((i = read(rem, buf, sizeof(buf))) > 0)
368 fwrite(buf, 1, i, stdout);
371 for (i = 0; i < requests; i++)
372 free(iov[firstreq + i].iov_base);
377 * Return 1 if the filename begins with 'cf'
380 iscf(const struct dirent *d)
382 return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
386 alarmhandler(int signo __unused)
388 /* the signal is ignored */
389 /* (the '__unused' is just to avoid a compile-time warning) */