2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static const char copyright[] =
37 "@(#) Copyright (c) 1983, 1993\n\
38 The Regents of the University of California. All rights reserved.\n";
43 static char sccsid[] = "@(#)recvjob.c 8.2 (Berkeley) 4/27/95";
45 static const char rcsid[] =
46 "$FreeBSD: src/usr.sbin/lpr/lpd/recvjob.c,v 1.14.2.13 2002/06/19 01:46:48 gad Exp $";
50 * Receive printer jobs from the network, queue them and
51 * start the printer daemon.
53 #include <sys/param.h>
54 #include <sys/mount.h>
70 #include "pathnames.h"
72 #define ack() (void) write(STDOUT_FILENO, sp, (size_t)1);
74 static char dfname[NAME_MAX]; /* data files */
75 static int minfree; /* keep at least minfree blocks available */
76 static const char *sp = "";
77 static char tfname[NAME_MAX]; /* tmp copy of cf before linking */
79 static int chksize(int _size);
80 static void frecverr(const char *_msg, ...) __printf0like(1, 2);
81 static int noresponse(void);
82 static void rcleanup(int _signo);
83 static int read_number(const char *_fn);
84 static int readfile(struct printer *_pp, char *_file, size_t _size);
85 static int readjob(struct printer *_pp);
89 recvjob(const char *printer)
93 struct printer myprinter, *pp = &myprinter;
96 * Perform lookup for printer name or abbreviation
99 status = getprintcap(printer, pp);
102 frecverr("cannot open printer description file");
104 case PCAPERR_NOTFOUND:
105 frecverr("unknown printer %s", printer);
108 fatal(pp, "potential reference loop detected in printcap file");
113 (void) close(2); /* set up log file */
114 if (open(pp->log_file, O_WRONLY|O_APPEND, 0664) < 0) {
115 syslog(LOG_ERR, "%s: %m", pp->log_file);
116 (void) open(_PATH_DEVNULL, O_WRONLY);
119 if (chdir(pp->spool_dir) < 0)
120 frecverr("%s: chdir(%s): %s", pp->printer, pp->spool_dir,
122 if (stat(pp->lock_file, &stb) == 0) {
123 if (stb.st_mode & 010) {
124 /* queue is disabled */
125 putchar('\1'); /* return error code */
128 } else if (stat(pp->spool_dir, &stb) < 0)
129 frecverr("%s: stat(%s): %s", pp->printer, pp->spool_dir,
131 minfree = 2 * read_number("minfree"); /* scale KB to 512 blocks */
132 signal(SIGTERM, rcleanup);
133 signal(SIGPIPE, rcleanup);
140 * Read printer jobs sent by lpd and copy them to the spooling directory.
141 * Return the number of jobs successfully transfered.
144 readjob(struct printer *pp)
148 char *cp, *clastp, *errmsg;
149 char givenid[32], givenhost[MAXHOSTNAMELEN];
156 * Read a command to tell us what to do
159 clastp = line + sizeof(line) - 1;
161 size = read(STDOUT_FILENO, cp, (size_t)1);
162 if (size != (ssize_t)1) {
163 if (size < (ssize_t)0) {
164 frecverr("%s: lost connection",
170 } while ((*cp++ != '\n') && (cp <= clastp));
172 frecverr("%s: readjob overflow", pp->printer);
178 case '\1': /* cleanup because data sent was bad */
182 case '\2': /* read cf file */
185 while (*cp >= '0' && *cp <= '9')
186 size = size * 10 + (*cp++ - '0');
190 * host name has been authenticated, we use our
191 * view of the host name since we may be passed
192 * something different than what gethostbyaddr()
195 strlcpy(cp + 6, from_host, sizeof(line)
196 + (size_t)(line - cp - 6));
197 if (strchr(cp, '/')) {
198 frecverr("readjob: %s: illegal path name", cp);
201 strlcpy(tfname, cp, sizeof(tfname));
202 tfname[sizeof (tfname) - 1] = '\0';
204 if (!chksize(size)) {
205 (void) write(STDOUT_FILENO, "\2", (size_t)1);
208 if (!readfile(pp, tfname, (size_t)size)) {
212 errmsg = ctl_renametf(pp->printer, tfname);
214 if (errmsg != NULL) {
215 frecverr("%s: %s", pp->printer, errmsg);
221 case '\3': /* read df file */
225 while (*cp >= '0' && *cp <= '9')
226 size = size * 10 + (*cp++ - '0');
229 if (strchr(cp, '/')) {
230 frecverr("readjob: %s: illegal path name", cp);
233 if (!chksize(size)) {
234 (void) write(STDOUT_FILENO, "\2", (size_t)1);
237 strlcpy(dfname, cp, sizeof(dfname));
239 trstat_init(pp, dfname, dfcnt);
240 (void) readfile(pp, dfname, (size_t)size);
241 trstat_write(pp, TR_RECVING, (size_t)size, givenid,
242 from_host, givenhost);
245 frecverr("protocol screwup: %s", line);
251 * Read files send by lpd and copy them to the spooling directory.
254 readfile(struct printer *pp, char *file, size_t size)
261 fd = open(file, O_CREAT|O_EXCL|O_WRONLY, FILMOD);
263 frecverr("%s: readfile: error on open(%s): %s",
264 pp->printer, file, strerror(errno));
269 for (i = 0; i < size; i += BUFSIZ) {
275 j = read(STDOUT_FILENO, cp, amt);
277 frecverr("%s: lost connection", pp->printer);
286 if (write(fd, buf, amt) != (ssize_t)amt) {
293 frecverr("%s: write error on close(%s)", pp->printer, file);
296 if (noresponse()) { /* file sent had bad data in it */
297 if (strchr(file, '/') == NULL)
310 if (read(STDOUT_FILENO, &resp, (size_t)1) != 1) {
311 frecverr("lost connection in noresponse()");
320 * Check to see if there is enough space on the disk for size bytes.
321 * 1 == OK, 0 == Not OK.
329 if (statfs(".", &sfb) < 0) {
330 syslog(LOG_ERR, "%s: %m", "statfs(\".\")");
333 spacefree = sfb.f_bavail * (sfb.f_bsize / 512);
334 size = (size + 511) / 512;
335 if (minfree + size > spacefree)
341 read_number(const char *fn)
346 if ((fp = fopen(fn, "r")) == NULL)
348 if (fgets(lin, 80, fp) == NULL) {
357 * Remove all the files associated with the current job being transfered.
360 rcleanup(int signo __unused)
362 if (tfname[0] && strchr(tfname, '/') == NULL)
363 (void) unlink(tfname);
364 if (dfname[0] && strchr(dfname, '/') == NULL) {
367 (void) unlink(dfname);
368 while (dfname[2]-- != 'A');
370 } while (dfname[0]-- != 'd');
378 frecverr(const char *msg, ...)
382 syslog(LOG_ERR, "Error receiving job from %s:", from_host);
383 vsyslog(LOG_ERR, msg, ap);
386 * rcleanup is not called until AFTER logging the error message,
387 * because rcleanup will zap some variables which may have been
388 * supplied as parameters for that msg...
392 * Add a minimal delay before returning the final error code to
393 * the sending host. This just in case that machine responds
394 * this error by INSTANTLY retrying (and instantly re-failing...).
395 * It would be stupid of the sending host to do that, but if there
396 * was a broken implementation which did it, the result might be
397 * obscure performance problems and a flood of syslog messages on
398 * the receiving host.
400 sleep(2); /* a paranoid throttling measure */
401 putchar('\1'); /* return error code */