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";
47 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */
48 __FBSDID("$FreeBSD$");
51 * Receive printer jobs from the network, queue them and
52 * start the printer daemon.
54 #include <sys/param.h>
55 #include <sys/mount.h>
71 #include "pathnames.h"
73 #define ack() (void) write(STDOUT_FILENO, sp, (size_t)1);
76 * The buffer size to use when reading/writing spool files.
78 #define SPL_BUFSIZ BUFSIZ
80 static char dfname[NAME_MAX]; /* data files */
81 static int minfree; /* keep at least minfree blocks available */
82 static const char *sp = "";
83 static char tfname[NAME_MAX]; /* tmp copy of cf before linking */
85 static int chksize(int _size);
86 static void frecverr(const char *_msg, ...) __printf0like(1, 2);
87 static int noresponse(void);
88 static void rcleanup(int _signo);
89 static int read_number(const char *_fn);
90 static int readfile(struct printer *_pp, char *_file, size_t _size);
91 static int readjob(struct printer *_pp);
95 recvjob(const char *printer)
99 struct printer myprinter, *pp = &myprinter;
102 * Perform lookup for printer name or abbreviation
105 status = getprintcap(printer, pp);
108 frecverr("cannot open printer description file");
110 case PCAPERR_NOTFOUND:
111 frecverr("unknown printer %s", printer);
114 fatal(pp, "potential reference loop detected in printcap file");
119 (void) close(STDERR_FILENO); /* set up log file */
120 if (open(pp->log_file, O_WRONLY|O_APPEND, 0664) < 0) {
121 syslog(LOG_ERR, "%s: %m", pp->log_file);
122 (void) open(_PATH_DEVNULL, O_WRONLY);
125 if (chdir(pp->spool_dir) < 0)
126 frecverr("%s: chdir(%s): %s", pp->printer, pp->spool_dir,
128 if (stat(pp->lock_file, &stb) == 0) {
129 if (stb.st_mode & 010) {
130 /* queue is disabled */
131 putchar('\1'); /* return error code */
134 } else if (stat(pp->spool_dir, &stb) < 0)
135 frecverr("%s: stat(%s): %s", pp->printer, pp->spool_dir,
137 minfree = 2 * read_number("minfree"); /* scale KB to 512 blocks */
138 signal(SIGTERM, rcleanup);
139 signal(SIGPIPE, rcleanup);
146 * Read printer jobs sent by lpd and copy them to the spooling directory.
147 * Return the number of jobs successfully transfered.
150 readjob(struct printer *pp)
154 char *cp, *clastp, *errmsg;
155 char givenid[32], givenhost[MAXHOSTNAMELEN];
162 * Read a command to tell us what to do
165 clastp = line + sizeof(line) - 1;
167 size = read(STDOUT_FILENO, cp, (size_t)1);
168 if (size != (ssize_t)1) {
169 if (size < (ssize_t)0) {
170 frecverr("%s: lost connection",
176 } while ((*cp++ != '\n') && (cp <= clastp));
178 frecverr("%s: readjob overflow", pp->printer);
184 case '\1': /* cleanup because data sent was bad */
188 case '\2': /* read cf file */
191 while (*cp >= '0' && *cp <= '9')
192 size = size * 10 + (*cp++ - '0');
196 * host name has been authenticated, we use our
197 * view of the host name since we may be passed
198 * something different than what gethostbyaddr()
201 strlcpy(cp + 6, from_host, sizeof(line)
202 + (size_t)(line - cp - 6));
203 if (strchr(cp, '/')) {
204 frecverr("readjob: %s: illegal path name", cp);
207 strlcpy(tfname, cp, sizeof(tfname));
208 tfname[sizeof (tfname) - 1] = '\0';
210 if (!chksize(size)) {
211 (void) write(STDOUT_FILENO, "\2", (size_t)1);
214 if (!readfile(pp, tfname, (size_t)size)) {
218 errmsg = ctl_renametf(pp->printer, tfname);
220 if (errmsg != NULL) {
221 frecverr("%s: %s", pp->printer, errmsg);
227 case '\3': /* read df file */
231 while (*cp >= '0' && *cp <= '9')
232 size = size * 10 + (*cp++ - '0');
235 if (strchr(cp, '/')) {
236 frecverr("readjob: %s: illegal path name", cp);
239 if (!chksize(size)) {
240 (void) write(STDOUT_FILENO, "\2", (size_t)1);
243 strlcpy(dfname, cp, sizeof(dfname));
245 trstat_init(pp, dfname, dfcnt);
246 (void) readfile(pp, dfname, (size_t)size);
247 trstat_write(pp, TR_RECVING, (size_t)size, givenid,
248 from_host, givenhost);
251 frecverr("protocol screwup: %s", line);
257 * Read files send by lpd and copy them to the spooling directory.
260 readfile(struct printer *pp, char *file, size_t size)
263 char buf[SPL_BUFSIZ];
267 fd = open(file, O_CREAT|O_EXCL|O_WRONLY, FILMOD);
269 frecverr("%s: readfile: error on open(%s): %s",
270 pp->printer, file, strerror(errno));
275 for (i = 0; i < size; i += SPL_BUFSIZ) {
281 j = read(STDOUT_FILENO, cp, amt);
283 frecverr("%s: lost connection", pp->printer);
292 if (write(fd, buf, amt) != (ssize_t)amt) {
299 frecverr("%s: write error on close(%s)", pp->printer, file);
302 if (noresponse()) { /* file sent had bad data in it */
303 if (strchr(file, '/') == NULL)
316 if (read(STDOUT_FILENO, &resp, (size_t)1) != 1) {
317 frecverr("lost connection in noresponse()");
326 * Check to see if there is enough space on the disk for size bytes.
327 * 1 == OK, 0 == Not OK.
335 if (statfs(".", &sfb) < 0) {
336 syslog(LOG_ERR, "%s: %m", "statfs(\".\")");
339 spacefree = sfb.f_bavail * (sfb.f_bsize / 512);
340 size = (size + 511) / 512;
341 if (minfree + size > spacefree)
347 read_number(const char *fn)
352 if ((fp = fopen(fn, "r")) == NULL)
354 if (fgets(lin, sizeof(lin), fp) == NULL) {
363 * Remove all the files associated with the current job being transfered.
366 rcleanup(int signo __unused)
368 if (tfname[0] && strchr(tfname, '/') == NULL)
369 (void) unlink(tfname);
370 if (dfname[0] && strchr(dfname, '/') == NULL) {
373 (void) unlink(dfname);
374 while (dfname[2]-- != 'A');
376 } while (dfname[0]-- != 'd');
384 frecverr(const char *msg, ...)
388 syslog(LOG_ERR, "Error receiving job from %s:", from_host);
389 vsyslog(LOG_ERR, msg, ap);
392 * rcleanup is not called until AFTER logging the error message,
393 * because rcleanup will zap some variables which may have been
394 * supplied as parameters for that msg...
398 * Add a minimal delay before returning the final error code to
399 * the sending host. This just in case that machine responds
400 * this error by INSTANTLY retrying (and instantly re-failing...).
401 * It would be stupid of the sending host to do that, but if there
402 * was a broken implementation which did it, the result might be
403 * obscure performance problems and a flood of syslog messages on
404 * the receiving host.
406 sleep(2); /* a paranoid throttling measure */
407 putchar('\1'); /* return error code */