recvjob.c revision 68380
11553Srgrimes/* 21553Srgrimes * Copyright (c) 1983, 1993 31553Srgrimes * The Regents of the University of California. All rights reserved. 41553Srgrimes * 51553Srgrimes * 61553Srgrimes * Redistribution and use in source and binary forms, with or without 71553Srgrimes * modification, are permitted provided that the following conditions 81553Srgrimes * are met: 91553Srgrimes * 1. Redistributions of source code must retain the above copyright 101553Srgrimes * notice, this list of conditions and the following disclaimer. 111553Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 121553Srgrimes * notice, this list of conditions and the following disclaimer in the 131553Srgrimes * documentation and/or other materials provided with the distribution. 141553Srgrimes * 3. All advertising materials mentioning features or use of this software 151553Srgrimes * must display the following acknowledgement: 161553Srgrimes * This product includes software developed by the University of 171553Srgrimes * California, Berkeley and its contributors. 181553Srgrimes * 4. Neither the name of the University nor the names of its contributors 191553Srgrimes * may be used to endorse or promote products derived from this software 201553Srgrimes * without specific prior written permission. 211553Srgrimes * 221553Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 231553Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 241553Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 251553Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 261553Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 271553Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 281553Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 291553Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 301553Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 311553Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 321553Srgrimes * SUCH DAMAGE. 331553Srgrimes */ 341553Srgrimes 351553Srgrimes#ifndef lint 3629780Scharnierstatic const char copyright[] = 371553Srgrimes"@(#) Copyright (c) 1983, 1993\n\ 381553Srgrimes The Regents of the University of California. All rights reserved.\n"; 391553Srgrimes#endif /* not lint */ 401553Srgrimes 411553Srgrimes#ifndef lint 4229780Scharnier#if 0 4315648Sjoergstatic char sccsid[] = "@(#)recvjob.c 8.2 (Berkeley) 4/27/95"; 4429780Scharnier#endif 4529780Scharnierstatic const char rcsid[] = 4650479Speter "$FreeBSD: head/usr.sbin/lpr/lpd/recvjob.c 68380 2000-11-06 04:37:56Z gad $"; 471553Srgrimes#endif /* not lint */ 481553Srgrimes 491553Srgrimes/* 501553Srgrimes * Receive printer jobs from the network, queue them and 511553Srgrimes * start the printer daemon. 521553Srgrimes */ 531553Srgrimes#include <sys/param.h> 541553Srgrimes#include <sys/mount.h> 551553Srgrimes#include <sys/stat.h> 561553Srgrimes 571553Srgrimes#include <unistd.h> 581553Srgrimes#include <signal.h> 591553Srgrimes#include <fcntl.h> 601553Srgrimes#include <dirent.h> 611553Srgrimes#include <syslog.h> 621553Srgrimes#include <stdio.h> 631553Srgrimes#include <stdlib.h> 641553Srgrimes#include <string.h> 651553Srgrimes#include "lp.h" 661553Srgrimes#include "lp.local.h" 671553Srgrimes#include "extern.h" 681553Srgrimes#include "pathnames.h" 691553Srgrimes 701553Srgrimes#define ack() (void) write(1, sp, 1); 711553Srgrimes 7227748Simpstatic char dfname[NAME_MAX]; /* data files */ 731553Srgrimesstatic int minfree; /* keep at least minfree blocks available */ 741553Srgrimesstatic char *sp = ""; 7527748Simpstatic char tfname[NAME_MAX]; /* tmp copy of cf before linking */ 761553Srgrimes 771553Srgrimesstatic int chksize __P((int)); 781553Srgrimesstatic void frecverr __P((const char *, ...)); 791553Srgrimesstatic int noresponse __P((void)); 801553Srgrimesstatic void rcleanup __P((int)); 811553Srgrimesstatic int read_number __P((char *)); 8268380Sgadstatic int readfile __P((struct printer *pp, char *, int)); 8331492Swollmanstatic int readjob __P((struct printer *pp)); 841553Srgrimes 851553Srgrimes 861553Srgrimesvoid 8731492Swollmanrecvjob(printer) 8831492Swollman const char *printer; 891553Srgrimes{ 901553Srgrimes struct stat stb; 911553Srgrimes int status; 9231492Swollman struct printer myprinter, *pp = &myprinter; 931553Srgrimes 941553Srgrimes /* 951553Srgrimes * Perform lookup for printer name or abbreviation 961553Srgrimes */ 9732654Swollman init_printer(pp); 9831492Swollman status = getprintcap(printer, pp); 9931492Swollman switch (status) { 10031492Swollman case PCAPERR_OSERR: 1011553Srgrimes frecverr("cannot open printer description file"); 10231492Swollman break; 10331492Swollman case PCAPERR_NOTFOUND: 1041553Srgrimes frecverr("unknown printer %s", printer); 10531492Swollman break; 10631492Swollman case PCAPERR_TCLOOP: 10731492Swollman fatal(pp, "potential reference loop detected in printcap file"); 10831492Swollman default: 10931492Swollman break; 11031492Swollman } 11127748Simp 1121553Srgrimes (void) close(2); /* set up log file */ 11331492Swollman if (open(pp->log_file, O_WRONLY|O_APPEND, 0664) < 0) { 11431492Swollman syslog(LOG_ERR, "%s: %m", pp->log_file); 1151553Srgrimes (void) open(_PATH_DEVNULL, O_WRONLY); 1161553Srgrimes } 1171553Srgrimes 11831492Swollman if (chdir(pp->spool_dir) < 0) 11931492Swollman frecverr("%s: %s: %m", pp->printer, pp->spool_dir); 12031492Swollman if (stat(pp->lock_file, &stb) == 0) { 1211553Srgrimes if (stb.st_mode & 010) { 1221553Srgrimes /* queue is disabled */ 1231553Srgrimes putchar('\1'); /* return error code */ 1241553Srgrimes exit(1); 1251553Srgrimes } 12631492Swollman } else if (stat(pp->spool_dir, &stb) < 0) 12731492Swollman frecverr("%s: %s: %m", pp->printer, pp->spool_dir); 1281553Srgrimes minfree = 2 * read_number("minfree"); /* scale KB to 512 blocks */ 1291553Srgrimes signal(SIGTERM, rcleanup); 1301553Srgrimes signal(SIGPIPE, rcleanup); 1311553Srgrimes 13231492Swollman if (readjob(pp)) 13331492Swollman printjob(pp); 1341553Srgrimes} 1351553Srgrimes 1361553Srgrimes/* 1371553Srgrimes * Read printer jobs sent by lpd and copy them to the spooling directory. 1381553Srgrimes * Return the number of jobs successfully transfered. 1391553Srgrimes */ 1401553Srgrimesstatic int 14131492Swollmanreadjob(pp) 14231492Swollman struct printer *pp; 1431553Srgrimes{ 14468253Sgad register int size; 1451553Srgrimes register char *cp; 14668253Sgad int cfcnt, dfcnt; 14768253Sgad char givenid[32], givenhost[MAXHOSTNAMELEN]; 1481553Srgrimes 1491553Srgrimes ack(); 15068253Sgad cfcnt = 0; 15168253Sgad dfcnt = 0; 1521553Srgrimes for (;;) { 1531553Srgrimes /* 1541553Srgrimes * Read a command to tell us what to do 1551553Srgrimes */ 1561553Srgrimes cp = line; 1571553Srgrimes do { 1581553Srgrimes if ((size = read(1, cp, 1)) != 1) { 15968380Sgad if (size < 0) { 16029780Scharnier frecverr("%s: lost connection", 16131492Swollman pp->printer); 16268380Sgad /*NOTREACHED*/ 16368380Sgad } 16468253Sgad return (cfcnt); 1651553Srgrimes } 16627748Simp } while (*cp++ != '\n' && (cp - line + 1) < sizeof(line)); 16768380Sgad if (cp - line + 1 >= sizeof(line)) { 16868380Sgad frecverr("%s: readjob overflow", pp->printer); 16968380Sgad /*NOTREACHED*/ 17068380Sgad } 1711553Srgrimes *--cp = '\0'; 1721553Srgrimes cp = line; 1731553Srgrimes switch (*cp++) { 1741553Srgrimes case '\1': /* cleanup because data sent was bad */ 1751553Srgrimes rcleanup(0); 1761553Srgrimes continue; 1771553Srgrimes 1781553Srgrimes case '\2': /* read cf file */ 1791553Srgrimes size = 0; 18068253Sgad dfcnt = 0; 1811553Srgrimes while (*cp >= '0' && *cp <= '9') 1821553Srgrimes size = size * 10 + (*cp++ - '0'); 1831553Srgrimes if (*cp++ != ' ') 1841553Srgrimes break; 1851553Srgrimes /* 1861553Srgrimes * host name has been authenticated, we use our 1871553Srgrimes * view of the host name since we may be passed 1881553Srgrimes * something different than what gethostbyaddr() 1891553Srgrimes * returns 1901553Srgrimes */ 19127748Simp strncpy(cp + 6, from, sizeof(line) + line - cp - 7); 19227748Simp line[sizeof(line) - 1 ] = '\0'; 19327748Simp strncpy(tfname, cp, sizeof(tfname) - 1); 19427748Simp tfname[sizeof (tfname) - 1] = '\0'; 1951553Srgrimes tfname[0] = 't'; 19627748Simp if (strchr(tfname, '/')) 19727748Simp frecverr("readjob: %s: illegal path name", 19827748Simp tfname); 1991553Srgrimes if (!chksize(size)) { 2001553Srgrimes (void) write(1, "\2", 1); 2011553Srgrimes continue; 2021553Srgrimes } 20368380Sgad if (!readfile(pp, tfname, size)) { 2041553Srgrimes rcleanup(0); 2051553Srgrimes continue; 2061553Srgrimes } 2071553Srgrimes if (link(tfname, cp) < 0) 2081553Srgrimes frecverr("%s: %m", tfname); 2091553Srgrimes (void) unlink(tfname); 2101553Srgrimes tfname[0] = '\0'; 21168253Sgad cfcnt++; 2121553Srgrimes continue; 2131553Srgrimes 2141553Srgrimes case '\3': /* read df file */ 21568253Sgad *givenid = '\0'; 21668253Sgad *givenhost = '\0'; 2171553Srgrimes size = 0; 2181553Srgrimes while (*cp >= '0' && *cp <= '9') 2191553Srgrimes size = size * 10 + (*cp++ - '0'); 2201553Srgrimes if (*cp++ != ' ') 2211553Srgrimes break; 2221553Srgrimes if (!chksize(size)) { 2231553Srgrimes (void) write(1, "\2", 1); 2241553Srgrimes continue; 2251553Srgrimes } 22627748Simp (void) strncpy(dfname, cp, sizeof(dfname) - 1); 22727748Simp dfname[sizeof(dfname) - 1] = '\0'; 22868380Sgad if (strchr(dfname, '/')) { 2291553Srgrimes frecverr("readjob: %s: illegal path name", 2301553Srgrimes dfname); 23168380Sgad /*NOTREACHED*/ 23268380Sgad } 23368253Sgad dfcnt++; 23468253Sgad trstat_init(pp, dfname, dfcnt); 23568380Sgad (void) readfile(pp, dfname, size); 23668253Sgad trstat_write(pp, TR_RECVING, size, givenid, from, 23768253Sgad givenhost); 2381553Srgrimes continue; 2391553Srgrimes } 2401553Srgrimes frecverr("protocol screwup: %s", line); 24168380Sgad /*NOTREACHED*/ 2421553Srgrimes } 2431553Srgrimes} 2441553Srgrimes 2451553Srgrimes/* 2461553Srgrimes * Read files send by lpd and copy them to the spooling directory. 2471553Srgrimes */ 2481553Srgrimesstatic int 24968380Sgadreadfile(pp, file, size) 25068380Sgad struct printer *pp; 2511553Srgrimes char *file; 2521553Srgrimes int size; 2531553Srgrimes{ 2541553Srgrimes register char *cp; 2551553Srgrimes char buf[BUFSIZ]; 2561553Srgrimes register int i, j, amt; 2571553Srgrimes int fd, err; 2581553Srgrimes 2591553Srgrimes fd = open(file, O_CREAT|O_EXCL|O_WRONLY, FILMOD); 26068380Sgad if (fd < 0) { 26168380Sgad frecverr("%s: readfile: error on open(%s): %m", 26268380Sgad pp->printer, file); 26368380Sgad /*NOTREACHED*/ 26468380Sgad } 2651553Srgrimes ack(); 2661553Srgrimes err = 0; 2671553Srgrimes for (i = 0; i < size; i += BUFSIZ) { 2681553Srgrimes amt = BUFSIZ; 2691553Srgrimes cp = buf; 2701553Srgrimes if (i + amt > size) 2711553Srgrimes amt = size - i; 2721553Srgrimes do { 2731553Srgrimes j = read(1, cp, amt); 27468380Sgad if (j <= 0) { 27568380Sgad frecverr("%s: lost connection", pp->printer); 27668380Sgad /*NOTREACHED*/ 27768380Sgad } 2781553Srgrimes amt -= j; 2791553Srgrimes cp += j; 2801553Srgrimes } while (amt > 0); 2811553Srgrimes amt = BUFSIZ; 2821553Srgrimes if (i + amt > size) 2831553Srgrimes amt = size - i; 2841553Srgrimes if (write(fd, buf, amt) != amt) { 2851553Srgrimes err++; 2861553Srgrimes break; 2871553Srgrimes } 2881553Srgrimes } 2891553Srgrimes (void) close(fd); 29068380Sgad if (err) { 29168380Sgad frecverr("%s: write error on close(%s)", pp->printer, file); 29268380Sgad /*NOTREACHED*/ 29368380Sgad } 2941553Srgrimes if (noresponse()) { /* file sent had bad data in it */ 29530143Simp if (strchr(file, '/') == NULL) 29630143Simp (void) unlink(file); 29768380Sgad return (0); 2981553Srgrimes } 2991553Srgrimes ack(); 30068380Sgad return (1); 3011553Srgrimes} 3021553Srgrimes 3031553Srgrimesstatic int 3041553Srgrimesnoresponse() 3051553Srgrimes{ 3061553Srgrimes char resp; 3071553Srgrimes 30868380Sgad if (read(1, &resp, 1) != 1) { 30968380Sgad frecverr("lost connection in noresponse()"); 31068380Sgad /*NOTREACHED*/ 31168380Sgad } 3121553Srgrimes if (resp == '\0') 3131553Srgrimes return(0); 3141553Srgrimes return(1); 3151553Srgrimes} 3161553Srgrimes 3171553Srgrimes/* 3181553Srgrimes * Check to see if there is enough space on the disk for size bytes. 3191553Srgrimes * 1 == OK, 0 == Not OK. 3201553Srgrimes */ 3211553Srgrimesstatic int 3221553Srgrimeschksize(size) 3231553Srgrimes int size; 3241553Srgrimes{ 3251553Srgrimes int spacefree; 3261553Srgrimes struct statfs sfb; 3271553Srgrimes 3281553Srgrimes if (statfs(".", &sfb) < 0) { 3291553Srgrimes syslog(LOG_ERR, "%s: %m", "statfs(\".\")"); 3301553Srgrimes return (1); 3311553Srgrimes } 3321553Srgrimes spacefree = sfb.f_bavail * (sfb.f_bsize / 512); 3331553Srgrimes size = (size + 511) / 512; 3341553Srgrimes if (minfree + size > spacefree) 3351553Srgrimes return(0); 3361553Srgrimes return(1); 3371553Srgrimes} 3381553Srgrimes 3391553Srgrimesstatic int 3401553Srgrimesread_number(fn) 3411553Srgrimes char *fn; 3421553Srgrimes{ 3431553Srgrimes char lin[80]; 3441553Srgrimes register FILE *fp; 3451553Srgrimes 3461553Srgrimes if ((fp = fopen(fn, "r")) == NULL) 3471553Srgrimes return (0); 3481553Srgrimes if (fgets(lin, 80, fp) == NULL) { 3491553Srgrimes fclose(fp); 3501553Srgrimes return (0); 3511553Srgrimes } 3521553Srgrimes fclose(fp); 3531553Srgrimes return (atoi(lin)); 3541553Srgrimes} 3551553Srgrimes 3561553Srgrimes/* 3571553Srgrimes * Remove all the files associated with the current job being transfered. 3581553Srgrimes */ 3591553Srgrimesstatic void 3601553Srgrimesrcleanup(signo) 3611553Srgrimes int signo; 3621553Srgrimes{ 36330143Simp if (tfname[0] && strchr(tfname, '/') == NULL) 3641553Srgrimes (void) unlink(tfname); 36530143Simp if (dfname[0] && strchr(dfname, '/') == NULL) { 3661553Srgrimes do { 3671553Srgrimes do 3681553Srgrimes (void) unlink(dfname); 3691553Srgrimes while (dfname[2]-- != 'A'); 3701553Srgrimes dfname[2] = 'z'; 3711553Srgrimes } while (dfname[0]-- != 'd'); 37230143Simp } 3731553Srgrimes dfname[0] = '\0'; 3741553Srgrimes} 3751553Srgrimes 37627757Simp#ifdef __STDC__ 3771553Srgrimes#include <stdarg.h> 3781553Srgrimes#else 3791553Srgrimes#include <varargs.h> 3801553Srgrimes#endif 3811553Srgrimes 3821553Srgrimesstatic void 38327757Simp#ifdef __STDC__ 3841553Srgrimesfrecverr(const char *msg, ...) 3851553Srgrimes#else 3861553Srgrimesfrecverr(msg, va_alist) 3871553Srgrimes char *msg; 3881553Srgrimes va_dcl 3891553Srgrimes#endif 3901553Srgrimes{ 3911553Srgrimes va_list ap; 39227757Simp#ifdef __STDC__ 3931553Srgrimes va_start(ap, msg); 3941553Srgrimes#else 3951553Srgrimes va_start(ap); 3961553Srgrimes#endif 39768340Sgad syslog(LOG_ERR, "Error receiving job from %s:", fromb); 3981553Srgrimes vsyslog(LOG_ERR, msg, ap); 3991553Srgrimes va_end(ap); 40068340Sgad /* 40168340Sgad * rcleanup is not called until AFTER logging the error message, 40268340Sgad * because rcleanup will zap some variables which may have been 40368340Sgad * supplied as parameters for that msg... 40468340Sgad */ 40568340Sgad rcleanup(0); 40668340Sgad /* 40768340Sgad * Add a minimal delay before returning the final error code to 40868340Sgad * the sending host. This just in case that machine responds 40968340Sgad * this error by INSTANTLY retrying (and instantly re-failing...). 41068340Sgad * It would be stupid of the sending host to do that, but if there 41168340Sgad * was a broken implementation which did it, the result might be 41268340Sgad * obscure performance problems and a flood of syslog messages on 41368340Sgad * the receiving host. 41468340Sgad */ 41568340Sgad sleep(2); /* a paranoid throttling measure */ 4161553Srgrimes putchar('\1'); /* return error code */ 4171553Srgrimes exit(1); 4181553Srgrimes} 419