recvjob.c revision 79739
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 79739 2001-07-15 00:09:46Z 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> 6179739Sgad#include <errno.h> 621553Srgrimes#include <syslog.h> 631553Srgrimes#include <stdio.h> 641553Srgrimes#include <stdlib.h> 651553Srgrimes#include <string.h> 661553Srgrimes#include "lp.h" 671553Srgrimes#include "lp.local.h" 681553Srgrimes#include "extern.h" 691553Srgrimes#include "pathnames.h" 701553Srgrimes 711553Srgrimes#define ack() (void) write(1, sp, 1); 721553Srgrimes 7327748Simpstatic char dfname[NAME_MAX]; /* data files */ 741553Srgrimesstatic int minfree; /* keep at least minfree blocks available */ 7578146Sgadstatic const char *sp = ""; 7627748Simpstatic char tfname[NAME_MAX]; /* tmp copy of cf before linking */ 771553Srgrimes 7878146Sgadstatic int chksize(int _size); 7979739Sgadstatic void frecverr(const char *_msg, ...) __printf0like(1, 2); 8078146Sgadstatic int noresponse(void); 8178146Sgadstatic void rcleanup(int _signo); 8278146Sgadstatic int read_number(const char *_fn); 8378146Sgadstatic int readfile(struct printer *_pp, char *_file, int _size); 8478146Sgadstatic int readjob(struct printer *_pp); 851553Srgrimes 861553Srgrimes 871553Srgrimesvoid 8878146Sgadrecvjob(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) 11979739Sgad frecverr("%s: chdir(%s): %s", pp->printer, pp->spool_dir, 12079739Sgad strerror(errno)); 12131492Swollman if (stat(pp->lock_file, &stb) == 0) { 1221553Srgrimes if (stb.st_mode & 010) { 1231553Srgrimes /* queue is disabled */ 1241553Srgrimes putchar('\1'); /* return error code */ 1251553Srgrimes exit(1); 1261553Srgrimes } 12731492Swollman } else if (stat(pp->spool_dir, &stb) < 0) 12879739Sgad frecverr("%s: stat(%s): %s", pp->printer, pp->spool_dir, 12979739Sgad strerror(errno)); 1301553Srgrimes minfree = 2 * read_number("minfree"); /* scale KB to 512 blocks */ 1311553Srgrimes signal(SIGTERM, rcleanup); 1321553Srgrimes signal(SIGPIPE, rcleanup); 1331553Srgrimes 13431492Swollman if (readjob(pp)) 13531492Swollman printjob(pp); 1361553Srgrimes} 1371553Srgrimes 1381553Srgrimes/* 1391553Srgrimes * Read printer jobs sent by lpd and copy them to the spooling directory. 1401553Srgrimes * Return the number of jobs successfully transfered. 1411553Srgrimes */ 1421553Srgrimesstatic int 14378146Sgadreadjob(struct printer *pp) 1441553Srgrimes{ 14568253Sgad register int size; 1461553Srgrimes register char *cp; 14768735Sgad int cfcnt, dfcnt; 14868735Sgad char givenid[32], givenhost[MAXHOSTNAMELEN]; 1491553Srgrimes 1501553Srgrimes ack(); 15168253Sgad cfcnt = 0; 15268253Sgad dfcnt = 0; 1531553Srgrimes for (;;) { 1541553Srgrimes /* 1551553Srgrimes * Read a command to tell us what to do 1561553Srgrimes */ 1571553Srgrimes cp = line; 1581553Srgrimes do { 1591553Srgrimes if ((size = read(1, cp, 1)) != 1) { 16068380Sgad if (size < 0) { 16129780Scharnier frecverr("%s: lost connection", 16231492Swollman pp->printer); 16368380Sgad /*NOTREACHED*/ 16468380Sgad } 16568253Sgad return (cfcnt); 1661553Srgrimes } 16727748Simp } while (*cp++ != '\n' && (cp - line + 1) < sizeof(line)); 16868380Sgad if (cp - line + 1 >= sizeof(line)) { 16968380Sgad frecverr("%s: readjob overflow", pp->printer); 17068380Sgad /*NOTREACHED*/ 17168380Sgad } 1721553Srgrimes *--cp = '\0'; 1731553Srgrimes cp = line; 1741553Srgrimes switch (*cp++) { 1751553Srgrimes case '\1': /* cleanup because data sent was bad */ 1761553Srgrimes rcleanup(0); 1771553Srgrimes continue; 1781553Srgrimes 1791553Srgrimes case '\2': /* read cf file */ 1801553Srgrimes size = 0; 18168253Sgad dfcnt = 0; 1821553Srgrimes while (*cp >= '0' && *cp <= '9') 1831553Srgrimes size = size * 10 + (*cp++ - '0'); 1841553Srgrimes if (*cp++ != ' ') 1851553Srgrimes break; 1861553Srgrimes /* 1871553Srgrimes * host name has been authenticated, we use our 1881553Srgrimes * view of the host name since we may be passed 1891553Srgrimes * something different than what gethostbyaddr() 1901553Srgrimes * returns 1911553Srgrimes */ 19278300Sgad strncpy(cp + 6, from_host, sizeof(line) + line - cp 19378300Sgad - 7); 19427748Simp line[sizeof(line) - 1 ] = '\0'; 19527748Simp strncpy(tfname, cp, sizeof(tfname) - 1); 19627748Simp tfname[sizeof (tfname) - 1] = '\0'; 1971553Srgrimes tfname[0] = 't'; 19827748Simp if (strchr(tfname, '/')) 19927748Simp frecverr("readjob: %s: illegal path name", 20027748Simp tfname); 2011553Srgrimes if (!chksize(size)) { 2021553Srgrimes (void) write(1, "\2", 1); 2031553Srgrimes continue; 2041553Srgrimes } 20568380Sgad if (!readfile(pp, tfname, size)) { 2061553Srgrimes rcleanup(0); 2071553Srgrimes continue; 2081553Srgrimes } 2091553Srgrimes if (link(tfname, cp) < 0) 21079739Sgad frecverr("%s: link(%s): %s", pp->printer, 21179739Sgad tfname, strerror(errno)); 2121553Srgrimes (void) unlink(tfname); 2131553Srgrimes tfname[0] = '\0'; 21468253Sgad cfcnt++; 2151553Srgrimes continue; 2161553Srgrimes 2171553Srgrimes case '\3': /* read df file */ 21868253Sgad *givenid = '\0'; 21968253Sgad *givenhost = '\0'; 2201553Srgrimes size = 0; 2211553Srgrimes while (*cp >= '0' && *cp <= '9') 2221553Srgrimes size = size * 10 + (*cp++ - '0'); 2231553Srgrimes if (*cp++ != ' ') 2241553Srgrimes break; 2251553Srgrimes if (!chksize(size)) { 2261553Srgrimes (void) write(1, "\2", 1); 2271553Srgrimes continue; 2281553Srgrimes } 22927748Simp (void) strncpy(dfname, cp, sizeof(dfname) - 1); 23027748Simp dfname[sizeof(dfname) - 1] = '\0'; 23168380Sgad if (strchr(dfname, '/')) { 2321553Srgrimes frecverr("readjob: %s: illegal path name", 2331553Srgrimes dfname); 23468380Sgad /*NOTREACHED*/ 23568380Sgad } 23668253Sgad dfcnt++; 23768253Sgad trstat_init(pp, dfname, dfcnt); 23868380Sgad (void) readfile(pp, dfname, size); 23978300Sgad trstat_write(pp, TR_RECVING, size, givenid, from_host, 24068253Sgad givenhost); 2411553Srgrimes continue; 2421553Srgrimes } 2431553Srgrimes frecverr("protocol screwup: %s", line); 24468380Sgad /*NOTREACHED*/ 2451553Srgrimes } 2461553Srgrimes} 2471553Srgrimes 2481553Srgrimes/* 2491553Srgrimes * Read files send by lpd and copy them to the spooling directory. 2501553Srgrimes */ 2511553Srgrimesstatic int 25278146Sgadreadfile(struct printer *pp, char *file, 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) { 26179739Sgad frecverr("%s: readfile: error on open(%s): %s", 26279739Sgad pp->printer, file, strerror(errno)); 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 30478146Sgadnoresponse(void) 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 32278146Sgadchksize(int size) 3231553Srgrimes{ 3241553Srgrimes int spacefree; 3251553Srgrimes struct statfs sfb; 3261553Srgrimes 3271553Srgrimes if (statfs(".", &sfb) < 0) { 3281553Srgrimes syslog(LOG_ERR, "%s: %m", "statfs(\".\")"); 3291553Srgrimes return (1); 3301553Srgrimes } 3311553Srgrimes spacefree = sfb.f_bavail * (sfb.f_bsize / 512); 3321553Srgrimes size = (size + 511) / 512; 3331553Srgrimes if (minfree + size > spacefree) 3341553Srgrimes return(0); 3351553Srgrimes return(1); 3361553Srgrimes} 3371553Srgrimes 3381553Srgrimesstatic int 33978146Sgadread_number(const char *fn) 3401553Srgrimes{ 3411553Srgrimes char lin[80]; 3421553Srgrimes register FILE *fp; 3431553Srgrimes 3441553Srgrimes if ((fp = fopen(fn, "r")) == NULL) 3451553Srgrimes return (0); 3461553Srgrimes if (fgets(lin, 80, fp) == NULL) { 3471553Srgrimes fclose(fp); 3481553Srgrimes return (0); 3491553Srgrimes } 3501553Srgrimes fclose(fp); 3511553Srgrimes return (atoi(lin)); 3521553Srgrimes} 3531553Srgrimes 3541553Srgrimes/* 3551553Srgrimes * Remove all the files associated with the current job being transfered. 3561553Srgrimes */ 3571553Srgrimesstatic void 35878146Sgadrcleanup(int signo __unused) 3591553Srgrimes{ 36030143Simp if (tfname[0] && strchr(tfname, '/') == NULL) 3611553Srgrimes (void) unlink(tfname); 36230143Simp if (dfname[0] && strchr(dfname, '/') == NULL) { 3631553Srgrimes do { 3641553Srgrimes do 3651553Srgrimes (void) unlink(dfname); 3661553Srgrimes while (dfname[2]-- != 'A'); 3671553Srgrimes dfname[2] = 'z'; 3681553Srgrimes } while (dfname[0]-- != 'd'); 36930143Simp } 3701553Srgrimes dfname[0] = '\0'; 3711553Srgrimes} 3721553Srgrimes 37327757Simp#ifdef __STDC__ 3741553Srgrimes#include <stdarg.h> 3751553Srgrimes#else 3761553Srgrimes#include <varargs.h> 3771553Srgrimes#endif 3781553Srgrimes 3791553Srgrimesstatic void 38027757Simp#ifdef __STDC__ 3811553Srgrimesfrecverr(const char *msg, ...) 3821553Srgrimes#else 3831553Srgrimesfrecverr(msg, va_alist) 3841553Srgrimes char *msg; 3851553Srgrimes va_dcl 3861553Srgrimes#endif 3871553Srgrimes{ 3881553Srgrimes va_list ap; 38927757Simp#ifdef __STDC__ 3901553Srgrimes va_start(ap, msg); 3911553Srgrimes#else 3921553Srgrimes va_start(ap); 3931553Srgrimes#endif 39478300Sgad syslog(LOG_ERR, "Error receiving job from %s:", from_host); 3951553Srgrimes vsyslog(LOG_ERR, msg, ap); 3961553Srgrimes va_end(ap); 39768340Sgad /* 39868735Sgad * rcleanup is not called until AFTER logging the error message, 39968735Sgad * because rcleanup will zap some variables which may have been 40068735Sgad * supplied as parameters for that msg... 40168340Sgad */ 40268340Sgad rcleanup(0); 40368340Sgad /* 40468340Sgad * Add a minimal delay before returning the final error code to 40568340Sgad * the sending host. This just in case that machine responds 40668340Sgad * this error by INSTANTLY retrying (and instantly re-failing...). 40768340Sgad * It would be stupid of the sending host to do that, but if there 40868340Sgad * was a broken implementation which did it, the result might be 40968340Sgad * obscure performance problems and a flood of syslog messages on 41068340Sgad * the receiving host. 41168340Sgad */ 41268340Sgad sleep(2); /* a paranoid throttling measure */ 4131553Srgrimes putchar('\1'); /* return error code */ 4141553Srgrimes exit(1); 4151553Srgrimes} 416