405 lines
11 KiB
C
405 lines
11 KiB
C
/* $NetBSD: common.c,v 1.24 2002/09/18 23:27:25 mycroft Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)common.c 8.5 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: common.c,v 1.24 2002/09/18 23:27:25 mycroft Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <dirent.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ifaddrs.h>
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#include "lp.h"
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#include "pathnames.h"
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/*
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* Routines and data common to all the line printer functions.
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*/
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char *AF; /* accounting file */
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long BR; /* baud rate if lp is a tty */
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char *CF; /* name of cifplot filter (per job) */
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char *DF; /* name of tex filter (per job) */
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long DU; /* daeomon user-id */
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long FC; /* flags to clear if lp is a tty */
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char *FF; /* form feed string */
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long FS; /* flags to set if lp is a tty */
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char *GF; /* name of graph(1G) filter (per job) */
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long HL; /* print header last */
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char *IF; /* name of input filter (created per job) */
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char *LF; /* log file for error messages */
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char *LO; /* lock file name */
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char *LP; /* line printer device name */
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long MC; /* maximum number of copies allowed */
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char *MS; /* stty flags to set if lp is a tty */
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long MX; /* maximum number of blocks to copy */
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char *NF; /* name of ditroff filter (per job) */
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char *OF; /* name of output filter (created once) */
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char *PF; /* name of vrast filter (per job) */
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long PL; /* page length */
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long PW; /* page width */
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long PX; /* page width in pixels */
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long PY; /* page length in pixels */
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char *RF; /* name of fortran text filter (per job) */
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char *RG; /* resricted group */
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char *RM; /* remote machine name */
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char *RP; /* remote printer name */
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long RS; /* restricted to those with local accounts */
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long RW; /* open LP for reading and writing */
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long SB; /* short banner instead of normal header */
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long SC; /* suppress multiple copies */
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char *SD; /* spool directory */
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long SF; /* suppress FF on each print job */
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long SH; /* suppress header page */
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char *ST; /* status file name */
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char *TF; /* name of troff filter (per job) */
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char *TR; /* trailer string to be output when Q empties */
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char *VF; /* name of vplot filter (per job) */
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long XC; /* flags to clear for local mode */
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long XS; /* flags to set for local mode */
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char line[BUFSIZ];
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int remote; /* true if sending files to a remote host */
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extern uid_t uid, euid;
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static int compar(const void *, const void *);
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/*
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* Create a TCP connection to host "rhost" at port "rport".
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* If rport == 0, then use the printer service port.
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* Most of this code comes from rcmd.c.
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*/
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int
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getport(char *rhost, int rport)
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{
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struct addrinfo hints, *res, *r;
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u_int timo = 1;
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int s, lport = IPPORT_RESERVED - 1;
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int error;
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int refuse, trial;
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char pbuf[NI_MAXSERV];
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/*
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* Get the host address and port number to connect to.
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*/
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if (rhost == NULL)
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fatal("no remote host to connect to");
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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if (rport)
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snprintf(pbuf, sizeof(pbuf), "%d", rport);
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else
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snprintf(pbuf, sizeof(pbuf), "printer");
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error = getaddrinfo(rhost, pbuf, &hints, &res);
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if (error)
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fatal("printer/tcp: %s", gai_strerror(error));
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/*
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* Try connecting to the server.
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*/
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retry:
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s = -1;
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refuse = trial = 0;
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for (r = res; r; r = r->ai_next) {
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trial++;
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retryport:
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seteuid(euid);
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s = rresvport_af(&lport, r->ai_family);
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seteuid(uid);
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if (s < 0)
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return(-1);
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if (connect(s, r->ai_addr, r->ai_addrlen) < 0) {
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error = errno;
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(void)close(s);
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s = -1;
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errno = error;
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if (errno == EADDRINUSE) {
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lport--;
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goto retryport;
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} else if (errno == ECONNREFUSED)
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refuse++;
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continue;
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} else
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break;
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}
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if (s < 0 && trial == refuse && timo <= 16) {
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sleep(timo);
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timo *= 2;
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goto retry;
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}
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if (res)
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freeaddrinfo(res);
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return(s);
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}
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/*
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* Getline reads a line from the control file cfp, removes tabs, converts
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* new-line to null and leaves it in line.
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* Returns 0 at EOF or the number of characters read.
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*/
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int
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getline(FILE *cfp)
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{
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int linel = 0, c;
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char *lp = line;
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while ((c = getc(cfp)) != '\n' && linel+1<sizeof(line)) {
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if (c == EOF)
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return(0);
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if (c == '\t') {
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do {
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*lp++ = ' ';
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linel++;
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} while ((linel & 07) != 0 && linel+1 < sizeof(line));
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continue;
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}
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*lp++ = c;
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linel++;
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}
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*lp++ = '\0';
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return(linel);
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}
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/*
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* Scan the current directory and make a list of daemon files sorted by
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* creation time.
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* Return the number of entries and a pointer to the list.
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*/
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int
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getq(struct queue **namelist[])
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{
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struct dirent *d;
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struct queue *q, **queue;
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struct stat stbuf;
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DIR *dirp;
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u_int nitems, arraysz;
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seteuid(euid);
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dirp = opendir(SD);
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seteuid(uid);
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if (dirp == NULL)
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return(-1);
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if (fstat(dirp->dd_fd, &stbuf) < 0)
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goto errdone;
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/*
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* Estimate the array size by taking the size of the directory file
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* and dividing it by a multiple of the minimum size entry.
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*/
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arraysz = (int)(stbuf.st_size / 24);
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queue = (struct queue **)malloc(arraysz * sizeof(struct queue *));
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if (queue == NULL)
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goto errdone;
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nitems = 0;
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while ((d = readdir(dirp)) != NULL) {
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if (d->d_name[0] != 'c' || d->d_name[1] != 'f')
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continue; /* daemon control files only */
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seteuid(euid);
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if (stat(d->d_name, &stbuf) < 0) {
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seteuid(uid);
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continue; /* Doesn't exist */
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}
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seteuid(uid);
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q = (struct queue *)malloc(sizeof(time_t)+strlen(d->d_name)+1);
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if (q == NULL)
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goto errdone;
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q->q_time = stbuf.st_mtime;
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strcpy(q->q_name, d->d_name); /* XXX: strcpy is safe */
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/*
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* Check to make sure the array has space left and
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* realloc the maximum size.
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*/
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if (++nitems > arraysz) {
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arraysz *= 2;
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queue = (struct queue **)realloc(queue,
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arraysz * sizeof(struct queue *));
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if (queue == NULL)
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goto errdone;
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}
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queue[nitems-1] = q;
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}
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closedir(dirp);
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if (nitems)
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qsort(queue, nitems, sizeof(struct queue *), compar);
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*namelist = queue;
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return(nitems);
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errdone:
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closedir(dirp);
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return(-1);
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}
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/*
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* Compare modification times.
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*/
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static int
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compar(const void *p1, const void *p2)
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{
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if ((*(struct queue **)p1)->q_time < (*(struct queue **)p2)->q_time)
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return(-1);
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if ((*(struct queue **)p1)->q_time > (*(struct queue **)p2)->q_time)
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return(1);
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return(0);
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}
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/*
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* Figure out whether the local machine is the same
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* as the remote machine (RM) entry (if it exists).
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*/
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char *
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checkremote(void)
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{
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char lname[NI_MAXHOST], rname[NI_MAXHOST];
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struct addrinfo hints, *res, *res0;
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static char errbuf[128];
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int error;
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struct ifaddrs *ifap, *ifa;
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#ifdef NI_WITHSCOPEID
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const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
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#else
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const int niflags = NI_NUMERICHOST;
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#endif
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#ifdef __KAME__
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struct sockaddr_in6 sin6;
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struct sockaddr_in6 *sin6p;
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#endif
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remote = 0; /* assume printer is local on failure */
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if (RM == NULL)
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return NULL;
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/* get the local interface addresses */
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if (getifaddrs(&ifap) < 0) {
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(void)snprintf(errbuf, sizeof(errbuf),
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"unable to get local interface address: %s",
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strerror(errno));
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return errbuf;
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}
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/* get the remote host addresses (RM) */
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memset(&hints, 0, sizeof(hints));
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hints.ai_flags = AI_CANONNAME;
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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res = NULL;
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error = getaddrinfo(RM, NULL, &hints, &res0);
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if (error) {
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(void)snprintf(errbuf, sizeof(errbuf),
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"unable to resolve remote machine %s: %s",
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RM, gai_strerror(error));
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freeifaddrs(ifap);
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return errbuf;
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}
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remote = 1; /* assume printer is remote */
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for (res = res0; res; res = res->ai_next) {
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if (getnameinfo(res->ai_addr, res->ai_addrlen,
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rname, sizeof(rname), NULL, 0, niflags) != 0)
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continue;
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for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
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#ifdef __KAME__
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sin6p = (struct sockaddr_in6 *)ifa->ifa_addr;
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if (ifa->ifa_addr->sa_family == AF_INET6 &&
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ifa->ifa_addr->sa_len == sizeof(sin6) &&
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IN6_IS_ADDR_LINKLOCAL(&sin6p->sin6_addr) &&
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*(u_int16_t *)&sin6p->sin6_addr.s6_addr[2]) {
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/* kame scopeid hack */
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memcpy(&sin6, ifa->ifa_addr, sizeof(sin6));
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sin6.sin6_scope_id =
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ntohs(*(u_int16_t *)&sin6p->sin6_addr.s6_addr[2]);
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sin6.sin6_addr.s6_addr[2] = 0;
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sin6.sin6_addr.s6_addr[3] = 0;
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if (getnameinfo((struct sockaddr *)&sin6,
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sin6.sin6_len, lname, sizeof(lname),
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NULL, 0, niflags) != 0)
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continue;
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} else
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#endif
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if (getnameinfo(ifa->ifa_addr, ifa->ifa_addr->sa_len,
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lname, sizeof(lname), NULL, 0, niflags) != 0)
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continue;
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if (strcmp(rname, lname) == 0) {
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remote = 0;
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goto done;
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}
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}
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}
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done:
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freeaddrinfo(res0);
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freeifaddrs(ifap);
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return NULL;
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}
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/* sleep n milliseconds */
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void
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delay(int n)
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{
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struct timespec tdelay;
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if (n <= 0 || n > 10000)
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fatal("unreasonable delay period (%d)", n);
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tdelay.tv_sec = n / 1000;
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tdelay.tv_nsec = (n % 1000) * 1000000;
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nanosleep(&tdelay, NULL);
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}
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