1/* $NetBSD: startdaemon.c,v 1.14 2005/11/28 03:26:06 christos Exp $ */ 2 3/* 4 * Copyright (c) 1983, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33#ifndef lint 34#if 0 35static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94"; 36#else 37__RCSID("$NetBSD: startdaemon.c,v 1.14 2005/11/28 03:26:06 christos Exp $"); 38#endif 39#endif /* not lint */ 40 41 42#include <sys/param.h> 43#include <sys/socket.h> 44#include <sys/un.h> 45 46#include <dirent.h> 47#include <errno.h> 48#include <stdio.h> 49#include <unistd.h> 50#include <string.h> 51#include <err.h> 52#include "lp.h" 53#include "pathnames.h" 54 55extern uid_t uid, euid; 56 57/* 58 * Tell the printer daemon that there are new files in the spool directory. 59 */ 60 61int 62startdaemon(const char *pname) 63{ 64 struct sockaddr_un un; 65 int s; 66 int n; 67 char buf[BUFSIZ]; 68 69 s = socket(AF_LOCAL, SOCK_STREAM, 0); 70 if (s < 0) { 71 warn("socket"); 72 return(0); 73 } 74 memset(&un, 0, sizeof(un)); 75 un.sun_family = AF_LOCAL; 76 strncpy(un.sun_path, _PATH_SOCKETNAME, sizeof(un.sun_path) - 1); 77#ifndef SUN_LEN 78#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 79#endif 80 seteuid(euid); 81 if (connect(s, (const struct sockaddr *)&un, 82 (int)SUN_LEN(&un)) < 0) { 83 seteuid(uid); 84 warn("connect"); 85 (void)close(s); 86 return(0); 87 } 88 seteuid(uid); 89 n = snprintf(buf, sizeof(buf), "\1%s\n", pname); 90 if (write(s, buf, n) != n) { 91 warn("write"); 92 (void)close(s); 93 return(0); 94 } 95 if (read(s, buf, 1) == 1) { 96 if (buf[0] == '\0') { /* everything is OK */ 97 (void)close(s); 98 return(1); 99 } 100 putchar(buf[0]); 101 } 102 while ((n = read(s, buf, sizeof(buf))) > 0) 103 fwrite(buf, 1, n, stdout); 104 (void)close(s); 105 return(0); 106} 107