1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #if 0 33 #ifndef lint 34 static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94"; 35 #endif /* not lint */ 36 #endif 37 38 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */ 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/param.h> 42 #include <sys/socket.h> 43 #include <sys/uio.h> 44 #include <sys/un.h> 45 46 #include <dirent.h> 47 #include <err.h> 48 #include <stdio.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include "lp.h" 52 #include "pathnames.h" 53 54 /* 55 * Tell the printer daemon that there are new files in the spool directory. 56 */ 57 58 int 59 startdaemon(const struct printer *pp) 60 { 61 struct sockaddr_un un; 62 register int s, n; 63 int connectres; 64 char c; 65 66 s = socket(PF_LOCAL, SOCK_STREAM, 0); 67 if (s < 0) { 68 warn("socket"); 69 return(0); 70 } 71 memset(&un, 0, sizeof(un)); 72 un.sun_family = AF_LOCAL; 73 strcpy(un.sun_path, _PATH_SOCKETNAME); 74 #ifndef SUN_LEN 75 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 76 #endif 77 PRIV_START 78 connectres = connect(s, (struct sockaddr *)&un, SUN_LEN(&un)); 79 PRIV_END 80 if (connectres < 0) { 81 warn("Unable to connect to %s", _PATH_SOCKETNAME); 82 warnx("Check to see if the master 'lpd' process is running."); 83 (void) close(s); 84 return(0); 85 } 86 87 /* 88 * Avoid overruns without putting artificial limitations on 89 * the length. 90 */ 91 if (writel(s, "\1", pp->printer, "\n", (char *)0) <= 0) { 92 warn("write"); 93 (void) close(s); 94 return(0); 95 } 96 if (read(s, &c, 1) == 1) { 97 if (c == '\0') { /* everything is OK */ 98 (void) close(s); 99 return(1); 100 } 101 putchar(c); 102 } 103 while ((n = read(s, &c, 1)) > 0) 104 putchar(c); 105 (void) close(s); 106 return(0); 107 } 108