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 #include "lp.cdefs.h" /* A cross-platform version of <sys/cdefs.h> */ 33 #include <sys/param.h> 34 #include <sys/socket.h> 35 #include <sys/uio.h> 36 #include <sys/un.h> 37 38 #include <dirent.h> 39 #include <err.h> 40 #include <stdio.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include "lp.h" 44 #include "pathnames.h" 45 46 /* 47 * Tell the printer daemon that there are new files in the spool directory. 48 */ 49 50 int 51 startdaemon(const struct printer *pp) 52 { 53 struct sockaddr_un un; 54 register int s, n; 55 int connectres; 56 char c; 57 58 s = socket(PF_LOCAL, SOCK_STREAM, 0); 59 if (s < 0) { 60 warn("socket"); 61 return(0); 62 } 63 memset(&un, 0, sizeof(un)); 64 un.sun_family = AF_LOCAL; 65 strcpy(un.sun_path, _PATH_SOCKETNAME); 66 #ifndef SUN_LEN 67 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 68 #endif 69 PRIV_START 70 connectres = connect(s, (struct sockaddr *)&un, SUN_LEN(&un)); 71 PRIV_END 72 if (connectres < 0) { 73 warn("Unable to connect to %s", _PATH_SOCKETNAME); 74 warnx("Check to see if the master 'lpd' process is running."); 75 (void) close(s); 76 return(0); 77 } 78 79 /* 80 * Avoid overruns without putting artificial limitations on 81 * the length. 82 */ 83 if (writel(s, "\1", pp->printer, "\n", (char *)0) <= 0) { 84 warn("write"); 85 (void) close(s); 86 return(0); 87 } 88 if (read(s, &c, 1) == 1) { 89 if (c == '\0') { /* everything is OK */ 90 (void) close(s); 91 return(1); 92 } 93 putchar(c); 94 } 95 while ((n = read(s, &c, 1)) > 0) 96 putchar(c); 97 (void) close(s); 98 return(0); 99 } 100