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