1 /* $NetBSD: startdaemon.c,v 1.8 1996/12/09 09:57:43 mrg 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94"; 38 #endif /* not lint */ 39 40 41 #include <sys/param.h> 42 #include <sys/socket.h> 43 #include <sys/un.h> 44 45 #include <dirent.h> 46 #include <errno.h> 47 #include <stdio.h> 48 #include <unistd.h> 49 #include <string.h> 50 #include "lp.h" 51 #include "pathnames.h" 52 53 extern uid_t uid, euid; 54 55 static void perr __P((char *)); 56 57 /* 58 * Tell the printer daemon that there are new files in the spool directory. 59 */ 60 61 int 62 startdaemon(printer) 63 char *printer; 64 { 65 struct sockaddr_un un; 66 register int s, n; 67 char buf[BUFSIZ]; 68 69 s = socket(AF_UNIX, SOCK_STREAM, 0); 70 if (s < 0) { 71 perr("socket"); 72 return(0); 73 } 74 memset(&un, 0, sizeof(un)); 75 un.sun_family = AF_UNIX; 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, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) { 82 seteuid(uid); 83 perr("connect"); 84 (void)close(s); 85 return(0); 86 } 87 seteuid(uid); 88 n = snprintf(buf, sizeof(buf), "\1%s\n", printer); 89 if (write(s, buf, n) != n) { 90 perr("write"); 91 (void)close(s); 92 return(0); 93 } 94 if (read(s, buf, 1) == 1) { 95 if (buf[0] == '\0') { /* everything is OK */ 96 (void)close(s); 97 return(1); 98 } 99 putchar(buf[0]); 100 } 101 while ((n = read(s, buf, sizeof(buf))) > 0) 102 fwrite(buf, 1, n, stdout); 103 (void)close(s); 104 return(0); 105 } 106 107 static void 108 perr(msg) 109 char *msg; 110 { 111 extern char *name; 112 113 (void)printf("%s: %s: %s\n", name, msg, strerror(errno)); 114 } 115