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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94"; 37 #endif 38 static const char rcsid[] = 39 "$Id$"; 40 #endif /* not lint */ 41 42 43 #include <sys/param.h> 44 #include <sys/socket.h> 45 #include <sys/un.h> 46 47 #include <dirent.h> 48 #include <err.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include "lp.h" 53 #include "pathnames.h" 54 55 extern uid_t uid, euid; 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 warn("socket"); 72 return(0); 73 } 74 memset(&un, 0, sizeof(un)); 75 un.sun_family = AF_UNIX; 76 strcpy(un.sun_path, _PATH_SOCKETNAME); 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 warn("connect"); 84 (void) close(s); 85 return(0); 86 } 87 seteuid(uid); 88 if (snprintf(buf, sizeof(buf), "\1%s\n", printer) > sizeof(buf) - 1) { 89 close(s); 90 return (0); 91 } 92 n = strlen(buf); 93 if (write(s, buf, n) != n) { 94 warn("write"); 95 (void) close(s); 96 return(0); 97 } 98 if (read(s, buf, 1) == 1) { 99 if (buf[0] == '\0') { /* everything is OK */ 100 (void) close(s); 101 return(1); 102 } 103 putchar(buf[0]); 104 } 105 while ((n = read(s, buf, sizeof(buf))) > 0) 106 fwrite(buf, 1, n, stdout); 107 (void) close(s); 108 return(0); 109 } 110