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 static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94"; 36 #endif /* not lint */ 37 38 39 #include <sys/param.h> 40 #include <sys/socket.h> 41 #include <sys/un.h> 42 43 #include <dirent.h> 44 #include <errno.h> 45 #include <stdio.h> 46 #include <unistd.h> 47 #include <string.h> 48 #include "lp.h" 49 #include "pathnames.h" 50 51 static void perr __P((char *)); 52 53 /* 54 * Tell the printer daemon that there are new files in the spool directory. 55 */ 56 57 int 58 startdaemon(printer) 59 char *printer; 60 { 61 struct sockaddr_un un; 62 register int s, n; 63 char buf[BUFSIZ]; 64 65 s = socket(AF_UNIX, SOCK_STREAM, 0); 66 if (s < 0) { 67 perr("socket"); 68 return(0); 69 } 70 memset(&un, 0, sizeof(un)); 71 un.sun_family = AF_UNIX; 72 strcpy(un.sun_path, _PATH_SOCKETNAME); 73 #ifndef SUN_LEN 74 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 75 #endif 76 if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) { 77 perr("connect"); 78 (void) close(s); 79 return(0); 80 } 81 (void) sprintf(buf, "\1%s\n", printer); 82 n = strlen(buf); 83 if (write(s, buf, n) != n) { 84 perr("write"); 85 (void) close(s); 86 return(0); 87 } 88 if (read(s, buf, 1) == 1) { 89 if (buf[0] == '\0') { /* everything is OK */ 90 (void) close(s); 91 return(1); 92 } 93 putchar(buf[0]); 94 } 95 while ((n = read(s, buf, sizeof(buf))) > 0) 96 fwrite(buf, 1, n, stdout); 97 (void) close(s); 98 return(0); 99 } 100 101 static void 102 perr(msg) 103 char *msg; 104 { 105 extern char *name; 106 107 (void)printf("%s: %s: %s\n", name, msg, strerror(errno)); 108 } 109