1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)startdaemon.c 5.3 (Berkeley) 06/30/88"; 20 #endif /* not lint */ 21 22 /* 23 * Tell the printer daemon that there are new files in the spool directory. 24 */ 25 26 #include <stdio.h> 27 #include <sys/types.h> 28 #include <sys/socket.h> 29 #include <sys/un.h> 30 #include "lp.local.h" 31 32 startdaemon(printer) 33 char *printer; 34 { 35 struct sockaddr_un sun; 36 register int s, n; 37 char buf[BUFSIZ]; 38 39 s = socket(AF_UNIX, SOCK_STREAM, 0); 40 if (s < 0) { 41 perr("socket"); 42 return(0); 43 } 44 sun.sun_family = AF_UNIX; 45 strcpy(sun.sun_path, SOCKETNAME); 46 if (connect(s, &sun, strlen(sun.sun_path) + 2) < 0) { 47 perr("connect"); 48 (void) close(s); 49 return(0); 50 } 51 (void) sprintf(buf, "\1%s\n", printer); 52 n = strlen(buf); 53 if (write(s, buf, n) != n) { 54 perr("write"); 55 (void) close(s); 56 return(0); 57 } 58 if (read(s, buf, 1) == 1) { 59 if (buf[0] == '\0') { /* everything is OK */ 60 (void) close(s); 61 return(1); 62 } 63 putchar(buf[0]); 64 } 65 while ((n = read(s, buf, sizeof(buf))) > 0) 66 fwrite(buf, 1, n, stdout); 67 (void) close(s); 68 return(0); 69 } 70 71 static 72 perr(msg) 73 char *msg; 74 { 75 extern char *name; 76 extern int sys_nerr; 77 extern char *sys_errlist[]; 78 extern int errno; 79 80 printf("%s: %s: ", name, msg); 81 fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout); 82 putchar('\n'); 83 } 84