1 /* 2 * Copyright (c) 1983, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 04/17/94"; 10 #endif /* not lint */ 11 12 13 #include <sys/param.h> 14 #include <sys/socket.h> 15 #include <sys/un.h> 16 17 #include <dirent.h> 18 #include <errno.h> 19 #include <stdio.h> 20 #include <unistd.h> 21 #include <string.h> 22 #include "lp.h" 23 #include "pathnames.h" 24 25 static void perr __P((char *)); 26 27 /* 28 * Tell the printer daemon that there are new files in the spool directory. 29 */ 30 31 int 32 startdaemon(printer) 33 char *printer; 34 { 35 struct sockaddr_un un; 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 memset(&un, 0, sizeof(un)); 45 un.sun_family = AF_UNIX; 46 strcpy(un.sun_path, _PATH_SOCKETNAME); 47 #ifndef SUN_LEN 48 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 49 #endif 50 if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) { 51 perr("connect"); 52 (void) close(s); 53 return(0); 54 } 55 (void) sprintf(buf, "\1%s\n", printer); 56 n = strlen(buf); 57 if (write(s, buf, n) != n) { 58 perr("write"); 59 (void) close(s); 60 return(0); 61 } 62 if (read(s, buf, 1) == 1) { 63 if (buf[0] == '\0') { /* everything is OK */ 64 (void) close(s); 65 return(1); 66 } 67 putchar(buf[0]); 68 } 69 while ((n = read(s, buf, sizeof(buf))) > 0) 70 fwrite(buf, 1, n, stdout); 71 (void) close(s); 72 return(0); 73 } 74 75 static void 76 perr(msg) 77 char *msg; 78 { 79 extern char *name; 80 81 (void)printf("%s: %s: %s\n", name, msg, strerror(errno)); 82 } 83