1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)startdaemon.c 5.10 (Berkeley) 02/25/93"; 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 un.sun_family = AF_UNIX; 45 strcpy(un.sun_path, _PATH_SOCKETNAME); 46 #ifndef SUN_LEN 47 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 48 #endif 49 if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) { 50 perr("connect"); 51 (void) close(s); 52 return(0); 53 } 54 (void) sprintf(buf, "\1%s\n", printer); 55 n = strlen(buf); 56 if (write(s, buf, n) != n) { 57 perr("write"); 58 (void) close(s); 59 return(0); 60 } 61 if (read(s, buf, 1) == 1) { 62 if (buf[0] == '\0') { /* everything is OK */ 63 (void) close(s); 64 return(1); 65 } 66 putchar(buf[0]); 67 } 68 while ((n = read(s, buf, sizeof(buf))) > 0) 69 fwrite(buf, 1, n, stdout); 70 (void) close(s); 71 return(0); 72 } 73 74 static void 75 perr(msg) 76 char *msg; 77 { 78 extern char *name; 79 80 (void)printf("%s: %s: %s\n", name, msg, strerror(errno)); 81 } 82