1 /* startdaemon.c 4.6 83/06/29 */ 2 /* 3 * Tell the printer daemon that there are new files in the spool directory. 4 */ 5 6 #include <stdio.h> 7 #include <sys/types.h> 8 #include <sys/socket.h> 9 #include <sys/un.h> 10 #include "lp.local.h" 11 12 startdaemon(printer) 13 char *printer; 14 { 15 struct sockaddr_un sun; 16 register int s, n; 17 char buf[BUFSIZ]; 18 19 s = socket(AF_UNIX, SOCK_STREAM, 0); 20 if (s < 0) { 21 perr("socket"); 22 return(0); 23 } 24 sun.sun_family = AF_UNIX; 25 strcpy(sun.sun_path, SOCKETNAME); 26 if (connect(s, &sun, strlen(sun.sun_path) + 2) < 0) { 27 perr("connect"); 28 (void) close(s); 29 return(0); 30 } 31 (void) sprintf(buf, "\1%s\n", printer); 32 n = strlen(buf); 33 if (write(s, buf, n) != n) { 34 perr("write"); 35 (void) close(s); 36 return(0); 37 } 38 if (read(s, buf, 1) == 1) { 39 if (buf[0] == '\0') { /* everything is OK */ 40 (void) close(s); 41 return(1); 42 } 43 putchar(buf[0]); 44 } 45 while ((n = read(s, buf, sizeof(buf))) > 0) 46 fwrite(buf, 1, n, stdout); 47 (void) close(s); 48 return(0); 49 } 50 51 static 52 perr(msg) 53 char *msg; 54 { 55 extern char *name; 56 extern int sys_nerr; 57 extern char *sys_errlist[]; 58 extern int errno; 59 60 printf("%s: %s: ", name, msg); 61 fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout); 62 putchar('\n'); 63 } 64