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Annotation of 43BSD/usr.lib/lpr/startdaemon.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #ifndef lint
                      8: static char sccsid[] = "@(#)startdaemon.c      5.1 (Berkeley) 6/6/85";
                      9: #endif not lint
                     10: 
                     11: /*
                     12:  * Tell the printer daemon that there are new files in the spool directory.
                     13:  */
                     14: 
                     15: #include <stdio.h>
                     16: #include <sys/types.h>
                     17: #include <sys/socket.h>
                     18: #include <sys/un.h>
                     19: #include "lp.local.h"
                     20: 
                     21: startdaemon(printer)
                     22:        char *printer;
                     23: {
                     24:        struct sockaddr_un sun;
                     25:        register int s, n;
                     26:        char buf[BUFSIZ];
                     27: 
                     28:        s = socket(AF_UNIX, SOCK_STREAM, 0);
                     29:        if (s < 0) {
                     30:                perr("socket");
                     31:                return(0);
                     32:        }
                     33:        sun.sun_family = AF_UNIX;
                     34:        strcpy(sun.sun_path, SOCKETNAME);
                     35:        if (connect(s, &sun, strlen(sun.sun_path) + 2) < 0) {
                     36:                perr("connect");
                     37:                (void) close(s);
                     38:                return(0);
                     39:        }
                     40:        (void) sprintf(buf, "\1%s\n", printer);
                     41:        n = strlen(buf);
                     42:        if (write(s, buf, n) != n) {
                     43:                perr("write");
                     44:                (void) close(s);
                     45:                return(0);
                     46:        }
                     47:        if (read(s, buf, 1) == 1) {
                     48:                if (buf[0] == '\0') {           /* everything is OK */
                     49:                        (void) close(s);
                     50:                        return(1);
                     51:                }
                     52:                putchar(buf[0]);
                     53:        }
                     54:        while ((n = read(s, buf, sizeof(buf))) > 0)
                     55:                fwrite(buf, 1, n, stdout);
                     56:        (void) close(s);
                     57:        return(0);
                     58: }
                     59: 
                     60: static
                     61: perr(msg)
                     62:        char *msg;
                     63: {
                     64:        extern char *name;
                     65:        extern int sys_nerr;
                     66:        extern char *sys_errlist[];
                     67:        extern int errno;
                     68: 
                     69:        printf("%s: %s: ", name, msg);
                     70:        fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout);
                     71:        putchar('\n');
                     72: }

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