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Annotation of 43BSDTahoe/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.
                      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) 6/30/88";
                     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: }

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