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Annotation of 43BSDReno/usr.sbin/lpr/common_source/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 provided
                      6:  * that: (1) source distributions retain this entire copyright notice and
                      7:  * comment, and (2) distributions including binaries display the following
                      8:  * acknowledgement:  ``This product includes software developed by the
                      9:  * University of California, Berkeley and its contributors'' in the
                     10:  * documentation or other materials provided with the distribution and in
                     11:  * all advertising materials mentioning features or use of this software.
                     12:  * Neither the name of the University nor the names of its contributors may
                     13:  * be used to endorse or promote products derived from this software without
                     14:  * specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     16:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     17:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)startdaemon.c      5.6 (Berkeley) 6/1/90";
                     22: #endif /* not lint */
                     23: 
                     24: /*
                     25:  * Tell the printer daemon that there are new files in the spool directory.
                     26:  */
                     27: 
                     28: #include <sys/types.h>
                     29: #include <sys/socket.h>
                     30: #include <sys/un.h>
                     31: #include <stdio.h>
                     32: #include "lp.local.h"
                     33: #include "pathnames.h"
                     34: 
                     35: startdaemon(printer)
                     36:        char *printer;
                     37: {
                     38:        struct sockaddr_un sun;
                     39:        register int s, n;
                     40:        char buf[BUFSIZ];
                     41: 
                     42:        s = socket(AF_UNIX, SOCK_STREAM, 0);
                     43:        if (s < 0) {
                     44:                perr("socket");
                     45:                return(0);
                     46:        }
                     47:        sun.sun_family = AF_UNIX;
                     48:        strcpy(sun.sun_path, _PATH_SOCKETNAME);
                     49:        if (connect(s, &sun, strlen(sun.sun_path) + 2) < 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
                     75: perr(msg)
                     76:        char *msg;
                     77: {
                     78:        extern int errno;
                     79:        extern char *name;
                     80:        char *strerror();
                     81: 
                     82:        (void)printf("%s: %s: %s\n", name, msg, strerror(errno));
                     83: }

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