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startdaemon.c revision 1.3 
      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, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /*static char sccsid[] = "from: @(#)startdaemon.c	5.7 (Berkeley) 3/2/91";*/
     36 static char rcsid[] = "$Id: startdaemon.c,v 1.3 1993/11/10 04:36:04 cgd Exp $";
     37 #endif /* not lint */
     38 
     39 /*
     40  * Tell the printer daemon that there are new files in the spool directory.
     41  */
     42 
     43 #include <sys/types.h>
     44 #include <sys/socket.h>
     45 #include <sys/un.h>
     46 #include <stdio.h>
     47 #include "lp.local.h"
     48 #include "pathnames.h"
     49 
     50 startdaemon(printer)
     51 	char *printer;
     52 {
     53 	struct sockaddr_un sun;
     54 	register int s, n;
     55 	char buf[BUFSIZ];
     56 	static void perr();
     57 
     58 	s = socket(AF_UNIX, SOCK_STREAM, 0);
     59 	if (s < 0) {
     60 		perr("socket");
     61 		return(0);
     62 	}
     63 	bzero(&sun, sizeof(sun));
     64 	sun.sun_family = AF_UNIX;
     65 	strcpy(sun.sun_path, _PATH_SOCKETNAME);
     66 	if (connect(s, (struct sockaddr *)&sun, strlen(sun.sun_path) + 2) < 0) {
     67 		perr("connect");
     68 		(void) close(s);
     69 		return(0);
     70 	}
     71 	(void) sprintf(buf, "\1%s\n", printer);
     72 	n = strlen(buf);
     73 	if (write(s, buf, n) != n) {
     74 		perr("write");
     75 		(void) close(s);
     76 		return(0);
     77 	}
     78 	if (read(s, buf, 1) == 1) {
     79 		if (buf[0] == '\0') {		/* everything is OK */
     80 			(void) close(s);
     81 			return(1);
     82 		}
     83 		putchar(buf[0]);
     84 	}
     85 	while ((n = read(s, buf, sizeof(buf))) > 0)
     86 		fwrite(buf, 1, n, stdout);
     87 	(void) close(s);
     88 	return(0);
     89 }
     90 
     91 static void
     92 perr(msg)
     93 	char *msg;
     94 {
     95 	extern int errno;
     96 	extern char *name;
     97 	char *strerror();
     98 
     99 	(void)printf("%s: %s: %s\n", name, msg, strerror(errno));
    100 }
    101