BSD 4_4_Lite1 release

[unix-history] / usr / src / usr.sbin / lpr / common_source / startdaemon.c

/*
* Copyright (c) 1983, 1993, 1994
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)startdaemon.c       8.2 (Berkeley) 4/17/94";
#endif /* not lint */


#include <sys/param.h>
#include <sys/socket.h>
#include <sys/un.h>

#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "lp.h"
#include "pathnames.h"

static void perr __P((char *));

/*
* Tell the printer daemon that there are new files in the spool directory.
*/

int
startdaemon(printer)
       char *printer;
{
       struct sockaddr_un un;
       register int s, n;
       char buf[BUFSIZ];

       s = socket(AF_UNIX, SOCK_STREAM, 0);
       if (s < 0) {
               perr("socket");
               return(0);
       }
       memset(&un, 0, sizeof(un));
       un.sun_family = AF_UNIX;
       strcpy(un.sun_path, _PATH_SOCKETNAME);
#ifndef SUN_LEN
#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
#endif
       if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) {
               perr("connect");
               (void) close(s);
               return(0);
       }
       (void) sprintf(buf, "\1%s\n", printer);
       n = strlen(buf);
       if (write(s, buf, n) != n) {
               perr("write");
               (void) close(s);
               return(0);
       }
       if (read(s, buf, 1) == 1) {
               if (buf[0] == '\0') {           /* everything is OK */
                       (void) close(s);
                       return(1);
               }
               putchar(buf[0]);
       }
       while ((n = read(s, buf, sizeof(buf))) > 0)
               fwrite(buf, 1, n, stdout);
       (void) close(s);
       return(0);
}

static void
perr(msg)
       char *msg;
{
       extern char *name;

       (void)printf("%s: %s: %s\n", name, msg, strerror(errno));
}