source: trunk/athena/bin/lpr/startdaemon.c @ 6362

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)startdaemon.c       5.1 (Berkeley) 6/6/85";
#endif not lint

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

#include <stdio.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "lp.local.h"

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

        syslog(LOG_DEBUG, "Attempting to restart printer %s", printer);
        s = socket(AF_UNIX, SOCK_STREAM, 0);
        if (s < 0) {
                perr("socket");
                return(0);
        }
        sockun.sun_family = AF_UNIX;
        strcpy(sockun.sun_path, SOCKETNAME);
        if (connect(s, &sockun, strlen(sockun.sun_path) + 2) < 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
perr(msg)
        char *msg;
{
        extern char *name;
        extern int sys_nerr;
        extern char *sys_errlist[];
        extern int errno;

        syslog(LOG_DEBUG, "%s: %s: %m", name, msg);
        printf("%s: %s: ", name, msg);
        fputs(errno < sys_nerr ? sys_errlist[errno] : "Unknown error" , stdout);
        putchar('\n');
}