107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/* $NetBSD: startdaemon.c,v 1.14 2005/11/28 03:26:06 christos Exp $ */
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/*
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* Copyright (c) 1983, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)startdaemon.c 8.2 (Berkeley) 4/17/94";
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#else
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__RCSID("$NetBSD: startdaemon.c,v 1.14 2005/11/28 03:26:06 christos Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <dirent.h>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <err.h>
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#include "lp.h"
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#include "pathnames.h"
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extern uid_t uid, euid;
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/*
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* Tell the printer daemon that there are new files in the spool directory.
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*/
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int
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startdaemon(const char *pname)
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{
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struct sockaddr_un un;
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int s;
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size_t n;
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char buf[BUFSIZ];
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s = socket(AF_LOCAL, SOCK_STREAM, 0);
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if (s < 0) {
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warn("socket");
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return(0);
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}
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memset(&un, 0, sizeof(un));
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un.sun_family = AF_LOCAL;
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strncpy(un.sun_path, _PATH_SOCKETNAME, sizeof(un.sun_path) - 1);
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#ifndef SUN_LEN
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#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
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#endif
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seteuid(euid);
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if (connect(s, (const struct sockaddr *)&un,
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(int)SUN_LEN(&un)) < 0) {
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seteuid(uid);
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warn("connect");
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(void)close(s);
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return(0);
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}
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seteuid(uid);
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n = snprintf(buf, sizeof(buf), "\1%s\n", pname);
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if (write(s, buf, n) != n) {
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warn("write");
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(void)close(s);
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return(0);
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}
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if (read(s, buf, 1) == 1) {
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if (buf[0] == '\0') { /* everything is OK */
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(void)close(s);
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return(1);
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}
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putchar(buf[0]);
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}
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while ((n = read(s, buf, sizeof(buf))) > 0)
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fwrite(buf, 1, n, stdout);
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(void)close(s);
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return(0);
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}
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