111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#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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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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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/uio.h>
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#include <sys/un.h>
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#include <dirent.h>
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#include <err.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.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(pp)
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const struct printer *pp;
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{
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struct sockaddr_un un;
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register int s, n;
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char c;
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s = socket(PF_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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strcpy(un.sun_path, _PATH_SOCKETNAME);
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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, (struct sockaddr *)&un, 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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/*
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* Avoid overruns without putting artificial limitations on
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* the length.
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*/
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if (writel(s, "\1", pp->printer, "\n", (char *)0) <= 0) {
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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, &c, 1) == 1) {
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if (c == '\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(c);
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}
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while ((n = read(s, &c, 1)) > 0)
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putchar(c);
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(void) close(s);
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return(0);
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}
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