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/* $OpenBSD: startdaemon.c,v 1.18 2019/07/03 03:24:03 deraadt Exp $ */
/* $NetBSD: startdaemon.c,v 1.10 1998/07/18 05:04:39 lukem Exp $ */
/*
* 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. 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.
*/
#include <sys/socket.h>
#include <sys/un.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>
#include <string.h>
#include <signal.h>
#include "lp.h"
#include "pathnames.h"
/*
* Tell the printer daemon that there are new files in the spool directory.
*/
int
startdaemon(char *printer)
{
struct sockaddr_un un;
int s;
size_t n;
char buf[BUFSIZ];
s = socket(AF_UNIX, SOCK_STREAM, 0);
if (s < 0) {
warn("socket");
return(0);
}
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
strlcpy(un.sun_path, _PATH_SOCKETNAME, sizeof(un.sun_path));
siginterrupt(SIGINT, 1);
PRIV_START;
if (connect(s, (struct sockaddr *)&un, sizeof(un)) < 0) {
int saved_errno = errno;
if (errno == EINTR && gotintr) {
PRIV_END;
siginterrupt(SIGINT, 0);
close(s);
return(0);
}
PRIV_END;
siginterrupt(SIGINT, 0);
warnc(saved_errno, "connect");
(void)close(s);
return(0);
}
PRIV_END;
siginterrupt(SIGINT, 0);
if ((n = snprintf(buf, sizeof(buf), "\1%s\n", printer)) < 0 ||
n >= sizeof(buf)) {
close(s);
return (0);
}
/* XXX atomicio inside siginterrupt? */
if (write(s, buf, n) != n) {
warn("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);
}
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