/* $OpenBSD: startdaemon.c,v 1.13 2009/10/27 23:59:51 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 #include #include #include #include #include #include #include #include #include #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_LOCAL, SOCK_STREAM, 0); if (s < 0) { warn("socket"); return(0); } memset(&un, 0, sizeof(un)); un.sun_family = AF_LOCAL; strlcpy(un.sun_path, _PATH_SOCKETNAME, sizeof(un.sun_path)); siginterrupt(SIGINT, 1); PRIV_START; if (connect(s, (struct sockaddr *)&un, SUN_LEN(&un)) < 0) { if (errno == EINTR && gotintr) { PRIV_END; siginterrupt(SIGINT, 0); close(s); return(0); } PRIV_END; siginterrupt(SIGINT, 0); warn("connect"); (void)close(s); return(0); } PRIV_END; siginterrupt(SIGINT, 0); if ((n = snprintf(buf, sizeof(buf), "\1%s\n", printer)) >= sizeof(buf) || n == -1) { 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); }