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-rw-r--r--usr.sbin/lpr/common_source/recvjob.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/usr.sbin/lpr/common_source/recvjob.c b/usr.sbin/lpr/common_source/recvjob.c
new file mode 100644
index 0000000..67a6183
--- /dev/null
+++ b/usr.sbin/lpr/common_source/recvjob.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright (c) 1983, 1993
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1983, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)recvjob.c 8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+/*
+ * Receive printer jobs from the network, queue them and
+ * start the printer daemon.
+ */
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+
+#include <unistd.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "lp.h"
+#include "lp.local.h"
+#include "extern.h"
+#include "pathnames.h"
+
+#define ack() (void) write(1, sp, 1);
+
+static char dfname[40]; /* data files */
+static int minfree; /* keep at least minfree blocks available */
+static char *sp = "";
+static char tfname[40]; /* tmp copy of cf before linking */
+
+static int chksize __P((int));
+static void frecverr __P((const char *, ...));
+static int noresponse __P((void));
+static void rcleanup __P((int));
+static int read_number __P((char *));
+static int readfile __P((char *, int));
+static int readjob __P((void));
+
+
+void
+recvjob()
+{
+ struct stat stb;
+ int status;
+
+ /*
+ * Perform lookup for printer name or abbreviation
+ */
+ if ((status = cgetent(&bp, printcapdb, printer)) == -2)
+ frecverr("cannot open printer description file");
+ else if (status == -1)
+ frecverr("unknown printer %s", printer);
+ else if (status == -3)
+ fatal("potential reference loop detected in printcap file");
+
+ if (cgetstr(bp, "lf", &LF) == -1)
+ LF = _PATH_CONSOLE;
+ if (cgetstr(bp, "sd", &SD) == -1)
+ SD = _PATH_DEFSPOOL;
+ if (cgetstr(bp, "lo", &LO) == -1)
+ LO = DEFLOCK;
+
+ (void) close(2); /* set up log file */
+ if (open(LF, O_WRONLY|O_APPEND, 0664) < 0) {
+ syslog(LOG_ERR, "%s: %m", LF);
+ (void) open(_PATH_DEVNULL, O_WRONLY);
+ }
+
+ if (chdir(SD) < 0)
+ frecverr("%s: %s: %m", printer, SD);
+ if (stat(LO, &stb) == 0) {
+ if (stb.st_mode & 010) {
+ /* queue is disabled */
+ putchar('\1'); /* return error code */
+ exit(1);
+ }
+ } else if (stat(SD, &stb) < 0)
+ frecverr("%s: %s: %m", printer, SD);
+ minfree = 2 * read_number("minfree"); /* scale KB to 512 blocks */
+ signal(SIGTERM, rcleanup);
+ signal(SIGPIPE, rcleanup);
+
+ if (readjob())
+ printjob();
+}
+
+/*
+ * Read printer jobs sent by lpd and copy them to the spooling directory.
+ * Return the number of jobs successfully transfered.
+ */
+static int
+readjob()
+{
+ register int size, nfiles;
+ register char *cp;
+
+ ack();
+ nfiles = 0;
+ for (;;) {
+ /*
+ * Read a command to tell us what to do
+ */
+ cp = line;
+ do {
+ if ((size = read(1, cp, 1)) != 1) {
+ if (size < 0)
+ frecverr("%s: Lost connection",printer);
+ return(nfiles);
+ }
+ } while (*cp++ != '\n');
+ *--cp = '\0';
+ cp = line;
+ switch (*cp++) {
+ case '\1': /* cleanup because data sent was bad */
+ rcleanup(0);
+ continue;
+
+ case '\2': /* read cf file */
+ size = 0;
+ while (*cp >= '0' && *cp <= '9')
+ size = size * 10 + (*cp++ - '0');
+ if (*cp++ != ' ')
+ break;
+ /*
+ * host name has been authenticated, we use our
+ * view of the host name since we may be passed
+ * something different than what gethostbyaddr()
+ * returns
+ */
+ strcpy(cp + 6, from);
+ strcpy(tfname, cp);
+ tfname[0] = 't';
+ if (!chksize(size)) {
+ (void) write(1, "\2", 1);
+ continue;
+ }
+ if (!readfile(tfname, size)) {
+ rcleanup(0);
+ continue;
+ }
+ if (link(tfname, cp) < 0)
+ frecverr("%s: %m", tfname);
+ (void) unlink(tfname);
+ tfname[0] = '\0';
+ nfiles++;
+ continue;
+
+ case '\3': /* read df file */
+ size = 0;
+ while (*cp >= '0' && *cp <= '9')
+ size = size * 10 + (*cp++ - '0');
+ if (*cp++ != ' ')
+ break;
+ if (!chksize(size)) {
+ (void) write(1, "\2", 1);
+ continue;
+ }
+ (void) strcpy(dfname, cp);
+ if (index(dfname, '/'))
+ frecverr("readjob: %s: illegal path name",
+ dfname);
+ (void) readfile(dfname, size);
+ continue;
+ }
+ frecverr("protocol screwup: %s", line);
+ }
+}
+
+/*
+ * Read files send by lpd and copy them to the spooling directory.
+ */
+static int
+readfile(file, size)
+ char *file;
+ int size;
+{
+ register char *cp;
+ char buf[BUFSIZ];
+ register int i, j, amt;
+ int fd, err;
+
+ fd = open(file, O_CREAT|O_EXCL|O_WRONLY, FILMOD);
+ if (fd < 0)
+ frecverr("readfile: %s: illegal path name: %m", file);
+ ack();
+ err = 0;
+ for (i = 0; i < size; i += BUFSIZ) {
+ amt = BUFSIZ;
+ cp = buf;
+ if (i + amt > size)
+ amt = size - i;
+ do {
+ j = read(1, cp, amt);
+ if (j <= 0)
+ frecverr("Lost connection");
+ amt -= j;
+ cp += j;
+ } while (amt > 0);
+ amt = BUFSIZ;
+ if (i + amt > size)
+ amt = size - i;
+ if (write(fd, buf, amt) != amt) {
+ err++;
+ break;
+ }
+ }
+ (void) close(fd);
+ if (err)
+ frecverr("%s: write error", file);
+ if (noresponse()) { /* file sent had bad data in it */
+ (void) unlink(file);
+ return(0);
+ }
+ ack();
+ return(1);
+}
+
+static int
+noresponse()
+{
+ char resp;
+
+ if (read(1, &resp, 1) != 1)
+ frecverr("Lost connection");
+ if (resp == '\0')
+ return(0);
+ return(1);
+}
+
+/*
+ * Check to see if there is enough space on the disk for size bytes.
+ * 1 == OK, 0 == Not OK.
+ */
+static int
+chksize(size)
+ int size;
+{
+ int spacefree;
+ struct statfs sfb;
+
+ if (statfs(".", &sfb) < 0) {
+ syslog(LOG_ERR, "%s: %m", "statfs(\".\")");
+ return (1);
+ }
+ spacefree = sfb.f_bavail * (sfb.f_bsize / 512);
+ size = (size + 511) / 512;
+ if (minfree + size > spacefree)
+ return(0);
+ return(1);
+}
+
+static int
+read_number(fn)
+ char *fn;
+{
+ char lin[80];
+ register FILE *fp;
+
+ if ((fp = fopen(fn, "r")) == NULL)
+ return (0);
+ if (fgets(lin, 80, fp) == NULL) {
+ fclose(fp);
+ return (0);
+ }
+ fclose(fp);
+ return (atoi(lin));
+}
+
+/*
+ * Remove all the files associated with the current job being transfered.
+ */
+static void
+rcleanup(signo)
+ int signo;
+{
+ if (tfname[0])
+ (void) unlink(tfname);
+ if (dfname[0])
+ do {
+ do
+ (void) unlink(dfname);
+ while (dfname[2]-- != 'A');
+ dfname[2] = 'z';
+ } while (dfname[0]-- != 'd');
+ dfname[0] = '\0';
+}
+
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+static void
+#if __STDC__
+frecverr(const char *msg, ...)
+#else
+frecverr(msg, va_alist)
+ char *msg;
+ va_dcl
+#endif
+{
+ extern char *fromb;
+ va_list ap;
+#if __STDC__
+ va_start(ap, msg);
+#else
+ va_start(ap);
+#endif
+ rcleanup(0);
+ syslog(LOG_ERR, "%s", fromb);
+ vsyslog(LOG_ERR, msg, ap);
+ va_end(ap);
+ putchar('\1'); /* return error code */
+ exit(1);
+}
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