1 files changed, 392 insertions, 0 deletions
diff --git a/usr.sbin/lpr/common_source/rmjob.c b/usr.sbin/lpr/common_source/rmjob.c
new file mode 100644
index 0000000..c89a6f0
--- /dev/null
+++ b/usr.sbin/lpr/common_source/rmjob.c
@@ -0,0 +1,392 @@
+/*
+ * 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.
+ * 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.
+ */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)rmjob.c	8.2 (Berkeley) 4/28/95";
+#endif /* not lint */
+#endif
+
+#include "lp.cdefs.h"		/* A cross-platform version of <sys/cdefs.h> */
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/uio.h>
+
+#include <ctype.h>
+#include <dirent.h>
+#include <err.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#define psignal foil_gcc_psignal
+#define	sys_siglist foil_gcc_siglist
+#include <unistd.h>
+#undef psignal
+#undef sys_siglist
+
+#include "lp.h"
+#include "lp.local.h"
+#include "pathnames.h"
+
+/*
+ * rmjob - remove the specified jobs from the queue.
+ */
+
+/*
+ * Stuff for handling lprm specifications
+ */
+static char	root[] = "root";
+static int	all = 0;		/* eliminate all files (root only) */
+static int	cur_daemon;		/* daemon's pid */
+static char	current[7+MAXHOSTNAMELEN];  /* active control file name */
+
+static	void	alarmhandler(int _signo);
+static	void	do_unlink(char *_file);
+static int	 isowner(char *_owner, char *_file, const char *_cfhost);
+
+void
+rmjob(const char *printer)
+{
+	register int i, nitems;
+	int assassinated = 0;
+	struct dirent **files;
+	char *cp;
+	struct printer myprinter, *pp = &myprinter;
+
+	init_printer(pp);
+	if ((i = getprintcap(printer, pp)) < 0)
+		fatal(pp, "getprintcap: %s", pcaperr(i));
+	if ((cp = checkremote(pp))) {
+		printf("Warning: %s\n", cp);
+		free(cp);
+	}
+
+	/*
+	 * If the format was `lprm -' and the user isn't the super-user,
+	 *  then fake things to look like he said `lprm user'.
+	 */
+	if (users < 0) {
+		if (getuid() == 0)
+			all = 1;	/* all files in local queue */
+		else {
+			user[0] = person;
+			users = 1;
+		}
+	}
+	if (!strcmp(person, "-all")) {
+		if (from_host == local_host)
+			fatal(pp, "The login name \"-all\" is reserved");
+		all = 1;	/* all those from 'from_host' */
+		person = root;
+	}
+
+	PRIV_START
+	if (chdir(pp->spool_dir) < 0)
+		fatal(pp, "cannot chdir to spool directory");
+	if ((nitems = scandir(".", &files, iscf, NULL)) < 0)
+		fatal(pp, "cannot access spool directory");
+	PRIV_END
+
+	if (nitems) {
+		/*
+		 * Check for an active printer daemon (in which case we
+		 *  kill it if it is reading our file) then remove stuff
+		 *  (after which we have to restart the daemon).
+		 */
+		if (lockchk(pp, pp->lock_file) && chk(current)) {
+			PRIV_START
+			assassinated = kill(cur_daemon, SIGINT) == 0;
+			PRIV_END
+			if (!assassinated)
+				fatal(pp, "cannot kill printer daemon");
+		}
+		/*
+		 * process the files
+		 */
+		for (i = 0; i < nitems; i++)
+			process(pp, files[i]->d_name);
+	}
+	rmremote(pp);
+	/*
+	 * Restart the printer daemon if it was killed
+	 */
+	if (assassinated && !startdaemon(pp))
+		fatal(pp, "cannot restart printer daemon\n");
+	exit(0);
+}
+
+/*
+ * Process a lock file: collect the pid of the active
+ *  daemon and the file name of the active spool entry.
+ * Return boolean indicating existence of a lock file.
+ */
+int
+lockchk(struct printer *pp, char *slockf)
+{
+	register FILE *fp;
+	register int i, n;
+
+	PRIV_START
+	if ((fp = fopen(slockf, "r")) == NULL) {
+		if (errno == EACCES)
+			fatal(pp, "%s: %s", slockf, strerror(errno));
+		else
+			return(0);
+	}
+	PRIV_END
+	if (!getline(fp)) {
+		(void) fclose(fp);
+		return(0);		/* no daemon present */
+	}
+	cur_daemon = atoi(line);
+	if (kill(cur_daemon, 0) < 0 && errno != EPERM) {
+		(void) fclose(fp);
+		return(0);		/* no daemon present */
+	}
+	for (i = 1; (n = fread(current, sizeof(char), sizeof(current), fp)) <= 0; i++) {
+		if (i > 5) {
+			n = 1;
+			break;
+		}
+		sleep(i);
+	}
+	current[n-1] = '\0';
+	(void) fclose(fp);
+	return(1);
+}
+
+/*
+ * Process a control file.
+ */
+void
+process(const struct printer *pp, char *file)
+{
+	FILE *cfp;
+
+	if (!chk(file))
+		return;
+	PRIV_START
+	if ((cfp = fopen(file, "r")) == NULL)
+		fatal(pp, "cannot open %s", file);
+	PRIV_END
+	while (getline(cfp)) {
+		switch (line[0]) {
+		case 'U':  /* unlink associated files */
+			if (strchr(line+1, '/') || strncmp(line+1, "df", 2))
+				break;
+			do_unlink(line+1);
+		}
+	}
+	(void) fclose(cfp);
+	do_unlink(file);
+}
+
+static void
+do_unlink(char *file)
+{
+	int	ret;
+
+	if (from_host != local_host)
+		printf("%s: ", local_host);
+	PRIV_START
+	ret = unlink(file);
+	PRIV_END
+	printf(ret ? "cannot dequeue %s\n" : "%s dequeued\n", file);
+}
+
+/*
+ * Do the dirty work in checking
+ */
+int
+chk(char *file)
+{
+	int *r, jnum;
+	char **u;
+	const char *cfhost;
+	FILE *cfp;
+
+	/*
+	 * Check for valid cf file name (mostly checking current).
+	 */
+	if (strlen(file) < 7 || file[0] != 'c' || file[1] != 'f')
+		return(0);
+
+	jnum = calc_jobnum(file, &cfhost);
+	if (all && (from_host == local_host || !strcmp(from_host, cfhost)))
+		return(1);
+
+	/*
+	 * get the owner's name from the control file.
+	 */
+	PRIV_START
+	if ((cfp = fopen(file, "r")) == NULL)
+		return(0);
+	PRIV_END
+	while (getline(cfp)) {
+		if (line[0] == 'P')
+			break;
+	}
+	(void) fclose(cfp);
+	if (line[0] != 'P')
+		return(0);
+
+	if (users == 0 && requests == 0)
+		return(!strcmp(file, current) && isowner(line+1, file, cfhost));
+	/*
+	 * Check the request list
+	 */
+	for (r = requ; r < &requ[requests]; r++)
+		if (*r == jnum && isowner(line+1, file, cfhost))
+			return(1);
+	/*
+	 * Check to see if it's in the user list
+	 */
+	for (u = user; u < &user[users]; u++)
+		if (!strcmp(*u, line+1) && isowner(line+1, file, cfhost))
+			return(1);
+	return(0);
+}
+
+/*
+ * If root is removing a file on the local machine, allow it.
+ * If root is removing a file from a remote machine, only allow
+ * files sent from the remote machine to be removed.
+ * Normal users can only remove the file from where it was sent.
+ */
+static int
+isowner(char *owner, char *file, const char *cfhost)
+{
+	if (!strcmp(person, root) && (from_host == local_host ||
+	    !strcmp(from_host, cfhost)))
+		return (1);
+	if (!strcmp(person, owner) && !strcmp(from_host, cfhost))
+		return (1);
+	if (from_host != local_host)
+		printf("%s: ", local_host);
+	printf("%s: Permission denied\n", file);
+	return(0);
+}
+
+/*
+ * Check to see if we are sending files to a remote machine. If we are,
+ * then try removing files on the remote machine.
+ */
+void
+rmremote(const struct printer *pp)
+{
+	int i, elem, firstreq, niov, rem, totlen;
+	char buf[BUFSIZ];
+	void (*savealrm)(int);
+	struct iovec *iov;
+
+	if (!pp->remote)
+		return;	/* not sending to a remote machine */
+
+	/*
+	 * Flush stdout so the user can see what has been deleted
+	 * while we wait (possibly) for the connection.
+	 */
+	fflush(stdout);
+
+	/*
+	 * Counting:
+	 *	4 == "\5" + remote_queue + " " + person
+	 *	2 * users == " " + user[i] for each user
+	 *	requests == asprintf results for each request
+	 *	1 == "\n"
+	 * Although laborious, doing it this way makes it possible for
+	 * us to process requests of indeterminate length without
+	 * applying an arbitrary limit.  Arbitrary Limits Are Bad (tm).
+	 */
+	if (users > 0)
+		niov = 4 + 2 * users + requests + 1;
+	else
+		niov = 4 + requests + 1;
+	iov = malloc(niov * sizeof *iov);
+	if (iov == 0)
+		fatal(pp, "out of memory in rmremote()");
+	iov[0].iov_base = "\5";
+	iov[1].iov_base = pp->remote_queue;
+	iov[2].iov_base = " ";
+	iov[3].iov_base = all ? "-all" : person;
+	elem = 4;
+	for (i = 0; i < users; i++) {
+		iov[elem].iov_base = " ";
+		iov[elem + 1].iov_base = user[i];
+		elem += 2;
+	}
+	firstreq = elem;
+	for (i = 0; i < requests; i++) {
+		asprintf((char **)&iov[elem].iov_base, " %d", requ[i]);
+		if (iov[elem].iov_base == 0)
+			fatal(pp, "out of memory in rmremote()");
+		elem++;
+	}
+	iov[elem++].iov_base = "\n";
+	for (totlen = i = 0; i < niov; i++)
+		totlen += (iov[i].iov_len = strlen(iov[i].iov_base));
+
+	savealrm = signal(SIGALRM, alarmhandler);
+	alarm(pp->conn_timeout);
+	rem = getport(pp, pp->remote_host, 0);
+	(void)signal(SIGALRM, savealrm);
+	if (rem < 0) {
+		if (from_host != local_host)
+			printf("%s: ", local_host);
+		printf("connection to %s is down\n", pp->remote_host);
+	} else {
+		if (writev(rem, iov, niov) != totlen)
+			fatal(pp, "Lost connection");
+		while ((i = read(rem, buf, sizeof(buf))) > 0)
+			(void) fwrite(buf, 1, i, stdout);
+		(void) close(rem);
+	}
+	for (i = 0; i < requests; i++)
+		free(iov[firstreq + i].iov_base);
+	free(iov);
+}
+
+/*
+ * Return 1 if the filename begins with 'cf'
+ */
+int
+iscf(const struct dirent *d)
+{
+	return(d->d_name[0] == 'c' && d->d_name[1] == 'f');
+}
+
+void
+alarmhandler(int signo __unused)
+{
+	/* the signal is ignored */
+	/* (the '__unused' is just to avoid a compile-time warning) */
+}