rwall from FreeBSD 1.1.5.1

Reviewed by:	Geoff
Submitted by:	Christopher G. Demetriou

1 files changed, 174 insertions, 0 deletions

diff --git a/usr.bin/rwall/rwall.c b/usr.bin/rwall/rwall.c
new file mode 100644
index 0000000..548b3c1
--- /dev/null
+++ b/usr.bin/rwall/rwall.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 1993 Christopher G. Demetriou
+ * Copyright (c) 1988, 1990 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
+char copyright[] =
+"@(#) Copyright (c) 1988 Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+/*static char sccsid[] = "from: @(#)wall.c	5.14 (Berkeley) 3/2/91";*/
+static char rcsid[] = "$Id: rwall.c,v 1.1 1993/09/16 01:11:04 jtc Exp $";
+#endif /* not lint */
+
+/*
+ * This program is not related to David Wall, whose Stanford Ph.D. thesis
+ * is entitled "Mechanisms for Broadcast and Selective Broadcast".
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/uio.h>
+#include <utmp.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <paths.h>
+
+#include <rpc/rpc.h>
+#include <rpcsvc/rwall.h>
+
+int mbufsize;
+char *mbuf;
+
+/* ARGSUSED */
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	char *wallhost, res;
+	CLIENT *cl;
+
+	if ((argc < 2) || (argc > 3)) {
+		fprintf(stderr, "usage: %s hostname [file]\n", argv[0]);
+		exit(1);
+	}
+
+	wallhost = argv[1];
+
+	makemsg(argv[2]);
+
+	/*
+	 * Create client "handle" used for calling MESSAGEPROG on the
+	 * server designated on the command line. We tell the rpc package
+	 * to use the "tcp" protocol when contacting the server.
+	*/
+	cl = clnt_create(wallhost, WALLPROG, WALLVERS, "udp");
+	if (cl == NULL) {
+		/*
+		 * Couldn't establish connection with server.
+		 * Print error message and die.
+		 */
+		clnt_pcreateerror(wallhost);
+		exit(1);
+	}
+
+	if (clnt_call(cl, WALLPROC_WALL, xdr_wrapstring, &mbuf, xdr_void, &res, NULL) != RPC_SUCCESS) {
+		/*
+		 * An error occurred while calling the server. 
+		 * Print error message and die.
+		 */
+		clnt_perror(cl, wallhost);
+		exit(1);
+	}
+
+	exit(0);
+}
+
+makemsg(fname)
+	char *fname;
+{
+	register int ch, cnt;
+	struct tm *lt;
+	struct passwd *pw;
+	struct stat sbuf;
+	time_t now, time();
+	FILE *fp;
+	int fd;
+	char *p, *whom, hostname[MAXHOSTNAMELEN], lbuf[100], tmpname[15];
+	char *getlogin(), *strcpy(), *ttyname();
+
+	(void)strcpy(tmpname, _PATH_TMP);
+	(void)strcat(tmpname, "/wall.XXXXXX");
+	if (!(fd = mkstemp(tmpname)) || !(fp = fdopen(fd, "r+"))) {
+		(void)fprintf(stderr, "wall: can't open temporary file.\n");
+		exit(1);
+	}
+	(void)unlink(tmpname);
+
+	if (!(whom = getlogin()))
+		whom = (pw = getpwuid(getuid())) ? pw->pw_name : "???";
+	(void)gethostname(hostname, sizeof(hostname));
+	(void)time(&now);
+	lt = localtime(&now);
+
+	/*
+	 * all this stuff is to blank out a square for the message;
+	 * we wrap message lines at column 79, not 80, because some
+	 * terminals wrap after 79, some do not, and we can't tell.
+	 * Which means that we may leave a non-blank character
+	 * in column 80, but that can't be helped.
+	 */
+	(void)fprintf(fp, "Remote Broadcast Message from %s@%s\n",
+	    whom, hostname);
+	(void)fprintf(fp, "        (%s) at %d:%02d ...\n", ttyname(2),
+	    lt->tm_hour, lt->tm_min);
+
+	putc('\n', fp);
+
+	if (fname && !(freopen(fname, "r", stdin))) {
+		(void)fprintf(stderr, "wall: can't read %s.\n", fname);
+		exit(1);
+	}
+	while (fgets(lbuf, sizeof(lbuf), stdin))
+		fputs(lbuf, fp);
+	rewind(fp);
+
+	if (fstat(fd, &sbuf)) {
+		(void)fprintf(stderr, "wall: can't stat temporary file.\n");
+		exit(1);
+	}
+	mbufsize = sbuf.st_size;
+	if (!(mbuf = malloc((u_int)mbufsize))) {
+		(void)fprintf(stderr, "wall: out of memory.\n");
+		exit(1);
+	}
+	if (fread(mbuf, sizeof(*mbuf), mbufsize, fp) != mbufsize) {
+		(void)fprintf(stderr, "wall: can't read temporary file.\n");
+		exit(1);
+	}
+	(void)close(fd);
+}