Imported from util-linux-2.2 tarball.

1 files changed, 202 insertions, 0 deletions

diff --git a/login-utils/wall.c b/login-utils/wall.c
new file mode 100644
index 000000000..b10badbac
--- /dev/null
+++ b/login-utils/wall.c
@@ -0,0 +1,202 @@
+/*
+ * 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.
+ *
+ * Modified for Linux, Mon Mar  8 18:08:30 1993, faith@cs.unc.edu
+ */
+
+#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[] = "@(#)wall.c	5.14 (Berkeley) 3/2/91";
+#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>
+
+#define	IGNOREUSER	"sleeper"
+
+int nobanner;
+int mbufsize;
+char *mbuf;
+
+/* ARGSUSED */
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	extern int optind;
+	int ch;
+	struct iovec iov;
+	struct utmp utmp;
+	FILE *fp;
+	char *p, *ttymsg();
+
+	while ((ch = getopt(argc, argv, "n")) != EOF)
+		switch (ch) {
+		case 'n':
+			/* undoc option for shutdown: suppress banner */
+			if (geteuid() == 0)
+				nobanner = 1;
+			break;
+		case '?':
+		default:
+usage:
+			(void)fprintf(stderr, "usage: wall [file]\n");
+			exit(1);
+		}
+	argc -= optind;
+	argv += optind;
+	if (argc > 1)
+		goto usage;
+
+#ifdef __linux__
+	if (argc != 1)
+	      makemsg("");
+	else
+#endif
+	makemsg(*argv);
+
+	if (!(fp = fopen(_PATH_UTMP, "r"))) {
+		(void)fprintf(stderr, "wall: cannot read %s.\n", _PATH_UTMP);
+		exit(1);
+	}
+	iov.iov_base = mbuf;
+	iov.iov_len = mbufsize;
+	/* NOSTRICT */
+	while (fread((char *)&utmp, sizeof(utmp), 1, fp) == 1) {
+		if (!utmp.ut_name[0] ||
+		    !strncmp(utmp.ut_name, IGNOREUSER, sizeof(utmp.ut_name)))
+			continue;
+#ifdef __linux__
+		if (utmp.ut_type != USER_PROCESS)
+		      continue;
+#endif
+		if (p = ttymsg(&iov, 1, utmp.ut_line))
+			(void)fprintf(stderr, "wall: %s\n", p);
+	}
+	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 (!nobanner) {
+		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, "\r%79s\r\n", " ");
+		(void)sprintf(lbuf, "Broadcast Message from %s@%s",
+		    whom, hostname);
+		(void)fprintf(fp, "%-79.79s\007\007\r\n", lbuf);
+		(void)sprintf(lbuf, "        (%s) at %d:%02d ...", ttyname(2),
+		    lt->tm_hour, lt->tm_min);
+		(void)fprintf(fp, "%-79.79s\r\n", lbuf);
+	}
+	(void)fprintf(fp, "%79s\r\n", " ");
+
+	if (*fname && !(freopen(fname, "r", stdin))) {
+		(void)fprintf(stderr, "wall: can't read %s.\n", fname);
+		exit(1);
+	}
+	while (fgets(lbuf, sizeof(lbuf), stdin))
+		for (cnt = 0, p = lbuf; ch = *p; ++p, ++cnt) {
+			if (cnt == 79 || ch == '\n') {
+				for (; cnt < 79; ++cnt)
+					putc(' ', fp);
+				putc('\r', fp);
+				putc('\n', fp);
+				cnt = 0;
+			} else
+				putc(ch, fp);
+		}
+	(void)fprintf(fp, "%79s\r\n", " ");
+	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);
+}