1 files changed, 148 insertions, 0 deletions
diff --git a/usr.bin/finger/net.c b/usr.bin/finger/net.c
new file mode 100644
index 0000000..51f1b43
--- /dev/null
+++ b/usr.bin/finger/net.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
+ *
+ * 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 sccsid[] = "@(#)net.c	8.3 (Berkeley) 1/2/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <db.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <utmp.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include "finger.h"
+
+void
+netfinger(name)
+	char *name;
+{
+	extern int lflag;
+	register FILE *fp;
+	register int c, lastc;
+	struct in_addr defaddr;
+	struct hostent *hp, def;
+	struct servent *sp;
+	struct sockaddr_in sin;
+	int s;
+	char *alist[1], *host;
+
+	if (!(host = rindex(name, '@')))
+		return;
+	*host++ = NULL;
+	if (isdigit(*host) && (defaddr.s_addr = inet_addr(host)) != -1) {
+		def.h_name = host;
+		def.h_addr_list = alist;
+		def.h_addr = (char *)&defaddr;
+		def.h_length = sizeof(struct in_addr);
+		def.h_addrtype = AF_INET;
+		def.h_aliases = 0;
+		hp = &def;
+	} else if (!(hp = gethostbyname(host))) {
+		(void)fprintf(stderr,
+		    "finger: unknown host: %s\n", host);
+		return;
+	}
+	if (!(sp = getservbyname("finger", "tcp"))) {
+		(void)fprintf(stderr, "finger: tcp/finger: unknown service\n");
+		return;
+	}
+	sin.sin_family = hp->h_addrtype;
+	bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
+	sin.sin_port = sp->s_port;
+	if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
+		perror("finger: socket");
+		return;
+	}
+
+	/* have network connection; identify the host connected with */
+	(void)printf("[%s]\n", hp->h_name);
+	if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
+		perror("finger: connect");
+		(void)close(s);
+		return;
+	}
+
+	/* -l flag for remote fingerd  */
+	if (lflag)
+		write(s, "/W ", 3);
+	/* send the name followed by <CR><LF> */
+	(void)write(s, name, strlen(name));
+	(void)write(s, "\r\n", 2);
+
+	/*
+	 * Read from the remote system; once we're connected, we assume some
+	 * data.  If none arrives, we hang until the user interrupts.
+	 *
+	 * If we see a <CR> or a <CR> with the high bit set, treat it as
+	 * a newline; if followed by a newline character, only output one
+	 * newline.
+	 *
+	 * Otherwise, all high bits are stripped; if it isn't printable and
+	 * it isn't a space, we can simply set the 7th bit.  Every ASCII
+	 * character with bit 7 set is printable.
+	 */ 
+	if (fp = fdopen(s, "r"))
+		while ((c = getc(fp)) != EOF) {
+			c &= 0x7f;
+			if (c == 0x0d) {
+				if (lastc == '\r')	/* ^M^M - skip dupes */
+					continue;
+				c = '\n';
+				lastc = '\r';
+			} else {
+				if (!isprint(c) && !isspace(c))
+					c |= 0x40;
+				if (lastc != '\r' || c != '\n')
+					lastc = c;
+				else {
+					lastc = '\n';
+					continue;
+				}
+			}
+			putchar(c);
+		}
+	if (lastc != '\n')
+		putchar('\n');
+	putchar('\n');
+	(void)fclose(fp);
+}