Ticket History #636: The displaying of /etc/issus.net at login with telnetd

From mwolf@premtec.com Fri Sep 25 08:48:44 1998
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Date: Fri, 25 Sep 1998 08:48:42 -0400 (EDT)
From: "Matthew J. Wolf" <mwolf@premtec.com>
To: krb5-bugs@MIT.EDU
Subject: My Problem Report


I sent in a Problem Report that did not have my Reply-To address.
the Originator of Problem Report is "Matthew J. Wolf" and the
Organization of Problem Report was "Premiere Communications Inc". Also
the Category was "krb5-clients" which was wrong. The Category should have
been telnet. Lasty my email adress is "mwolf@premtec.com"

Thanks,
Matthew Wolf

--------------------------------------------------------------------------
Matthew J. Wolf | Premiere Communications Inc
Network Engineer | 3399 Peachtree Road, NE
Phone: (404)504-2359 Fax: (404)262-8516 | The Lenox Building, Suite 600
E-mail: mwolf@premtec.com | Atlanta, Georgia 30326-1120
--------------------------------------------------------------------------


State-Changed-From-To: open-closed
State-Changed-By: raeburn
State-Changed-When: Tue Jul 6 21:17:04 1999
State-Changed-Why:

Edited PR 636 to reflect the address suggested.

From mwolf@clan.premtec.com Fri Sep 25 08:33:10 1998
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Date: Fri, 25 Sep 1998 08:32:57 -0400
From: "Matthew J. Wolf" <mwolf@premtec.com>
Reply-To: mwolf@premtec.com
To: krb5-bugs@MIT.EDU
Subject: Linux Redhat and /etc/issus.net
X-Send-Pr-Version: 3.99

Premiere Communications Inc
X
RedHat Linux Ver. 5.1 /w glibc-2.0.7

System: Linux clan.premtec.com 2.0.35 #1 Thu Jul 23 14:01:04 EDT 1998 i686 unknown
Architecture: i686


The default string than is displayed (4.4 BSD UNIX) when some one logs into a
box runinng telnetd is the string that is displayed by the normal telnetd in
Redhat Linux. I hacked ext.h and utility.c to display the contence of
/etc/issue.net with is what the normal telnetd does under Redhat Linux. I use
the source from the linux source "netkit-telnet-0.10" to make my changes.

In ext.h I added another value for DEFAULT_IM .
In utility.c I added " #include <sys/utsname.h> " which was need for a
struct of type utsname and with was needed by some cases that I added to
PUTF().



Here are the context diffs.


*** src/appl/telnet/telnetd/ext.h.org Fri Feb 6 22:41:47 1998
--- src/appl/telnet/telnetd/ext.h Thu Sep 24 09:00:15 1998
***************
*** 223,241 ****
#ifndef DEFAULT_IM
# ifdef CRAY
# define DEFAULT_IM "\r\n\r\nCray UNICOS (%h) (%t)\r\n\r\r\n\r"
- # else
- # ifdef sun
- # ifdef __SVR4
- # define DEFAULT_IM "\r\n\r\nUNIX(r) System V Release 4.0 (%h) (%t)\r\n\r\r\n\r"
- # else
- # define DEFAULT_IM "\r\n\r\nSunOS UNIX (%h) (%t)\r\n\r\r\n\r"
- # endif
# else
! # ifdef ultrix
! # define DEFAULT_IM "\r\n\r\nULTRIX (%h) (%t)\r\n\r\r\n\r"
# else
! # define DEFAULT_IM "\r\n\r\n4.4 BSD UNIX (%h) (%t)\r\n\r\r\n\r"
! # endif
# endif
# endif
#endif
--- 223,245 ----
#ifndef DEFAULT_IM
# ifdef CRAY
# define DEFAULT_IM "\r\n\r\nCray UNICOS (%h) (%t)\r\n\r\r\n\r"
# else
! # ifdef __linux__
! # define DEFAULT_IM "%i\r\n%s %r (%h) (%t)\r\n\r\n"
! # else
! # ifdef sun
! # ifdef __SVR4
! # define DEFAULT_IM "\r\n\r\nUNIX(r) System V Release 4.0 (%h) (%t)\r\n\r\r\n\r"
! # else
! # define DEFAULT_IM "\r\n\r\nSunOS UNIX (%h) (%t)\r\n\r\r\n\r"
! # endif
# else
! # ifdef ultrix
! # define DEFAULT_IM "\r\n\r\nULTRIX (%h) (%t)\r\n\r\r\n\r"
! # else
! # define DEFAULT_IM "\r\n\r\n4.4 BSD UNIX (%h) (%t)\r\n\r\r\n\r"
! # endif
! # endif
# endif
# endif
#endif


*** src/appl/telnet/telnetd/utility.c.org Thu Sep 24 09:28:35 1998
--- src/appl/telnet/telnetd/utility.c Thu Sep 24 10:51:31 1998
***************
*** 33,40 ****
--- 33,43 ----

/* based on @(#)utility.c 8.1 (Berkeley) 6/4/93 */

+ #define ISSUE_FILE = "/etc/issue.net"
+
#define PRINTOPTIONS
#include "telnetd.h"
+ #include <sys/utsname.h>

/*
* utility functions performing io related tasks
***************
*** 374,379 ****
--- 377,383 ----
}

char editedhost[32];
+ struct utsname kerninfo;

void
edithost(pat, host)
***************
*** 476,489 ****
break;

case 'd':
! (void)time(&t);
! (void)strftime(db, sizeof(db), fmtstr, localtime(&t));
! putstr(db);
! break;

- case '%':
- putchr('%');
- break;
}
cp++;
}
--- 480,559 ----
break;

case 'd':
! (void)time(&t);
! (void)strftime(db, sizeof(db), fmtstr, localtime(&t));
! putstr(db);
! break;
!
! case '%':
! putchr('%');
! break;
!
! case 'D':
! {
! char buff[128];
!
! if (getdomainname(buff,sizeof(buff)) < 0
! || buff[0] == '\0'
! || strcmp(buff, "(none)") == 0)
! break;
! putstr(buff);
! }
! break;
!
! case 'i':
! {
! char buff[3];
! FILE *fp;
! int p, c;
!
! if ((fp = fopen("/etc/issue.net", "r")) == NULL)
! break;
! p = '\n';
! while ((c = fgetc(fp)) != EOF) {
! if (p == '\n' && c == '#') {
! do {
! c = fgetc(fp);
! } while (c != EOF && c != '\n');
! continue;
! } else if (c == '%') {
! buff[0] = c;
! c = fgetc(fp);
! if (c == EOF) break;
! buff[1] = c;
! buff[2] = '\0';
! putf(buff, NULL);
! } else {
! if (c == '\n') putchr('\r');
! putchr(c);
! p = c;
! }
! };
! (void) fclose(fp);
! }
! return; /* ignore remainder of the banner string */
!
! case 's':
! putstr(kerninfo.sysname);
! break;
!
! case 'm':
! putstr(kerninfo.machine);
! break;
!
! case 'r':
! putstr(kerninfo.release);
! break;
!
!
! case 'v':
! #ifdef __linux__
! putstr(kerninfo.version);
! #else
! puts(kerninfo.version);
! #endif
! break;

}
cp++;
}

[edited header addresses to be those described in pr 637 from same
person. --raeburn 1999-07-06]