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Current Path: /usr/src/contrib/tcp_wrappers

📁 ..
📄 BLURB(1.7 KB)
📄 Banners.Makefile(2.17 KB)
📄 CHANGES(18.75 KB)
📄 DISCLAIMER(1.21 KB)
📄 Makefile(32.68 KB)
📄 README(47.08 KB)
📄 README.IRIX(2.57 KB)
📄 README.NIS(6.52 KB)
📄 clean_exit.c(1.07 KB)
📄 diag.c(1.44 KB)
📄 environ.c(4.75 KB)
📄 eval.c(3.59 KB)
📄 fakelog.c(1012 B)
📄 fix_options.c(3.7 KB)
📄 fromhost.c(1.37 KB)
📄 hosts_access.3(3.52 KB)
📄 hosts_access.5(15.97 KB)
📄 hosts_access.c(14.13 KB)
📄 hosts_ctl.c(1.08 KB)
📄 hosts_options.5(6.5 KB)
📄 inetcf.c(8.03 KB)
📄 inetcf.h(516 B)
📄 misc.c(1.9 KB)
📄 miscd.c(3.07 KB)
📄 mystdarg.h(571 B)
📄 myvsyslog.c(766 B)
📄 ncr.c(2.52 KB)
📄 options.c(13.85 KB)
📄 patchlevel.h(88 B)
📄 percent_m.c(797 B)
📄 percent_x.c(2.37 KB)
📄 printf.ck(39 B)
📄 ptx.c(2.65 KB)
📄 refuse.c(911 B)
📄 rfc931.c(5.95 KB)
📄 safe_finger.c(4.98 KB)
📄 scaffold.c(6.38 KB)
📄 scaffold.h(370 B)
📄 setenv.c(931 B)
📄 shell_cmd.c(2.13 KB)
📄 socket.c(12.06 KB)
📄 strcasecmp.c(3.78 KB)
📄 tcpd.8(6.86 KB)
📄 tcpd.c(3.49 KB)
📄 tcpd.h(8.18 KB)
📄 tcpdchk.8(2.51 KB)
📄 tcpdchk.c(12.84 KB)
📄 tcpdmatch.8(3.18 KB)
📄 tcpdmatch.c(10.69 KB)
📄 tli-sequent.c(4.85 KB)
📄 tli-sequent.h(411 B)
📄 tli.c(10.34 KB)
📄 try-from.c(2.01 KB)
📄 update.c(3.05 KB)
📄 vfprintf.c(3.12 KB)
📄 workarounds.c(7.57 KB)

Editing: try-from.c

/*
  * This program can be called via a remote shell command to find out if the
  * hostname and address are properly recognized, if username lookup works,
  * and (SysV only) if the TLI on top of IP heuristics work.
  * 
  * Example: "rsh host /some/where/try-from".
  * 
  * Diagnostics are reported through syslog(3) and redirected to stderr.
  * 
  * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  */

#ifndef lint
static char sccsid[] = "@(#) try-from.c 1.2 94/12/28 17:42:55";
#endif

/* System libraries. */

#include <sys/types.h>
#include <stdio.h>
#include <syslog.h>
#include <string.h>

#ifdef TLI
#include <sys/tiuser.h>
#include <stropts.h>
#endif

#ifndef STDIN_FILENO
#define	STDIN_FILENO	0
#endif

/* Local stuff. */

#include "tcpd.h"

int     allow_severity = SEVERITY;	/* run-time adjustable */
int     deny_severity = LOG_WARNING;	/* ditto */

main(argc, argv)
int     argc;
char  **argv;
{
    struct request_info request;
    char    buf[BUFSIZ];
    char   *cp;

/*
     * Simplify the process name, just like tcpd would.
     */
    if ((cp = strrchr(argv[0], '/')) != 0)
	argv[0] = cp + 1;

/*
     * Turn on the "IP-underneath-TLI" detection heuristics.
     */
#ifdef TLI
    if (ioctl(0, I_FIND, "timod") == 0)
	ioctl(0, I_PUSH, "timod");
#endif /* TLI */

/*
     * Look up the endpoint information.
     */
    request_init(&request, RQ_DAEMON, argv[0], RQ_FILE, STDIN_FILENO, 0);
    (void) fromhost(&request);

/*
     * Show some results. Name and address information is looked up when we
     * ask for it.
     */

#define EXPAND(str) percent_x(buf, sizeof(buf), str, &request)

puts(EXPAND("client address  (%%a): %a"));
    puts(EXPAND("client hostname (%%n): %n"));
    puts(EXPAND("client username (%%u): %u"));
    puts(EXPAND("client info     (%%c): %c"));
    puts(EXPAND("server address  (%%A): %A"));
    puts(EXPAND("server hostname (%%N): %N"));
    puts(EXPAND("server process  (%%d): %d"));
    puts(EXPAND("server info     (%%s): %s"));

return (0);
}

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Editing: try-from.c

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