File: [local] / src / usr.bin / telnet / main.c (download)
Revision 1.37, Sun Dec 4 23:50:49 2022 UTC (18 months ago) by cheloha
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, HEAD Changes since 1.36: +1 -2 lines
userspace: remove vestigial '?' cases from top-level getopt(3) loops
getopt(3) returns '?' when it encounters a flag not present in the in
the optstring or if a flag is missing its option argument. We can
handle this case with the "default" failure case with no loss of
legibility. Hence, remove all the redundant "case '?':" lines.
Prompted by dlg@. With help from dlg@ and millert@.
Link: https://marc.info/?l=openbsd-tech&m=167011979726449&w=2
ok naddy@ millert@ dlg@
|
/* $OpenBSD: main.c,v 1.37 2022/12/04 23:50:49 cheloha Exp $ */
/* $NetBSD: main.c,v 1.5 1996/02/28 21:04:05 thorpej Exp $ */
/*
* Copyright (c) 1988, 1990, 1993
* The 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. 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.
*/
#include "telnet_locl.h"
#include <sys/socket.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int family = AF_UNSPEC;
int rtableid = -1;
/*
* Initialize variables.
*/
void
tninit(void)
{
init_terminal();
init_network();
init_telnet();
init_sys();
}
static __dead void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr,
"usage: %s [-4678acDEKLr] [-b hostalias] [-e escapechar] "
"[-l user]\n"
"\t[-n tracefile] [-V rtable] [host [port]]\n",
__progname);
exit(1);
}
/*
* main. Parse arguments, invoke the protocol or command parser.
*/
int
main(int argc, char *argv[])
{
int ch;
extern char *__progname;
char *user, *alias;
const char *errstr;
tninit(); /* Clear out things */
TerminalSaveState();
prompt = __progname;
user = alias = NULL;
rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE;
autologin = -1;
while ((ch = getopt(argc, argv, "4678ab:cDEe:KLl:n:rV:"))
!= -1) {
switch(ch) {
case '4':
family = AF_INET;
break;
case '6':
family = AF_INET6;
break;
case '7':
eight = 0;
break;
case '8':
eight = 3; /* binary output and input */
break;
case 'a':
autologin = 1;
break;
case 'b':
alias = optarg;
break;
case 'c':
skiprc = 1;
break;
case 'D': {
/* sometimes we don't want a mangled display */
char *p;
if((p = getenv("DISPLAY")))
env_define("DISPLAY", (unsigned char*)p);
break;
}
case 'E':
rlogin = escape = _POSIX_VDISABLE;
break;
case 'e':
set_escape_char(optarg);
break;
case 'K':
autologin = 0;
break;
case 'L':
eight |= 2; /* binary output only */
break;
case 'l':
autologin = -1;
user = optarg;
break;
case 'n':
SetNetTrace(optarg);
break;
case 'r':
rlogin = '~';
break;
case 'V':
rtableid = (int)strtonum(optarg, 0,
RT_TABLEID_MAX, &errstr);
if (errstr) {
fprintf(stderr, "%s: Warning: "
"-V ignored, rtable %s: %s\n",
prompt, errstr, optarg);
}
break;
default:
usage();
}
}
if (rtableid >= 0)
if (setrtable(rtableid) == -1) {
perror("setrtable");
exit(1);
}
if (pledge("stdio rpath wpath getpw dns inet tty", NULL) == -1) {
perror("pledge");
exit(1);
}
if (autologin == -1)
autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1;
argc -= optind;
argv += optind;
if (argc) {
char *args[8], **argp = args;
if (argc > 2)
usage();
*argp++ = prompt;
if (user) {
*argp++ = "-l";
*argp++ = user;
}
if (alias) {
*argp++ = "-b";
*argp++ = alias;
}
*argp++ = argv[0]; /* host */
if (argc > 1)
*argp++ = argv[1]; /* port */
*argp = NULL;
if (setjmp(toplevel) != 0)
Exit(0);
if (tn(argp - args, args) == 1)
return (0);
else
return (1);
}
(void)setjmp(toplevel);
for (;;) {
command(1, NULL, 0);
}
return 0;
}