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ppp/chat/chat.c
Paul Mackerras d0c04daa27 chat: Add copyright notice 
This adds a copyright notice in my name with MIT licence permissions
to this file.  The reason is primarily to provide a concrete statement
of permission to use, copy, modify and distribute the program, for the
sake of those who are uncertain about meaning of the public domain.
See for example https://github.com/ppp-project/ppp/issues/474 .
Given that I have maintained this program for 25 years, it seems
reasonable for it to be my copyright on it.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2024-09-18 13:48:54 +10:00

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/* SPDX-License-Identifier: MIT */
/*
* Chat -- a program for automatic session establishment (i.e. dial
* the phone and log in).
*
* This version is Copyright 1995-2023 Paul Mackerras <paulus@ozlabs.org>
* based on the original public-domain version by Karl Fox.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the “Software”), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*
* Standard termination codes:
* 0 - successful completion of the script
* 1 - invalid argument, expect string too large, etc.
* 2 - error on an I/O operation or fatal error condition.
* 3 - timeout waiting for a simple string.
* 4 - the first string declared as "ABORT"
* 5 - the second string declared as "ABORT"
* 6 - ... and so on for successive ABORT strings.
*
*
* -----------------
* 22-May-99 added environment substitutuion, enabled with -E switch.
* Andreas Arens <andras@cityweb.de>.
*
* 12-May-99 added a feature to read data to be sent from a file,
* if the send string starts with @. Idea from gpk <gpk@onramp.net>.
*
* added -T and -U option and \T and \U substitution to pass a phone
* number into chat script. Two are needed for some ISDN TA applications.
* Keith Dart <kdart@cisco.com>
*
*
* Added SAY keyword to send output to stderr.
* This allows to turn ECHO OFF and to output specific, user selected,
* text to give progress messages. This best works when stderr
* exists (i.e.: pppd in nodetach mode).
*
* Added HANGUP directives to allow for us to be called
* back. When HANGUP is set to NO, chat will not hangup at HUP signal.
* We rely on timeouts in that case.
*
* Added CLR_ABORT to clear previously set ABORT string. This has been
* dictated by the HANGUP above as "NO CARRIER" (for example) must be
* an ABORT condition until we know the other host is going to close
* the connection for call back. As soon as we have completed the
* first stage of the call back sequence, "NO CARRIER" is a valid, non
* fatal string. As soon as we got called back (probably get "CONNECT"),
* we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command.
* Note that CLR_ABORT packs the abort_strings[] array so that we do not
* have unused entries not being reclaimed.
*
* In the same vein as above, added CLR_REPORT keyword.
*
* Allow for comments. Line starting with '#' are comments and are
* ignored. If a '#' is to be expected as the first character, the
* expect string must be quoted.
*
*
* Francis Demierre <Francis@SwissMail.Com>
* Thu May 15 17:15:40 MET DST 1997
*
*
* Added -r "report file" switch & REPORT keyword.
* Robert Geer <bgeer@xmission.com>
*
* Added -s "use stderr" and -S "don't use syslog" switches.
* June 18, 1997
* Karl O. Pinc <kop@meme.com>
*
*
* Added -e "echo" switch & ECHO keyword
* Dick Streefland <dicks@tasking.nl>
*
*
* Considerable updates and modifications by
* Al Longyear <longyear@pobox.com>
* Paul Mackerras <paulus@cs.anu.edu.au>
*
*
* The original author is:
*
* Karl Fox <karl@MorningStar.Com>
* Morning Star Technologies, Inc.
* 1760 Zollinger Road
* Columbus, OH 43221
* (614)451-1883
*
*/
#include <stdio.h>
#include <ctype.h>
#include <time.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <syslog.h>
#include <stdarg.h>
#ifndef TERMIO
#undef TERMIOS
#define TERMIOS
#endif
#ifdef TERMIO
#include <termio.h>
#endif
#ifdef TERMIOS
#include <termios.h>
#endif
#define STR_LEN 1024
#ifndef SIGTYPE
#define SIGTYPE void
#endif
#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
#ifdef SUNOS
extern int sys_nerr;
extern char *sys_errlist[];
#define memmove(to, from, n) bcopy(from, to, n)
#define strerror(n) ((unsigned)(n) < sys_nerr? sys_errlist[(n)] :\
"unknown error")
#endif
/*************** Micro getopt() *********************************************/
#define OPTION(c,v) (_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
(--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
&&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
#define OPTARG(c,v) (_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
(_O=4,(char*)0):(char*)0)
#define OPTONLYARG(c,v) (_O&2&&**v?(_O=1,--c,*v++):(char*)0)
#define ARG(c,v) (c?(--c,*v++):(char*)0)
static int _O = 0; /* Internal state */
/*************** Micro getopt() *********************************************/
char *program_name;
#define MAX_ABORTS 50
#define MAX_REPORTS 50
#define DEFAULT_CHAT_TIMEOUT 45
int echo = 0;
int verbose = 0;
int to_log = 1;
int to_stderr = 0;
int Verbose = 0;
int quiet = 0;
int report = 0;
int use_env = 0;
int exit_code = 0;
FILE* report_fp = (FILE *) 0;
char *report_file = (char *) 0;
char *chat_file = (char *) 0;
char *phone_num = (char *) 0;
char *phone_num2 = (char *) 0;
int timeout = DEFAULT_CHAT_TIMEOUT;
int have_tty_parameters = 0;
#ifdef TERMIO
#define term_parms struct termio
#define get_term_param(param) ioctl(0, TCGETA, param)
#define set_term_param(param) ioctl(0, TCSETA, param)
struct termio saved_tty_parameters;
#endif
#ifdef TERMIOS
#define term_parms struct termios
#define get_term_param(param) tcgetattr(0, param)
#define set_term_param(param) tcsetattr(0, TCSANOW, param)
struct termios saved_tty_parameters;
#endif
char *abort_string[MAX_ABORTS], *fail_reason = (char *)0,
fail_buffer[50];
int n_aborts = 0, abort_next = 0, timeout_next = 0, echo_next = 0;
int clear_abort_next = 0;
char *report_string[MAX_REPORTS] ;
char report_buffer[4096] ;
int n_reports = 0, report_next = 0, report_gathering = 0 ;
int clear_report_next = 0;
int say_next = 0, hup_next = 0;
void *dup_mem (void *b, size_t c);
void *copy_of (char *s);
char *grow (char *s, char **p, size_t len);
void usage (void);
void msgf (const char *fmt, ...);
void fatal (int code, const char *fmt, ...);
SIGTYPE sigalrm (int signo);
SIGTYPE sigint (int signo);
SIGTYPE sigterm (int signo);
SIGTYPE sighup (int signo);
void checksigs(void);
void init (void);
void set_tty_parameters (void);
int echo_stderr (int);
void break_sequence (void);
void terminate (int status);
void do_file (char *chat_file);
int get_string (register char *string);
int put_string (register char *s);
int write_char (int c);
int put_char (int c);
int get_char (void);
int chat_send (register char *s);
char *character (int c);
void chat_expect (register char *s);
char *clean (register char *s, int sending);
void break_sequence (void);
void pack_array (char **array, int end);
char *expect_strtok (char *, char *);
int vfmtmsg (char *, int, const char *, va_list); /* vsprintf++ */
int main (int, char *[]);
void *dup_mem(void *b, size_t c)
{
void *ans = malloc (c);
if (!ans)
fatal(2, "memory error!");
memcpy (ans, b, c);
return ans;
}
void *copy_of (char *s)
{
return dup_mem (s, strlen (s) + 1);
}
/* grow a char buffer and keep a pointer offset */
char *grow(char *s, char **p, size_t len)
{
size_t l = *p - s; /* save p as distance into s */
s = realloc(s, len);
if (!s)
fatal(2, "memory error!");
*p = s + l; /* restore p */
return s;
}
/*
* chat [ -v ] [ -E ] [ -T number ] [ -U number ] [ -t timeout ] [ -f chat-file ] \
* [ -r report-file ] \
* [...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
*
* Perform a UUCP-dialer-like chat script on stdin and stdout.
*/
int
main(int argc, char **argv)
{
int option;
char *arg;
program_name = *argv;
tzset();
while ((option = OPTION(argc, argv)) != 0) {
switch (option) {
case 'e':
++echo;
break;
case 'E':
++use_env;
break;
case 'v':
++verbose;
break;
case 'V':
++Verbose;
break;
case 's':
++to_stderr;
break;
case 'S':
to_log = 0;
break;
case 'f':
if ((arg = OPTARG(argc, argv)) != NULL)
chat_file = copy_of(arg);
else
usage();
break;
case 't':
if ((arg = OPTARG(argc, argv)) != NULL)
timeout = atoi(arg);
else
usage();
break;
case 'r':
arg = OPTARG (argc, argv);
if (arg) {
if (report_fp != NULL)
fclose (report_fp);
report_file = copy_of (arg);
report_fp = fopen (report_file, "a");
if (report_fp != NULL) {
if (verbose)
fprintf (report_fp, "Opening \"%s\"...\n",
report_file);
report = 1;
}
}
break;
case 'T':
if ((arg = OPTARG(argc, argv)) != NULL)
phone_num = copy_of(arg);
else
usage();
break;
case 'U':
if ((arg = OPTARG(argc, argv)) != NULL)
phone_num2 = copy_of(arg);
else
usage();
break;
default:
usage();
break;
}
}
/*
* Default the report file to the stderr location
*/
if (report_fp == NULL)
report_fp = stderr;
if (to_log) {
openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2);
if (verbose)
setlogmask(LOG_UPTO(LOG_INFO));
else
setlogmask(LOG_UPTO(LOG_WARNING));
}
init();
if (chat_file != NULL) {
arg = ARG(argc, argv);
if (arg != NULL)
usage();
else
do_file (chat_file);
} else {
while ((arg = ARG(argc, argv)) != NULL) {
chat_expect(arg);
if ((arg = ARG(argc, argv)) != NULL)
chat_send(arg);
checksigs();
}
}
terminate(0);
return 0;
}
/*
* Process a chat script when read from a file.
*/
void do_file (char *chat_file)
{
int linect, sendflg;
char *sp, *arg, quote;
char buf [STR_LEN];
FILE *cfp;
cfp = fopen (chat_file, "r");
if (cfp == NULL)
fatal(1, "%s -- open failed: %m", chat_file);
linect = 0;
sendflg = 0;
while (fgets(buf, STR_LEN, cfp) != NULL) {
sp = strchr (buf, '\n');
if (sp)
*sp = '\0';
linect++;
sp = buf;
/* lines starting with '#' are comments. If a real '#'
is to be expected, it should be quoted .... */
if ( *sp == '#' )
continue;
while (*sp != '\0') {
if (*sp == ' ' || *sp == '\t') {
++sp;
continue;
}
if (*sp == '"' || *sp == '\'') {
quote = *sp++;
arg = sp;
while (*sp != quote) {
if (*sp == '\0')
fatal(1, "unterminated quote (line %d)", linect);
if (*sp++ == '\\') {
if (*sp != '\0')
++sp;
}
}
}
else {
arg = sp;
while (*sp != '\0' && *sp != ' ' && *sp != '\t')
++sp;
}
if (*sp != '\0')
*sp++ = '\0';
if (sendflg)
chat_send (arg);
else
chat_expect (arg);
sendflg = !sendflg;
checksigs();
}
}
checksigs();
fclose (cfp);
}
/*
* We got an error parsing the command line.
*/
void usage(void)
{
fprintf(stderr, "\
Usage: %s [-e] [-E] [-v] [-V] [-t timeout] [-r report-file]\n\
[-T phone-number] [-U phone-number2] {-f chat-file | chat-script}\n", program_name);
exit(1);
}
char line[1024];
/*
* Send a message to syslog and/or stderr.
*/
void msgf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vfmtmsg(line, sizeof(line), fmt, args);
if (to_log)
syslog(LOG_INFO, "%s", line);
if (to_stderr)
fprintf(stderr, "%s\n", line);
va_end(args);
}
/*
* Print an error message and terminate.
*/
void fatal(int code, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vfmtmsg(line, sizeof(line), fmt, args);
if (to_log)
syslog(LOG_ERR, "%s", line);
if (to_stderr)
fprintf(stderr, "%s\n", line);
va_end(args);
terminate(code);
}
int alarmed = 0;
int alarmsig = 0;
SIGTYPE sigalrm(int signo)
{
int flags;
alarm(1);
alarmed = 1;
alarmsig = 1;
}
const char *fatalsig = NULL;
SIGTYPE sigint(int signo)
{
fatalsig = "SIGINT";
}
SIGTYPE sigterm(int signo)
{
fatalsig = "SIGTERM";
}
SIGTYPE sighup(int signo)
{
fatalsig = "SIGHUP";
}
void checksigs(void)
{
int err;
const char *signame;
if (fatalsig) {
signame = fatalsig;
fatalsig = NULL;
alarmsig = 0;
fatal(2, signame);
}
if (alarmsig && verbose) {
err = errno;
msgf("alarm");
errno = err;
alarmsig = 0;
}
}
void init(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sigint;
sigaction(SIGINT, &sa, NULL);
sa.sa_handler = sigterm;
sigaction(SIGTERM, &sa, NULL);
sa.sa_handler = sighup;
sigaction(SIGHUP, &sa, NULL);
set_tty_parameters();
sa.sa_handler = sigalrm;
sigaction(SIGALRM, &sa, NULL);
alarm(0);
alarmed = 0;
}
void set_tty_parameters(void)
{
#if defined(get_term_param)
term_parms t;
if (get_term_param (&t) < 0)
fatal(2, "Can't get terminal parameters: %m");
saved_tty_parameters = t;
have_tty_parameters = 1;
t.c_iflag |= IGNBRK | ISTRIP | IGNPAR;
t.c_oflag = 0;
t.c_lflag = 0;
t.c_cc[VERASE] =
t.c_cc[VKILL] = 0;
t.c_cc[VMIN] = 1;
t.c_cc[VTIME] = 0;
if (set_term_param (&t) < 0)
fatal(2, "Can't set terminal parameters: %m");
#endif
}
void break_sequence(void)
{
#ifdef TERMIOS
tcsendbreak (0, 0);
#endif
}
void terminate(int status)
{
static int terminating = 0;
if (terminating)
exit(status);
terminating = 1;
echo_stderr(-1);
/*
* Allow the last of the report string to be gathered before we terminate.
*/
if (report_gathering) {
int c, rep_len;
rep_len = strlen(report_buffer);
while (rep_len + 1 < sizeof(report_buffer)) {
alarm(1);
c = get_char();
alarm(0);
if (c < 0 || iscntrl(c))
break;
report_buffer[rep_len] = c;
++rep_len;
}
report_buffer[rep_len] = 0;
fprintf (report_fp, "chat: %s\n", report_buffer);
}
if (report_file != (char *) 0 && report_fp != (FILE *) NULL) {
if (verbose)
fprintf (report_fp, "Closing \"%s\".\n", report_file);
fclose (report_fp);
report_fp = (FILE *) NULL;
}
#if defined(get_term_param)
if (have_tty_parameters) {
if (set_term_param (&saved_tty_parameters) < 0)
fatal(2, "Can't restore terminal parameters: %m");
}
#endif
exit(status);
}
/*
* 'Clean up' this string.
*/
char *clean(register char *s,
int sending) /* set to 1 when sending (putting) this string. */
{
char cur_chr;
char *s1, *p, *phchar;
int add_return = sending;
size_t len = strlen(s) + 3; /* see len comments below */
#define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
#define isalnumx(chr) ((((chr) >= '0') && ((chr) <= '9')) \
|| (((chr) >= 'a') && ((chr) <= 'z')) \
|| (((chr) >= 'A') && ((chr) <= 'Z')) \
|| (chr) == '_')
p = s1 = malloc(len);
if (!p)
fatal(2, "memory error!");
while (*s) {
cur_chr = *s++;
if (cur_chr == '^') {
cur_chr = *s++;
if (cur_chr == '\0') {
*p++ = '^';
break;
}
cur_chr &= 0x1F;
if (cur_chr != 0) {
*p++ = cur_chr;
}
continue;
}
if (use_env && cur_chr == '$') { /* ARI */
char c;
phchar = s;
while (isalnumx(*s))
s++;
c = *s; /* save */
*s = '\0';
phchar = getenv(phchar);
*s = c; /* restore */
if (phchar) {
len += strlen(phchar);
s1 = grow(s1, &p, len);
while (*phchar)
*p++ = *phchar++;
}
continue;
}
if (cur_chr != '\\') {
*p++ = cur_chr;
continue;
}
cur_chr = *s++;
if (cur_chr == '\0') {
if (sending) {
*p++ = '\\';
*p++ = '\\'; /* +1 for len */
}
break;
}
switch (cur_chr) {
case 'b':
*p++ = '\b';
break;
case 'c':
if (sending && *s == '\0')
add_return = 0;
else
*p++ = cur_chr;
break;
case '\\':
case 'K':
case 'p':
case 'd':
if (sending)
*p++ = '\\';
*p++ = cur_chr;
break;
case 'T':
if (sending && phone_num) {
len += strlen(phone_num);
s1 = grow(s1, &p, len);
for (phchar = phone_num; *phchar != '\0'; phchar++)
*p++ = *phchar;
}
else {
*p++ = '\\';
*p++ = 'T';
}
break;
case 'U':
if (sending && phone_num2) {
len += strlen(phone_num2);
s1 = grow(s1, &p, len);
for (phchar = phone_num2; *phchar != '\0'; phchar++)
*p++ = *phchar;
}
else {
*p++ = '\\';
*p++ = 'U';
}
break;
case 'q':
quiet = 1;
break;
case 'r':
*p++ = '\r';
break;
case 'n':
*p++ = '\n';
break;
case 's':
*p++ = ' ';
break;
case 't':
*p++ = '\t';
break;
case 'N':
if (sending) {
*p++ = '\\';
*p++ = '\0';
}
else
*p++ = 'N';
break;
case '$': /* ARI */
if (use_env) {
*p++ = cur_chr;
break;
}
/* FALL THROUGH */
default:
if (isoctal (cur_chr)) {
cur_chr &= 0x07;
if (isoctal (*s)) {
cur_chr <<= 3;
cur_chr |= *s++ - '0';
if (isoctal (*s)) {
cur_chr <<= 3;
cur_chr |= *s++ - '0';
}
}
if (cur_chr != 0 || sending) {
if (sending && (cur_chr == '\\' || cur_chr == 0))
*p++ = '\\';
*p++ = cur_chr;
}
break;
}
if (sending)
*p++ = '\\';
*p++ = cur_chr;
break;
}
}
if (add_return)
*p++ = '\r'; /* +2 for len */
*p = '\0'; /* +3 for len */
return s1;
}
/*
* A modified version of 'strtok'. This version skips \ sequences.
*/
char *expect_strtok (char *s, char *term)
{
static char *str = "";
int escape_flag = 0;
char *result;
/*
* If a string was specified then do initial processing.
*/
if (s)
str = s;
/*
* If this is the escape flag then reset it and ignore the character.
*/
if (*str)
result = str;
else
result = (char *) 0;
while (*str) {
if (escape_flag) {
escape_flag = 0;
++str;
continue;
}
if (*str == '\\') {
++str;
escape_flag = 1;
continue;
}
/*
* If this is not in the termination string, continue.
*/
if (strchr (term, *str) == (char *) 0) {
++str;
continue;
}
/*
* This is the terminator. Mark the end of the string and stop.
*/
*str++ = '\0';
break;
}
return (result);
}
/*
* Process the expect string
*/
void chat_expect (char *s)
{
char *expect;
char *reply;
if (strcmp(s, "HANGUP") == 0) {
++hup_next;
return;
}
if (strcmp(s, "ABORT") == 0) {
++abort_next;
return;
}
if (strcmp(s, "CLR_ABORT") == 0) {
++clear_abort_next;
return;
}
if (strcmp(s, "REPORT") == 0) {
++report_next;
return;
}
if (strcmp(s, "CLR_REPORT") == 0) {
++clear_report_next;
return;
}
if (strcmp(s, "TIMEOUT") == 0) {
++timeout_next;
return;
}
if (strcmp(s, "ECHO") == 0) {
++echo_next;
return;
}
if (strcmp(s, "SAY") == 0) {
++say_next;
return;
}
/*
* Fetch the expect and reply string.
*/
for (;;) {
expect = expect_strtok (s, "-");
s = (char *) 0;
if (expect == (char *) 0)
return;
reply = expect_strtok (s, "-");
/*
* Handle the expect string. If successful then exit.
*/
if (get_string (expect))
return;
/*
* If there is a sub-reply string then send it. Otherwise any condition
* is terminal.
*/
if (reply == (char *) 0 || exit_code != 3)
break;
chat_send (reply);
checksigs();
}
/*
* The expectation did not occur. This is terminal.
*/
if (fail_reason)
msgf("Failed (%s)", fail_reason);
else
msgf("Failed");
terminate(exit_code);
}
/*
* Translate the input character to the appropriate string for printing
* the data.
*/
char *character(int c)
{
static char string[10];
char *meta;
meta = (c & 0x80) ? "M-" : "";
c &= 0x7F;
if (c < 32)
sprintf(string, "%s^%c", meta, (int)c + '@');
else if (c == 127)
sprintf(string, "%s^?", meta);
else
sprintf(string, "%s%c", meta, c);
return (string);
}
/*
* process the reply string
*/
int chat_send (register char *s)
{
char file_data[STR_LEN];
int len, ret = 0;
struct sigaction sa;
if (say_next) {
say_next = 0;
s = clean(s, 1);
len = strlen(s);
ret = write(2, s, len) != len;
free(s);
return ret;
}
if (hup_next) {
hup_next = 0;
memset(&sa, 0, sizeof(sa));
if (strcmp(s, "OFF") == 0)
sa.sa_handler = SIG_IGN;
else
sa.sa_handler = sighup;
sigaction(SIGHUP, &sa, NULL);
return 0;
}
if (echo_next) {
echo_next = 0;
echo = (strcmp(s, "ON") == 0);
return 0;
}
if (abort_next) {
char *s1;
abort_next = 0;
if (n_aborts >= MAX_ABORTS)
fatal(2, "Too many ABORT strings");
s1 = clean(s, 0);
if (strlen(s1) + 1 > sizeof(fail_buffer))
fatal(1, "Illegal or too-long ABORT string ('%v')", s);
abort_string[n_aborts++] = s1;
if (verbose)
msgf("abort on (%v)", s1);
return 0;
}
if (clear_abort_next) {
char *s1;
int i;
int old_max;
int pack = 0;
clear_abort_next = 0;
s1 = clean(s, 0);
if (strlen(s1) + 1 > sizeof(fail_buffer))
fatal(1, "Illegal or too-long CLR_ABORT string ('%v')", s);
old_max = n_aborts;
for (i=0; i < n_aborts; i++) {
if ( strcmp(s1,abort_string[i]) == 0 ) {
free(abort_string[i]);
abort_string[i] = NULL;
pack++;
n_aborts--;
if (verbose)
msgf("clear abort on (%v)", s1);
}
}
free(s1);
if (pack)
pack_array(abort_string,old_max);
return 0;
}
if (report_next) {
char *s1;
report_next = 0;
if (n_reports >= MAX_REPORTS)
fatal(2, "Too many REPORT strings");
s1 = clean(s, 0);
if (strlen(s1) + 1 > sizeof(fail_buffer))
fatal(1, "Illegal or too-long REPORT string ('%v')", s);
report_string[n_reports++] = s1;
if (verbose)
msgf("report (%v)", s1);
return 0;
}
if (clear_report_next) {
char *s1;
int i;
int old_max;
int pack = 0;
clear_report_next = 0;
s1 = clean(s, 0);
if (strlen(s1) + 1 > sizeof(fail_buffer))
fatal(1, "Illegal or too-long REPORT string ('%v')", s);
old_max = n_reports;
for (i=0; i < n_reports; i++) {
if ( strcmp(s1,report_string[i]) == 0 ) {
free(report_string[i]);
report_string[i] = NULL;
pack++;
n_reports--;
if (verbose)
msgf("clear report (%v)", s1);
}
}
free(s1);
if (pack)
pack_array(report_string,old_max);
return 0;
}
if (timeout_next) {
timeout_next = 0;
s = clean(s, 0);
timeout = atoi(s);
if (timeout <= 0)
timeout = DEFAULT_CHAT_TIMEOUT;
if (verbose)
msgf("timeout set to %d seconds", timeout);
free(s);
return 0;
}
/*
* The syntax @filename means read the string to send from the
* file `filename'.
*/
if (s[0] == '@') {
/* skip the @ and any following white-space */
char *fn = s;
while (*++fn == ' ' || *fn == '\t')
;
if (*fn != 0) {
FILE *f;
int n = 0;
/* open the file and read until STR_LEN-1 bytes or end-of-file */
f = fopen(fn, "r");
if (f == NULL)
fatal(1, "%s -- open failed: %m", fn);
while (n < STR_LEN - 1) {
int nr = fread(&file_data[n], 1, STR_LEN - 1 - n, f);
if (nr < 0)
fatal(1, "%s -- read error", fn);
if (nr == 0)
break;
n += nr;
}
fclose(f);
/* use the string we got as the string to send,
but trim off the final newline if any. */
if (n > 0 && file_data[n-1] == '\n')
--n;
file_data[n] = 0;
s = file_data;
}
}
if (strcmp(s, "EOT") == 0)
s = "^D\\c";
else if (strcmp(s, "BREAK") == 0)
s = "\\K\\c";
if (!put_string(s))
fatal(1, "Failed");
return 0;
}
int get_char(void)
{
int status;
char c;
status = read(0, &c, 1);
checksigs();
switch (status) {
case 1:
return ((int)c & 0x7F);
default:
msgf("warning: read() on stdin returned %d", status);
case -1:
return (-1);
}
}
int put_char(int c)
{
int status;
char ch = c;
usleep(10000); /* inter-character typing delay (?) */
checksigs();
status = write(1, &ch, 1);
checksigs();
switch (status) {
case 1:
return (0);
default:
msgf("warning: write() on stdout returned %d", status);
case -1:
return (-1);
}
}
int write_char(int c)
{
if (alarmed || put_char(c) < 0) {
alarm(0);
alarmed = 0;
if (verbose) {
if (errno == EINTR || errno == EWOULDBLOCK)
msgf(" -- write timed out");
else
msgf(" -- write failed: %m");
}
return (0);
}
return (1);
}
int put_string(register char *s)
{
char *s1;
quiet = 0;
s = clean(s, 1);
s1 = s;
if (verbose) {
if (quiet)
msgf("send (?????\?)");
else
msgf("send (%v)", s);
}
alarm(timeout); alarmed = 0;
while (*s) {
register char c = *s++;
if (c != '\\') {
if (!write_char (c)) {
free(s1);
return 0;
}
continue;
}
c = *s++;
switch (c) {
case 'd':
sleep(1);
break;
case 'K':
break_sequence();
break;
case 'p':
usleep(10000); /* 1/100th of a second (arg is microseconds) */
break;
default:
if (!write_char (c)) {
free(s1);
return 0;
}
break;
}
checksigs();
}
alarm(0);
alarmed = 0;
free(s1);
return (1);
}
/*
* Echo a character to stderr.
* When called with -1, a '\n' character is generated when
* the cursor is not at the beginning of a line.
*/
int echo_stderr(int n)
{
static int need_lf;
char *s;
int len, ret = 0;
switch (n) {
case '\r': /* ignore '\r' */
break;
case -1:
if (need_lf == 0)
break;
/* fall through */
case '\n':
ret = write(2, "\n", 1) != 1;
need_lf = 0;
break;
default:
s = character(n);
len = strlen(s);
ret = write(2, s, len) != len;
need_lf = 1;
break;
}
checksigs();
return ret;
}
/*
* 'Wait for' this string to appear on this file descriptor.
*/
int get_string(register char *string)
{
char temp[STR_LEN];
int c, printed = 0, len, minlen;
register char *s = temp, *end = s + STR_LEN;
char *s1, *logged = temp;
fail_reason = (char *)0;
string = s1 = clean(string, 0);
len = strlen(string);
minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
if (verbose)
msgf("expect (%v)", string);
if (len > STR_LEN) {
msgf("expect string is too long");
exit_code = 1;
free(s1);
return 0;
}
if (len == 0) {
if (verbose)
msgf("got it");
free(s1);
return (1);
}
alarm(timeout);
alarmed = 0;
while ( ! alarmed && (c = get_char()) >= 0) {
int n, abort_len, report_len;
if (echo) {
if (echo_stderr(c) != 0) {
fatal(2, "Could not write to stderr, %m");
}
}
if (verbose && c == '\n') {
if (s == logged)
msgf(""); /* blank line */
else
msgf("%0.*v", s - logged, logged);
logged = s + 1;
}
*s++ = c;
if (verbose && s >= logged + 80) {
msgf("%0.*v", s - logged, logged);
logged = s;
}
if (Verbose) {
if (c == '\n')
fputc( '\n', stderr );
else if (c != '\r')
fprintf( stderr, "%s", character(c) );
}
if (!report_gathering) {
for (n = 0; n < n_reports; ++n) {
if ((report_string[n] != (char*) NULL) &&
s - temp >= (report_len = strlen(report_string[n])) &&
strncmp(s - report_len, report_string[n], report_len) == 0) {
time_t time_now = time ((time_t*) NULL);
struct tm* tm_now = localtime (&time_now);
strftime (report_buffer, 20, "%b %d %H:%M:%S ", tm_now);
strcat (report_buffer, report_string[n]);
free(report_string[n]);
report_string[n] = (char *) NULL;
report_gathering = 1;
break;
}
}
}
else {
if (!iscntrl (c)) {
int rep_len = strlen (report_buffer);
if ((rep_len + 1) < sizeof(report_buffer)) {
report_buffer[rep_len] = c;
report_buffer[rep_len + 1] = '\0';
}
}
else {
report_gathering = 0;
fprintf (report_fp, "chat: %s\n", report_buffer);
}
}
if (s - temp >= len &&
c == string[len - 1] &&
strncmp(s - len, string, len) == 0) {
if (verbose) {
if (s > logged)
msgf("%0.*v", s - logged, logged);
msgf(" -- got it\n");
}
alarm(0);
alarmed = 0;
free(s1);
return (1);
}
for (n = 0; n < n_aborts; ++n) {
if (s - temp >= (abort_len = strlen(abort_string[n])) &&
strncmp(s - abort_len, abort_string[n], abort_len) == 0) {
if (verbose) {
if (s > logged)
msgf("%0.*v", s - logged, logged);
msgf(" -- failed");
}
alarm(0);
alarmed = 0;
exit_code = n + 4;
strcpy(fail_reason = fail_buffer, abort_string[n]);
free(s1);
return (0);
}
}
if (s >= end) {
if (logged < s - minlen) {
if (verbose)
msgf("%0.*v", s - logged, logged);
logged = s;
}
s -= minlen;
memmove(temp, s, minlen);
logged = temp + (logged - s);
s = temp + minlen;
}
if (alarmed && verbose)
msgf("warning: alarm synchronization problem");
}
alarm(0);
if (verbose && printed) {
if (alarmed)
msgf(" -- read timed out");
else
msgf(" -- read failed: %m");
}
exit_code = 3;
alarmed = 0;
free(s1);
return (0);
}
/*
* Gross kludge to handle Solaris versions >= 2.6 having usleep.
*/
#ifdef SOL2
#include <sys/param.h>
#if MAXUID > 65536 /* then this is Solaris 2.6 or later */
#undef NO_USLEEP
#endif
#endif /* SOL2 */
#ifdef NO_USLEEP
#include <sys/types.h>
#include <sys/time.h>
/*
usleep -- support routine for 4.2BSD system call emulations
last edit: 29-Oct-1984 D A Gwyn
*/
extern int select();
/* returns 0 if ok, else -1 */
int usleep(long usec) /* delay in microseconds */
{
static struct { /* `timeval' */
long tv_sec; /* seconds */
long tv_usec; /* microsecs */
} delay; /* _select() timeout */
delay.tv_sec = usec / 1000000L;
delay.tv_usec = usec % 1000000L;
return select(0, (long *)0, (long *)0, (long *)0, &delay);
}
#endif
void pack_array (
char **array, /* The address of the array of string pointers */
int end) /* The index of the next free entry before CLR_ */
{
int i, j;
for (i = 0; i < end; i++) {
if (array[i] == NULL) {
for (j = i+1; j < end; ++j)
if (array[j] != NULL)
array[i++] = array[j];
for (; i < end; ++i)
array[i] = NULL;
break;
}
}
}
/*
* vfmtmsg - format a message into a buffer. Like vsprintf except we
* also specify the length of the output buffer, and we handle the
* %m (error message) format.
* Doesn't do floating-point formats.
* Returns the number of chars put into buf.
*/
#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
int
vfmtmsg(char *buf, int buflen, const char *fmt, va_list args)
{
int c, i, n;
int width, prec, fillch;
int base, len, neg, quoted;
unsigned long val = 0;
char *str, *buf0;
const char *f;
unsigned char *p;
char num[32];
static char hexchars[] = "0123456789abcdef";
buf0 = buf;
--buflen;
while (buflen > 0) {
for (f = fmt; *f != '%' && *f != 0; ++f)
;
if (f > fmt) {
len = f - fmt;
if (len > buflen)
len = buflen;
memcpy(buf, fmt, len);
buf += len;
buflen -= len;
fmt = f;
}
if (*fmt == 0)
break;
c = *++fmt;
width = prec = 0;
fillch = ' ';
if (c == '0') {
fillch = '0';
c = *++fmt;
}
if (c == '*') {
width = va_arg(args, int);
c = *++fmt;
} else {
while (isdigit(c)) {
width = width * 10 + c - '0';
c = *++fmt;
}
}
if (c == '.') {
c = *++fmt;
if (c == '*') {
prec = va_arg(args, int);
c = *++fmt;
} else {
while (isdigit(c)) {
prec = prec * 10 + c - '0';
c = *++fmt;
}
}
}
str = 0;
base = 0;
neg = 0;
++fmt;
switch (c) {
case 'd':
i = va_arg(args, int);
if (i < 0) {
neg = 1;
val = -i;
} else
val = i;
base = 10;
break;
case 'o':
val = va_arg(args, unsigned int);
base = 8;
break;
case 'x':
val = va_arg(args, unsigned int);
base = 16;
break;
case 'p':
val = (unsigned long) va_arg(args, void *);
base = 16;
neg = 2;
break;
case 's':
str = va_arg(args, char *);
break;
case 'c':
num[0] = va_arg(args, int);
num[1] = 0;
str = num;
break;
case 'm':
str = strerror(errno);
break;
case 'v': /* "visible" string */
case 'q': /* quoted string */
quoted = c == 'q';
p = va_arg(args, unsigned char *);
if (fillch == '0' && prec > 0) {
n = prec;
} else {
n = strlen((char *)p);
if (prec > 0 && prec < n)
n = prec;
}
while (n > 0 && buflen > 0) {
c = *p++;
--n;
if (!quoted && c >= 0x80) {
OUTCHAR('M');
OUTCHAR('-');
c -= 0x80;
}
if (quoted && (c == '"' || c == '\\'))
OUTCHAR('\\');
if (c < 0x20 || (0x7f <= c && c < 0xa0)) {
if (quoted) {
OUTCHAR('\\');
switch (c) {
case '\t': OUTCHAR('t'); break;
case '\n': OUTCHAR('n'); break;
case '\b': OUTCHAR('b'); break;
case '\f': OUTCHAR('f'); break;
default:
OUTCHAR('x');
OUTCHAR(hexchars[c >> 4]);
OUTCHAR(hexchars[c & 0xf]);
}
} else {
if (c == '\t')
OUTCHAR(c);
else {
OUTCHAR('^');
OUTCHAR(c ^ 0x40);
}
}
} else
OUTCHAR(c);
}
continue;
default:
*buf++ = '%';
if (c != '%')
--fmt; /* so %z outputs %z etc. */
--buflen;
continue;
}
if (base != 0) {
str = num + sizeof(num);
*--str = 0;
while (str > num + neg) {
*--str = hexchars[val % base];
val = val / base;
if (--prec <= 0 && val == 0)
break;
}
switch (neg) {
case 1:
*--str = '-';
break;
case 2:
*--str = 'x';
*--str = '0';
break;
}
len = num + sizeof(num) - 1 - str;
} else {
len = strlen(str);
if (prec > 0 && len > prec)
len = prec;
}
if (width > 0) {
if (width > buflen)
width = buflen;
if ((n = width - len) > 0) {
buflen -= n;
for (; n > 0; --n)
*buf++ = fillch;
}
}
if (len > buflen)
len = buflen;
memcpy(buf, str, len);
buf += len;
buflen -= len;
}
*buf = 0;
return buf - buf0;
}
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