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freebsd/usr.bin/chat/chat.c
Xin LI 18ebe77959 Merge revisions 1.10 and 1.11 from DragonFly: 
- Use real getopt() handling instead of the hand-rolled and
   IOCCC-worthy "Micro getopt()" macros, plus clean up to the
   option handling code:
    * Sort the options in the switch statement;
    * Plug piddling memory leaks when processing repeated options
      by freeing strings before allocating them for a second time;
    * Die with a fatal error if the requested report file cannot
      be opened for appending;
    * Don't call init() before usage() (to prevent the usage
      message being mangled by changes to the terminal settings;)
 - Clean up the usage message, both in usage() and in the main
   program comment, both stylistically (sort and combine options)
   and for accuracy (following the manual page, make note of the -s
   and -S flags, and use the term 'send' instead of 'say' to reduce
   confusion (SAY is the name of a command for output to the user,
   not the connection.))

Obtained from:	DragonFly
2008-03-07 00:01:19 +00:00

1536 lines
29 KiB
C
Raw Blame History

/*
* Chat -- a program for automatic session establishment (i.e. dial
* the phone and log in).
*
* 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.
*
* This software is in the public domain.
*
* -----------------
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#define STR_LEN 1024
#ifndef SIGTYPE
#define SIGTYPE void
#endif
#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
#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 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;
static char blank[] = "";
int have_tty_parameters = 0;
#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;
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[50] ;
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);
static void usage(void);
void chat_logf(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 init(void);
void set_tty_parameters(void);
void echo_stderr(int);
void break_sequence(void);
void terminate(int status);
void do_file(char *chatfile);
int get_string(char *string);
int put_string(char *s);
int write_char(int c);
int put_char(int c);
int get_char(void);
void chat_send(char *s);
char *character(int c);
void chat_expect(char *s);
char *clean(char *s, int sending);
void pack_array(char **array, int end);
char *expect_strtok(char *, const char *);
int vfmtmsg(char *, int, const char *, va_list); /* vsprintf++ */
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);
}
/*
* chat [-esSvV] [-f chat-file] [-r report-file] [-t timeout]
* [-T phone-number] [-U phone-number2] [chat-script]
* where chat-script has the form:
* [...[[expect[-send[-expect...]] send expect[-send[-expect]] ...]]]
*
* Perform a UUCP-dialer-like chat script on stdin and stdout.
*/
int
main(int argc, char *argv[])
{
int option;
tzset();
while ((option = getopt(argc, argv, "ef:r:sSt:T:U:vV")) != -1) {
switch (option) {
case 'e':
++echo;
break;
case 'f':
if (chat_file != NULL)
free(chat_file);
chat_file = copy_of(optarg);
break;
case 'r':
if (report_fp != NULL)
fclose(report_fp);
if (report_file != NULL)
free(report_file);
report_file = copy_of(optarg);
report_fp = fopen(report_file, "a");
if (report_fp != NULL) {
if (verbose)
fprintf(report_fp, "Opening \"%s\"...\n", report_file);
} else
fatal(2, "cannot open \"%s\" for appending", report_file);
break;
case 's':
++to_stderr;
break;
case 'S':
to_log = 0;
break;
case 't':
timeout = atoi(optarg);
break;
case 'T':
if (phone_num != NULL)
free(phone_num);
phone_num = copy_of(optarg);
break;
case 'U':
if (phone_num2 != NULL)
free(phone_num2);
phone_num2 = copy_of(optarg);
break;
case 'v':
++verbose;
break;
case 'V':
++Verbose;
break;
default:
usage();
break;
}
}
argc -= optind;
argv += optind;
/*
* 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));
}
if (chat_file != NULL) {
if (*argv != NULL)
usage();
else {
init();
do_file(chat_file);
}
} else {
init();
while (*argv != NULL && argc > 0) {
chat_expect(*argv);
argv++;
argc--;
if (*argv != NULL && argc > 0) {
chat_send(*argv);
argv++;
argc--;
}
}
}
terminate(0);
return 0;
}
/*
* Process a chat script when read from a file.
*/
void
do_file(char *chatfile)
{
int linect, sendflg;
char *sp, *arg, quote;
char buf [STR_LEN];
FILE *cfp;
cfp = fopen (chatfile, "r");
if (cfp == NULL)
fatal(1, "%s -- open failed: %m", chatfile);
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;
}
}
fclose (cfp);
}
/*
* We got an error parsing the command line.
*/
static void
usage(void)
{
fprintf(stderr,
"Usage: chat [-esSvV] [-f chat-file] [-r report-file] [-t timeout]\n"
" [-T phone-number] [-U phone-number2] [chat-script]\n"
"where chat-script has the form:\n"
" [...[[expect[-send[-expect...]] send expect[-send[-expect]] ...]]]\n");
exit(1);
}
char line[1024];
/*
* Send a message to syslog and/or stderr.
*/
void
chat_logf(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);
}
/*
* 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);
terminate(code);
}
int alarmed = 0;
SIGTYPE sigalrm(int signo __unused)
{
int flags;
alarm(1);
alarmed = 1; /* Reset alarm to avoid race window */
signal(SIGALRM, sigalrm); /* that can cause hanging in read() */
if ((flags = fcntl(0, F_GETFL, 0)) == -1)
fatal(2, "Can't get file mode flags on stdin: %m");
if (fcntl(0, F_SETFL, flags | O_NONBLOCK) == -1)
fatal(2, "Can't set file mode flags on stdin: %m");
if (verbose)
chat_logf("alarm");
}
SIGTYPE sigint(int signo __unused)
{
fatal(2, "SIGINT");
}
SIGTYPE sigterm(int signo __unused)
{
fatal(2, "SIGTERM");
}
SIGTYPE sighup(int signo __unused)
{
fatal(2, "SIGHUP");
}
void init(void)
{
signal(SIGINT, sigint);
signal(SIGTERM, sigterm);
signal(SIGHUP, sighup);
set_tty_parameters();
signal(SIGALRM, sigalrm);
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)
{
tcsendbreak (0, 0);
}
void terminate(int status)
{
echo_stderr(-1);
if (report_file != (char *) 0 && report_fp != (FILE *) NULL) {
/*
* Allow the last of the report string to be gathered before we terminate.
*/
if (report_gathering) {
int c;
size_t 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 (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(char *s, int sending)
{
char temp[STR_LEN], cur_chr;
char *s1, *phchar;
int add_return = sending;
#define isoctal(chr) (((chr) >= '0') && ((chr) <= '7'))
s1 = temp;
/* Don't overflow buffer, leave room for chars we append later */
while (*s && s1 - temp < (off_t)(sizeof(temp) - 2 - add_return)) {
cur_chr = *s++;
if (cur_chr == '^') {
cur_chr = *s++;
if (cur_chr == '\0') {
*s1++ = '^';
break;
}
cur_chr &= 0x1F;
if (cur_chr != 0) {
*s1++ = cur_chr;
}
continue;
}
if (cur_chr != '\\') {
*s1++ = cur_chr;
continue;
}
cur_chr = *s++;
if (cur_chr == '\0') {
if (sending) {
*s1++ = '\\';
*s1++ = '\\';
}
break;
}
switch (cur_chr) {
case 'b':
*s1++ = '\b';
break;
case 'c':
if (sending && *s == '\0')
add_return = 0;
else
*s1++ = cur_chr;
break;
case '\\':
case 'K':
case 'p':
case 'd':
if (sending)
*s1++ = '\\';
*s1++ = cur_chr;
break;
case 'T':
if (sending && phone_num) {
for ( phchar = phone_num; *phchar != '\0'; phchar++)
*s1++ = *phchar;
}
else {
*s1++ = '\\';
*s1++ = 'T';
}
break;
case 'U':
if (sending && phone_num2) {
for ( phchar = phone_num2; *phchar != '\0'; phchar++)
*s1++ = *phchar;
}
else {
*s1++ = '\\';
*s1++ = 'U';
}
break;
case 'q':
quiet = 1;
break;
case 'r':
*s1++ = '\r';
break;
case 'n':
*s1++ = '\n';
break;
case 's':
*s1++ = ' ';
break;
case 't':
*s1++ = '\t';
break;
case 'N':
if (sending) {
*s1++ = '\\';
*s1++ = '\0';
}
else
*s1++ = 'N';
break;
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))
*s1++ = '\\';
*s1++ = cur_chr;
}
break;
}
if (sending)
*s1++ = '\\';
*s1++ = cur_chr;
break;
}
}
if (add_return)
*s1++ = '\r';
*s1++ = '\0'; /* guarantee closure */
*s1++ = '\0'; /* terminate the string */
return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */
}
/*
* A modified version of 'strtok'. This version skips \ sequences.
*/
char *
expect_strtok (char *s, const char *term)
{
static char *str = blank;
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);
}
/*
* The expectation did not occur. This is terminal.
*/
if (fail_reason)
chat_logf("Failed (%s)", fail_reason);
else
chat_logf("Failed");
terminate(exit_code);
}
/*
* Translate the input character to the appropriate string for printing
* the data.
*/
char *
character(int c)
{
static char string[10];
const 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
*/
void
chat_send(char *s)
{
if (say_next) {
say_next = 0;
s = clean(s,0);
write(STDERR_FILENO, s, strlen(s));
free(s);
return;
}
if (hup_next) {
hup_next = 0;
if (strcmp(s, "OFF") == 0)
signal(SIGHUP, SIG_IGN);
else
signal(SIGHUP, sighup);
return;
}
if (echo_next) {
echo_next = 0;
echo = (strcmp(s, "ON") == 0);
return;
}
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) > strlen(s)
|| strlen(s1) + 1 > sizeof(fail_buffer))
fatal(1, "Illegal or too-long ABORT string ('%v')", s);
abort_string[n_aborts++] = s1;
if (verbose)
chat_logf("abort on (%v)", s);
return;
}
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) > strlen(s)
|| 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)
chat_logf("clear abort on (%v)", s);
}
}
free(s1);
if (pack)
pack_array(abort_string,old_max);
return;
}
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) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
fatal(1, "Illegal or too-long REPORT string ('%v')", s);
report_string[n_reports++] = s1;
if (verbose)
chat_logf("report (%v)", s);
return;
}
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) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
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)
chat_logf("clear report (%v)", s);
}
}
free(s1);
if (pack)
pack_array(report_string,old_max);
return;
}
if (timeout_next) {
timeout_next = 0;
timeout = atoi(s);
if (timeout <= 0)
timeout = DEFAULT_CHAT_TIMEOUT;
if (verbose)
chat_logf("timeout set to %d seconds", timeout);
return;
}
if (strcmp(s, "EOT") == 0)
s = strdup("^D\\c");
else if (strcmp(s, "BREAK") == 0)
s = strdup("\\K\\c");
if (!put_string(s))
fatal(1, "Failed");
}
int
get_char(void)
{
int status;
char c;
status = read(STDIN_FILENO, &c, 1);
switch (status) {
case 1:
return ((int)c & 0x7F);
default:
chat_logf("warning: read() on stdin returned %d", status);
case -1:
if ((status = fcntl(0, F_GETFL, 0)) == -1)
fatal(2, "Can't get file mode flags on stdin: %m");
if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1)
fatal(2, "Can't set file mode flags on stdin: %m");
return (-1);
}
}
int put_char(int c)
{
int status;
char ch = c;
usleep(10000); /* inter-character typing delay (?) */
status = write(STDOUT_FILENO, &ch, 1);
switch (status) {
case 1:
return (0);
default:
chat_logf("warning: write() on stdout returned %d", status);
case -1:
if ((status = fcntl(0, F_GETFL, 0)) == -1)
fatal(2, "Can't get file mode flags on stdin, %m");
if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1)
fatal(2, "Can't set file mode flags on stdin: %m");
return (-1);
}
}
int
write_char(int c)
{
if (alarmed || put_char(c) < 0) {
alarm(0);
alarmed = 0;
if (verbose) {
if (errno == EINTR || errno == EWOULDBLOCK)
chat_logf(" -- write timed out");
else
chat_logf(" -- write failed: %m");
}
return (0);
}
return (1);
}
int
put_string(char *s)
{
quiet = 0;
s = clean(s, 1);
if (verbose)
chat_logf("send (%v)", quiet ? "??????" : s);
alarm(timeout); alarmed = 0;
while (*s) {
char c = *s++;
if (c != '\\') {
if (!write_char (c))
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))
return 0;
break;
}
}
alarm(0);
alarmed = 0;
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.
*/
void
echo_stderr(int n)
{
static int need_lf;
char *s;
switch (n) {
case '\r': /* ignore '\r' */
break;
case -1:
if (need_lf == 0)
break;
/* FALLTHROUGH */
case '\n':
write(STDERR_FILENO, "\n", 1);
need_lf = 0;
break;
default:
s = character(n);
write(STDERR_FILENO, s, strlen(s));
need_lf = 1;
break;
}
}
/*
* 'Wait for' this string to appear on this file descriptor.
*/
int
get_string(char *string)
{
char temp[STR_LEN];
int c, printed = 0;
size_t len, minlen;
char *s = temp, *end = s + STR_LEN;
char *logged = temp;
fail_reason = (char *)0;
if (strlen(string) > STR_LEN) {
chat_logf("expect string is too long");
exit_code = 1;
return 0;
}
string = clean(string, 0);
len = strlen(string);
minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
if (verbose)
chat_logf("expect (%v)", string);
if (len == 0) {
if (verbose)
chat_logf("got it");
return (1);
}
alarm(timeout);
alarmed = 0;
while ( ! alarmed && (c = get_char()) >= 0) {
int n, abort_len, report_len;
if (echo)
echo_stderr(c);
if (verbose && c == '\n') {
if (s == logged)
chat_logf(""); /* blank line */
else
chat_logf("%0.*v", s - logged, logged);
logged = s + 1;
}
*s++ = c;
if (verbose && s >= logged + 80) {
chat_logf("%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]);
report_string[n] = (char *) NULL;
report_gathering = 1;
break;
}
}
}
else {
if (!iscntrl (c)) {
int rep_len = strlen (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 ((size_t)(s - temp) >= len &&
c == string[len - 1] &&
strncmp(s - len, string, len) == 0) {
if (verbose) {
if (s > logged)
chat_logf("%0.*v", s - logged, logged);
chat_logf(" -- got it\n");
}
alarm(0);
alarmed = 0;
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)
chat_logf("%0.*v", s - logged, logged);
chat_logf(" -- failed");
}
alarm(0);
alarmed = 0;
exit_code = n + 4;
strcpy(fail_reason = fail_buffer, abort_string[n]);
return (0);
}
}
if (s >= end) {
if (logged < s - minlen) {
chat_logf("%0.*v", s - logged, logged);
logged = s;
}
s -= minlen;
memmove(temp, s, minlen);
logged = temp + (logged - s);
s = temp + minlen;
}
if (alarmed && verbose)
chat_logf("warning: alarm synchronization problem");
}
alarm(0);
if (verbose && printed) {
if (alarmed)
chat_logf(" -- read timed out");
else
chat_logf(" -- read failed: %m");
}
exit_code = 3;
alarmed = 0;
return (0);
}
void
pack_array(char **array, int end)
{
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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