* Copyright (c) 2005 The NetBSD Foundation, Inc.

/* $NetBSD: sti.c,v 1.8 2009/08/27 19:40:06 christos Exp $ */

/*-
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
#ifdef __RCSID
__RCSID("$NetBSD: sti.c,v 1.8 2009/08/27 19:40:06 christos Exp $");
#endif

#include <sys/param.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#include <errno.h>
#ifdef __RCSID
#include <vis.h>
#else
#define setprogname(a)
extern const char *__progname;
#define getprogname() __progname
#endif

static int
unescape(const char **pp, int *state)
{
char ch, out;

#ifdef __RCSID
while ((ch = *(*pp)++) != '\0') {
switch(unvis(&out, ch, state, 0)) {
case 0:
case UNVIS_NOCHAR:
break;
case UNVIS_VALID:
return out;
case UNVIS_VALIDPUSH:
(*pp)--;
return out;
case UNVIS_SYNBAD:
errno = EILSEQ;
return -1;
}
}
if (unvis(&out, '\0', state, UNVIS_END) == UNVIS_VALID)
return out;
#else
switch ((ch = *(*pp)++)) {
case '\0':
goto out;
case '^':
ch = *(*pp)++;
return CTRL(ch);
case '\\':
switch (ch = *(*pp)++) {
case 'a': return '\a';
case 'b': return '\b';
case 'e': return '\e';
case 'f': return '\f';
case 't': return '\t';
case 'n': return '\n';
case 'r': return '\r';
case 'v': return '\v';
case '\\': return '\\';

case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
out = 0;
if (ch >= '0' && ch < '8') {
out = out * 8 + ch - '0';
ch = *(*pp)++;
if (ch >= '0' && ch < '8') {
out = out * 8 + ch - '0';
ch = *(*pp)++;
if (ch >= '0' && ch < '8')
out = out * 8 + ch - '0';
}
}
return out;
default:
break;
}
break;
default:
return ch;
}
out:
#endif
errno = ENODATA;
return -1;
}

static void
sti(int fd, int c)
{
char ch = c;

if (ioctl(fd, TIOCSTI, &ch) == -1)
err(1, "Cannot simulate terminal input");
}

static void
sendstr(int fd, const char *str)
{
int c, state = 0;
const char *ptr = str;

while ((c = unescape(&ptr, &state)) != -1)
sti(fd, c);

if (c == -1 && errno != ENODATA)
warn("Cannot decode `%s'", str);
}

int
main(int argc, char *argv[])
{
const char *tty;
char ttydev[MAXPATHLEN];
int fd;

setprogname(*argv);

if (argc < 2) {
(void)fprintf(stderr, "Usage: %s <tty> [arg ...]\n",
getprogname());
return 1;
}

argc--;
argv++;

tty = *argv++;
argc--;

if (strncmp(tty, "/dev/", 5) == 0)
(void)snprintf(ttydev, sizeof(ttydev), "%s", tty);
else if (strncmp(tty, "tty", 3) == 0 || strncmp(tty, "pty", 3) == 0 ||
strncmp(tty, "pts/", 4) == 0)
(void)snprintf(ttydev, sizeof(ttydev), "/dev/%s", tty);
else if (isdigit((unsigned char)*tty))
(void)snprintf(ttydev, sizeof(ttydev), "/dev/pts/%s", tty);
else
(void)snprintf(ttydev, sizeof(ttydev), "/dev/tty%s", tty);

if ((fd = open(ttydev, O_RDWR)) == -1)
err(1, "Cannot open `%s'", ttydev);

if (argc == 0) {
char *line;
#ifndef __RCSID
line = malloc(10240);
while (fgets(line, 10240, stdin) != NULL) {
char *p;
if ((p = strrchr(line, '\n')) != NULL)
*p = '\0';
sendstr(fd, line);
}
free(line);
#else
while ((line = fparseln(stdin, NULL, NULL, NULL, 0)) != NULL) {
sendstr(fd, line);
free(line);
}
#endif
} else {
for (; argc--; argv++) {
sendstr(fd, *argv);
if (argc != 0)
sti(fd, ' ');
}
}

(void)close(fd);
return 0;
}