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sti.c revision 1.4 
      1 /*	$NetBSD: sti.c,v 1.4 2005/11/10 19:07:03 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2005 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 #include <sys/cdefs.h>
     39 __RCSID("$NetBSD: sti.c,v 1.4 2005/11/10 19:07:03 christos Exp $");
     40 
     41 #include <sys/param.h>
     42 #include <sys/ioctl.h>
     43 #include <ctype.h>
     44 #include <stdio.h>
     45 #include <string.h>
     46 #include <stdlib.h>
     47 #include <unistd.h>
     48 #include <fcntl.h>
     49 #include <err.h>
     50 #include <vis.h>
     51 #include <errno.h>
     52 
     53 static int
     54 unescape(const char **pp, int *state)
     55 {
     56 	char ch, out;
     57 
     58 	while ((ch = *(*pp)++) != '\0') {
     59 		switch(unvis(&out, ch, state, 0)) {
     60 		case 0:
     61 		case UNVIS_NOCHAR:
     62 		        break;
     63 		case UNVIS_VALID:
     64 			return out;
     65 		case UNVIS_VALIDPUSH:
     66 		        (*pp)--;
     67 			return out;
     68 		case UNVIS_SYNBAD:
     69 			errno = EILSEQ;
     70 			return -1;
     71 		}
     72 	}
     73 	if (unvis(&out, '\0', state, UNVIS_END) == UNVIS_VALID)
     74 		return out;
     75 	errno = ENODATA;
     76 	return -1;
     77 }
     78 
     79 static void
     80 sti(int fd, int c)
     81 {
     82 	char ch = c;
     83 
     84 	if (ioctl(fd, TIOCSTI, &ch) == -1)
     85 		err(1, "Cannot simulate terminal input");
     86 }
     87 
     88 int
     89 main(int argc, char *argv[])
     90 {
     91 	const char *tty, *ptr;
     92 	char ttydev[MAXPATHLEN];
     93 	int fd, c, state;
     94 
     95 	setprogname(*argv);
     96 
     97 	if (argc < 1) {
     98 		(void)fprintf(stderr, "Usage: %s <tty> [arg ...]\n",
     99 		    getprogname());
    100 		return 1;
    101 	}
    102 
    103 	argc--;
    104 	argv++;
    105 
    106 	tty = *argv++;
    107 	argc--;
    108 
    109 	if (strncmp(tty, "/dev/", 5) == 0)
    110 		(void)snprintf(ttydev, sizeof(ttydev), "%s", tty);
    111 	else if (strncmp(tty, "tty", 3) == 0 || strncmp(tty, "pty", 3) == 0 ||
    112 	    strncmp(tty, "pts/", 4) == 0)
    113 		(void)snprintf(ttydev, sizeof(ttydev), "/dev/%s", tty);
    114 	else if (isdigit((unsigned char)*tty))
    115 		(void)snprintf(ttydev, sizeof(ttydev), "/dev/pts/%s", tty);
    116 	else
    117 		(void)snprintf(ttydev, sizeof(ttydev), "/dev/tty%s", tty);
    118 
    119 	if ((fd = open(ttydev, O_RDWR)) == -1)
    120 		err(1, "Cannot open `%s'", ttydev);
    121 
    122 	if (argc == 0) {
    123 		char *line;
    124 		while ((line = fparseln(stdin, NULL, NULL, NULL, 0)) != NULL) {
    125 			state = 0;
    126 			for (ptr = line; (c = unescape(&ptr, &state)) != -1;)
    127 				sti(fd, c);
    128 			if (c == -1 && errno != ENODATA)
    129 				warn("Cannot decode `%s'", line);
    130 			free(line);
    131 		}
    132 		return 0;
    133 	}
    134 	for (; argc--; argv++) {
    135 		state = 0;
    136 		for (ptr = *argv; (c = unescape(&ptr, &state)) != -1;)
    137                         sti(fd, c);
    138 		if (c == -1 && errno != ENODATA)
    139 			warn("Cannot decode `%s'", *argv);
    140 		if (argc != 0)
    141                         sti(fd, ' ');
    142 	}
    143 
    144 	(void)close(fd);
    145 	return 0;
    146 }
    147