1 /*- 2 * Copyright (c) 1992 Christopher G. Demetriou 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote 14 * products derived from this software without specific written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* comcontrol.c */ 30 31 #include <sys/types.h> 32 #include <sys/ioctl.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <ctype.h> 36 #include <fcntl.h> 37 38 39 void usage(char *progname) 40 { 41 fprintf(stderr, "usage: %s <filename> [[-]bidir] [dtrwait <n>]\n", progname); 42 exit(1); 43 } 44 45 int main(int argc, char *argv[]) 46 { 47 int fd; 48 int res; 49 int dtrwait; 50 51 if ((argc < 2) || (argc > 5)) usage(argv[0]); 52 53 fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0); 54 if (fd < 0) { 55 fprintf(stderr, "%s: couldn't open file %s\n", argv[0], argv[1]); 56 perror("open"); 57 exit(1); 58 } 59 60 if (argc == 2) { 61 if (ioctl(fd, TIOCMGBIDIR, &res) >= 0) { 62 if (!res) printf("-"); 63 printf("bidir "); 64 } 65 if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) { 66 perror("TIOCMGDTRWAIT"); 67 exit(1); 68 } 69 printf("dtrwait %d\n", dtrwait); 70 } else { 71 char *prg = argv[0]; 72 73 res = dtrwait = -1; 74 while (argv[2] != NULL) { 75 if (!strcmp(argv[2],"bidir")) { 76 if (res >= 0) 77 usage(prg); 78 res = 1; 79 argv++; 80 } else if (!strcmp(argv[2],"-bidir")) { 81 if (res >= 0) 82 usage(prg); 83 res = 0; 84 argv++; 85 } else if (!strcmp(argv[2],"dtrwait")) { 86 if (dtrwait >= 0) 87 usage(prg); 88 if (argv[3] == NULL || !isdigit(argv[3][0])) 89 usage(prg); 90 dtrwait = atoi(argv[3]); 91 argv += 2; 92 } else { 93 usage(prg); 94 } 95 } 96 if (res >= 0) { 97 if (ioctl(fd, TIOCMSBIDIR, &res) < 0) { 98 perror("TIOCMSBIDIR"); 99 exit(1); 100 } 101 } 102 if (dtrwait >= 0) { 103 if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) { 104 perror("TIOCMSDTRWAIT"); 105 exit(1); 106 } 107 } 108 } 109 110 close(fd); 111 exit(0); 112 } 113