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 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <ctype.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <fcntl.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <sys/types.h> 41 #include <sys/ioctl.h> 42 43 static void 44 usage() 45 { 46 fprintf(stderr, 47 "usage: comcontrol <filename> [dtrwait <n>] [drainwait <n>]\n"); 48 exit(1); 49 } 50 51 int 52 main(int argc, char *argv[]) 53 { 54 int fd; 55 int res = 0; 56 int print_dtrwait = 1, print_drainwait = 1; 57 int dtrwait = -1, drainwait = -1; 58 59 if (argc < 2) 60 usage(); 61 62 if (strcmp(argv[1], "-") == 0) 63 fd = STDIN_FILENO; 64 else { 65 fd = open(argv[1], O_RDONLY|O_NONBLOCK, 0); 66 if (fd < 0) { 67 warn("couldn't open file %s", argv[1]); 68 return 1; 69 } 70 } 71 if (argc == 2) { 72 if (ioctl(fd, TIOCMGDTRWAIT, &dtrwait) < 0) { 73 print_dtrwait = 0; 74 if (errno != ENOTTY) { 75 res = 1; 76 warn("TIOCMGDTRWAIT"); 77 } 78 } 79 if (ioctl(fd, TIOCGDRAINWAIT, &drainwait) < 0) { 80 print_drainwait = 0; 81 if (errno != ENOTTY) { 82 res = 1; 83 warn("TIOCGDRAINWAIT"); 84 } 85 } 86 if (print_dtrwait) 87 printf("dtrwait %d ", dtrwait); 88 if (print_drainwait) 89 printf("drainwait %d ", drainwait); 90 printf("\n"); 91 } else { 92 while (argv[2] != NULL) { 93 if (!strcmp(argv[2],"dtrwait")) { 94 if (dtrwait >= 0) 95 usage(); 96 if (argv[3] == NULL || !isdigit(argv[3][0])) 97 usage(); 98 dtrwait = atoi(argv[3]); 99 argv += 2; 100 } else if (!strcmp(argv[2],"drainwait")) { 101 if (drainwait >= 0) 102 usage(); 103 if (argv[3] == NULL || !isdigit(argv[3][0])) 104 usage(); 105 drainwait = atoi(argv[3]); 106 argv += 2; 107 } else 108 usage(); 109 } 110 if (dtrwait >= 0) { 111 if (ioctl(fd, TIOCMSDTRWAIT, &dtrwait) < 0) { 112 res = 1; 113 warn("TIOCMSDTRWAIT"); 114 } 115 } 116 if (drainwait >= 0) { 117 if (ioctl(fd, TIOCSDRAINWAIT, &drainwait) < 0) { 118 res = 1; 119 warn("TIOCSDRAINWAIT"); 120 } 121 } 122 } 123 124 close(fd); 125 return res; 126 } 127