commands.c revision 1.2.2.1
1 /* $NetBSD: commands.c,v 1.2.2.1 2011/06/23 14:20:40 cherry Exp $ */ 2 3 /*- 4 * Copyright 2009 Brett Lymn <blymn (at) NetBSD.org> 5 * 6 * All rights reserved. 7 * 8 * This code has been donated to The NetBSD Foundation by the Author. 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. The name of the author may not be used to endorse or promote products 16 * derived from this software withough specific prior written permission 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * 30 */ 31 32 #include <curses.h> 33 #include <string.h> 34 #include <stdlib.h> 35 #include <stdio.h> 36 #include <unistd.h> 37 #include <err.h> 38 #include <sys/types.h> 39 #include "returns.h" 40 #include "slave.h" 41 #include "command_table.h" 42 43 extern int cmdpipe[2]; 44 extern int slvpipe[2]; 45 46 static void report_type(returns_enum_t); 47 static void report_message(int, const char *); 48 49 /* 50 * Match the passed command string and execute the associated test 51 * function. 52 */ 53 void 54 command_execute(char *func, int nargs, char **args) 55 { 56 size_t i; 57 58 i = 0; 59 while (i < ncmds) { 60 if (strcasecmp(func, commands[i].name) == 0) { 61 /* matched function */ 62 commands[i].func(nargs, args); 63 return; 64 } 65 i++; 66 } 67 68 report_status("UNKNOWN_FUNCTION"); 69 } 70 71 /* 72 * Report an pointer value back to the director 73 */ 74 void 75 report_ptr(void *ptr) 76 { 77 char *string; 78 79 asprintf(&string, "%p", ptr); 80 report_status(string); 81 free(string); 82 } 83 84 /* 85 * Report an integer value back to the director 86 */ 87 void 88 report_int(int value) 89 { 90 char *string; 91 92 asprintf(&string, "%d", value); 93 report_status(string); 94 free(string); 95 } 96 97 /* 98 * Report either an ERR or OK back to the director 99 */ 100 void 101 report_return(int status) 102 { 103 if (status == ERR) 104 report_type(ret_err); 105 else if (status == OK) 106 report_type(ret_ok); 107 else 108 report_status("INVALID_RETURN"); 109 } 110 111 /* 112 * Report the type back to the director via the command pipe 113 */ 114 static void 115 report_type(returns_enum_t return_type) 116 { 117 int type; 118 119 type = return_type; 120 if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0) 121 err(1, "command pipe write for status type failed"); 122 123 } 124 125 /* 126 * Report the number of returns back to the director via the command pipe 127 */ 128 void 129 report_count(int count) 130 { 131 int type; 132 133 type = ret_count; 134 if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0) 135 err(1, "command pipe write for count type failed"); 136 137 if (write(slvpipe[WRITE_PIPE], &count, sizeof(int)) < 0) 138 err(1, "command pipe write for count"); 139 } 140 141 /* 142 * Report the status back to the director via the command pipe 143 */ 144 void 145 report_status(const char *status) 146 { 147 report_message(ret_string, status); 148 } 149 150 /* 151 * Report an error message back to the director via the command pipe. 152 */ 153 void 154 report_error(const char *status) 155 { 156 report_message(ret_slave_error, status); 157 } 158 159 /* 160 * Report the message with the given type back to the director via the 161 * command pipe. 162 */ 163 static void 164 report_message(int type, const char *status) 165 { 166 int len; 167 168 len = strlen(status); 169 170 if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0) 171 err(1, "command pipe write for message type failed"); 172 173 if (write(slvpipe[WRITE_PIPE], &len, sizeof(int)) < 0) 174 err(1, "command pipe write for message length failed"); 175 176 if (write(slvpipe[WRITE_PIPE], status, len) < 0) 177 err(1, "command pipe write of message data failed"); 178 } 179 180 /* 181 * Report a string of chtype back to the director via the command pipe. 182 */ 183 void 184 report_nstr(chtype *string) 185 { 186 int len, type; 187 chtype *p; 188 189 len = 0; 190 p = string; 191 192 while ((*p++ & __CHARTEXT) != 0) { 193 len++; 194 } 195 196 type = ret_byte; 197 if (write(slvpipe[WRITE_PIPE], &type, sizeof(int)) < 0) 198 err(1, "%s: command pipe write for status type failed", 199 __func__); 200 201 if (write(slvpipe[WRITE_PIPE], &len, sizeof(int)) < 0) 202 err(1, "%s: command pipe write for status length failed", 203 __func__); 204 205 if (write(slvpipe[WRITE_PIPE], string, len) < 0) 206 err(1, "%s: command pipe write of status data failed", 207 __func__); 208 } 209 210 /* 211 * Check the number of args we received are what we expect. Return an 212 * error if they do not match. 213 */ 214 int 215 check_arg_count(int nargs, int expected) 216 { 217 if (nargs != expected) { 218 report_count(1); 219 report_error("INCORRECT_ARGUMENT_NUMBER"); 220 return(1); 221 } 222 223 return(0); 224 } 225
Indexes created Wed Oct 01 15:09:59 GMT 2025