whr | b973f2b | 2000-05-05 19:34:50 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 22 | * |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| 24 | * Mountain View, CA 94043, or: |
| 25 | * |
| 26 | * http://www.sgi.com |
| 27 | * |
| 28 | * For further information regarding this notice, see: |
| 29 | * |
| 30 | * http://oss.sgi.com/projects/GenInfo/NoticeExplan/ |
| 31 | */ |
| 32 | /************************************************************** |
| 33 | * |
alaffin | cc2e555 | 2000-07-27 17:13:18 +0000 | [diff] [blame] | 34 | * OS Testing - Silicon Graphics, Inc. |
whr | b973f2b | 2000-05-05 19:34:50 +0000 | [diff] [blame] | 35 | * |
| 36 | * FUNCTION NAME : parse_open_flags |
| 37 | * openflags2symbols |
| 38 | * |
| 39 | * FUNCTION TITLE : converts open flag symbols into bitmask |
| 40 | * converts open flag bitmask into symbols |
| 41 | * |
| 42 | * SYNOPSIS: |
| 43 | * int parse_open_flags(symbols, badname) |
| 44 | * char *symbols; |
| 45 | * char **badname; |
| 46 | * |
| 47 | * char *openflags2symbols(openflags, sep, mode) |
| 48 | * int openflags; |
| 49 | * char *sep; |
| 50 | * int mode; |
| 51 | * |
| 52 | * AUTHOR : Richard Logan |
| 53 | * |
| 54 | * CO-PILOT(s) : Dean Roehrich |
| 55 | * |
| 56 | * INITIAL RELEASE : UNICOS 8.0 |
| 57 | * |
| 58 | * DESIGN DESCRIPTION |
| 59 | * The parse_open_flags function can be used to convert |
| 60 | * a list of comma separated open(2) flag symbols (i.e. O_TRUNC) |
| 61 | * into the bitmask that can be used by open(2). |
| 62 | * If a symbol is unknown and <badname> is not NULL, <badname> |
| 63 | * will updated to point that symbol in <string>. |
| 64 | * Parse_open_flags will return -1 on this error. |
| 65 | * Otherwise parse_open_flags will return the open flag bitmask. |
| 66 | * If parse_open_flags returns, <string> will left unchanged. |
| 67 | * |
| 68 | * The openflags2symbols function attempts to convert open flag |
| 69 | * bits into human readable symbols (i.e. O_TRUNC). If there |
| 70 | * are more than one symbol, the <sep> string will be placed as |
| 71 | * a separator between symbols. Commonly used separators would |
| 72 | * be a comma "," or pipe "|". If <mode> is one and not all |
| 73 | * <openflags> bits can be converted to symbols, the "UNKNOWN" |
| 74 | * symbol will be added to return string. |
| 75 | * Openflags2symbols will return the indentified symbols. |
| 76 | * If no symbols are recognized the return value will be a empty |
| 77 | * string or the "UNKNOWN" symbol. |
| 78 | * |
| 79 | * SPECIAL REQUIREMENTS |
| 80 | * None. |
| 81 | * |
| 82 | * UPDATE HISTORY |
| 83 | * This should contain the description, author, and date of any |
| 84 | * "interesting" modifications (i.e. info should helpful in |
| 85 | * maintaining/enhancing this module). |
| 86 | * username description |
| 87 | * ---------------------------------------------------------------- |
| 88 | * rrl This code was first created during the beginning |
| 89 | * of the SFS testing days. I think that was in 1993. |
| 90 | * This code was updated in 05/96. |
| 91 | * (05/96) openflags2symbols was written. |
| 92 | * |
| 93 | * BUGS/LIMITATIONS |
| 94 | * Currently (05/96) all known symbols are coded into openflags2symbols. |
| 95 | * If new open flags are added this code will have to updated |
| 96 | * to know about them or they will not be recognized. |
| 97 | * |
| 98 | **************************************************************/ |
| 99 | |
| 100 | #include <stdio.h> |
| 101 | #include <unistd.h> |
| 102 | #include <fcntl.h> |
| 103 | #include <sys/param.h> |
| 104 | #include <string.h> /* strcat */ |
| 105 | #include "open_flags.h" |
| 106 | |
| 107 | #define UNKNOWN_SYMBOL "UNKNOWN" |
| 108 | |
| 109 | static char Open_symbols[512]; /* space for openflags2symbols return value */ |
| 110 | |
| 111 | struct open_flag_t { |
| 112 | char *symbol; |
| 113 | int flag; |
| 114 | }; |
| 115 | |
| 116 | static struct open_flag_t Open_flags[] = { |
| 117 | { "O_RDONLY", O_RDONLY }, |
| 118 | { "O_WRONLY", O_WRONLY }, |
| 119 | { "O_RDWR", O_RDWR }, |
| 120 | { "O_SYNC", O_SYNC }, |
| 121 | { "O_CREAT", O_CREAT }, |
| 122 | { "O_TRUNC", O_TRUNC }, |
| 123 | { "O_EXCL", O_EXCL }, |
| 124 | { "O_APPEND", O_APPEND }, |
| 125 | { "O_NONBLOCK", O_NONBLOCK }, |
| 126 | #if O_NOCTTY |
| 127 | { "O_NOCTTY", O_NOCTTY }, |
| 128 | #endif |
| 129 | #if O_DSYNC |
| 130 | { "O_DSYNC", O_DSYNC }, |
| 131 | #endif |
| 132 | #if O_RSYNC |
| 133 | { "O_RSYNC", O_RSYNC }, |
| 134 | #endif |
| 135 | #if O_ASYNC |
| 136 | { "O_ASYNC", O_ASYNC }, |
| 137 | #endif |
| 138 | #if O_PTYIGN |
| 139 | { "O_PTYIGN", O_PTYIGN }, |
| 140 | #endif |
| 141 | #if O_NDELAY |
| 142 | { "O_NDELAY", O_NDELAY }, |
| 143 | #endif |
| 144 | #if O_RAW |
| 145 | { "O_RAW", O_RAW }, |
| 146 | #endif |
| 147 | #ifdef O_SSD |
| 148 | { "O_SSD", O_SSD }, |
| 149 | #endif |
| 150 | #if O_BIG |
| 151 | { "O_BIG", O_BIG }, |
| 152 | #endif |
| 153 | #if O_PLACE |
| 154 | { "O_PLACE", O_PLACE }, |
| 155 | #endif |
| 156 | #if O_RESTART |
| 157 | { "O_RESTART", O_RESTART }, |
| 158 | #endif |
| 159 | #if O_SFSXOP |
| 160 | { "O_SFSXOP", O_SFSXOP }, |
| 161 | #endif |
| 162 | #if O_SFS_DEFER_TM |
| 163 | { "O_SFS_DEFER_TM", O_SFS_DEFER_TM }, |
| 164 | #endif |
| 165 | #if O_WELLFORMED |
| 166 | { "O_WELLFORMED", O_WELLFORMED }, |
| 167 | #endif |
| 168 | #if O_LDRAW |
| 169 | { "O_LDRAW", O_LDRAW }, |
| 170 | #endif |
| 171 | #if O_T3D |
| 172 | { "O_T3D", O_T3D }, |
| 173 | #endif /* O_T3D */ |
| 174 | #if O_PARALLEL |
| 175 | { "O_PARALLEL", O_PARALLEL }, |
| 176 | { "O_FSA", O_PARALLEL|O_WELLFORMED|O_RAW }, /* short cut */ |
| 177 | #endif /* O_PARALLEL */ |
| 178 | #ifdef O_LARGEFILE |
| 179 | { "O_LARGEFILE", O_LARGEFILE }, |
| 180 | #endif |
| 181 | #ifdef O_DIRECT |
| 182 | { "O_DIRECT", O_DIRECT }, |
| 183 | #endif |
| 184 | #ifdef O_PRIV |
| 185 | { "O_PRIV", O_PRIV }, |
| 186 | #endif |
| 187 | |
| 188 | }; |
| 189 | |
| 190 | int |
| 191 | parse_open_flags(char *string, char **badname) |
| 192 | { |
| 193 | int bits = 0; |
| 194 | char *name; |
| 195 | char *cc; |
| 196 | char savecc; |
| 197 | int found; |
robbiew | ffad5ea | 2003-06-18 17:40:39 +0000 | [diff] [blame^] | 198 | unsigned int ind; |
whr | b973f2b | 2000-05-05 19:34:50 +0000 | [diff] [blame] | 199 | |
| 200 | name=string; |
| 201 | cc=name; |
| 202 | |
| 203 | while ( 1 ) { |
| 204 | |
| 205 | for(; ((*cc != ',') && (*cc != '\0')); cc++); |
| 206 | savecc = *cc; |
| 207 | *cc = '\0'; |
| 208 | |
| 209 | found = 0; |
| 210 | |
| 211 | for(ind=0; ind < sizeof(Open_flags)/sizeof(struct open_flag_t); ind++) { |
| 212 | if ( strcmp(name, Open_flags[ind].symbol) == 0 ) { |
| 213 | bits |= Open_flags[ind].flag; |
| 214 | found=1; |
| 215 | break; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | *cc = savecc; /* restore string */ |
| 220 | |
| 221 | if ( found == 0 ) { /* invalid name */ |
| 222 | if ( badname != NULL ) |
| 223 | *badname = name; |
| 224 | return -1; |
| 225 | } |
| 226 | |
| 227 | if ( savecc == '\0' ) |
| 228 | break; |
| 229 | |
| 230 | name = ++cc; |
| 231 | |
| 232 | } /* end while */ |
| 233 | |
| 234 | return bits; |
| 235 | |
| 236 | } /* end of parse_open_flags */ |
| 237 | |
| 238 | |
| 239 | char * |
| 240 | openflags2symbols(int openflags, char *sep, int mode) |
| 241 | { |
| 242 | int ind; |
| 243 | int size; |
| 244 | int bits = openflags; |
| 245 | int havesome=0; |
| 246 | |
| 247 | Open_symbols[0]='\0'; |
| 248 | |
| 249 | size=sizeof(Open_flags)/sizeof(struct open_flag_t); |
| 250 | |
| 251 | /* |
| 252 | * Deal with special case of O_RDONLY. If O_WRONLY nor O_RDWR |
| 253 | * bits are not set, assume O_RDONLY. |
| 254 | */ |
| 255 | |
| 256 | if ( (bits & (O_WRONLY | O_RDWR)) == 0 ) { |
| 257 | strcat(Open_symbols, "O_RDONLY"); |
| 258 | havesome=1; |
| 259 | } |
| 260 | |
| 261 | /* |
| 262 | * Loop through all but O_RDONLY elments of Open_flags |
| 263 | */ |
| 264 | for(ind=1; ind < size; ind++) { |
| 265 | |
| 266 | if ( (bits & Open_flags[ind].flag) == Open_flags[ind].flag ) { |
| 267 | if ( havesome ) |
| 268 | strcat(Open_symbols, sep); |
| 269 | |
| 270 | strcat(Open_symbols, Open_flags[ind].symbol); |
| 271 | havesome++; |
| 272 | |
| 273 | /* remove flag bits from bits */ |
| 274 | bits = bits & (~Open_flags[ind].flag); |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * If not all bits were identified and mode was equal to 1, |
| 280 | * added UNKNOWN_SYMBOL to return string |
| 281 | */ |
| 282 | if ( bits && mode == 1 ) { /* not all bits were identified */ |
| 283 | if ( havesome ) |
| 284 | strcat(Open_symbols, sep); |
| 285 | strcat(Open_symbols, UNKNOWN_SYMBOL); |
| 286 | } |
| 287 | |
| 288 | return Open_symbols; |
| 289 | |
| 290 | } /* end of openflags2symbols */ |
| 291 | |
| 292 | |
| 293 | #ifdef UNIT_TEST |
| 294 | |
| 295 | /* |
| 296 | * The following code provides a UNIT test main for |
| 297 | * parse_open_flags and openflags2symbols functions. |
| 298 | */ |
| 299 | |
| 300 | int |
| 301 | main(argc, argv) |
| 302 | int argc; |
| 303 | char **argv; |
| 304 | { |
| 305 | int bits; |
| 306 | int ret; |
| 307 | char *err; |
| 308 | |
| 309 | if (argc == 1 ) { |
| 310 | printf("Usage: %s openflagsbits\n\t%s symbols\n", argv[0], argv[0]); |
| 311 | exit(1); |
| 312 | } |
| 313 | |
| 314 | if ( sscanf(argv[1], "%i", &bits) == 1 ) { |
| 315 | printf("openflags2symbols(%#o, \",\", 1) returned %s\n", |
| 316 | bits, openflags2symbols(bits, ",", 1)); |
| 317 | |
| 318 | } else { |
| 319 | ret=parse_open_flags(argv[1], &err); |
| 320 | if ( ret == -1 ) |
| 321 | printf("parse_open_flags(%s, &err) returned -1, err = %s\n", |
| 322 | argv[0], err); |
| 323 | else |
| 324 | printf("parse_open_flags(%s, &err) returned %#o\n", argv[0], ret); |
| 325 | } |
| 326 | |
| 327 | exit(0); |
| 328 | } |
| 329 | |
| 330 | #endif /* end of UNIT_TEST */ |