1 /* $OpenBSD: error.c,v 1.17 2018/09/18 17:48:22 millert Exp $ */ 2 /* $NetBSD: err.c,v 1.6 1995/03/21 09:02:47 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1980, 1991, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <stdarg.h> 37 38 #include "csh.h" 39 #include "extern.h" 40 41 char *seterr = NULL; /* Holds last error if there was one */ 42 43 #define ERR_FLAGS 0xf0000000 44 #define ERR_NAME 0x10000000 45 #define ERR_SILENT 0x20000000 46 #define ERR_OLD 0x40000000 47 48 static char *errorlist[] = 49 { 50 #define ERR_SYNTAX 0 51 "Syntax Error", 52 #define ERR_NOTALLOWED 1 53 "%s is not allowed", 54 #define ERR_WTOOLONG 2 55 "Word too long", 56 #define ERR_LTOOLONG 3 57 "$< line too long", 58 #define ERR_DOLZERO 4 59 "No file for $0", 60 #define ERR_DOLQUEST 5 61 "$? not allowed here", 62 #define ERR_INCBR 6 63 "Incomplete [] modifier", 64 #define ERR_EXPORD 7 65 "$ expansion must end before ]", 66 #define ERR_BADMOD 8 67 "Bad : modifier in $ (%c)", 68 #define ERR_SUBSCRIPT 9 69 "Subscript error", 70 #define ERR_BADNUM 10 71 "Badly formed number", 72 #define ERR_NOMORE 11 73 "No more words", 74 #define ERR_FILENAME 12 75 "Missing file name", 76 #define ERR_GLOB 13 77 "Internal glob error", 78 #define ERR_COMMAND 14 79 "Command not found", 80 #define ERR_TOOFEW 15 81 "Too few arguments", 82 #define ERR_TOOMANY 16 83 "Too many arguments", 84 #define ERR_DANGER 17 85 "Too dangerous to alias that", 86 #define ERR_EMPTYIF 18 87 "Empty if", 88 #define ERR_IMPRTHEN 19 89 "Improper then", 90 #define ERR_NOPAREN 20 91 "Words not parenthesized", 92 #define ERR_NOTFOUND 21 93 "%s not found", 94 #define ERR_MASK 22 95 "Improper mask", 96 #define ERR_LIMIT 23 97 "No such limit", 98 #define ERR_TOOLARGE 24 99 "Argument too large", 100 #define ERR_SCALEF 25 101 "Improper or unknown scale factor", 102 #define ERR_UNDVAR 26 103 "Undefined variable", 104 #define ERR_DEEP 27 105 "Directory stack not that deep", 106 #define ERR_BADSIG 28 107 "Bad signal number", 108 #define ERR_UNKSIG 29 109 "Unknown signal; kill -l lists signals", 110 #define ERR_VARBEGIN 30 111 "Variable name must begin with a letter", 112 #define ERR_VARTOOLONG 31 113 "Variable name too long", 114 #define ERR_VARALNUM 32 115 "Variable name must contain alphanumeric characters", 116 #define ERR_JOBCONTROL 33 117 "No job control in this shell", 118 #define ERR_EXPRESSION 34 119 "Expression Syntax", 120 #define ERR_NOHOMEDIR 35 121 "No home directory", 122 #define ERR_CANTCHANGE 36 123 "Can't change to home directory", 124 #define ERR_NULLCOM 37 125 "Invalid null command", 126 #define ERR_ASSIGN 38 127 "Assignment missing expression", 128 #define ERR_UNKNOWNOP 39 129 "Unknown operator", 130 #define ERR_AMBIG 40 131 "Ambiguous", 132 #define ERR_EXISTS 41 133 "%s: File exists", 134 #define ERR_INTR 42 135 "Interrupted", 136 #define ERR_RANGE 43 137 "Subscript out of range", 138 #define ERR_OVERFLOW 44 139 "Line overflow", 140 #define ERR_VARMOD 45 141 "Unknown variable modifier", 142 #define ERR_NOSUCHJOB 46 143 "No such job", 144 #define ERR_TERMINAL 47 145 "Can't from terminal", 146 #define ERR_NOTWHILE 48 147 "Not in while/foreach", 148 #define ERR_NOPROC 49 149 "No more processes", 150 #define ERR_NOMATCH 50 151 "No match", 152 #define ERR_MISSING 51 153 "Missing %c", 154 #define ERR_UNMATCHED 52 155 "Unmatched %c", 156 #define ERR_NOMEM 53 157 "Out of memory", 158 #define ERR_PIPE 54 159 "Can't make pipe", 160 #define ERR_SYSTEM 55 161 "%s: %s", 162 #define ERR_STRING 56 163 "%s", 164 #define ERR_JOBS 57 165 "usage: jobs [-l]", 166 #define ERR_JOBARGS 58 167 "Arguments should be jobs or process id's", 168 #define ERR_JOBCUR 59 169 "No current job", 170 #define ERR_JOBPREV 60 171 "No previous job", 172 #define ERR_JOBPAT 61 173 "No job matches pattern", 174 #define ERR_NESTING 62 175 "Fork nesting > %d; maybe `...` loop", 176 #define ERR_JOBCTRLSUB 63 177 "No job control in subshells", 178 #define ERR_BADPLPS 64 179 "Badly placed ()'s", 180 #define ERR_STOPPED 65 181 "%sThere are suspended jobs", 182 #define ERR_NODIR 66 183 "No other directory", 184 #define ERR_EMPTY 67 185 "Directory stack empty", 186 #define ERR_BADDIR 68 187 "Bad directory", 188 #define ERR_DIRUS 69 189 "usage: %s [-lnv]%s", 190 #define ERR_HFLAG 70 191 "No operand for -h flag", 192 #define ERR_NOTLOGIN 71 193 "Not a login shell", 194 #define ERR_DIV0 72 195 "Division by 0", 196 #define ERR_MOD0 73 197 "Mod by 0", 198 #define ERR_BADSCALE 74 199 "Bad scaling; did you mean \"%s\"?", 200 #define ERR_SUSPLOG 75 201 "Can't suspend a login shell (yet)", 202 #define ERR_UNKUSER 76 203 "Unknown user: %s", 204 #define ERR_NOHOME 77 205 "No $home variable set", 206 #define ERR_HISTUS 78 207 "usage: history [-hr] [n]", 208 #define ERR_SPDOLLT 79 209 "$, ! or < not allowed with $# or $?", 210 #define ERR_NEWLINE 80 211 "Newline in variable name", 212 #define ERR_SPSTAR 81 213 "* not allowed with $# or $?", 214 #define ERR_DIGIT 82 215 "$?<digit> or $#<digit> not allowed", 216 #define ERR_VARILL 83 217 "Illegal variable name", 218 #define ERR_NLINDEX 84 219 "Newline in variable index", 220 #define ERR_EXPOVFL 85 221 "Expansion buffer overflow", 222 #define ERR_VARSYN 86 223 "Variable syntax", 224 #define ERR_BADBANG 87 225 "Bad ! form", 226 #define ERR_NOSUBST 88 227 "No previous substitute", 228 #define ERR_BADSUBST 89 229 "Bad substitute", 230 #define ERR_LHS 90 231 "No previous left hand side", 232 #define ERR_RHSLONG 91 233 "Right hand side too long", 234 #define ERR_BADBANGMOD 92 235 "Bad ! modifier: %c", 236 #define ERR_MODFAIL 93 237 "Modifier failed", 238 #define ERR_SUBOVFL 94 239 "Substitution buffer overflow", 240 #define ERR_BADBANGARG 95 241 "Bad ! arg selector", 242 #define ERR_NOSEARCH 96 243 "No prev search", 244 #define ERR_NOEVENT 97 245 "%s: Event not found", 246 #define ERR_TOOMANYRP 98 247 "Too many )'s", 248 #define ERR_TOOMANYLP 99 249 "Too many ('s", 250 #define ERR_BADPLP 100 251 "Badly placed (", 252 #define ERR_MISRED 101 253 "Missing name for redirect", 254 #define ERR_OUTRED 102 255 "Ambiguous output redirect", 256 #define ERR_REDPAR 103 257 "Can't << within ()'s", 258 #define ERR_INRED 104 259 "Ambiguous input redirect", 260 #define ERR_ALIASLOOP 105 261 "Alias loop", 262 #define ERR_HISTLOOP 106 263 "!# History loop", 264 #define ERR_ARCH 107 265 "%s: %s. Wrong Architecture", 266 #define ERR_FILEINQ 108 267 "Malformed file inquiry", 268 #define ERR_SELOVFL 109 269 "Selector overflow", 270 #define ERR_INVALID 110 271 "Invalid Error" 272 }; 273 274 /* 275 * The parser and scanner set up errors for later by calling seterr, 276 * which sets the variable err as a side effect; later to be tested, 277 * e.g. in process. 278 */ 279 void 280 seterror(int id, ...) 281 { 282 if (seterr == 0) { 283 char berr[BUFSIZ]; 284 va_list va; 285 286 va_start(va, id); 287 if (id < 0 || id >= sizeof(errorlist) / sizeof(errorlist[0])) 288 id = ERR_INVALID; 289 vsnprintf(berr, sizeof(berr), errorlist[id], va); 290 va_end(va); 291 292 seterr = xstrdup(berr); 293 } 294 } 295 296 /* 297 * Print the error with the given id. 298 * 299 * Special ids: 300 * ERR_SILENT: Print nothing. 301 * ERR_OLD: Print the previously set error if one was there. 302 * otherwise return. 303 * ERR_NAME: If this bit is set, print the name of the function 304 * in bname 305 * 306 * This routine always resets or exits. The flag haderr 307 * is set so the routine who catches the unwind can propagate 308 * it if they want. 309 * 310 * Note that any open files at the point of error will eventually 311 * be closed in the routine process in sh.c which is the only 312 * place error unwinds are ever caught. 313 */ 314 void 315 stderror(int id, ...) 316 { 317 va_list va; 318 int flags = id & ERR_FLAGS; 319 320 id &= ~ERR_FLAGS; 321 322 if ((flags & ERR_OLD) && seterr == NULL) 323 return; 324 325 if (id < 0 || id >= sizeof(errorlist) / sizeof(errorlist[0])) 326 id = ERR_INVALID; 327 328 (void) fflush(cshout); 329 (void) fflush(csherr); 330 haderr = 1; /* Now to diagnostic output */ 331 timflg = 0; /* This isn't otherwise reset */ 332 333 334 if (!(flags & ERR_SILENT)) { 335 if (flags & ERR_NAME) 336 (void) fprintf(csherr, "%s: ", bname); 337 if ((flags & ERR_OLD)) 338 /* Old error. */ 339 (void) fprintf(csherr, "%s.\n", seterr); 340 else { 341 va_start(va, id); 342 (void) vfprintf(csherr, errorlist[id], va); 343 va_end(va); 344 (void) fprintf(csherr, ".\n"); 345 } 346 } 347 348 free(seterr); 349 seterr = NULL; 350 351 blkfree(pargv); 352 pargv = NULL; 353 blkfree(gargv); 354 gargv = NULL; 355 356 (void) fflush(cshout); 357 (void) fflush(csherr); 358 didfds = 0; /* Forget about 0,1,2 */ 359 /* 360 * Go away if -e or we are a child shell 361 */ 362 if (!exitset || exiterr || child) 363 xexit(1); 364 365 /* 366 * Reset the state of the input. This buffered seek to end of file will 367 * also clear the while/foreach stack. 368 */ 369 btoeof(); 370 371 set(STRstatus, Strsave(STR1)); 372 if (tpgrp > 0) 373 (void) tcsetpgrp(FSHTTY, tpgrp); 374 reset(); /* Unwind */ 375 } 376