| 1 | /* $NetBSD: error.c,v 1.31 2003/08/07 09:05:30 agc Exp $ */
|
|---|
| 2 |
|
|---|
| 3 | /*-
|
|---|
| 4 | * Copyright (c) 1991, 1993
|
|---|
| 5 | * The Regents of the University of California. All rights reserved.
|
|---|
| 6 | *
|
|---|
| 7 | * This code is derived from software contributed to Berkeley by
|
|---|
| 8 | * Kenneth Almquist.
|
|---|
| 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. Redistributions in binary form must reproduce the above copyright
|
|---|
| 16 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 17 | * documentation and/or other materials provided with the distribution.
|
|---|
| 18 | * 3. Neither the name of the University nor the names of its contributors
|
|---|
| 19 | * may be used to endorse or promote products derived from this software
|
|---|
| 20 | * without specific prior written permission.
|
|---|
| 21 | *
|
|---|
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|---|
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|---|
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|---|
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|---|
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|---|
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|---|
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|---|
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|---|
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|---|
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|---|
| 32 | * SUCH DAMAGE.
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #if 0
|
|---|
| 36 | #ifndef lint
|
|---|
| 37 | static char sccsid[] = "@(#)error.c 8.2 (Berkeley) 5/4/95";
|
|---|
| 38 | #else
|
|---|
| 39 | __RCSID("$NetBSD: error.c,v 1.31 2003/08/07 09:05:30 agc Exp $");
|
|---|
| 40 | #endif /* not lint */
|
|---|
| 41 | #endif
|
|---|
| 42 |
|
|---|
| 43 | /*
|
|---|
| 44 | * Errors and exceptions.
|
|---|
| 45 | */
|
|---|
| 46 |
|
|---|
| 47 | #include <stdlib.h>
|
|---|
| 48 | #include <errno.h>
|
|---|
| 49 | #include <stdio.h>
|
|---|
| 50 | #include <string.h>
|
|---|
| 51 |
|
|---|
| 52 | #include "shell.h"
|
|---|
| 53 | #include "main.h"
|
|---|
| 54 | #include "options.h"
|
|---|
| 55 | #include "output.h"
|
|---|
| 56 | #include "error.h"
|
|---|
| 57 | #include "show.h"
|
|---|
| 58 | #include "shinstance.h"
|
|---|
| 59 |
|
|---|
| 60 |
|
|---|
| 61 | /*
|
|---|
| 62 | * Code to handle exceptions in C.
|
|---|
| 63 | */
|
|---|
| 64 |
|
|---|
| 65 | /*struct jmploc *handler;
|
|---|
| 66 | int exception;
|
|---|
| 67 | volatile int suppressint;
|
|---|
| 68 | volatile int intpending;
|
|---|
| 69 | char *commandname;*/
|
|---|
| 70 |
|
|---|
| 71 | SH_NORETURN_1
|
|---|
| 72 | static void exverror(shinstance *psh, int, const char *, va_list) SH_NORETURN_2;
|
|---|
| 73 |
|
|---|
| 74 | /*
|
|---|
| 75 | * Called to raise an exception. Since C doesn't include exceptions, we
|
|---|
| 76 | * just do a longjmp to the exception handler. The type of exception is
|
|---|
| 77 | * stored in the global variable "exception".
|
|---|
| 78 | */
|
|---|
| 79 |
|
|---|
| 80 | SH_NORETURN_1 void
|
|---|
| 81 | exraise(shinstance *psh, int e)
|
|---|
| 82 | {
|
|---|
| 83 | if (psh->handler == NULL)
|
|---|
| 84 | sh_abort(psh);
|
|---|
| 85 | psh->exception = e;
|
|---|
| 86 | longjmp(psh->handler->loc, 1);
|
|---|
| 87 | }
|
|---|
| 88 |
|
|---|
| 89 |
|
|---|
| 90 | /*
|
|---|
| 91 | * Called from trap.c when a SIGINT is received. (If the user specifies
|
|---|
| 92 | * that SIGINT is to be trapped or ignored using the trap builtin, then
|
|---|
| 93 | * this routine is not called.) Suppressint is nonzero when interrupts
|
|---|
| 94 | * are held using the INTOFF macro. The call to _exit is necessary because
|
|---|
| 95 | * there is a short period after a fork before the signal handlers are
|
|---|
| 96 | * set to the appropriate value for the child. (The test for iflag is
|
|---|
| 97 | * just defensive programming.)
|
|---|
| 98 | */
|
|---|
| 99 |
|
|---|
| 100 | void
|
|---|
| 101 | onint(shinstance *psh)
|
|---|
| 102 | {
|
|---|
| 103 | shsigset_t nsigset;
|
|---|
| 104 |
|
|---|
| 105 | if (psh->suppressint) {
|
|---|
| 106 | psh->intpending = 1;
|
|---|
| 107 | return;
|
|---|
| 108 | }
|
|---|
| 109 | psh->intpending = 0;
|
|---|
| 110 | sh_sigemptyset(&nsigset);
|
|---|
| 111 | sh_sigprocmask(psh, SIG_SETMASK, &nsigset, NULL);
|
|---|
| 112 | if (psh->rootshell && iflag(psh))
|
|---|
| 113 | exraise(psh, EXINT);
|
|---|
| 114 | else {
|
|---|
| 115 | sh_signal(psh, SIGINT, SH_SIG_DFL);
|
|---|
| 116 | sh_raise_sigint(psh);/*raise(psh, SIGINT);*/
|
|---|
| 117 | }
|
|---|
| 118 | /* NOTREACHED */
|
|---|
| 119 | }
|
|---|
| 120 |
|
|---|
| 121 | static void
|
|---|
| 122 | exvwarning(shinstance *psh, int sv_errno, const char *msg, va_list ap)
|
|---|
| 123 | {
|
|---|
| 124 | /* Partially emulate line buffered output so that:
|
|---|
| 125 | * printf '%d\n' 1 a 2
|
|---|
| 126 | * and
|
|---|
| 127 | * printf '%d %d %d\n' 1 a 2
|
|---|
| 128 | * both generate sensible text when stdout and stderr are merged.
|
|---|
| 129 | */
|
|---|
| 130 | if (psh->output.nextc != psh->output.buf && psh->output.nextc[-1] == '\n')
|
|---|
| 131 | flushout(&psh->output);
|
|---|
| 132 | if (psh->commandname)
|
|---|
| 133 | outfmt(&psh->errout, "%s: ", psh->commandname);
|
|---|
| 134 | if (msg != NULL) {
|
|---|
| 135 | doformat(&psh->errout, msg, ap);
|
|---|
| 136 | if (sv_errno >= 0)
|
|---|
| 137 | outfmt(&psh->errout, ": ");
|
|---|
| 138 | }
|
|---|
| 139 | if (sv_errno >= 0)
|
|---|
| 140 | outfmt(&psh->errout, "%s", sh_strerror(psh, sv_errno));
|
|---|
| 141 | out2c(psh, '\n');
|
|---|
| 142 | flushout(&psh->errout);
|
|---|
| 143 | }
|
|---|
| 144 |
|
|---|
| 145 | /*
|
|---|
| 146 | * Exverror is called to raise the error exception. If the second argument
|
|---|
| 147 | * is not NULL then error prints an error message using printf style
|
|---|
| 148 | * formatting. It then raises the error exception.
|
|---|
| 149 | */
|
|---|
| 150 | static void
|
|---|
| 151 | exverror(shinstance *psh, int cond, const char *msg, va_list ap)
|
|---|
| 152 | {
|
|---|
| 153 | CLEAR_PENDING_INT;
|
|---|
| 154 | INTOFF;
|
|---|
| 155 |
|
|---|
| 156 | #ifdef DEBUG
|
|---|
| 157 | if (msg) {
|
|---|
| 158 | va_list va2;
|
|---|
| 159 | TRACE((psh, "exverror(%d, \"", cond));
|
|---|
| 160 | va_copy(va2, ap);
|
|---|
| 161 | TRACEV((psh, msg, va2));
|
|---|
| 162 | va_end(va2);
|
|---|
| 163 | TRACE((psh, "\") pid=%d\n", sh_getpid(psh)));
|
|---|
| 164 | } else
|
|---|
| 165 | TRACE((psh, "exverror(%d, NULL) pid=%d\n", cond, sh_getpid(psh)));
|
|---|
| 166 | #endif
|
|---|
| 167 | if (msg)
|
|---|
| 168 | exvwarning(psh, -1, msg, ap);
|
|---|
| 169 |
|
|---|
| 170 | output_flushall(psh);
|
|---|
| 171 | exraise(psh, cond);
|
|---|
| 172 | /* NOTREACHED */
|
|---|
| 173 | }
|
|---|
| 174 |
|
|---|
| 175 |
|
|---|
| 176 | SH_NORETURN_1 void
|
|---|
| 177 | error(shinstance *psh, const char *msg, ...)
|
|---|
| 178 | {
|
|---|
| 179 | va_list ap;
|
|---|
| 180 |
|
|---|
| 181 | va_start(ap, msg);
|
|---|
| 182 | exverror(psh, EXERROR, msg, ap);
|
|---|
| 183 | /* NOTREACHED */
|
|---|
| 184 | va_end(ap);
|
|---|
| 185 | }
|
|---|
| 186 |
|
|---|
| 187 |
|
|---|
| 188 | SH_NORETURN_1 void
|
|---|
| 189 | exerror(shinstance *psh, int cond, const char *msg, ...)
|
|---|
| 190 | {
|
|---|
| 191 | va_list ap;
|
|---|
| 192 |
|
|---|
| 193 | va_start(ap, msg);
|
|---|
| 194 | exverror(psh, cond, msg, ap);
|
|---|
| 195 | /* NOTREACHED */
|
|---|
| 196 | va_end(ap);
|
|---|
| 197 | }
|
|---|
| 198 |
|
|---|
| 199 | /*
|
|---|
| 200 | * error/warning routines for external builtins
|
|---|
| 201 | */
|
|---|
| 202 |
|
|---|
| 203 | SH_NORETURN_1 void
|
|---|
| 204 | sh_exit(shinstance *psh, int rval)
|
|---|
| 205 | {
|
|---|
| 206 | psh->exerrno = rval & 255;
|
|---|
| 207 | exraise(psh, EXEXEC);
|
|---|
| 208 | }
|
|---|
| 209 |
|
|---|
| 210 | SH_NORETURN_1 void
|
|---|
| 211 | sh_err(shinstance *psh, int status, const char *fmt, ...)
|
|---|
| 212 | {
|
|---|
| 213 | va_list ap;
|
|---|
| 214 |
|
|---|
| 215 | va_start(ap, fmt);
|
|---|
| 216 | exvwarning(psh, errno, fmt, ap);
|
|---|
| 217 | va_end(ap);
|
|---|
| 218 | sh_exit(psh, status);
|
|---|
| 219 | }
|
|---|
| 220 |
|
|---|
| 221 | SH_NORETURN_1 void
|
|---|
| 222 | sh_verr(shinstance *psh, int status, const char *fmt, va_list ap)
|
|---|
| 223 | {
|
|---|
| 224 | exvwarning(psh, errno, fmt, ap);
|
|---|
| 225 | sh_exit(psh, status);
|
|---|
| 226 | }
|
|---|
| 227 |
|
|---|
| 228 | SH_NORETURN_1 void
|
|---|
| 229 | sh_errx(shinstance *psh, int status, const char *fmt, ...)
|
|---|
| 230 | {
|
|---|
| 231 | va_list ap;
|
|---|
| 232 |
|
|---|
| 233 | va_start(ap, fmt);
|
|---|
| 234 | exvwarning(psh, -1, fmt, ap);
|
|---|
| 235 | va_end(ap);
|
|---|
| 236 | sh_exit(psh, status);
|
|---|
| 237 | }
|
|---|
| 238 |
|
|---|
| 239 | SH_NORETURN_1 void
|
|---|
| 240 | sh_verrx(shinstance *psh, int status, const char *fmt, va_list ap)
|
|---|
| 241 | {
|
|---|
| 242 | exvwarning(psh, -1, fmt, ap);
|
|---|
| 243 | sh_exit(psh, status);
|
|---|
| 244 | }
|
|---|
| 245 |
|
|---|
| 246 | void
|
|---|
| 247 | sh_warn(shinstance *psh, const char *fmt, ...)
|
|---|
| 248 | {
|
|---|
| 249 | va_list ap;
|
|---|
| 250 |
|
|---|
| 251 | va_start(ap, fmt);
|
|---|
| 252 | exvwarning(psh, errno, fmt, ap);
|
|---|
| 253 | va_end(ap);
|
|---|
| 254 | }
|
|---|
| 255 |
|
|---|
| 256 | void
|
|---|
| 257 | sh_vwarn(shinstance *psh, const char *fmt, va_list ap)
|
|---|
| 258 | {
|
|---|
| 259 | exvwarning(psh, errno, fmt, ap);
|
|---|
| 260 | }
|
|---|
| 261 |
|
|---|
| 262 | void
|
|---|
| 263 | sh_warnx(shinstance *psh, const char *fmt, ...)
|
|---|
| 264 | {
|
|---|
| 265 | va_list ap;
|
|---|
| 266 |
|
|---|
| 267 | va_start(ap, fmt);
|
|---|
| 268 | exvwarning(psh, -1, fmt, ap);
|
|---|
| 269 | va_end(ap);
|
|---|
| 270 | }
|
|---|
| 271 |
|
|---|
| 272 | void
|
|---|
| 273 | sh_vwarnx(shinstance *psh, const char *fmt, va_list ap)
|
|---|
| 274 | {
|
|---|
| 275 | exvwarning(psh, -1, fmt, ap);
|
|---|
| 276 | }
|
|---|
| 277 |
|
|---|
| 278 |
|
|---|
| 279 | /*
|
|---|
| 280 | * Table of error messages.
|
|---|
| 281 | */
|
|---|
| 282 |
|
|---|
| 283 | struct errname {
|
|---|
| 284 | short errcode; /* error number */
|
|---|
| 285 | short action; /* operation which encountered the error */
|
|---|
| 286 | const char *msg; /* text describing the error */
|
|---|
| 287 | };
|
|---|
| 288 |
|
|---|
| 289 |
|
|---|
| 290 | #define ALL (E_OPEN|E_CREAT|E_EXEC)
|
|---|
| 291 |
|
|---|
| 292 | STATIC const struct errname errormsg[] = {
|
|---|
| 293 | { EINTR, ALL, "interrupted" },
|
|---|
| 294 | { EACCES, ALL, "permission denied" },
|
|---|
| 295 | { EIO, ALL, "I/O error" },
|
|---|
| 296 | { EEXIST, ALL, "file exists" },
|
|---|
| 297 | { ENOENT, E_OPEN, "no such file" },
|
|---|
| 298 | { ENOENT, E_CREAT,"directory nonexistent" },
|
|---|
| 299 | { ENOENT, E_EXEC, "not found" },
|
|---|
| 300 | { ENOTDIR, E_OPEN, "no such file" },
|
|---|
| 301 | { ENOTDIR, E_CREAT,"directory nonexistent" },
|
|---|
| 302 | { ENOTDIR, E_EXEC, "not found" },
|
|---|
| 303 | { EISDIR, ALL, "is a directory" },
|
|---|
| 304 | #ifdef EMFILE
|
|---|
| 305 | { EMFILE, ALL, "too many open files" },
|
|---|
| 306 | #endif
|
|---|
| 307 | { ENFILE, ALL, "file table overflow" },
|
|---|
| 308 | { ENOSPC, ALL, "file system full" },
|
|---|
| 309 | #ifdef EDQUOT
|
|---|
| 310 | { EDQUOT, ALL, "disk quota exceeded" },
|
|---|
| 311 | #endif
|
|---|
| 312 | #ifdef ENOSR
|
|---|
| 313 | { ENOSR, ALL, "no streams resources" },
|
|---|
| 314 | #endif
|
|---|
| 315 | { ENXIO, ALL, "no such device or address" },
|
|---|
| 316 | { EROFS, ALL, "read-only file system" },
|
|---|
| 317 | #ifdef ETXTBSY
|
|---|
| 318 | { ETXTBSY, ALL, "text busy" },
|
|---|
| 319 | #endif
|
|---|
| 320 | #ifdef EAGAIN
|
|---|
| 321 | { EAGAIN, E_EXEC, "not enough memory" },
|
|---|
| 322 | #endif
|
|---|
| 323 | { ENOMEM, ALL, "not enough memory" },
|
|---|
| 324 | #ifdef ENOLINK
|
|---|
| 325 | { ENOLINK, ALL, "remote access failed" },
|
|---|
| 326 | #endif
|
|---|
| 327 | #ifdef EMULTIHOP
|
|---|
| 328 | { EMULTIHOP, ALL, "remote access failed" },
|
|---|
| 329 | #endif
|
|---|
| 330 | #ifdef ECOMM
|
|---|
| 331 | { ECOMM, ALL, "remote access failed" },
|
|---|
| 332 | #endif
|
|---|
| 333 | #ifdef ESTALE
|
|---|
| 334 | { ESTALE, ALL, "remote access failed" },
|
|---|
| 335 | #endif
|
|---|
| 336 | #ifdef ETIMEDOUT
|
|---|
| 337 | { ETIMEDOUT, ALL, "remote access failed" },
|
|---|
| 338 | #endif
|
|---|
| 339 | #ifdef ELOOP
|
|---|
| 340 | { ELOOP, ALL, "symbolic link loop" },
|
|---|
| 341 | #endif
|
|---|
| 342 | { E2BIG, E_EXEC, "argument list too long" },
|
|---|
| 343 | #ifdef ELIBACC
|
|---|
| 344 | { ELIBACC, E_EXEC, "shared library missing" },
|
|---|
| 345 | #endif
|
|---|
| 346 | { 0, 0, NULL },
|
|---|
| 347 | };
|
|---|
| 348 |
|
|---|
| 349 |
|
|---|
| 350 | /*
|
|---|
| 351 | * Return a string describing an error. The returned string may be a
|
|---|
| 352 | * pointer to a static buffer that will be overwritten on the next call.
|
|---|
| 353 | * Action describes the operation that got the error.
|
|---|
| 354 | */
|
|---|
| 355 |
|
|---|
| 356 | const char *
|
|---|
| 357 | errmsg(shinstance *psh, int e, int action)
|
|---|
| 358 | {
|
|---|
| 359 | struct errname const *ep;
|
|---|
| 360 | /*static char buf[12];*/
|
|---|
| 361 |
|
|---|
| 362 | for (ep = errormsg ; ep->errcode ; ep++) {
|
|---|
| 363 | if (ep->errcode == e && (ep->action & action) != 0)
|
|---|
| 364 | return ep->msg;
|
|---|
| 365 | }
|
|---|
| 366 | fmtstr(psh->errmsg_buf, sizeof psh->errmsg_buf, "error %d", e);
|
|---|
| 367 | return psh->errmsg_buf;
|
|---|
| 368 | }
|
|---|
