| 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 | #ifdef HAVE_SYS_CDEFS_H
|
|---|
| 36 | #include <sys/cdefs.h>
|
|---|
| 37 | #endif
|
|---|
| 38 | #ifndef lint
|
|---|
| 39 | #if 0
|
|---|
| 40 | static char sccsid[] = "@(#)error.c 8.2 (Berkeley) 5/4/95";
|
|---|
| 41 | #else
|
|---|
| 42 | __RCSID("$NetBSD: error.c,v 1.31 2003/08/07 09:05:30 agc Exp $");
|
|---|
| 43 | #endif
|
|---|
| 44 | #endif /* not lint */
|
|---|
| 45 |
|
|---|
| 46 | /*
|
|---|
| 47 | * Errors and exceptions.
|
|---|
| 48 | */
|
|---|
| 49 |
|
|---|
| 50 | #include <signal.h>
|
|---|
| 51 | #include <stdlib.h>
|
|---|
| 52 | #include <unistd.h>
|
|---|
| 53 | #include <errno.h>
|
|---|
| 54 | #include <stdio.h>
|
|---|
| 55 | #include <string.h>
|
|---|
| 56 |
|
|---|
| 57 | #include "shell.h"
|
|---|
| 58 | #include "main.h"
|
|---|
| 59 | #include "options.h"
|
|---|
| 60 | #include "output.h"
|
|---|
| 61 | #include "error.h"
|
|---|
| 62 | #include "show.h"
|
|---|
| 63 |
|
|---|
| 64 |
|
|---|
| 65 | /*
|
|---|
| 66 | * Code to handle exceptions in C.
|
|---|
| 67 | */
|
|---|
| 68 |
|
|---|
| 69 | struct jmploc *handler;
|
|---|
| 70 | int exception;
|
|---|
| 71 | volatile int suppressint;
|
|---|
| 72 | volatile int intpending;
|
|---|
| 73 | char *commandname;
|
|---|
| 74 |
|
|---|
| 75 |
|
|---|
| 76 | static void exverror(int, const char *, va_list)
|
|---|
| 77 | __attribute__((__noreturn__));
|
|---|
| 78 |
|
|---|
| 79 | /*
|
|---|
| 80 | * Called to raise an exception. Since C doesn't include exceptions, we
|
|---|
| 81 | * just do a longjmp to the exception handler. The type of exception is
|
|---|
| 82 | * stored in the global variable "exception".
|
|---|
| 83 | */
|
|---|
| 84 |
|
|---|
| 85 | void
|
|---|
| 86 | exraise(int e)
|
|---|
| 87 | {
|
|---|
| 88 | if (handler == NULL)
|
|---|
| 89 | abort();
|
|---|
| 90 | exception = e;
|
|---|
| 91 | longjmp(handler->loc, 1);
|
|---|
| 92 | }
|
|---|
| 93 |
|
|---|
| 94 |
|
|---|
| 95 | /*
|
|---|
| 96 | * Called from trap.c when a SIGINT is received. (If the user specifies
|
|---|
| 97 | * that SIGINT is to be trapped or ignored using the trap builtin, then
|
|---|
| 98 | * this routine is not called.) Suppressint is nonzero when interrupts
|
|---|
| 99 | * are held using the INTOFF macro. The call to _exit is necessary because
|
|---|
| 100 | * there is a short period after a fork before the signal handlers are
|
|---|
| 101 | * set to the appropriate value for the child. (The test for iflag is
|
|---|
| 102 | * just defensive programming.)
|
|---|
| 103 | */
|
|---|
| 104 |
|
|---|
| 105 | void
|
|---|
| 106 | onint(void)
|
|---|
| 107 | {
|
|---|
| 108 | sigset_t nsigset;
|
|---|
| 109 |
|
|---|
| 110 | if (suppressint) {
|
|---|
| 111 | intpending = 1;
|
|---|
| 112 | return;
|
|---|
| 113 | }
|
|---|
| 114 | intpending = 0;
|
|---|
| 115 | sigemptyset(&nsigset);
|
|---|
| 116 | sigprocmask(SIG_SETMASK, &nsigset, NULL);
|
|---|
| 117 | if (rootshell && iflag)
|
|---|
| 118 | exraise(EXINT);
|
|---|
| 119 | else {
|
|---|
| 120 | signal(SIGINT, SIG_DFL);
|
|---|
| 121 | raise(SIGINT);
|
|---|
| 122 | }
|
|---|
| 123 | /* NOTREACHED */
|
|---|
| 124 | }
|
|---|
| 125 |
|
|---|
| 126 | static void
|
|---|
| 127 | exvwarning(int sv_errno, const char *msg, va_list ap)
|
|---|
| 128 | {
|
|---|
| 129 | /* Partially emulate line buffered output so that:
|
|---|
| 130 | * printf '%d\n' 1 a 2
|
|---|
| 131 | * and
|
|---|
| 132 | * printf '%d %d %d\n' 1 a 2
|
|---|
| 133 | * both generate sensible text when stdout and stderr are merged.
|
|---|
| 134 | */
|
|---|
| 135 | if (output.nextc != output.buf && output.nextc[-1] == '\n')
|
|---|
| 136 | flushout(&output);
|
|---|
| 137 | if (commandname)
|
|---|
| 138 | outfmt(&errout, "%s: ", commandname);
|
|---|
| 139 | if (msg != NULL) {
|
|---|
| 140 | doformat(&errout, msg, ap);
|
|---|
| 141 | if (sv_errno >= 0)
|
|---|
| 142 | outfmt(&errout, ": ");
|
|---|
| 143 | }
|
|---|
| 144 | if (sv_errno >= 0)
|
|---|
| 145 | outfmt(&errout, "%s", strerror(sv_errno));
|
|---|
| 146 | out2c('\n');
|
|---|
| 147 | flushout(&errout);
|
|---|
| 148 | }
|
|---|
| 149 |
|
|---|
| 150 | /*
|
|---|
| 151 | * Exverror is called to raise the error exception. If the second argument
|
|---|
| 152 | * is not NULL then error prints an error message using printf style
|
|---|
| 153 | * formatting. It then raises the error exception.
|
|---|
| 154 | */
|
|---|
| 155 | static void
|
|---|
| 156 | exverror(int cond, const char *msg, va_list ap)
|
|---|
| 157 | {
|
|---|
| 158 | CLEAR_PENDING_INT;
|
|---|
| 159 | INTOFF;
|
|---|
| 160 |
|
|---|
| 161 | #ifdef DEBUG
|
|---|
| 162 | if (msg) {
|
|---|
| 163 | TRACE(("exverror(%d, \"", cond));
|
|---|
| 164 | TRACEV((msg, ap));
|
|---|
| 165 | TRACE(("\") pid=%d\n", getpid()));
|
|---|
| 166 | } else
|
|---|
| 167 | TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
|
|---|
| 168 | #endif
|
|---|
| 169 | if (msg)
|
|---|
| 170 | exvwarning(-1, msg, ap);
|
|---|
| 171 |
|
|---|
| 172 | output_flushall();
|
|---|
| 173 | exraise(cond);
|
|---|
| 174 | /* NOTREACHED */
|
|---|
| 175 | }
|
|---|
| 176 |
|
|---|
| 177 |
|
|---|
| 178 | void
|
|---|
| 179 | error(const char *msg, ...)
|
|---|
| 180 | {
|
|---|
| 181 | va_list ap;
|
|---|
| 182 |
|
|---|
| 183 | va_start(ap, msg);
|
|---|
| 184 | exverror(EXERROR, msg, ap);
|
|---|
| 185 | /* NOTREACHED */
|
|---|
| 186 | va_end(ap);
|
|---|
| 187 | }
|
|---|
| 188 |
|
|---|
| 189 |
|
|---|
| 190 | void
|
|---|
| 191 | exerror(int cond, const char *msg, ...)
|
|---|
| 192 | {
|
|---|
| 193 | va_list ap;
|
|---|
| 194 |
|
|---|
| 195 | va_start(ap, msg);
|
|---|
| 196 | exverror(cond, msg, ap);
|
|---|
| 197 | /* NOTREACHED */
|
|---|
| 198 | va_end(ap);
|
|---|
| 199 | }
|
|---|
| 200 |
|
|---|
| 201 | /*
|
|---|
| 202 | * error/warning routines for external builtins
|
|---|
| 203 | */
|
|---|
| 204 |
|
|---|
| 205 | void
|
|---|
| 206 | sh_exit(int rval)
|
|---|
| 207 | {
|
|---|
| 208 | exerrno = rval & 255;
|
|---|
| 209 | exraise(EXEXEC);
|
|---|
| 210 | }
|
|---|
| 211 |
|
|---|
| 212 | void
|
|---|
| 213 | sh_err(int status, const char *fmt, ...)
|
|---|
| 214 | {
|
|---|
| 215 | va_list ap;
|
|---|
| 216 |
|
|---|
| 217 | va_start(ap, fmt);
|
|---|
| 218 | exvwarning(errno, fmt, ap);
|
|---|
| 219 | va_end(ap);
|
|---|
| 220 | sh_exit(status);
|
|---|
| 221 | }
|
|---|
| 222 |
|
|---|
| 223 | void
|
|---|
| 224 | sh_verr(int status, const char *fmt, va_list ap)
|
|---|
| 225 | {
|
|---|
| 226 | exvwarning(errno, fmt, ap);
|
|---|
| 227 | sh_exit(status);
|
|---|
| 228 | }
|
|---|
| 229 |
|
|---|
| 230 | void
|
|---|
| 231 | sh_errx(int status, const char *fmt, ...)
|
|---|
| 232 | {
|
|---|
| 233 | va_list ap;
|
|---|
| 234 |
|
|---|
| 235 | va_start(ap, fmt);
|
|---|
| 236 | exvwarning(-1, fmt, ap);
|
|---|
| 237 | va_end(ap);
|
|---|
| 238 | sh_exit(status);
|
|---|
| 239 | }
|
|---|
| 240 |
|
|---|
| 241 | void
|
|---|
| 242 | sh_verrx(int status, const char *fmt, va_list ap)
|
|---|
| 243 | {
|
|---|
| 244 | exvwarning(-1, fmt, ap);
|
|---|
| 245 | sh_exit(status);
|
|---|
| 246 | }
|
|---|
| 247 |
|
|---|
| 248 | void
|
|---|
| 249 | sh_warn(const char *fmt, ...)
|
|---|
| 250 | {
|
|---|
| 251 | va_list ap;
|
|---|
| 252 |
|
|---|
| 253 | va_start(ap, fmt);
|
|---|
| 254 | exvwarning(errno, fmt, ap);
|
|---|
| 255 | va_end(ap);
|
|---|
| 256 | }
|
|---|
| 257 |
|
|---|
| 258 | void
|
|---|
| 259 | sh_vwarn(const char *fmt, va_list ap)
|
|---|
| 260 | {
|
|---|
| 261 | exvwarning(errno, fmt, ap);
|
|---|
| 262 | }
|
|---|
| 263 |
|
|---|
| 264 | void
|
|---|
| 265 | sh_warnx(const char *fmt, ...)
|
|---|
| 266 | {
|
|---|
| 267 | va_list ap;
|
|---|
| 268 |
|
|---|
| 269 | va_start(ap, fmt);
|
|---|
| 270 | exvwarning(-1, fmt, ap);
|
|---|
| 271 | va_end(ap);
|
|---|
| 272 | }
|
|---|
| 273 |
|
|---|
| 274 | void
|
|---|
| 275 | sh_vwarnx(const char *fmt, va_list ap)
|
|---|
| 276 | {
|
|---|
| 277 | exvwarning(-1, fmt, ap);
|
|---|
| 278 | }
|
|---|
| 279 |
|
|---|
| 280 |
|
|---|
| 281 | /*
|
|---|
| 282 | * Table of error messages.
|
|---|
| 283 | */
|
|---|
| 284 |
|
|---|
| 285 | struct errname {
|
|---|
| 286 | short errcode; /* error number */
|
|---|
| 287 | short action; /* operation which encountered the error */
|
|---|
| 288 | const char *msg; /* text describing the error */
|
|---|
| 289 | };
|
|---|
| 290 |
|
|---|
| 291 |
|
|---|
| 292 | #define ALL (E_OPEN|E_CREAT|E_EXEC)
|
|---|
| 293 |
|
|---|
| 294 | STATIC const struct errname errormsg[] = {
|
|---|
| 295 | { EINTR, ALL, "interrupted" },
|
|---|
| 296 | { EACCES, ALL, "permission denied" },
|
|---|
| 297 | { EIO, ALL, "I/O error" },
|
|---|
| 298 | { EEXIST, ALL, "file exists" },
|
|---|
| 299 | { ENOENT, E_OPEN, "no such file" },
|
|---|
| 300 | { ENOENT, E_CREAT,"directory nonexistent" },
|
|---|
| 301 | { ENOENT, E_EXEC, "not found" },
|
|---|
| 302 | { ENOTDIR, E_OPEN, "no such file" },
|
|---|
| 303 | { ENOTDIR, E_CREAT,"directory nonexistent" },
|
|---|
| 304 | { ENOTDIR, E_EXEC, "not found" },
|
|---|
| 305 | { EISDIR, ALL, "is a directory" },
|
|---|
| 306 | #ifdef EMFILE
|
|---|
| 307 | { EMFILE, ALL, "too many open files" },
|
|---|
| 308 | #endif
|
|---|
| 309 | { ENFILE, ALL, "file table overflow" },
|
|---|
| 310 | { ENOSPC, ALL, "file system full" },
|
|---|
| 311 | #ifdef EDQUOT
|
|---|
| 312 | { EDQUOT, ALL, "disk quota exceeded" },
|
|---|
| 313 | #endif
|
|---|
| 314 | #ifdef ENOSR
|
|---|
| 315 | { ENOSR, ALL, "no streams resources" },
|
|---|
| 316 | #endif
|
|---|
| 317 | { ENXIO, ALL, "no such device or address" },
|
|---|
| 318 | { EROFS, ALL, "read-only file system" },
|
|---|
| 319 | #ifdef ETXTBSY
|
|---|
| 320 | { ETXTBSY, ALL, "text busy" },
|
|---|
| 321 | #endif
|
|---|
| 322 | #ifdef EAGAIN
|
|---|
| 323 | { EAGAIN, E_EXEC, "not enough memory" },
|
|---|
| 324 | #endif
|
|---|
| 325 | { ENOMEM, ALL, "not enough memory" },
|
|---|
| 326 | #ifdef ENOLINK
|
|---|
| 327 | { ENOLINK, ALL, "remote access failed" },
|
|---|
| 328 | #endif
|
|---|
| 329 | #ifdef EMULTIHOP
|
|---|
| 330 | { EMULTIHOP, ALL, "remote access failed" },
|
|---|
| 331 | #endif
|
|---|
| 332 | #ifdef ECOMM
|
|---|
| 333 | { ECOMM, ALL, "remote access failed" },
|
|---|
| 334 | #endif
|
|---|
| 335 | #ifdef ESTALE
|
|---|
| 336 | { ESTALE, ALL, "remote access failed" },
|
|---|
| 337 | #endif
|
|---|
| 338 | #ifdef ETIMEDOUT
|
|---|
| 339 | { ETIMEDOUT, ALL, "remote access failed" },
|
|---|
| 340 | #endif
|
|---|
| 341 | #ifdef ELOOP
|
|---|
| 342 | { ELOOP, ALL, "symbolic link loop" },
|
|---|
| 343 | #endif
|
|---|
| 344 | { E2BIG, E_EXEC, "argument list too long" },
|
|---|
| 345 | #ifdef ELIBACC
|
|---|
| 346 | { ELIBACC, E_EXEC, "shared library missing" },
|
|---|
| 347 | #endif
|
|---|
| 348 | { 0, 0, NULL },
|
|---|
| 349 | };
|
|---|
| 350 |
|
|---|
| 351 |
|
|---|
| 352 | /*
|
|---|
| 353 | * Return a string describing an error. The returned string may be a
|
|---|
| 354 | * pointer to a static buffer that will be overwritten on the next call.
|
|---|
| 355 | * Action describes the operation that got the error.
|
|---|
| 356 | */
|
|---|
| 357 |
|
|---|
| 358 | const char *
|
|---|
| 359 | errmsg(int e, int action)
|
|---|
| 360 | {
|
|---|
| 361 | struct errname const *ep;
|
|---|
| 362 | static char buf[12];
|
|---|
| 363 |
|
|---|
| 364 | for (ep = errormsg ; ep->errcode ; ep++) {
|
|---|
| 365 | if (ep->errcode == e && (ep->action & action) != 0)
|
|---|
| 366 | return ep->msg;
|
|---|
| 367 | }
|
|---|
| 368 | fmtstr(buf, sizeof buf, "error %d", e);
|
|---|
| 369 | return buf;
|
|---|
| 370 | }
|
|---|
