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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [string/] [strerror.c] - Blame information for rev 57

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1 39 lampret 
/***
2 
**** CAUTION!!! KEEP DOC CONSISTENT---if you change text of a message
3 
****            here, change two places:
4 
****            1) the leading doc section (alphabetized by macro)
5 
****            2) the real text inside switch(errnum)
6 
***/
7 
 
8 
/*
9 
FUNCTION
10 
        <<strerror>>---convert error number to string
11 
 
12 
INDEX
13 
        strerror
14 
 
15 
ANSI_SYNOPSIS
16 
        #include <string.h>
17 
        char *strerror(int <[errnum]>);
18 
 
19 
TRAD_SYNOPSIS
20 
        #include <string.h>
21 
        char *strerror(<[errnum]>)
22 
        int <[errnum]>;
23 
 
24 
DESCRIPTION
25 
<<strerror>> converts the error number <[errnum]> into a
26 
string.  The value of <[errnum]> is usually a copy of <<errno>>.
27 
If <<errnum>> is not a known error number, the result points to an
28 
empty string.
29 
 
30 
This implementation of <<strerror>> prints out the following strings
31 
for each of the values defined in `<<errno.h>>':
32 
 
33 
o+
34 
o E2BIG
35 
Arg list too long
36 
 
37 
o EACCES
38 
Permission denied
39 
 
40 
o EADV
41 
Advertise error
42 
 
43 
o EAGAIN
44 
No more processes
45 
 
46 
o EBADF
47 
Bad file number
48 
 
49 
o EBADMSG
50 
Bad message
51 
 
52 
o EBUSY
53 
Device or resource busy
54 
 
55 
o ECHILD
56 
No children
57 
 
58 
o ECOMM
59 
Communication error
60 
 
61 
o EDEADLK
62 
Deadlock
63 
 
64 
o EEXIST
65 
File exists
66 
 
67 
o EDOM
68 
Math argument
69 
 
70 
o EFAULT
71 
Bad address
72 
 
73 
o EFBIG
74 
File too large
75 
 
76 
o EIDRM
77 
Identifier removed
78 
 
79 
o EINTR
80 
Interrupted system call
81 
 
82 
o EINVAL
83 
Invalid argument
84 
 
85 
o EIO
86 
I/O error
87 
 
88 
o EISDIR
89 
Is a directory
90 
 
91 
o ELIBACC
92 
Cannot access a needed shared library
93 
 
94 
o ELIBBAD
95 
Accessing a corrupted shared library
96 
 
97 
o ELIBEXEC
98 
Cannot exec a shared library directly
99 
 
100 
o ELIBMAX
101 
Attempting to link in more shared libraries than system limit
102 
 
103 
o ELIBSCN
104 
<<.lib>> section in a.out corrupted
105 
 
106 
o EMFILE
107 
Too many open files
108 
 
109 
o EMLINK
110 
Too many links
111 
 
112 
o EMULTIHOP
113 
Multihop attempted
114 
 
115 
o ENAMETOOLONG
116 
File or path name too long
117 
 
118 
o ENFILE
119 
Too many open files in system
120 
 
121 
o ENODEV
122 
No such device
123 
 
124 
o ENOENT
125 
No such file or directory
126 
 
127 
o ENOEXEC
128 
Exec format error
129 
 
130 
o ENOLCK
131 
No lock
132 
 
133 
o ENOLINK
134 
Virtual circuit is gone
135 
 
136 
o ENOMEM
137 
Not enough space
138 
 
139 
o ENOMSG
140 
No message of desired type
141 
 
142 
o ENONET
143 
Machine is not on the network
144 
 
145 
o ENOPKG
146 
No package
147 
 
148 
o ENOSPC
149 
No space left on device
150 
 
151 
o ENOSR
152 
No stream resources
153 
 
154 
o ENOSTR
155 
Not a stream
156 
 
157 
o ENOSYS
158 
Function not implemented
159 
 
160 
o ENOTBLK
161 
Block device required
162 
 
163 
o ENOTDIR
164 
Not a directory
165 
 
166 
o ENOTEMPTY
167 
Directory not empty
168 
 
169 
o ENOTTY
170 
Not a character device
171 
 
172 
o ENXIO
173 
No such device or address
174 
 
175 
o EPERM
176 
Not owner
177 
 
178 
o EPIPE
179 
Broken pipe
180 
 
181 
o EPROTO
182 
Protocol error
183 
 
184 
o ERANGE
185 
Result too large
186 
 
187 
o EREMOTE
188 
Resource is remote
189 
 
190 
o EROFS
191 
Read-only file system
192 
 
193 
o ESPIPE
194 
Illegal seek
195 
 
196 
o ESRCH
197 
No such process
198 
 
199 
o ESRMNT
200 
Srmount error
201 
 
202 
o ETIME
203 
Stream ioctl timeout
204 
 
205 
o ETXTBSY
206 
Text file busy
207 
 
208 
o EXDEV
209 
Cross-device link
210 
 
211 
o-
212 
 
213 
RETURNS
214 
This function returns a pointer to a string.  Your application must
215 
not modify that string.
216 
 
217 
PORTABILITY
218 
ANSI C requires <<strerror>>, but does not specify the strings used
219 
for each error number.
220 
 
221 
Although this implementation of <<strerror>> is reentrant, ANSI C
222 
declares that subsequent calls to <<strerror>> may overwrite the
223 
result string; therefore portable code cannot depend on the reentrancy
224 
of this subroutine.
225 
 
226 
This implementation of <<strerror>> provides for user-defined
227 
extensibility.  <<errno.h>> defines <[__ELASTERROR]>, which can be
228 
used as a base for user-defined error values.  If the user supplies a
229 
routine named <<_user_strerror>>, and <[errnum]> passed to
230 
<<strerror>> does not match any of the supported values,
231 
<<_user_strerror>> is called with <[errnum]> as its argument.
232 
 
233 
<<_user_strerror>> takes one argument of type <[int]>, and returns a
234 
character pointer.  If <[errnum]> is unknown to <<_user_strerror>>,
235 
<<_user_strerror>> returns <[NULL]>.  The default <<_user_strerror>>
236 
returns <[NULL]> for all input values.
237 
 
238 
<<strerror>> requires no supporting OS subroutines.
239 
 
240 
QUICKREF
241 
        strerror ansi pure
242 
*/
243 
 
244 
#include <errno.h>
245 
#include <string.h>
246 
 
247 
char *
248 
_DEFUN (strerror, (errnum),
249 
        int errnum)
250 
{
251 
  char *error;
252 
  extern char *_user_strerror _PARAMS ((int));
253 
 
254 
  switch (errnum)
255 
    {
256 
/* go32 defines EPERM as EACCES */
257 
#if defined (EPERM) && (!defined (EACCES) || (EPERM != EACCES))
258 
    case EPERM:
259 
      error = "Not owner";
260 
      break;
261 
#endif
262 
#ifdef ENOENT
263 
    case ENOENT:
264 
      error = "No such file or directory";
265 
      break;
266 
#endif
267 
#ifdef ESRCH
268 
    case ESRCH:
269 
      error = "No such process";
270 
      break;
271 
#endif
272 
#ifdef EINTR
273 
    case EINTR:
274 
      error = "Interrupted system call";
275 
      break;
276 
#endif
277 
#ifdef EIO
278 
    case EIO:
279 
      error = "I/O error";
280 
      break;
281 
#endif
282 
/* go32 defines ENXIO as ENODEV */
283 
#if defined (ENXIO) && (!defined (ENODEV) || (ENXIO != ENODEV))
284 
    case ENXIO:
285 
      error = "No such device or address";
286 
      break;
287 
#endif
288 
#ifdef E2BIG
289 
    case E2BIG:
290 
      error = "Arg list too long";
291 
      break;
292 
#endif
293 
#ifdef ENOEXEC
294 
    case ENOEXEC:
295 
      error = "Exec format error";
296 
      break;
297 
#endif
298 
#ifdef EBADF
299 
    case EBADF:
300 
      error = "Bad file number";
301 
      break;
302 
#endif
303 
#ifdef ECHILD
304 
    case ECHILD:
305 
      error = "No children";
306 
      break;
307 
#endif
308 
#ifdef EAGAIN
309 
    case EAGAIN:
310 
      error = "No more processes";
311 
      break;
312 
#endif
313 
#ifdef ENOMEM
314 
    case ENOMEM:
315 
      error = "Not enough space";
316 
      break;
317 
#endif
318 
#ifdef EACCES
319 
    case EACCES:
320 
      error = "Permission denied";
321 
      break;
322 
#endif
323 
#ifdef EFAULT
324 
    case EFAULT:
325 
      error = "Bad address";
326 
      break;
327 
#endif
328 
#ifdef ENOTBLK
329 
    case ENOTBLK:
330 
      error = "Block device required";
331 
      break;
332 
#endif
333 
#ifdef EBUSY
334 
    case EBUSY:
335 
      error = "Device or resource busy";
336 
      break;
337 
#endif
338 
#ifdef EEXIST
339 
    case EEXIST:
340 
      error = "File exists";
341 
      break;
342 
#endif
343 
#ifdef EXDEV
344 
    case EXDEV:
345 
      error = "Cross-device link";
346 
      break;
347 
#endif
348 
#ifdef ENODEV
349 
    case ENODEV:
350 
      error = "No such device";
351 
      break;
352 
#endif
353 
#ifdef ENOTDIR
354 
    case ENOTDIR:
355 
      error = "Not a directory";
356 
      break;
357 
#endif
358 
#ifdef EISDIR
359 
    case EISDIR:
360 
      error = "Is a directory";
361 
      break;
362 
#endif
363 
#ifdef EINVAL
364 
    case EINVAL:
365 
      error = "Invalid argument";
366 
      break;
367 
#endif
368 
#ifdef ENFILE
369 
    case ENFILE:
370 
      error = "Too many open files in system";
371 
      break;
372 
#endif
373 
#ifdef EMFILE
374 
    case EMFILE:
375 
      error = "Too many open files";
376 
      break;
377 
#endif
378 
#ifdef ENOTTY
379 
    case ENOTTY:
380 
      error = "Not a character device";
381 
      break;
382 
#endif
383 
#ifdef ETXTBSY
384 
    case ETXTBSY:
385 
      error = "Text file busy";
386 
      break;
387 
#endif
388 
#ifdef EFBIG
389 
    case EFBIG:
390 
      error = "File too large";
391 
      break;
392 
#endif
393 
#ifdef ENOSPC
394 
    case ENOSPC:
395 
      error = "No space left on device";
396 
      break;
397 
#endif
398 
#ifdef ESPIPE
399 
    case ESPIPE:
400 
      error = "Illegal seek";
401 
      break;
402 
#endif
403 
#ifdef EROFS
404 
    case EROFS:
405 
      error = "Read-only file system";
406 
      break;
407 
#endif
408 
#ifdef EMLINK
409 
    case EMLINK:
410 
      error = "Too many links";
411 
      break;
412 
#endif
413 
#ifdef EPIPE
414 
    case EPIPE:
415 
      error = "Broken pipe";
416 
      break;
417 
#endif
418 
#ifdef EDOM
419 
    case EDOM:
420 
      error = "Math argument";
421 
      break;
422 
#endif
423 
#ifdef ERANGE
424 
    case ERANGE:
425 
      error = "Result too large";
426 
      break;
427 
#endif
428 
#ifdef ENOMSG
429 
    case ENOMSG:
430 
      error = "No message of desired type";
431 
      break;
432 
#endif
433 
#ifdef EIDRM
434 
    case EIDRM:
435 
      error = "Identifier removed";
436 
      break;
437 
#endif
438 
#ifdef EDEADLK
439 
    case EDEADLK:
440 
      error = "Deadlock";
441 
      break;
442 
#endif
443 
#ifdef ENOLCK
444 
    case ENOLCK:
445 
      error = "No lock";
446 
      break;
447 
#endif
448 
#ifdef ENOSTR
449 
    case ENOSTR:
450 
      error = "Not a stream";
451 
      break;
452 
#endif
453 
#ifdef ETIME
454 
    case ETIME:
455 
      error = "Stream ioctl timeout";
456 
      break;
457 
#endif
458 
#ifdef ENOSR
459 
    case ENOSR:
460 
      error = "No stream resources";
461 
      break;
462 
#endif
463 
#ifdef ENONET
464 
    case ENONET:
465 
      error = "Machine is not on the network";
466 
      break;
467 
#endif
468 
#ifdef ENOPKG
469 
    case ENOPKG:
470 
      error = "No package";
471 
      break;
472 
#endif
473 
#ifdef EREMOTE
474 
    case EREMOTE:
475 
      error = "Resource is remote";
476 
      break;
477 
#endif
478 
#ifdef ENOLINK
479 
    case ENOLINK:
480 
      error = "Virtual circuit is gone";
481 
      break;
482 
#endif
483 
#ifdef EADV
484 
    case EADV:
485 
      error = "Advertise error";
486 
      break;
487 
#endif
488 
#ifdef ESRMNT
489 
    case ESRMNT:
490 
      error = "Srmount error";
491 
      break;
492 
#endif
493 
#ifdef ECOMM
494 
    case ECOMM:
495 
      error = "Communication error";
496 
      break;
497 
#endif
498 
#ifdef EPROTO
499 
    case EPROTO:
500 
      error = "Protocol error";
501 
      break;
502 
#endif
503 
#ifdef EMULTIHOP
504 
    case EMULTIHOP:
505 
      error = "Multihop attempted";
506 
      break;
507 
#endif
508 
#ifdef EBADMSG
509 
    case EBADMSG:
510 
      error = "Bad message";
511 
      break;
512 
#endif
513 
#ifdef ELIBACC
514 
    case ELIBACC:
515 
      error = "Cannot access a needed shared library";
516 
      break;
517 
#endif
518 
#ifdef ELIBBAD
519 
    case ELIBBAD:
520 
      error = "Accessing a corrupted shared library";
521 
      break;
522 
#endif
523 
#ifdef ELIBSCN
524 
    case ELIBSCN:
525 
      error = ".lib section in a.out corrupted";
526 
      break;
527 
#endif
528 
#ifdef ELIBMAX
529 
    case ELIBMAX:
530 
      error = "Attempting to link in more shared libraries than system limit";
531 
      break;
532 
#endif
533 
#ifdef ELIBEXEC
534 
    case ELIBEXEC:
535 
      error = "Cannot exec a shared library directly";
536 
      break;
537 
#endif
538 
#ifdef ENOSYS
539 
    case ENOSYS:
540 
      error = "Function not implemented";
541 
      break;
542 
#endif
543 
#ifdef ENMFILE
544 
    case ENMFILE:
545 
      error = "No more files";
546 
      break;
547 
#endif
548 
#ifdef ENOTEMPTY
549 
    case ENOTEMPTY:
550 
      error = "Directory not empty";
551 
      break;
552 
#endif
553 
#ifdef ENAMETOOLONG
554 
    case ENAMETOOLONG:
555 
      error = "File or path name too long";
556 
      break;
557 
#endif
558 
#ifdef ELOOP
559 
    case ELOOP:
560 
      error = "Too many symbolic links";
561 
      break;
562 
#endif
563 
#ifdef ENOBUFS
564 
    case ENOBUFS:
565 
      error = "No buffer space available";
566 
      break;
567 
#endif
568 
#ifdef EAFNOSUPPORT
569 
    case EAFNOSUPPORT:
570 
      error = "Address family not supported by protocol family";
571 
      break;
572 
#endif
573 
#ifdef EPROTOTYPE
574 
    case EPROTOTYPE:
575 
      error = "Protocol wrong type for socket";
576 
      break;
577 
#endif
578 
#ifdef ENOTSOCK
579 
    case ENOTSOCK:
580 
      error = "Socket operation on non-socket";
581 
      break;
582 
#endif
583 
#ifdef ENOPROTOOPT
584 
    case ENOPROTOOPT:
585 
      error = "Protocol not available";
586 
      break;
587 
#endif
588 
#ifdef ESHUTDOWN
589 
    case ESHUTDOWN:
590 
      error = "Can't send after socket shutdown";
591 
      break;
592 
#endif
593 
#ifdef ECONNREFUSED
594 
    case ECONNREFUSED:
595 
      error = "Connection refused";
596 
      break;
597 
#endif
598 
#ifdef EADDRINUSE
599 
    case EADDRINUSE:
600 
      error = "Address already in use";
601 
      break;
602 
#endif
603 
#ifdef ECONNABORTED
604 
    case ECONNABORTED:
605 
      error = "Software caused connection abort";
606 
      break;
607 
#endif
608 56 joel 
#if (defined(EWOULDBLOCK) && (!defined (EAGAIN) || (EWOULDBLOCK != EAGAIN)))
609 
    case EWOULDBLOCK:
610 
        error = "Operation would block";
611 
        break;
612 
#endif
613 
#ifdef ENOTCONN
614 
    case ENOTCONN:
615 
        error = "Socket is not connected";
616 
        break;
617 
#endif
618 
#ifdef ESOCKTNOSUPPORT
619 
    case ESOCKTNOSUPPORT:
620 
        error = "Socket type not supported";
621 
        break;
622 
#endif
623 
#ifdef EISCONN
624 
    case EISCONN:
625 
        error = "Socket is already connected";
626 
        break;
627 
#endif
628 
#ifdef EOPNOTSUPP
629 
    case EOPNOTSUPP:
630 
        error = "Operation not supported on socket";
631 
        break;
632 
#endif
633 
#ifdef EMSGSIZE
634 
    case EMSGSIZE:
635 
        error = "Message too long";
636 
        break;
637 
#endif
638 
#ifdef ETIMEDOUT
639 
    case ETIMEDOUT:
640 
        error = "Connection timed out";
641 
        break;
642 
#endif
643 39 lampret 
    default:
644 
      if ((error = _user_strerror (errnum)) == 0)
645 
        error = "";
646 
      break;
647 
    }
648 
 
649 
  return error;
650 
}

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