]>
Commit | Line | Data |
---|---|---|
d66e34cd | 1 | /* dlerror -- Return error detail for failing <dlfcn.h> functions. |
dcf0671d | 2 | Copyright (C) 1995, 1996 Free Software Foundation, Inc. |
d66e34cd RM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If | |
17 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
18 | Cambridge, MA 02139, USA. */ | |
19 | ||
20 | #include <link.h> | |
21 | #include <dlfcn.h> | |
22 | #include <stdio.h> | |
23 | #include <string.h> | |
24 | #include <stdlib.h> | |
25 | ||
421f82e5 RM |
26 | static int last_errcode; |
27 | static const char *last_errstring; | |
28 | static const char *last_object_name; | |
d66e34cd RM |
29 | |
30 | char * | |
31 | dlerror (void) | |
32 | { | |
421f82e5 RM |
33 | static char *buf; |
34 | char *ret; | |
d66e34cd | 35 | |
421f82e5 | 36 | if (buf) |
d66e34cd | 37 | { |
421f82e5 RM |
38 | free (buf); |
39 | buf = NULL; | |
d66e34cd | 40 | } |
d66e34cd | 41 | |
421f82e5 RM |
42 | if (! last_errstring) |
43 | return NULL; | |
44 | ||
45 | if (last_errcode == 0 && ! last_object_name) | |
46 | ret = (char *) last_errstring; | |
47 | else if (last_errcode == 0) | |
48 | ret = (asprintf (&buf, "%s: %s", last_object_name, last_errstring) == -1 | |
49 | ? NULL : buf); | |
50 | else if (! last_object_name) | |
51 | ret = (asprintf (&buf, "%s: %s", | |
52 | last_errstring, strerror (last_errcode)) == -1 | |
53 | ? NULL : buf); | |
54 | else | |
55 | ret = (asprintf (&buf, "%s: %s: %s", | |
56 | last_object_name, last_errstring, | |
57 | strerror (last_errcode)) == -1 | |
58 | ? NULL : buf); | |
59 | ||
60 | /* Reset the error indicator. */ | |
dcf0671d | 61 | free (last_errstring); |
421f82e5 RM |
62 | last_errstring = NULL; |
63 | return ret; | |
d66e34cd RM |
64 | } |
65 | ||
66 | int | |
67 | _dlerror_run (void (*operate) (void)) | |
68 | { | |
dcf0671d UD |
69 | if (last_errstring != NULL) |
70 | /* Free the error string from the last failed command. This can | |
71 | happen if `dlerror' was not run after an error was found. */ | |
72 | free (last_errstring); | |
73 | ||
421f82e5 RM |
74 | last_errcode = _dl_catch_error (&last_errstring, &last_object_name, |
75 | operate); | |
76 | return last_errstring != NULL; | |
d66e34cd | 77 | } |