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support: Add xdlvsym function

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This commit is contained in:
Florian Weimer 2019-06-28 10:15:30 +02:00
parent 5a659ccc0e
commit 17432d7150
3 changed files with 26 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2019-06-28 Florian Weimer <fweimer@redhat.com>
* support/xdlfcn.h (xdlvsym): Declare function.
* support/xdlfcn.c (xdlvsym): Define funciton.
2019-06-28 Florian Weimer <fweimer@redhat.com>
[BZ #24744]

20
support/xdlfcn.c
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@ -51,6 +51,26 @@ xdlsym (void *handle, const char *symbol)
return sym;
}
void *
xdlvsym (void *handle, const char *symbol, const char *version)
{
/* Clear any pending errors. */
dlerror ();
void *sym = dlvsym (handle, symbol, version);
if (sym == NULL)
{
const char *error = dlerror ();
if (error != NULL)
FAIL_EXIT1 ("error: dlvsym: %s\n", error);
/* If there was no error, we found a NULL symbol. Return the
NULL value in this case. */
}
return sym;
}
void
xdlclose (void *handle)
{

1
support/xdlfcn.h
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@ -27,6 +27,7 @@ __BEGIN_DECLS
void *xdlopen (const char *filename, int flags);
void *xdlmopen (Lmid_t lmid, const char *filename, int flags);
void *xdlsym (void *handle, const char *symbol);
void *xdlvsym (void *handle, const char *symbol, const char *version);
void xdlclose (void *handle);
__END_DECLS