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commit 17432d7150bdab3bce2ea66c70ad6c920f54077a
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Fri Jun 28 10:15:30 2019 +0200
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support: Add xdlvsym function
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diff --git a/support/xdlfcn.c b/support/xdlfcn.c
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index f34bb059c00f27f7..b4a6b85649d181c8 100644
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--- a/support/xdlfcn.c
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+++ b/support/xdlfcn.c
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@@ -48,6 +48,26 @@ xdlsym (void *handle, const char *symbol)
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return sym;
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}
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+void *
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+xdlvsym (void *handle, const char *symbol, const char *version)
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+{
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+ /* Clear any pending errors. */
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+ dlerror ();
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+
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+ void *sym = dlvsym (handle, symbol, version);
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+
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+ if (sym == NULL)
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+ {
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+ const char *error = dlerror ();
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+ if (error != NULL)
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+ FAIL_EXIT1 ("error: dlvsym: %s\n", error);
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+ /* If there was no error, we found a NULL symbol. Return the
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+ NULL value in this case. */
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+ }
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+
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+ return sym;
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+}
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+
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void
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xdlclose (void *handle)
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{
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diff --git a/support/xdlfcn.h b/support/xdlfcn.h
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index 5ab7494e70924f52..ab1cbb3cb9bb1cc7 100644
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--- a/support/xdlfcn.h
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+++ b/support/xdlfcn.h
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@@ -26,6 +26,7 @@ __BEGIN_DECLS
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/* Each of these terminates process on failure with relevant error message. */
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void *xdlopen (const char *filename, int flags);
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void *xdlsym (void *handle, const char *symbol);
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+void *xdlvsym (void *handle, const char *symbol, const char *version);
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void xdlclose (void *handle);
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