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authorFlorian Weimer <fweimer@redhat.com>2019-06-28 10:15:30 +0200
committerFlorian Weimer <fweimer@redhat.com>2019-06-28 10:15:38 +0200
commit17432d7150bdab3bce2ea66c70ad6c920f54077a (patch)
tree40b7cdb0bc63aeadf880368c1bdf1918d6e159d7
parent5a659ccc0ec217ab02a4c273a1f6d346a359560a (diff)
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support: Add xdlvsym function
-rw-r--r--ChangeLog5
-rw-r--r--support/xdlfcn.c20
-rw-r--r--support/xdlfcn.h1
3 files changed, 26 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index a3549881519..07d1bd648b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
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]
io: Remove the copy_file_range emulation.
* sysdeps/unix/sysv/linux/copy_file_range.c (copy_file_range): Do
diff --git a/support/xdlfcn.c b/support/xdlfcn.c
index b2e5c211348..11fe4896d18 100644
--- a/support/xdlfcn.c
+++ b/support/xdlfcn.c
@@ -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)
{
diff --git a/support/xdlfcn.h b/support/xdlfcn.h
index c9cd810a8a7..7f8d4930fc6 100644
--- a/support/xdlfcn.h
+++ b/support/xdlfcn.h
@@ -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