glibc/support/xdlfcn.c
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

80 lines
2.0 KiB
C

/* Support functionality for using dlopen/dlclose/dlsym.
Copyright (C) 2017-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stddef.h>
#include <support/check.h>
#include <support/xdlfcn.h>
void *
xdlopen (const char *filename, int flags)
{
void *dso = dlopen (filename, flags);
if (dso == NULL)
FAIL_EXIT1 ("error: dlopen: %s\n", dlerror ());
return dso;
}
void *
xdlsym (void *handle, const char *symbol)
{
/* Clear any pending errors. */
dlerror ();
void *sym = dlsym (handle, symbol);
if (sym == NULL)
{
const char *error = dlerror ();
if (error != NULL)
FAIL_EXIT1 ("error: dlsym: %s\n", error);
/* If there was no error, we found a NULL symbol. Return the
NULL value in this case. */
}
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)
{
if (dlclose (handle) != 0)
FAIL_EXIT1 ("error: dlclose: %s\n", dlerror ());
}