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bc6e206322
Not all files we want to find using virFileFindResource{,Full} are
generated when libvirt is built, some of them (such as RNG schemas) are
distributed with sources. The current API was not able to find source
files if libvirt was built in VPATH.
Both RNG schemas and cpu_map.xml are distributed in source tarball.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
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* driver.c: Helpers for loading drivers
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*
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* Copyright (C) 2006-2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include <unistd.h>
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#include <c-ctype.h>
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#include "driver.h"
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#include "viralloc.h"
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#include "virfile.h"
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#include "virlog.h"
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#include "virutil.h"
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#include "configmake.h"
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#include "virstring.h"
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VIR_LOG_INIT("driver");
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#define DEFAULT_DRIVER_DIR LIBDIR "/libvirt/connection-driver"
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#ifdef WITH_DRIVER_MODULES
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/* XXX re-implment this for other OS, or use libtools helper lib ? */
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# include <dlfcn.h>
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void *
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virDriverLoadModule(const char *name)
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{
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char *modfile = NULL, *regfunc = NULL, *fixedname = NULL;
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char *tmp;
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void *handle = NULL;
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int (*regsym)(void);
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VIR_DEBUG("Module load %s", name);
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if (!(modfile = virFileFindResourceFull(name,
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"libvirt_driver_",
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".so",
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abs_topbuilddir "/src/.libs",
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LIBDIR "/libvirt/connection-driver",
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"LIBVIRT_DRIVER_DIR")))
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return NULL;
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if (access(modfile, R_OK) < 0) {
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VIR_WARN("Module %s not accessible", modfile);
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goto cleanup;
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}
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virUpdateSelfLastChanged(modfile);
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handle = dlopen(modfile, RTLD_NOW | RTLD_GLOBAL);
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if (!handle) {
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VIR_ERROR(_("failed to load module %s %s"), modfile, dlerror());
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goto cleanup;
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}
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if (VIR_STRDUP_QUIET(fixedname, name) < 0) {
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VIR_ERROR(_("out of memory"));
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goto cleanup;
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}
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/* convert something_like_this into somethingLikeThis */
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while ((tmp = strchr(fixedname, '_'))) {
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memmove(tmp, tmp + 1, strlen(tmp));
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*tmp = c_toupper(*tmp);
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}
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if (virAsprintfQuiet(®func, "%sRegister", fixedname) < 0)
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goto cleanup;
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regsym = dlsym(handle, regfunc);
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if (!regsym) {
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VIR_ERROR(_("Missing module registration symbol %s"), regfunc);
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goto cleanup;
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}
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if ((*regsym)() < 0) {
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VIR_ERROR(_("Failed module registration %s"), regfunc);
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goto cleanup;
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}
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VIR_FREE(modfile);
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VIR_FREE(regfunc);
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VIR_FREE(fixedname);
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return handle;
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cleanup:
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VIR_FREE(modfile);
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VIR_FREE(regfunc);
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VIR_FREE(fixedname);
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if (handle)
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dlclose(handle);
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return NULL;
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}
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/* XXX unload modules, but we can't until we can unregister libvirt drivers */
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#endif
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