Update Files

Kinc/Sources/kinc/libs/core/unix-plugins.c

@@ -0,0 +1,124 @@
+/*
+ * libwebsockets - small server side websockets and web server implementation
+ *
+ * Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#if !defined(_GNU_SOURCE)
+#define _GNU_SOURCE
+#endif
+#include "private-lib-core.h"
+
+#include <pwd.h>
+#include <grp.h>
+#include <dlfcn.h>
+
+const lws_plugin_header_t *
+lws_plat_dlopen(struct lws_plugin **pplugin, const char *libpath,
+		const char *sofilename, const char *_class,
+		each_plugin_cb_t each, void *each_user)
+{
+	const lws_plugin_header_t *hdr;
+	struct lws_plugin *pin;
+	char sym[96];
+	void *l;
+	int m;
+
+	if (strlen(sofilename) < 6)
+		/* [lib]...[.so] */
+		return NULL;
+
+	lwsl_info("   trying %s\n", libpath);
+
+	l = dlopen(libpath, RTLD_NOW);
+	if (!l) {
+		lwsl_info("%s: Error loading DSO: %s\n", __func__, dlerror());
+
+		return NULL;
+	}
+
+	/* we could open it... can we get his export struct? */
+	m = lws_snprintf(sym, sizeof(sym) - 1, "%s", sofilename);
+	if (m < 4)
+		goto bail;
+	if (!strcmp(&sym[m - 3], ".so"))
+		sym[m - 3] = '\0'; /* snip the .so */
+
+	hdr = (const lws_plugin_header_t *)dlsym(l, sym);
+	if (!hdr) {
+		lwsl_info("%s: Failed to get export '%s' from %s: %s\n",
+			 __func__, sym, libpath, dlerror());
+		goto bail;
+	}
+
+	if (hdr->api_magic != LWS_PLUGIN_API_MAGIC) {
+		lwsl_info("%s: plugin %s has outdated api %d (vs %d)\n",
+			 __func__, libpath, hdr->api_magic,
+			 LWS_PLUGIN_API_MAGIC);
+		goto bail;
+	}
+
+	if (strcmp(hdr->lws_build_hash, LWS_BUILD_HASH))
+		goto bail;
+
+	if (strcmp(hdr->_class, _class))
+		goto bail;
+
+	/*
+	 * We don't already have one of these, right?
+	 */
+
+	pin = *pplugin;
+	while (pin) {
+		if (!strcmp(pin->hdr->name, hdr->name))
+			goto bail;
+		pin = pin->list;
+	}
+
+	/*
+	 * OK let's bring it in
+	 */
+
+	pin = lws_plugin_alloc(pplugin);
+	if (!pin)
+		goto bail;
+
+	pin->u.l = l;
+	pin->hdr = hdr;
+
+	if (each)
+		each(pin, each_user);
+
+	lwsl_notice("   %s\n", libpath);
+
+	return hdr;
+
+bail:
+	dlclose(l);
+
+	return NULL;
+}
+
+int
+lws_plat_destroy_dl(struct lws_plugin *p)
+{
+	return dlclose(p->u.l);
+}