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-rw-r--r--fluent-bit/lib/librdkafka-2.1.0/src/rddl.c179
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diff --git a/fluent-bit/lib/librdkafka-2.1.0/src/rddl.c b/fluent-bit/lib/librdkafka-2.1.0/src/rddl.c
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+++ b/fluent-bit/lib/librdkafka-2.1.0/src/rddl.c
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+/*
+ * librdkafka - The Apache Kafka C/C++ library
+ *
+ * Copyright (c) 2017 Magnus Edenhill
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "rd.h"
+#include "rddl.h"
+
+#if WITH_LIBDL
+#include <dlfcn.h>
+
+#elif defined(_WIN32)
+
+#else
+#error "Dynamic library loading not supported on this platform"
+#endif
+
+
+
+/**
+ * @brief Latest thread-local dl error, normalized to suit our logging.
+ * @returns a newly allocated string that must be freed
+ */
+static char *rd_dl_error(void) {
+#if WITH_LIBDL
+ char *errstr;
+ char *s;
+ errstr = dlerror();
+ if (!errstr)
+ return rd_strdup("No error returned from dlerror()");
+
+ errstr = rd_strdup(errstr);
+ /* Change newlines to separators. */
+ while ((s = strchr(errstr, '\n')))
+ *s = '.';
+
+ return errstr;
+
+#elif defined(_WIN32)
+ char buf[1024];
+ rd_strerror_w32(GetLastError(), buf, sizeof(buf));
+ return rd_strdup(buf);
+#endif
+}
+
+/**
+ * @brief Attempt to load library \p path.
+ * @returns the library handle (platform dependent, thus opaque) on success,
+ * else NULL.
+ */
+static rd_dl_hnd_t *
+rd_dl_open0(const char *path, char *errstr, size_t errstr_size) {
+ void *handle;
+ const char *loadfunc;
+#if WITH_LIBDL
+ loadfunc = "dlopen()";
+ handle = dlopen(path, RTLD_NOW | RTLD_LOCAL);
+#elif defined(_WIN32)
+ loadfunc = "LoadLibrary()";
+ handle = (void *)LoadLibraryA(path);
+#endif
+ if (!handle) {
+ char *dlerrstr = rd_dl_error();
+ rd_snprintf(errstr, errstr_size, "%s failed: %s", loadfunc,
+ dlerrstr);
+ rd_free(dlerrstr);
+ }
+ return (rd_dl_hnd_t *)handle;
+}
+
+
+/**
+ * @brief Attempt to load library \p path, possibly with a filename extension
+ * which will be automatically resolved depending on platform.
+ * @returns the library handle (platform dependent, thus opaque) on success,
+ * else NULL.
+ */
+rd_dl_hnd_t *rd_dl_open(const char *path, char *errstr, size_t errstr_size) {
+ rd_dl_hnd_t *handle;
+ char *extpath;
+ size_t pathlen;
+ const char *td, *fname;
+ const char *solib_ext = SOLIB_EXT;
+
+ /* Try original path first. */
+ handle = rd_dl_open0(path, errstr, errstr_size);
+ if (handle)
+ return handle;
+
+ /* Original path not found, see if we can append the solib_ext
+ * filename extension. */
+
+ /* Get filename and filename extension.
+ * We can't rely on basename(3) since it is not portable */
+ fname = strrchr(path, '/');
+#ifdef _WIN32
+ td = strrchr(path, '\\');
+ if (td > fname)
+ fname = td;
+#endif
+ if (!fname)
+ fname = path;
+
+ td = strrchr(fname, '.');
+
+ /* If there is a filename extension ('.' within the last characters)
+ * then bail out, we will not append an extension in this case. */
+ if (td && td >= fname + strlen(fname) - strlen(SOLIB_EXT))
+ return NULL;
+
+ /* Append platform-specific library extension. */
+ pathlen = strlen(path);
+ extpath = rd_alloca(pathlen + strlen(solib_ext) + 1);
+ memcpy(extpath, path, pathlen);
+ memcpy(extpath + pathlen, solib_ext, strlen(solib_ext) + 1);
+
+ /* Try again with extension */
+ return rd_dl_open0(extpath, errstr, errstr_size);
+}
+
+
+/**
+ * @brief Close handle previously returned by rd_dl_open()
+ * @remark errors are ignored (what can we do anyway?)
+ */
+void rd_dl_close(rd_dl_hnd_t *handle) {
+#if WITH_LIBDL
+ dlclose((void *)handle);
+#elif defined(_WIN32)
+ FreeLibrary((HMODULE)handle);
+#endif
+}
+
+/**
+ * @brief look up address of \p symbol in library handle \p handle
+ * @returns the function pointer on success or NULL on error.
+ */
+void *rd_dl_sym(rd_dl_hnd_t *handle,
+ const char *symbol,
+ char *errstr,
+ size_t errstr_size) {
+ void *func;
+#if WITH_LIBDL
+ func = dlsym((void *)handle, symbol);
+#elif defined(_WIN32)
+ func = GetProcAddress((HMODULE)handle, symbol);
+#endif
+ if (!func) {
+ char *dlerrstr = rd_dl_error();
+ rd_snprintf(errstr, errstr_size,
+ "Failed to load symbol \"%s\": %s", symbol,
+ dlerrstr);
+ rd_free(dlerrstr);
+ }
+ return func;
+}