mirror of
https://gitlab.com/gnuwget/wget2.git
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123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
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* Copyright (c) 2017-2023 Free Software Foundation, Inc.
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*
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* This file is part of libwget.
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*
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* Libwget is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Libwget 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
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* GNU 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 License
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* along with libwget. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <dirent.h> // opendir, readdir
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#include <stdint.h> // uint8_t
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#include <stdio.h> // fmemopen
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#include <string.h> // strncmp
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#include "wget.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "../src/wget_options.h"
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#include "../src/wget_plugin.h"
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#include "../src/wget_testing.h"
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#ifdef __cplusplus
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}
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#endif
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#include "fuzzer.h"
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static const uint8_t *g_data;
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static size_t g_size;
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#if defined HAVE_DLFCN_H && defined HAVE_FMEMOPEN
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#include <dlfcn.h>
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#ifdef RTLD_NEXT /* Not defined e.g. on CygWin */
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DIR *opendir(const char *name)
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{
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DIR *(*libc_opendir)(const char *) =
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(DIR *(*)(const char *)) dlsym (RTLD_NEXT, "opendir");
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if (config.dont_write)
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return NULL;
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return libc_opendir(name);
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/*
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#ifdef TEST_RUN
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printf("opendir %s\n", name);
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if (!strcmp(name, SRCDIR"/wget_options_fuzzer.in"))
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return libc_opendir(name);
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if (!strcmp(name, SRCDIR"/wget_options_fuzzer.new"))
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return libc_opendir(name);
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if (!strcmp(name, SRCDIR"/wget_options_fuzzer.repro"))
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return libc_opendir(name);
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#else
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if (!strcmp(name, "wget_options_fuzzer.in"))
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return libc_opendir(name);
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if (!strcmp(name, "wget_options_fuzzer.new"))
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return libc_opendir(name);
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if (!strcmp(name, "wget_options_fuzzer.repro"))
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return libc_opendir(name);
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#endif
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return libc_opendir(name);
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*/
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}
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FILE *fopen(const char *pathname, const char *mode)
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{
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FILE *(*libc_fopen)(const char *, const char *) =
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(FILE *(*)(const char *, const char *)) dlsym (RTLD_NEXT, "fopen");
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if (config.dont_write) {
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if (!strcmp(pathname, "d41d8cd98f00b204e9800998ecf8428e") && !strcmp(mode, "r"))
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return fmemopen((void *) g_data, g_size, mode);
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// printf("open %s, %s\n", pathname, mode);
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}
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return libc_fopen(pathname, mode);
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}
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#endif
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#endif
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
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{
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if (size > 2048) // same as max_len = 4096 in .options file
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return 0;
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g_data = data;
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g_size = size;
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config.dont_write = 1;
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if (size == 0)
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selftest_options();
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// try not to open/write to the file system
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#if defined HAVE_DLFCN_H && defined HAVE_FMEMOPEN
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static const char *argv[] = { "x", "-q", "--no-config", "--no-local-db", "--config", "d41d8cd98f00b204e9800998ecf8428e" };
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plugin_db_init();
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enable_testing(); // function in wget2 to prevent unwanted action while testing
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init(sizeof(argv)/sizeof(argv[0]), argv);
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deinit();
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plugin_db_finalize(0);
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#endif
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config.dont_write = 0;
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return 0;
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}
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