mirror of https://gitee.com/openkylin/wget.git
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
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/*
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* Copyright (c) 2017-2019 Free Software Foundation, Inc.
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*
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* This file is part of GNU Wget.
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*
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* GNU Wget is free software; you can redistribute it and/or modify
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* it under the terms of the GNU 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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* GNU Wget 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Wget. 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 <fcntl.h> // open flags
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#include <unistd.h> // close
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#include <setjmp.h> // longjmp, setjmp
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#ifdef __cplusplus
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extern "C" {
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#endif
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// declarations for wget internal functions
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int main_wget(int argc, const char **argv);
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void cleanup(void);
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FILE *fopen_wget(const char *pathname, const char *mode);
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FILE *fopen_wgetrc(const char *pathname, const char *mode);
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void exit_wget(int status);
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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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FILE *fopen_wget(const char *pathname, const char *mode)
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{
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return fopen("/dev/null", mode);
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}
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FILE *fopen_wgetrc(const char *pathname, const char *mode)
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{
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#ifdef HAVE_FMEMOPEN
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return fmemopen((void *) g_data, g_size, mode);
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#else
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return NULL;
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#endif
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}
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static int do_jump;
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static jmp_buf jmpbuf;
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#ifdef FUZZING
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void exit_wget(int status)
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{
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longjmp(jmpbuf, 1);
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}
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#elif defined HAVE_DLFCN_H
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#include <dlfcn.h> // dlsym
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#ifndef RTLD_NEXT
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#define RTLD_NEXT RTLD_GLOBAL
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#endif
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void exit(int status)
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{
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if (do_jump) {
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longjmp(jmpbuf, 1);
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} else {
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void (*libc_exit)(int) = (void(*)(int)) dlsym (RTLD_NEXT, "exit");
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libc_exit(status);
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}
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}
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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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static const char *argv[] = { "wget", "-q" };
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if (size > 2048) // same as max_len = ... 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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CLOSE_STDERR
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do_jump = 1;
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if (setjmp(jmpbuf))
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goto done;
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main_wget(sizeof(argv)/sizeof(argv[0]), argv);
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done:
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cleanup();
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do_jump = 0;
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RESTORE_STDERR
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return 0;
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}
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