main.c

// Copyright (c) 2018 Catena cyber
// Author Philippe Antoine <p.antoine@catenacyber.fr>

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <dirent.h>
#include <unistd.h>

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);

static int runFile(const char *name) {
    FILE * fp;
    uint8_t *Data;
    size_t Size;

    //opens the file, get its size, and reads it into a buffer
    fp = fopen(name, "rb");
    if (fp == NULL) {
        return 2;
    }
    if (fseek(fp, 0L, SEEK_END) != 0) {
        fclose(fp);
        return 2;
    }
    Size = ftell(fp);
    if (Size == (size_t) -1) {
        fclose(fp);
        return 2;
    }
    if (fseek(fp, 0L, SEEK_SET) != 0) {
        fclose(fp);
        return 2;
    }
    Data = malloc(Size);
    if (Data == NULL) {
        fclose(fp);
        return 2;
    }
    if (fread(Data, Size, 1, fp) != 1) {
        fclose(fp);
        return 2;
    }

    //lauch fuzzer
    LLVMFuzzerTestOneInput(Data, Size);
    fclose(fp);
    return 0;
}

int main(int argc, char** argv)
{
    DIR *d;
    struct dirent *dir;
    int r = 0;
    int i;

    if (argc != 2) {
        return 1;
    }

    d = opendir(argv[1]);
    if (d == NULL) {
        //try as single file
        return runFile(argv[1]);
        return 0;
    }
    if (chdir(argv[1]) != 0) {
        closedir(d);
        printf("Invalid directory\n");
        return 2;
    }
    while((dir = readdir(d)) != NULL) {
        //opens the file, get its size, and reads it into a buffer
        if (dir->d_type != DT_REG) {
            continue;
        }
        printf("Running file %s\n", dir->d_name);
        if (runFile(dir->d_name) != 0) {
            printf("Error while running file %s\n", dir->d_name);
        }
    }
    closedir(d);
    printf("Ok : whole directory finished\n");

    return 0;
}