Function main

tinyemu/splitimg.c:31–102

#include <getopt.h>

int main(int argc, char **argv)
{
    int blocksize, ret, i;
    const char *infilename, *outpath;
    FILE *f, *fo;
    char buf1[1024];
    uint8_t *buf;

    if ((optind + 1) >= argc) {
        printf("splitimg version " CONFIG_VERSION ", Copyright (c) 2011-2016 Fabrice Bellard\n"
               "usage: splitimg infile outpath [blocksize]\n"
               "Create a multi-file disk image for the RISCVEMU HTTP block device\n"
               "\n"
               "outpath must be a directory\n"
               "blocksize is the block size in KB\n");
        exit(1);
    }

    infilename = argv[optind++];
    outpath = argv[optind++];
    blocksize = 256;
    if (optind < argc)
        blocksize = strtol(argv[optind++], NULL, 0);

    blocksize *= 1024;
    
    buf = malloc(blocksize);

    f = fopen(infilename, "rb");
    if (!f) {
        perror(infilename);
        exit(1);
    }
    i = 0;
    for(;;) {
        ret = fread(buf, 1, blocksize, f);
        if (ret < 0) {
            perror("fread");
            exit(1);
        }
        if (ret == 0)
            break;
        if (ret < blocksize) {
            printf("warning: last block is not full\n");
            memset(buf + ret, 0, blocksize - ret);
        }
        snprintf(buf1, sizeof(buf1), "%s/blk%09u.bin", outpath, i);
        fo = fopen(buf1, "wb");
        if (!fo) {
            perror(buf1);
            exit(1);
        }
        fwrite(buf, 1, blocksize, fo);
        fclose(fo);
        i++;
    }
    fclose(f);
    printf("%d blocks\n", i);