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#include <stdio.h>

#include <stdlib.h>

#include <a.out.h>

#include <string.h>

int main(int argc, char **argv)

{

        void *data;

        struct exec ex;

        FILE *f;

        int totlen;

        if (argc < 2) {

                fprintf(stderr, "Usage: build kernel-name\n");

                exit(1);

        }

        f = fopen(argv[1], "rb");

        fread(&ex, 1, sizeof(ex), f);

        if(N_MAGIC(ex) == ZMAGIC) {

                fseek(f, 4096, SEEK_SET);

                totlen = ex.a_text + ex.a_data;

        } else

        if(N_MAGIC(ex) == QMAGIC) {

                unsigned int my_header;

                fseek(f, 4, SEEK_SET);

                my_header = 0xea000006;

                fwrite(&my_header, 4, 1, stdout);

                totlen = ex.a_text + ex.a_data - 4;

        } else {

                fprintf(stderr, "Unacceptable a.out header on kernel\n");

                fclose(f);

                exit(1);

        }

        fprintf(stderr, "Kernel is %dk (%dk text, %dk data, %dk bss)\n",

                (ex.a_text + ex.a_data + ex.a_bss)/1024,

                 ex.a_text/1024, ex.a_data/1024, ex.a_bss/1024);

        data = malloc(totlen);

        fread(data, 1, totlen, f);

        fwrite(data, 1, totlen, stdout);

        free(data);

        fclose(f);

        fflush(stdout);

        return 0;

}