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#include 

#include 

#include 

int write_file(const char *path,const void *buff,

               size_t offset, size_t count, size_t *writes)

{

    int retval;

    __asm__ __volatile__(

    "pushl $0 \n\t"

    "pushl $0 \n\t"

    "movl %%eax, 1(%%esp) \n\t"

    "pushl %%ebx \n\t"

    "pushl %%edx \n\t"

    "pushl $0 \n\t"

    "pushl %%ecx \n\t"

    "pushl $3 \n\t"

    "movl %%esp, %%ebx \n\t"

    "mov $70, %%eax \n\t"

    "int $0x40 \n\t"

    "testl %%esi, %%esi \n\t"

    "jz 1f \n\t"

    "movl %%ebx, (%%esi) \n\t"

"1:"

    "addl $28, %%esp \n\t"

    :"=a" (retval)

    :"a"(path),"b"(buff),"c"(offset),"d"(count),"S"(writes));

    if(retval == 0)

        return 0;

    else if (retval == 8)

        return ENOSPC;

    return -1;

};