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Full Discussion: Extract sequences of bytes from binary for differents blocks
Top Forums Shell Programming and Scripting Extract sequences of bytes from binary for differents blocks Post 302850407 by Chubler_XL on Wednesday 4th of September 2013 04:16:46 PM
Old 09-04-2013
In function remover_fs you don't malloc enough memory for the string (You need 1 extra char for the null terminator).

My advice is to not allocate any memory and just print the output as required.

Try this replacement function:

Code:
void remover_fs (const unsigned char * ptr, unsigned int len)
{
    unsigned int i;


    for (i = 0; i < len; i++)
    {
        if ((ptr[i] >> 4) != 0xf)
        {
            printf ("%01x", ptr[i] >> 4);
        }
        if ((ptr[i] & 0xf) != 0xf)
        {
            printf ("%01x", ptr[i] & 0xf);
        }
    }
    printf("|");
    return;
}

 

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LEARN ABOUT NETBSD

atomic_dec_ptr_nv

ATOMIC_DEC(3)						   BSD Library Functions Manual 					     ATOMIC_DEC(3)

NAME

     atomic_dec, atomic_dec_32, atomic_dec_uint, atomic_dec_ulong, atomic_dec_ptr, atomic_dec_64, atomic_dec_32_nv, atomic_dec_uint_nv,
     atomic_dec_ulong_nv, atomic_dec_ptr_nv, atomic_dec_64_nv -- atomic decrement operations

SYNOPSIS

     #include <sys/atomic.h>

     void
     atomic_dec_32(volatile uint32_t *ptr);

     void
     atomic_dec_uint(volatile unsigned int *ptr);

     void
     atomic_dec_ulong(volatile unsigned long *ptr);

     void
     atomic_dec_ptr(volatile void *ptr);

     void
     atomic_dec_64(volatile uint64_t *ptr);

     uint32_t
     atomic_dec_32_nv(volatile uint32_t *ptr);

     unsigned int
     atomic_dec_uint_nv(volatile unsigned int *ptr);

     unsigned long
     atomic_dec_ulong_nv(volatile unsigned long *ptr);

     void *
     atomic_dec_ptr_nv(volatile void *ptr);

     uint64_t
     atomic_dec_64_nv(volatile uint64_t *ptr);

DESCRIPTION

     The atomic_dec family of functions decrement (by one) the variable referenced by ptr in an atomic fashion.

     The *_nv() variants of these functions return the new value.

     The 64-bit variants of these functions are available only on platforms that can support atomic 64-bit memory access.  Applications can check
     for the availability of 64-bit atomic memory operations by testing if the pre-processor macro __HAVE_ATOMIC64_OPS is defined.

SEE ALSO

     atomic_ops(3)

HISTORY

     The atomic_dec functions first appeared in NetBSD 5.0.

BSD
								  April 11, 2007							       BSD
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