snprintf always return 0

[shufps]

Should probably return ulPos.

nanos-secure-sdk/src/os_printf.c

Line 1180 in e329393

return 0;

[shufps]

Ah sorry, ulPos also is wrong ... it needs some more changes.

[shufps]

this should work.:

//unsigned int snprintf(unsigned char * str, unsigned int str_size, const char* format, ...)
int snprintf(char * str, size_t str_size, const char * format, ...)
 {
  //........    
    char* op_str = str;
  //........
    return (uint32_t) str - (uint32_t) op_str;
}

[xchapron-ledger]

I have moved your issue to the new SDK LedgerHQ/ledger-secure-sdk#236