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Full Discussion: Programming serial port
Top Forums Programming Programming serial port Post 302258715 by jim mcnamara on Saturday 15th of November 2008 01:02:56 PM
Old 11-15-2008
You need to do soime reading. This is the best guide out there for POSIX serial port programming:

Serial Programming Guide for POSIX Operating Systems - Michael R Sweet
 

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gnutls_x509_crt_set_serial(3)					      gnutls					     gnutls_x509_crt_set_serial(3)

NAME
gnutls_x509_crt_set_serial - Set the certificate's serial number SYNOPSIS
#include <gnutls/x509.h> int gnutls_x509_crt_set_serial(gnutls_x509_crt_t cert, const void * serial, size_t serial_size); ARGUMENTS
gnutls_x509_crt_t cert a certificate of type gnutls_x509_crt_t const void * serial The serial number size_t serial_size Holds the size of the serial field. DESCRIPTION
This function will set the X.509 certificate's serial number. Serial is not always a 32 or 64bit number. Some CAs use large serial num- bers, thus it may be wise to handle it as something opaque. RETURNS
On success, GNUTLS_E_SUCCESS is returned, otherwise a negative error value. REPORTING BUGS
Report bugs to <bug-gnutls@gnu.org>. GnuTLS home page: http://www.gnu.org/software/gnutls/ General help using GNU software: http://www.gnu.org/gethelp/ COPYRIGHT
Copyright (C) 2008 Free Software Foundation. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. SEE ALSO
The full documentation for gnutls is maintained as a Texinfo manual. If the info and gnutls programs are properly installed at your site, the command info gnutls should give you access to the complete manual. gnutls 2.8.6 gnutls_x509_crt_set_serial(3)
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