04-08-2010
Are you asking how to tell what size the presented LUN is or how to check for available space on the SAN?
If you would like to find out how big your LUN is, it would be the same as any SCSI disk, more than likely
If the question is how to check for available space, you should contact your storage vendor to find out if they offer any interface to do so.
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LEARN ABOUT CENTOS
gnutls_x509_crt_get_issuer_alt_name
gnutls_x509_crt_get_issuer_alt_name(3) gnutls gnutls_x509_crt_get_issuer_alt_name(3)
NAME
gnutls_x509_crt_get_issuer_alt_name - API function
SYNOPSIS
#include <gnutls/x509.h>
int gnutls_x509_crt_get_issuer_alt_name(gnutls_x509_crt_t cert, unsigned int seq, void * ian, size_t * ian_size, unsigned int * critical);
ARGUMENTS
gnutls_x509_crt_t cert
should contain a gnutls_x509_crt_t structure
unsigned int seq
specifies the sequence number of the alt name (0 for the first one, 1 for the second etc.)
void * ian is the place where the alternative name will be copied to
size_t * ian_size
holds the size of ian.
unsigned int * critical
will be non-zero if the extension is marked as critical (may be null)
DESCRIPTION
This function retrieves the Issuer Alternative Name (2.5.29.18), contained in the given certificate in the X509v3 Certificate Extensions.
When the SAN type is otherName, it will extract the data in the otherName's value field, and GNUTLS_SAN_OTHERNAME is returned. You may use
gnutls_x509_crt_get_subject_alt_othername_oid() to get the corresponding OID and the "virtual" SAN types (e.g., GNUTLS_SAN_OTHERNAME_XMPP).
If an otherName OID is known, the data will be decoded. Otherwise the returned data will be DER encoded, and you will have to decode it
yourself. Currently, only the RFC 3920 id-on-xmppAddr Issuer AltName is recognized.
RETURNS
the alternative issuer name type on success, one of the enumerated gnutls_x509_subject_alt_name_t. It will return GNUTLS_E_SHORT_MEM-
ORY_BUFFER if ian_size is not large enough to hold the value. In that case ian_size will be updated with the required size. If the cer-
tificate does not have an Alternative name with the specified sequence number then GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.
SINCE
2.10.0
REPORTING BUGS
Report bugs to <bug-gnutls@gnu.org>.
General guidelines for reporting bugs: http://www.gnu.org/gethelp/
GnuTLS home page: http://www.gnu.org/software/gnutls/
COPYRIGHT
Copyright (C) 2012 Free Software Foundation, Inc..
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. As an alternative you may obtain the manual from:
http://www.gnu.org/software/gnutls/manual/
gnutls 3.1.15 gnutls_x509_crt_get_issuer_alt_name(3)