SEQ_OPEN(9) The Linux VFS SEQ_OPEN(9)NAME
seq_open - initialize sequential file
SYNOPSIS
int seq_open(struct file * file, const struct seq_operations * op);
ARGUMENTS
file
file we initialize
op
method table describing the sequence
DESCRIPTION
seq_open sets file, associating it with a sequence described by op. op->start sets the iterator up and returns the first element of
sequence. op->stop shuts it down. op->next returns the next element of sequence. op->show prints element into the buffer. In case of
error ->start and ->next return ERR_PTR(error). In the end of sequence they return NULL. ->show returns 0 in case of success and negative
number in case of error. Returning SEQ_SKIP means "discard this element and move on".
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SEQ_OPEN(9)
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asn1_der_decoding_startEnd(3) libtasn1 asn1_der_decoding_startEnd(3)NAME
asn1_der_decoding_startEnd - Find the start and end point of an element in a DER encoding string.
SYNOPSIS
#include <libtasn1.h>
asn1_retCode asn1_der_decoding_startEnd(ASN1_TYPE element, const void * ider, int len, const char * name_element, int * start, int * end);
ARGUMENTS
ASN1_TYPE element
pointer to an ASN1 element
const void * ider
vector that contains the DER encoding.
int len number of bytes of *ider: ider[0]..ider[len-1]
const char * name_element
an element of NAME structure.
int * start the position of the first byte of NAME_ELEMENT decoding (ider[*start])
int * end the position of the last byte of NAME_ELEMENT decoding (ider[*end])
DESCRIPTION
Find the start and end point of an element in a DER encoding string. I mean that if you have a der encoding and you have already used the
function "asn1_der_decoding" to fill a structure, it may happen that you want to find the piece of string concerning an element of the
structure.
EXAMPLE
the sequence "tbsCertificate" inside an X509 certificate.
RETURNS ASN1_SUCCESS
DER encoding OK.
ASN1_ELEMENT_NOT_FOUND
ELEMENT is ASN1_TYPE EMPTY or NAME_ELEMENT is not a valid element.
ASN1_TAG_ERROR,ASN1_DER_ERROR: the der encoding doesn't match the structure ELEMENT.
COPYRIGHT
Copyright (C) 2006, 2007, 2008, 2009 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 libtasn1 is maintained as a Texinfo manual. If the info and libtasn1 programs are properly installed at your
site, the command
info libtasn1
should give you access to the complete manual.
libtasn1 2.2 asn1_der_decoding_startEnd(3)