dd bytesize Post: 302515146

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Top Forums UNIX for Advanced & Expert Users dd bytesize Post 302515146 by pludi on Tuesday 19th of April 2011 08:25:19 AM

04-19-2011

Registered User

"bs" is the block size, not the byte size (a byte is always 8 bits). Reasons you might want to use it:

To transfer a certain amount of fixed-size records (using bs and count options)
To match the block size of a device, thus reducing I/O blocking (eg. for hard disks and tapes)
To make use of a large buffer, thus reducing I/O requests

Simple example: you want to create a backup of the master boot record prior to changing the layout, it's as simple as dd if=/dev/sda of=part_table.backup bs=512 count=1, since the MBR is exactly the 512 bytes at the beginning of the disk (including boot loader, partition table, ...)

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gsasl_base64_from

gsasl_base64_from(3)						       gsasl						      gsasl_base64_from(3)

NAME

       gsasl_base64_from - API function

SYNOPSIS

       #include <gsasl.h>

       int gsasl_base64_from(const char * in, size_t inlen, char ** out, size_t * outlen);

ARGUMENTS

       const char * in
		   input byte array

       size_t inlen
		   size of input byte array

       char ** out pointer to newly allocated output byte array

       size_t * outlen
		   pointer to size of newly allocated output byte array

DESCRIPTION

       Decode Base64 data.  The out buffer must be deallocated by the caller.

RETURN VALUE

       Returns GSASL_OK on success, GSASL_BASE64_ERROR if input was invalid, and GSASL_MALLOC_ERROR on memory allocation errors.

SINCE

       0.2.2

REPORTING BUGS

       Report	bugs   to  <bug-gsasl@gnu.org>.   GNU  SASL  home  page:  http://www.gnu.org/software/gsasl/  General  help  using  GNU  software:
       http://www.gnu.org/gethelp/

COPYRIGHT

       Copyright (C) 2002-2012 Simon Josefsson.
       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 gsasl is maintained as a Texinfo manual.  If the info and gsasl programs are properly installed at your site,
       the command

	      info gsasl

       should give you access to the complete manual.

gsasl								       1.8.0						      gsasl_base64_from(3)