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_encode

gsasl_base64_encode(3)						       gsasl						    gsasl_base64_encode(3)

NAME

       gsasl_base64_encode - API function

SYNOPSIS

       #include <gsasl.h>

       int gsasl_base64_encode(char const * src, size_t srclength, char * target, size_t targsize);

ARGUMENTS

       char const * src
		   input byte array

       size_t srclength
		   size of input byte array

       char * target
		   output byte array

       size_t targsize
		   size of output byte array

DESCRIPTION

       Encode  data  as  base64.   Converts  characters, three at a time, starting at src into four base64 characters in the target area until the
       entire input buffer is encoded.

RETURN VALUE

       Returns the number of data bytes stored at the target, or -1 on error.

DEPRECATED

       Use gsasl_base64_to() instead.

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_encode(3)