using ls -lrt instead of ls Post: 302344098

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Top Forums UNIX for Dummies Questions & Answers using ls -lrt instead of ls Post 302344098 by Corona688 on Friday 14th of August 2009 03:04:48 PM

08-14-2009

Registered User

[edit] We cross-edited there.

The ls -l performance issue might be because it prints extended information, if your program can't account for that. We haven't seen your program -- we don't know. We thought maybe it could, but if it can't:

Code:

$ ls crc32.c
crc32.c
$ ls -l crc32.c
-rw-r--r-- 1 tyler users 1634 Jul 15 10:04 crc32.c
$

...which would cause your code to theoretically check for files "-rw-r--r--", "1", "tyler", "users", "1634", "Jul", "15", and "10:04" in addition to "crc32.c" Smilie

Its a good idea to check the manual page to see what the flags actually mean instead of blindly adding them.

Try just ls -t or ls --sort=time (they are equivalent) and see if that gets you the sorting order you want. If its backwards, ls -tr reverses it.

Last edited by Corona688; 08-14-2009 at 04:09 PM..

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ost_crc32digest

ost::CRC32Digest(3)					     Library Functions Manual					       ost::CRC32Digest(3)

NAME

       ost::CRC32Digest -

       A crc32 collection/computation hash accumulator class.

SYNOPSIS

       #include <digest.h>

       Inherits ost::Digest.

   Public Member Functions
       CRC32Digest ()
       CRC32Digest (const CRC32Digest &crc)
       void initDigest (void)
       unsigned getSize (void)
       operator const uint32 () const
       uint32 getDigest (void)
       unsigned getDigest (unsigned char *buffer)
       void putDigest (const unsigned char *buffer, unsigned length)
       CRC32Digest & operator= (const CRC32Digest &right)

   Protected Member Functions
       unsigned char overflow (unsigned char octet)
       std::ostream & strDigest (std::ostream &os)

Detailed Description
       A crc32 collection/computation hash accumulator class.

       Author:
	   Kevin Kraatz kraatz@arlut.utexas.edu crc32 computation hash.

       Examples:
	   crc32.cpp.

Constructor &; Destructor Documentation
   ost::CRC32Digest::CRC32Digest ()
   ost::CRC32Digest::CRC32Digest (const CRC32Digest &crc)
Member Function Documentation
   uint32 ost::CRC32Digest::getDigest (void) [inline]
       Examples:
	   crc32.cpp.

   unsigned ost::CRC32Digest::getDigest (unsigned char *buffer) [virtual]
       Implements ost::Digest.

   unsigned ost::CRC32Digest::getSize (void) [inline],	[virtual]
       Implements ost::Digest.

   void ost::CRC32Digest::initDigest (void) [virtual]
       Implements ost::Digest.

   ost::CRC32Digest::operator const uint32 () const [inline]
   CRC32Digest& ost::CRC32Digest::operator= (const CRC32Digest &right)
   unsigned char ost::CRC32Digest::overflow (unsigned charoctet) [protected]
   void ost::CRC32Digest::putDigest (const unsigned char *buffer, unsignedlength) [virtual]
       Implements ost::Digest.

       Examples:
	   crc32.cpp.

   std::ostream& ost::CRC32Digest::strDigest (std::ostream &os) [protected],  [virtual]
       Implements ost::Digest.

Author
       Generated automatically by Doxygen for GNU CommonC++ from the source code.

GNU CommonC++							  Sat Jun 23 2012					       ost::CRC32Digest(3)