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Equivalente a tail/less --follow-name no OS X

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Equivalente a tail/less --follow-name no OS X

Precisocauda -fum arquivo de log que é girado.

Isto é oexatomesmo problema que o aqui, mas no OS X:

Por que o modo menos cauda para de funcionar?

Então, como posso rastrear constantemente um arquivo cujo inode pode mudar no OS X?

Responder1

Do Ubuntu Lucid (coreutils 7.4)

   -f, --follow[={name|descriptor}]
          output appended data as the file grows; -f, --follow, and --follow=descriptor are equivalent

   With --follow (-f), tail defaults to following the file descriptor, which means that even if a tail'ed file is renamed, tail will continue to track its end.  This default behavior is not desirable when  you  really  want  to
   track  the  actual  name  of  the  file, not the file descriptor (e.g., log rotation).  Use --follow=name in that case.  That causes tail to track the named file by reopening it periodically to see if it has been removed and
   recreated by some other program

No Mac OS X 10.6 (10A432)

 -f      The -f option causes tail to not stop when end of file is
         reached, but rather to wait for additional data to be appended to
         the input.  The -f option is ignored if the standard input is a
         pipe, but not if it is a FIFO.

 -F      The -F option implies the -f option, but tail will also check to
         see if the file being followed has been renamed or rotated.  The
         file is closed and reopened when tail detects that the filename
         being read from has a new inode number.  The -F option is ignored
         if reading from standard input rather than a file.

Supondo que você queira o --follow=/tmp/alguma coisa.txtcomportamento no Linux, isso significaria no Mac o que você deseja é:

tail -F /tmp/somefile.txt

Editar: Acabei de testar no Mac OSX (Snow Leopard) e-Fabrirá apenas o nome do arquivo inserido e NÃO seguirá o descritor de inode/arquivo do arquivo com o qual foi aberto quando for movido.

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