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Full Discussion: Date & NUmber Validation Query
Top Forums Shell Programming and Scripting Date & NUmber Validation Query Post 59966 by cnitadesigner on Wednesday 5th of January 2005 05:32:11 PM
Old 01-05-2005
What happens when you use this command?

echo "12/31/2004" | grep '^[0-1][0-9]/[0-3][0-9]/[0-9]\{4\}$' >/dev/null 2>&1

I used it but did not use echo $? afterword and now I'm afraid to use it on /dev/null again.

I actually used the above command but replaced the /dev/null with Test1 a file in my test directory. It erased everything in that file and replaced it with 12/31/2004.

What can I do about my /dev/null? I don't what that to be erased. But also with my test file I wanted to change the format of the date for every occurance of 12-31-2004 or 12/31/2004 to 2004-31-12 would the above command work on that with a little more tweaking?

thanks in advance!
 

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LEARN ABOUT SUSE

fdformat

FDFORMAT(8)						     Linux Programmer's Manual						       FDFORMAT(8)

NAME

       fdformat - Low-level formats a floppy disk

SYNOPSIS

       fdformat [-n] device

DESCRIPTION

       fdformat  does  a  low  level  format on a floppy disk.	device is usually one of the following (for floppy devices, the major = 2, and the
       minor is shown for informational purposes only):

	      /dev/fd0d360  (minor = 4)
	      /dev/fd0h1200 (minor = 8)
	      /dev/fd0D360  (minor = 12)
	      /dev/fd0H360  (minor = 12)
	      /dev/fd0D720  (minor = 16)
	      /dev/fd0H720  (minor = 16)
	      /dev/fd0h360  (minor = 20)
	      /dev/fd0h720  (minor = 24)
	      /dev/fd0H1440 (minor = 28)

	      /dev/fd1d360  (minor = 5)
	      /dev/fd1h1200 (minor = 9)
	      /dev/fd1D360  (minor = 13)
	      /dev/fd1H360  (minor = 13)
	      /dev/fd1D720  (minor = 17)
	      /dev/fd1H720  (minor = 17)
	      /dev/fd1h360  (minor = 21)
	      /dev/fd1h720  (minor = 25)
	      /dev/fd1H1440 (minor = 29)

       The generic floppy devices, /dev/fd0 and /dev/fd1, will fail to work with fdformat when a non-standard format is being used, or if the for-
       mat has not been autodetected earlier.  In this case, use setfdprm(8) to load the disk parameters.

OPTIONS

       -n     No verify.  This option will disable the verification that is performed after the format.

SEE ALSO

       fd(4), setfdprm(8), mkfs(8), emkfs(8)

AUTHOR

       Werner Almesberger (almesber@nessie.cs.id.ethz.ch)

AVAILABILITY

       The fdformat command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

Linux 0.99							  1 February 1993						       FDFORMAT(8)
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