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From: bfox@AUREL.CALTECH.EDU (Brian Fox)
Newsgroups: gnu.bash.bug
Subject: history numbers are wrong
Message-ID: <8906211616.AA00297@aurel.caltech.edu>
Date: 21 Jun 89 16:16:06 GMT
References: <8906210400.AA08380@hobbes.ai.mit.edu>
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   From: roland@ai.mit.edu (Roland McGrath)
   Date: Wed, 21 Jun 89 12:59:59 JST

   The history number displayed by \# in PS1 does not correspond
   to the numbers used in ! history references or the `history' builtin.
   The numbers given by \# start at 1 with each bash invocation,
   while the real history numbers start at the beginning of .bash_history.

The number display by \# is not the history number.  Here is some text
from FEATURES:

	Here is the comment next to the decode_prompt_string function.

	/* Return a string which will be printed as a prompt.  The string
	   may contain special characters which are decoded as follows:

		\t	the time
		\d	the date
		\n	CRLF
		\s	the name of the shell
		\w	the current working directory
		\u	your username
		\h	the hostname
		\#	the command number of this command
		\<octal> character code in octal
		\\	a backslash
	*/

It appears that more than one person wants the behaviour of "\!" in csh.
However, I have been wondering about other possible ways of handling
prompt strings, including standard word evaluation of it.

Brian