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Full Discussion: Can someone interpret this -- not sure
Top Forums Shell Programming and Scripting Can someone interpret this -- not sure Post 302419524 by alister on Friday 7th of May 2010 11:58:33 AM
Old 05-07-2010
Quote:
Originally Posted by Straitsfan
I mean a directory with just that more than one word in its name -- say, for example my\ documents/ as opposed to just documents/
It's not more than one word if you quote it. In that case, there is no field splitting done and it will always be one word (word in the bash man page sense) which happens to contain a space.


Quote:
Originally Posted by hergp
In this special case there is no effective difference between "$*" and "$@", because in bash the cd builtin accepts only one argument, the name of the directory you want to change to.
That is absolutely incorrect. If there are multiple arguments passed to a script or function, the double-quoted values "$*" and "$@" will ALWAYS differ. The former will always expand to one string, the latter to multiple strings.

If this function were called with two arguments, for example, it would try to cd into a directory named "$1" (as you pointed out, bash's built-in cd would ignore $2 and any other arguments). However, if the code were using "$*" instead, the bash builtin would be passed a single argument whose value would be "$1 $2". Definitely, not the same.

In this case, what is equivalent is the use "$@" and "$1", since bash's cd will ignore all other arguments.

Regards,
Alister
 

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LEARN ABOUT CENTOS

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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