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Home > Archive > Unix Shell > December 2007 > Case_insensitive search
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Case_insensitive search
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| Tim Frink 2007-12-19, 7:32 am |
| Hi,
in a bash script (actually configure.in) I have to set a variable
to a path name.
However, depending on the system configuration, the
path might be written in lower cases or use also upper
cases.
Currently I'm doing:
MYVAR=/path_name
so, the other possibility /path_Name will not be found.
What's the best way to search for a path name
in a non case-sensitive manner?
What I need is something like
MYVAR=case_insensitive(/path_name)
Thank you.
Tim
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| Tim Frink wrote:
> Hi,
>
> in a bash script (actually configure.in) I have to set a variable
> to a path name.
>
> However, depending on the system configuration, the
> path might be written in lower cases or use also upper
> cases.
>
> Currently I'm doing:
> MYVAR=/path_name
>
> so, the other possibility /path_Name will not be found.
>
> What's the best way to search for a path name
> in a non case-sensitive manner?
>
> What I need is something like
> MYVAR=case_insensitive(/path_name)
Put that way, you can't do that. MYVAR must have a definite value, not many
at once. What you can do is check for the existence
of /path_name, /path_Name, etc. When you have determined the one that
actually exists, then you assign that to MYVAR.
| |
| Andrew Smallshaw 2007-12-19, 7:32 am |
| On 2007-12-19, Tim Frink <plfriko@yahoo.de> wrote:
>
> in a bash script (actually configure.in) I have to set a variable
> to a path name.
>
> However, depending on the system configuration, the
> path might be written in lower cases or use also upper
> cases.
>
> Currently I'm doing:
> MYVAR=/path_name
>
> so, the other possibility /path_Name will not be found.
>
> What's the best way to search for a path name
> in a non case-sensitive manner?
Since you're using bash:
shopt -s nocaseglob
--
Andrew Smallshaw
andrews@sdf.lonestar.org
| |
| Stephane Chazelas 2007-12-19, 7:32 am |
| On Wed, 19 Dec 2007 12:19:16 +0100, Tim Frink wrote:
> Hi,
>
> in a bash script (actually configure.in) I have to set a variable
> to a path name.
>
> However, depending on the system configuration, the
> path might be written in lower cases or use also upper
> cases.
>
> Currently I'm doing:
> MYVAR=/path_name
>
> so, the other possibility /path_Name will not be found.
>
> What's the best way to search for a path name
> in a non case-sensitive manner?
>
> What I need is something like
> MYVAR=case_insensitive(/path_name)
[...]
You mean you want to find the list of existing path that match
/path/to/some/dir case insensitively?
You could do something like
set /[pP][aA][tT][hH]/[tT][oO]/[sS][oO][mM][eE]/[dD][iI][rR]
for i
do
[ -d "$i" ] && set "$@" "$i"
shift
done
if [ "$#" -gt 1 ]; then
echo >&2 "more than one dir match"
exit 1
fi
if [ "$#" -eq 0 ]; then
echo >&2 "no matching dir"
exit 1
fi
Note that [ -d, returns true both for directories and symlinks
to directories.
--
Stephane
| |
| Rikishi 42 2007-12-19, 7:27 pm |
| On 2007-12-19, Tim Frink <plfriko@yahoo.de> wrote:
> in a bash script (actually configure.in) I have to set a variable
> to a path name.
>
> However, depending on the system configuration, the
> path might be written in lower cases or use also upper
> cases.
>
> Currently I'm doing:
> MYVAR=/path_name
>
> so, the other possibility /path_Name will not be found.
>
> What's the best way to search for a path name
> in a non case-sensitive manner?
>
> What I need is something like
> MYVAR=case_insensitive(/path_name)
Can't help you with that. But find can return the existing path to you, no
matter what case you use in your variable.
find start_dir/ -type d -iname "$MYVAR"
There are, of course, parameters to limit to which depth it'll search, and
such.
--
There is an art, it says, or rather, a knack to flying.
The knack lies in learning how to throw yourself at the ground and miss.
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