In a Windows command script, one can determine the directory path of the currently executing script using %~dp0. For example:
@echo Running from %~dp0
What would be the equivalent in a BASH script?
views:
1825answers:
5
+6
A:
For the relative path (i.e. the direct equivalent of Windows' %~dp0):
MY_PATH="`dirname \"$0\"`"
echo "$MY_PATH"
For the absolute, normalized path:
MY_PATH="`dirname \"$0\"`" # relative
MY_PATH="`( cd \"$MY_PATH\" && pwd )`" # absolutized and normalized
if [ -z "$MY_PATH" ] ; then
# error; for some reason, the path is not accessible
# to the script (e.g. permissions re-evaled after suid)
exit 1 # fail
fi
echo "$MY_PATH"
Cheers, V.
vladr
2009-03-10 14:12:26
doesn't work on my mac bash.
Mykola Golubyev
2009-03-10 14:13:30
what is the problem on your mac bash? works just fine over here on Cygwin, Linux, Solaris, etc., and it must also work on mac
vladr
2009-03-10 14:15:30
it only gives the relative path though
anon
2009-03-10 14:16:13
$0 gives "-bash" and then dirname argue about "-b" option.
Mykola Golubyev
2009-03-10 14:19:08
@Mykola, This is because you are running it directly at the command prompt, not from a script, and because mac is anal about what $0 is at the command prompt (the above works at the command prompt on all other platforms BTW.)
vladr
2009-03-10 14:20:10
If you do "exec /bin/bash" you'll then populate $0 with what you want.
Nerdling
2009-03-10 14:20:45
If this is bash specifically I'd use `$()` over `\`\``. The only thing that \` has better is POSIX-compatibility.
Daenyth
2010-07-14 02:54:10
+1
A:
Assuming you type in the full path to the bash script, use $0 and dirname, e.g.:
#!/bin/bash
echo "$0"
dirname "$0"
Example output:
$ /a/b/c/myScript.bash
/a/b/c/myScript.bash
/a/b/c
If necessary, append the results of the $PWD variable to a relative path.
EDIT: Added quotation marks to handle space characters.
Alex Reynolds
2009-03-10 14:17:55
+1
A:
Contributed by Stephane CHAZELAS on c.u.s. Assuming POSIX shell:
prg=$0
if [ ! -e "$prg" ]; then
case $prg in
(*/*) exit 1;;
(*) prg=$(command -v -- "$prg") || exit;;
esac
fi
dir=$(
cd -P -- "$(dirname -- "$prg")" && pwd -P
) || exit
prg=$dir/$(basename -- "$prg") || exit
printf '%s\n' "$prg"
radoulov
2009-03-10 14:58:28
A:
Vlad's code is overquoted. Should be:
MY_PATH=`dirname "$0"`
MY_PATH=`( cd "$MY_PATH" && pwd )`
pooryorick
2010-05-03 12:24:53