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Am Tue, 11 Oct 2011 22:42:00 -0700
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schrieb Canek Peláez Valdés <caneko@×××××.com>:
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> On Tue, Oct 11, 2011 at 10:35 PM, William Kenworthy |
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> <billk@×××××××××.au> wrote: |
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> > I have been checking my system for some deep seated problems and in |
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> > the process, ran across the fact that "equery files |
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> > sys-apps/coreutils-8.7" shows a file included called "/usr/bin/[" - |
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> > thats right, left square bracket! |
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> > |
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> > Is that a bug or if real, what would you use it for? It doesnt |
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> > seem to be on the file system ... |
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> > |
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> > moriah ~ # /usr/bin/[ |
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> > /usr/bin/[: missing `]' |
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> > moriah ~ # |
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> > |
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> > doesnt show much! |
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> |
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> Relax. It's an alias for "test" |
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technically it's not an alias, but different binaries
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% ls -l /usr/bin/\[
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-rwxr-xr-x 1 root root 35096 Jan 20 2011 /usr/bin/[
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% ls -l /usr/bin/test
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-rwxr-xr-x 1 root root 31000 Jan 20 2011 /usr/bin/test
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built from the same source file coreutils/src/test.c with a
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#define LBRACKET
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that mainly changes the behavior of the argument parser in case it is
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built as [.
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>, so instead of using |
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> |
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> if test blah; then |
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> ... |
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> fi |
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> |
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> in bash, you can use |
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> |
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> if [ blah ]; then |
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> ... |
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> fi |
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> |
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> Just do /usr/bin/[ --help to get an idea. It has been there since I |
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> started using Linux, if I remember correctly, many years ago. |
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> |
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> Regards. |
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