[BusyBox 0001380]: /usr/bin/[ gives "[: ]: unknown operand" message
bugs at busybox.net
bugs at busybox.net
Tue Jun 5 15:44:18 UTC 2007
The following issue has been SUBMITTED.
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http://busybox.net/bugs/view.php?id=1380
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Reported By: dmaizer
Assigned To: BusyBox
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Project: BusyBox
Issue ID: 1380
Category: Other
Reproducibility: always
Severity: major
Priority: normal
Status: assigned
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Date Submitted: 06-05-2007 08:44 PDT
Last Modified: 06-05-2007 08:44 PDT
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Summary: /usr/bin/[ gives "[: ]: unknown operand" message
Description:
We are working in an Apache (httpd 2.2.3) suexec CGI scripts environment
and our CGI scripts need to provide full paths to all applets/programs
used, so we have something like the following in the CGI script:
if /usr/bin/[ $# -lt 1 ]; then
/bin/echo "sitediag: too few arguments"
/bin/echo "Try sitediag --help for more information"
exit 1
fi
However - this gives the error:
[: ]: unknown operand
Meaning that the "]" closing bracket is being recognized as an unknown
operand. But of course this bracket is needed to close the test...
If we remove the /usr/bin prefix from [ - then it works and gives the
expected echo messages above.
I tried looking at busybox code (being no expert of that code) and found
the following in coreutils/test.c:
if (*t_wp != NULL && *++t_wp != NULL) {
bb_error_msg("%s: unknown operand", *t_wp);
return 2;
}
My guess is that somehow using the pathname causes that condition above to
be true, but I haven't been able to find out why yet (I started looking
from ash.c and "lower" to see why this happens, but haven't been able to
find anything meaningful so far - hopefully someone who knows the code
better can provide a clue or a fix.
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Issue History
Date Modified Username Field Change
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06-05-07 08:44 dmaizer New Issue
06-05-07 08:44 dmaizer Status new => assigned
06-05-07 08:44 dmaizer Assigned To => BusyBox
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