Date: Mon, 19 Nov 2001 07:49:10 -0800 (PST) From: Magnus Backstrom <b@etek.chalmers.se> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/32106: Scripts with #!/interpreter paths longer than 64 bytes don't work. Message-ID: <200111191549.fAJFnAl10476@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 32106
>Category: kern
>Synopsis: Scripts with #!/interpreter paths longer than 64 bytes don't work.
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Nov 19 07:50:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: Magnus Backstrom
>Release: 4.4-STABLE and 5.0-CURRENT
>Organization:
Chalmers UofT
>Environment:
FreeBSD j0.etek.chalmers.se 4.4-STABLE FreeBSD 4.4-STABLE #0: Thu Nov 1 09:35:50 CET 2001 b@j0.etek.chalmers.se:/usr/src/sys/compile/J0 i386
>Description:
If an interpreter pathname is longer than about 64 characters, i.e.
#!/you/have/a/slightly/longer/than/usual/path/to/your/interpreter,
/bin/sh gets used instead and your script may break.
>How-To-Repeat:
x> mkdir -p /tmp/this/is/a/slightly/too/long/path/to/the/interpreter
x> ln -s /usr/bin/awk \
/tmp/this/is/a/slightly/too/long/path/to/the/interpreter
x> cat > /tmp/test.awk
#!/tmp/this/is/a/slightly/too/long/path/to/the/interpreter/awk -f
{ 1 }
x> chmod +x /tmp/test.awk
x> /tmp/test.awk
{: Command not found.
x>
>Fix:
Change line 39 of /usr/src/sys/sys/imgact.h from
#define MAXSHELLCMDLEN 64
to something more sensible, e g
#define MAXSHELLCMDLEN 512
This doesn't seem to break anything.
>Release-Note:
>Audit-Trail:
>Unformatted:
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200111191549.fAJFnAl10476>