[Bug libc/2016] New: argp --help infloop, via ARGP_HELP_FMT envvar

[Bug libc/2016] New: argp --help infloop, via ARGP_HELP_FMT envvar

[list+redhat-bugzilla at meyering dot net]

You can make any argp-using program infloop simply by running it
with --help and with something like ARGP_HELP_FMT=rmargin=a in the
environment.  Or use a valid (but small) width: ARGP_HELP_FMT=rmargin=2

  $ time ARGP_HELP_FMT=rmargin=2 tar --help > /dev/null
  ARGP_HELP_FMT=rmargin=2 tar --help > /dev/null  35.49s user 0.17s system 97% cp
u 36.648 total
  [Exit 130 (INT)]

-- 
           Summary: argp --help infloop, via ARGP_HELP_FMT envvar
           Product: glibc
           Version: 2.3.6
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: list+redhat-bugzilla at meyering dot net
                CC: glibc-bugs at sources dot redhat dot com


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[decimal at us dot ibm dot com]

------- Additional Comments From decimal at us dot ibm dot com  2005-12-12 19:10 -------
Do you have a simple testcase handy?

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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[jim at meyering dot net]

------- Additional Comments From jim at meyering dot net  2005-12-12 19:46 -------
Subject: Re:  argp --help infloop, via ARGP_HELP_FMT envvar

"decimal at us dot ibm dot com" <sourceware-bugzilla@sourceware.org> wrote:
> Do you have a simple testcase handy?

No.
FYI, there's already a fix in gnulib:

  http://lists.gnu.org/archive/html/bug-gnulib/2005-12/msg00042.html


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[jim at meyering dot net]

------- Additional Comments From jim at meyering dot net  2005-12-12 20:24 -------
Subject: Re:  argp --help infloop, via ARGP_HELP_FMT envvar

"decimal at us dot ibm dot com" <sourceware-bugzilla@sourceware.org> wrote:
> Do you have a simple testcase handy?

If you need a simple testcase, one of the four in
the glibc manual should do nicely.


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[decimal at us dot ibm dot com]

------- Additional Comments From decimal at us dot ibm dot com  2005-12-12 20:44 -------
I was able to reproduce.

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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[decimal at us dot ibm dot com]

------- Additional Comments From decimal at us dot ibm dot com  2005-12-12 20:47 -------
Created an attachment (id=799)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=799&action=view)
A Minimal Program Using Argp

To reproduce the problem use
gcc -o glibc-2016-test glibc-2016-test.c
ARGP_HELP_FMT=rmargin=2 ./glibc-2016-test --help

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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[decimal at us dot ibm dot com]

------- Additional Comments From decimal at us dot ibm dot com  2005-12-13 19:20 -------
Created an attachment (id=801)
 --> (http://sourceware.org/bugzilla/attachment.cgi?id=801&action=view)
Patch from gnulib to resolve this issue.

This patch was taken from
http://lists.gnu.org/archive/html/bug-gnulib/2005-12/msg00042.html
and resolves the problem. I have tested on ppc64 and ppc.


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[decimal at us dot ibm dot com]

------- Additional Comments From decimal at us dot ibm dot com  2005-12-14 20:52 -------
Sent a note to the gnulib argp maintainer to verify that copyright assignment
has already happened for this fix.

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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[decimal at us dot ibm dot com]

------- Additional Comments From decimal at us dot ibm dot com  2005-12-16 22:22 -------
It seems the copyright assignment is in progress with the FSF.

The gnulib argp maintainer is interested in seeing other fixes get into glibc.
Not sure if there is any interest on the glibc end. Perhaps there is a policy to
only take fixes reported by users? or perhaps the goal would be to track gnulib
more closely if the resources were available to do it?

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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[roland at gnu dot org]

------- Additional Comments From roland at gnu dot org  2005-12-22 01:08 -------
The policy wrt gnulib copies of glibc code is that glibc's trunk is the master
source and gnulib maintainers have previously agreed to submit fixes to glibc
piecemeal as they come up, so as to keep the code in synch.  gnulib maintainers
can contact me to expedite any languishing gnulib patches, and they should
already be aware of this.  Anyone doing glibc bugzilla triage can identify
patches from gnulib maintainers and assign those bugs to me.

For future reference, a case like this does not need a small test case program
supplied.  It is sufficient if a command line using locale or suchlike is a good
test case.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|drepper at redhat dot com   |roland at gnu dot org
             Status|NEW                         |ASSIGNED


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[decimal at us dot ibm dot com]

------- Additional Comments From decimal at us dot ibm dot com  2006-02-09 21:20 -------
Thanks for the info. The maintainer informed me that this was committed to gnulib.

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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2007-09-24 03:19 -------
The attached patch does not only not apply, even after fixing it up it doesn't
solve the problem.  Either it never worked or the gnulib version is sufficiently
different.  Please provide a correct patch.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[pasky at suse dot cz]

------- Additional Comments From pasky at suse dot cz  2010-06-01 03:29 -------
no response

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[jim at meyering dot net]

------- Additional Comments From jim at meyering dot net  2010-06-01 05:40 -------
This bug report is still valid and the bug afflicts rawhide's
glibc-2.12.90-1.x86_64. Running this example from the manual still infloops:

$ cat k.c; gcc k.c; ARGP_HELP_FMT=rmargin=2 ./a.out --help > /dev/null
#include <argp.h>
int main (int argc, char **argv)
{
  argp_parse (0, argc, argv, 0, 0, 0);
  return 0;
}
^C


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |


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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[jim at meyering dot net]

------- Additional Comments From jim at meyering dot net  2010-06-01 10:17 -------
FYI, the referenced patch ensures that the new function, validate_uparams, is
used to reject invalid parameters.  Rerunning my example, built against the
version in gnulib produces this:

a.out: ARGP_HELP_FMT: rmargin value is less than or equal to short-opt-col

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[Bug libc/2016] argp --help infloop, via ARGP_HELP_FMT envvar

[jim at meyering dot net]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|2.3.6                       |2.12


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