[Bug libc/4690] New: getopt_long "--arg=val" and "--arg val" are not the same for "optional_argument"

[Bug libc/4690] New: getopt_long "--arg=val" and "--arg val" are not the same for "optional_argument"

[david at blue-labs dot org]

When doing long opt processing, --arg=val and --arg val are interchangeable for
either no_argument or required_argument.  However when using optional_argument,
optarg is set only if the form --arg=val is used.  If the form --arg val is used
then the val is reported as an unknown argv option.

Granted that it may be a vague choice in determining that val is intended for
--arg vs. a value of it's own and therefore best left to the single form of
--arg=val, but all documentation related to getopt() and family refers to the
two forms being interchangeable.

I would like to request future releases of glibc document this in their online
manuals and man pages.

Thank you :)

-- 
           Summary: getopt_long "--arg=val" and "--arg val" are not the same
                    for "optional_argument"
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: david at blue-labs dot org
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=4690

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[Bug libc/4690] getopt_long "--arg=val" and "--arg val" are not the same for "optional_argument"

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2007-06-22 19:09 -------
That's how it has to be.  There will be no change.

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           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX


http://sourceware.org/bugzilla/show_bug.cgi?id=4690

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[Bug libc/4690] getopt_long "--arg=val" and "--arg val" are not the same for "optional_argument"

[david at blue-labs dot org]

------- Additional Comments From david at blue-labs dot org  2007-06-22 19:16 -------
It "has to be" undocumented?

Perhaps you simply skimmed over this request.  Is it really a policy to not
document something?

It would be nice if the documentation stated that the two forms are
interchangeable except when using /optional_argument/ where --arg=val is the
only acceptable form because --arg val is entirely ambiguous.

It's a simple matter of correcting the documentation to reflect the actual
implementation in glibc.

Please reconsider adding this small note of distinction to the documentation.

-- 


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[Bug manual/4690] getopt_long "--arg=val" and "--arg val" are not the same for "optional_argument"

[roland at gnu dot org]

------- Additional Comments From roland at gnu dot org  2007-06-22 19:21 -------
Moving to manual

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
          Component|libc                        |manual
         Resolution|WONTFIX                     |


http://sourceware.org/bugzilla/show_bug.cgi?id=4690

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[Bug manual/4690] getopt_long "--arg=val" and "--arg val" are not the same for "optional_argument"

[roland at gnu dot org]

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


http://sourceware.org/bugzilla/show_bug.cgi?id=4690

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[Bug manual/4690] getopt_long "--arg=val" and "--arg val" are not the same for "optional_argument"

[jakub at redhat dot com]

------- Additional Comments From jakub at redhat dot com  2007-07-02 15:38 -------
Can you cite where you saw the two forms are interchangeable?

E.g. man getopt:
A long option normally begins with `--' followed by the long option name.  If
the  option  has  a  required
argument,  it may be written directly after the long option name, separated by
`=', or as the next argument
(ie. separated by whitespace on the command line).  If the option has an 
optional  argument,  it  must  be
written  directly  after the long option name, separated by `=', if present (if
you add the `=' but nothing
behind it, it is interpreted as if no argument was present; this is a slight 
bug,  see  the  BUGS).

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           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING


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