[Octave-bug-tracker] [bug #47820] Uncomprehesive behaviors for functions that are not recognized in configure

[Tatsuro MATSUOKA]

URL:
  <http://savannah.gnu.org/bugs/?47820>

                 Summary: Uncomprehesive behaviors for functions that are not
recognized in configure
                 Project: GNU Octave
            Submitted by: tmacchant
            Submitted on: 2016年05月02日 03時13分26秒
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Feature Request
                  Status: None
             Assigned to: None
         Originator Name: Tatsuro MATSUOKA
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.2
        Operating System: Any

    _______________________________________________________

Details:

This is discussed in the thread:

http://octave.1599824.n4.nabble.com/fork-for-microsoft-windows-native-but-not-Cygwin-td4676646.html

However, I noticed that the feature are neither specific to fork nor specific
to the platform.

The some functions implemented in syscalls.cc and oct-syscalls.cc apparently
work but not in reality it failed to recognized in configure process.

Current example fork on windows.


>> fork()
ans = -1



>> help fork
'fork' is a built-in function from the file libinterp/corefcn/syscalls.cc

 -- Built-in Function: [PID, MSG] = fork ()
     Create a copy of the current process.

     Fork can return one of the following values:

     > 0
          You are in the parent process.  The value returned from 'fork'
          is the process id of the child process.  You should probably
          arrange to wait for any child processes to exit.

     0
          You are in the child process.  You can call 'exec' to start
          another process.  If that fails, you should probably call
          'exit'.

     < 0
          The call to 'fork' failed for some reason.  You must take
          evasive action.  A system dependent error message will be
          waiting in MSG.

Additional help for built-in functions and operators is
available in the online version of the manual.  Use the command
'doc <topic>' to search the manual index.

Help and information about Octave is also available on the WWW
at http://www.octave.org and via the address@hidden
mailing list.
octave.org and via the address@hidden
mailing list.



>> [a,b]=fork()
a = -1
b = fork: not supported on this system


Of course,

>> fork()  returns -1 indicates for fork() does not work
correctly and suggest to execute fork() as two variables return
function.   

The "help fork" does not refer to "not supported".

This is a feature request rather than a bug report.
But I hope that octave behaviors are kind enough for those who are not octave
experts.




    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?47820>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/