New POSIX process group API

[Favonia]

API changes to Posix.Process in order to have two new features:

1. A different type for POSIX process group ID from POSIX process ID

2. Access to full power of POSIX process group API

Please see the following page for more information:  POSIX process group API reform proposal

[Favonia]

patch to the package base

[Favonia]

Discussion on the libraries list has just started. No consensus has reached yet and this ticket is more like a place to hold patches and test cases. Please make any comments on the libraries list, thanks.

[Favonia]

patch to the package unix

[Favonia]

Please ignore the attachment:0001-Change-the-POSIX-process-group-API.-trac-5167.2.patch , thanks.

[Favonia]

test cases for the package unix (version 3)

[Favonia]

patch to the package unix (version 3)

[Favonia]

The discussion thread has survived for two weeks on the mailing list. The patches have been modified according to Simon's suggestion except the name newProcess[For]. Please review attachment:0001-Change-the-POSIX-process-group-API.-trac-5167.patch attachment:0002-Test-cases-for-the-new-process-group-API.patch (and ignore other patch files).

PS: I need help in the documentation since I do not speak English. Please feel free to modify/improve the descriptions of functions.

[simonmar]

Committed, thanks!

changeset:ff80c44c25ab6233fdd0180275c9981400007c1c changeset:6f88d3dd6e107c996b701b7f4fccaef171440722

(these links won't work until we import multiple repos into the GHC Trac)