[DragonFlyBSD - Submit #2726] Allow reading with small uio->uio_resid or uio->uio_offset > 0 from /proc/X/map

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #2726 has been updated by shamaz.

File procfs_map.c.patch added

UPD: sending a new patch suitable for new version of procfs_map.c  (with respect to commit fc8827e6)

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Submit #2726: Allow reading with small uio->uio_resid or uio->uio_offset > 0 from /proc/X/map
http://bugs.dragonflybsd.org/issues/2726#change-12371

* Author: shamaz
* Status: New
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
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Currently map file in procfs cannot be read with programs like cat
sometimes. It happens if the buffer to be read into cannot hold the entire
content of map file. Call to read returns EFBIG on this occasion, which is
somewhat confusing.

A test:

http://pastebin.com/SrZY3Sr4

It will print -1 on error or 0 on success.

Patch attached. It also contains some changes from FreeBSD

---Files--------------------------------
procfs_map.c.patch (5.39 KB)
procfs_map.c.patch (5.7 KB)


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