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Bug 159310 - Enhance printflags() semantics
Summary: Enhance printflags() semantics
Alias: None
Product: Fedora
Classification: Fedora
Component: strace
Version: rawhide
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Roland McGrath
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2005-06-01 16:41 UTC by Dmitry V. Levin
Modified: 2007-11-30 22:11 UTC (History)
0 users

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Last Closed: 2005-06-01 19:03:49 UTC

Attachments (Terms of Use)
strace-4.5.11-alt-printflags.patch (deleted)
2005-06-01 16:43 UTC, Dmitry V. Levin
no flags Details | Diff

Description Dmitry V. Levin 2005-06-01 16:41:42 UTC
As of cvs snapshot 20050526, the printflags() semantics is error prone.
Client is expected to check return code of this function, which is easy to forget.  There are 32 cases in current codebase where return code is not checked and therefore flag value may be omitted.

For example:
$ strace -e trace=capget getpcaps $$
capget(0x12345678, 12345, {, , })       = 0
Capabilities for `12345': =

I suggest to add third argument to printflags() with similar meaning to the third argument of printxval().  As result, in most cases printflags() return code will be unneeded and clients will look more clear.

Comment 1 Dmitry V. Levin 2005-06-01 16:43:19 UTC
Created attachment 115039 [details]

Proposed change.

Comment 2 Roland McGrath 2005-06-01 19:03:49 UTC
Looks good, thanks for the patch.  It's in.

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