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Re: [RFC] Add pthread_detach_pwd call.
- From: Florian Weimer <fweimer at redhat dot com>
- To: "Joseph S. Myers" <joseph at codesourcery dot com>
- Cc: Rich Felker <dalias at aerifal dot cx>, OndÅej BÃlka <neleai at seznam dot cz>, libc-alpha at sourceware dot org
- Date: Mon, 21 Oct 2013 14:30:06 +0200
- Subject: Re: [RFC] Add pthread_detach_pwd call.
- Authentication-results: sourceware.org; auth=none
- References: <20131020174109 dot GA17943 at domone dot podge> <20131020222505 dot GK20515 at brightrain dot aerifal dot cx> <5264FD5D dot 6040605 at redhat dot com> <Pine dot LNX dot 4 dot 64 dot 1310211201130 dot 23978 at digraph dot polyomino dot org dot uk>
On 10/21/2013 02:04 PM, Joseph S. Myers wrote:
On Mon, 21 Oct 2013, Florian Weimer wrote:
On 10/21/2013 12:25 AM, Rich Felker wrote:
There is already a clean, portable way to achieve the exact same
thing: the *at functions.
fsetxattrat is missing, though. Probably more.
Feel free to propose/implement new *at functions for glibc. That doesn't
depend on kernel support (although kernel support would be good) because
you can implement them in userspace using /proc/self/fd, just like many
existing fallback implementations for !__ASSUME_ATFCTS.
Interesting. Is constructing such names
static const char procfd = "/proc/self/fd/%d/%s";
race-free? I'm asking because the /proc/self/fd entries are presented
as symbolic links.
Florian Weimer / Red Hat Product Security Team