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* [Bug libc/17427] New: RFE: Async-safe access to error strings
@ 2014-09-23 16:14 arequipeno at gmail dot com
2014-10-10 9:58 ` [Bug libc/17427] " fweimer at redhat dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: arequipeno at gmail dot com @ 2014-09-23 16:14 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17427
Bug ID: 17427
Summary: RFE: Async-safe access to error strings
Product: glibc
Version: 2.18
Status: NEW
Severity: enhancement
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: arequipeno at gmail dot com
CC: drepper.fsp at gmail dot com
Currently, the only async-safe method of accessing error message strings is
with sys_errlist and sys_nerr, which are deprecated. If eliminating direct use
of these variables is truly desired, I suggest that an async-safe replacement
is
required.
Implementation-wise, I'm thinking of something roughly equivalent to:
const char *strerror_as_np(int errnum)
{
if (errnum < 0 || errnum >= sys_nerr) {
errno = EINVAL; /* maybe? */
return NULL;
}
return sys_errlist[errnum];
}
I would, however, document the function as a "best effort," which may return
NULL even for a valid and common value of errnum. This should provide plenty
of wiggle room for future changes/standardization. (I can dream!)
For an (IMO) legitimate use of async-safe access to error message strings,
please see the "Pre-exec child process error reporting stuff" portion of
https://github.com/ipilcher/n5550/blob/master/freecusd/err.c.
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* [Bug libc/17427] RFE: Async-safe access to error strings
2014-09-23 16:14 [Bug libc/17427] New: RFE: Async-safe access to error strings arequipeno at gmail dot com
@ 2014-10-10 9:58 ` fweimer at redhat dot com
2020-12-21 2:45 ` jscott at posteo dot net
2020-12-21 11:50 ` adhemerval.zanella at linaro dot org
2 siblings, 0 replies; 4+ messages in thread
From: fweimer at redhat dot com @ 2014-10-10 9:58 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17427
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fweimer at redhat dot com
Flags| |security-
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* [Bug libc/17427] RFE: Async-safe access to error strings
2014-09-23 16:14 [Bug libc/17427] New: RFE: Async-safe access to error strings arequipeno at gmail dot com
2014-10-10 9:58 ` [Bug libc/17427] " fweimer at redhat dot com
@ 2020-12-21 2:45 ` jscott at posteo dot net
2020-12-21 11:50 ` adhemerval.zanella at linaro dot org
2 siblings, 0 replies; 4+ messages in thread
From: jscott at posteo dot net @ 2020-12-21 2:45 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17427
John Scott <jscott at posteo dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jscott at posteo dot net
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* [Bug libc/17427] RFE: Async-safe access to error strings
2014-09-23 16:14 [Bug libc/17427] New: RFE: Async-safe access to error strings arequipeno at gmail dot com
2014-10-10 9:58 ` [Bug libc/17427] " fweimer at redhat dot com
2020-12-21 2:45 ` jscott at posteo dot net
@ 2020-12-21 11:50 ` adhemerval.zanella at linaro dot org
2 siblings, 0 replies; 4+ messages in thread
From: adhemerval.zanella at linaro dot org @ 2020-12-21 11:50 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=17427
Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Assignee|unassigned at sourceware dot org |adhemerval.zanella at linaro dot o
| |rg
Target Milestone|--- |2.32
CC| |adhemerval.zanella at linaro dot o
| |rg
Status|NEW |RESOLVED
--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
This is implemented by 325081b9eb2035f8f025255206889208f330b590 (string: Add
strerrorname_np and strerrordesc_np) which implements both strerrorname_np and
strerrordesc_np GNU extensions.
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end of thread, other threads:[~2020-12-21 11:50 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2014-09-23 16:14 [Bug libc/17427] New: RFE: Async-safe access to error strings arequipeno at gmail dot com
2014-10-10 9:58 ` [Bug libc/17427] " fweimer at redhat dot com
2020-12-21 2:45 ` jscott at posteo dot net
2020-12-21 11:50 ` adhemerval.zanella at linaro dot org
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