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* [Bug locale/31143] New: Let iconv_open return EMFILE if RLIMIT_NOFILE is hit
@ 2023-12-12 2:00 jengelh at inai dot de
2023-12-12 9:26 ` [Bug locale/31143] " fweimer at redhat dot com
0 siblings, 1 reply; 2+ messages in thread
From: jengelh at inai dot de @ 2023-12-12 2:00 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=31143
Bug ID: 31143
Summary: Let iconv_open return EMFILE if RLIMIT_NOFILE is hit
Product: glibc
Version: 2.38
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: locale
Assignee: unassigned at sourceware dot org
Reporter: jengelh at inai dot de
Target Milestone: ---
Consider a program that opens a lot of file descriptors, by chance so happens
to stay just barely under the limit, and at some point uses iconv_open.
Pathalogical testcase:
#include <iconv.h>
#include <sys/resource.h>
#include <stdio.h>
int main()
{
struct rlimit rl = {3,3};
if (setrlimit(RLIMIT_NOFILE, &rl) != 0)
perror("setrlimit");
iconv_t cd = iconv_open("UTF-8", "windows-1254//IGNORE");
if (cd == (iconv_t)-1)
perror("iconv_open");
}
== Observed behavior
On a typical linux-glibc system, this will report:
iconv_open: Invalid argument
== Expected
iconv_open: Too many files open
glibc iconv is implemented with shared plugins (/usr/lib/gconv), thus the
implementation is susceptible to fd limits. Though EINVAL is not incorrect per
se (no module loaded - no charset available), it could help the admin to see an
EMFILE errno.
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* [Bug locale/31143] Let iconv_open return EMFILE if RLIMIT_NOFILE is hit
2023-12-12 2:00 [Bug locale/31143] New: Let iconv_open return EMFILE if RLIMIT_NOFILE is hit jengelh at inai dot de
@ 2023-12-12 9:26 ` fweimer at redhat dot com
0 siblings, 0 replies; 2+ messages in thread
From: fweimer at redhat dot com @ 2023-12-12 9:26 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=31143
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |22040
CC| |fweimer at redhat dot com
--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
This depends on accurate tracking of errno values from system calls during
dlopen (and, ugh, dlsym).
Referenced Bugs:
https://sourceware.org/bugzilla/show_bug.cgi?id=22040
[Bug 22040] dlopen: Provide more information on the root cause of a failure
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2023-12-12 2:00 [Bug locale/31143] New: Let iconv_open return EMFILE if RLIMIT_NOFILE is hit jengelh at inai dot de
2023-12-12 9:26 ` [Bug locale/31143] " fweimer at redhat dot com
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