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* [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE. @ 2022-08-08 17:32 carlos at redhat dot com 2022-08-08 17:33 ` [Bug stdio/29459] " carlos at redhat dot com ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: carlos at redhat dot com @ 2022-08-08 17:32 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29459 Bug ID: 29459 Summary: fwrite does not return EPIPE when underlying write fails with EPIPE. Product: glibc Version: 2.36 Status: NEW Severity: normal Priority: P2 Component: stdio Assignee: unassigned at sourceware dot org Reporter: carlos at redhat dot com Target Milestone: --- This was reported downstream for CentOS 9 Stream here: https://bugzilla.redhat.com/show_bug.cgi?id=2112672 The issue is an upstream issue that needs review. The test case is attached from the downstream issue. An strace shows the issue clearly: 1659979752.806415 write(1, "hello\n", 6) = 6 1659979752.806467 write(2, "1. fwrite wrote 6 bytes and ferror is 0\n", 40) = 40 1659979752.806517 write(1, "hello\n", 6) = -1 EPIPE (Broken pipe) 1659979752.806548 --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=202616, si_uid=1000} --- 1659979752.806563 write(2, "2. fwrite wrote 6 bytes and ferror is 1\n", 40) = 40 The underlying write fails with EPIPE, but fwrite doesn't itself fail. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug stdio/29459] fwrite does not return EPIPE when underlying write fails with EPIPE. 2022-08-08 17:32 [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE carlos at redhat dot com @ 2022-08-08 17:33 ` carlos at redhat dot com 2022-08-08 17:33 ` carlos at redhat dot com ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: carlos at redhat dot com @ 2022-08-08 17:33 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29459 Carlos O'Donell <carlos at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://bugzilla.redhat.com | |/show_bug.cgi?id=2112672 -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug stdio/29459] fwrite does not return EPIPE when underlying write fails with EPIPE. 2022-08-08 17:32 [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE carlos at redhat dot com 2022-08-08 17:33 ` [Bug stdio/29459] " carlos at redhat dot com @ 2022-08-08 17:33 ` carlos at redhat dot com 2022-08-08 17:35 ` carlos at redhat dot com ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: carlos at redhat dot com @ 2022-08-08 17:33 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29459 --- Comment #1 from Carlos O'Donell <carlos at redhat dot com> --- Created attachment 14264 --> https://sourceware.org/bugzilla/attachment.cgi?id=14264&action=edit test-fwrite.c -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug stdio/29459] fwrite does not return EPIPE when underlying write fails with EPIPE. 2022-08-08 17:32 [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE carlos at redhat dot com 2022-08-08 17:33 ` [Bug stdio/29459] " carlos at redhat dot com 2022-08-08 17:33 ` carlos at redhat dot com @ 2022-08-08 17:35 ` carlos at redhat dot com 2022-08-08 17:50 ` schwab@linux-m68k.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: carlos at redhat dot com @ 2022-08-08 17:35 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29459 --- Comment #2 from Carlos O'Donell <carlos at redhat dot com> --- POSIX says it shall fail with EPIPE: https://pubs.opengroup.org/onlinepubs/9699919799/functions/fputc.html# "An attempt is made to write to a pipe or FIFO that is not open for reading by any process. A SIGPIPE signal shall also be sent to the thread." -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug stdio/29459] fwrite does not return EPIPE when underlying write fails with EPIPE. 2022-08-08 17:32 [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE carlos at redhat dot com ` (2 preceding siblings ...) 2022-08-08 17:35 ` carlos at redhat dot com @ 2022-08-08 17:50 ` schwab@linux-m68k.org 2022-08-08 19:19 ` carlos at redhat dot com 2022-08-08 19:57 ` sam at gentoo dot org 5 siblings, 0 replies; 7+ messages in thread From: schwab@linux-m68k.org @ 2022-08-08 17:50 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29459 --- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> --- How exactly is the test program called? -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug stdio/29459] fwrite does not return EPIPE when underlying write fails with EPIPE. 2022-08-08 17:32 [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE carlos at redhat dot com ` (3 preceding siblings ...) 2022-08-08 17:50 ` schwab@linux-m68k.org @ 2022-08-08 19:19 ` carlos at redhat dot com 2022-08-08 19:57 ` sam at gentoo dot org 5 siblings, 0 replies; 7+ messages in thread From: carlos at redhat dot com @ 2022-08-08 19:19 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29459 --- Comment #4 from Carlos O'Donell <carlos at redhat dot com> --- (In reply to Andreas Schwab from comment #3) > How exactly is the test program called? ./fwrite -l hello 5000 | head -n1 Such that head terminates and closes the pipe after reading one line. -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug stdio/29459] fwrite does not return EPIPE when underlying write fails with EPIPE. 2022-08-08 17:32 [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE carlos at redhat dot com ` (4 preceding siblings ...) 2022-08-08 19:19 ` carlos at redhat dot com @ 2022-08-08 19:57 ` sam at gentoo dot org 5 siblings, 0 replies; 7+ messages in thread From: sam at gentoo dot org @ 2022-08-08 19:57 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=29459 Sam James <sam at gentoo dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sam at gentoo dot org -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-08-08 19:57 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-08-08 17:32 [Bug stdio/29459] New: fwrite does not return EPIPE when underlying write fails with EPIPE carlos at redhat dot com 2022-08-08 17:33 ` [Bug stdio/29459] " carlos at redhat dot com 2022-08-08 17:33 ` carlos at redhat dot com 2022-08-08 17:35 ` carlos at redhat dot com 2022-08-08 17:50 ` schwab@linux-m68k.org 2022-08-08 19:19 ` carlos at redhat dot com 2022-08-08 19:57 ` sam at gentoo dot org
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