https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253422
Bug ID: 253422
Summary: unnecessary "signal SIGPIPE" sending in dofilewrite.
Product: Base System
Version: Unspecified
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 222347
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=222347&action=edit
diff for this bug.
current code in dofilewrite will send SIGPIPE once there is error of EPIPE,
While SIGPIPE is just needed on socket and pipe operation. this is defined in
POSIX standard, also with change it can be compatible with more Linux
application.
Here is one example:
in function nfslock_write, it call nfslockdans, and it's possible that
nfslockdans encounter EPIPE error.
application's expectation is jut got write error with return error EPIPE,
while freeBSD kernel send extra signal SIGPIPE, this will cause application
killed by unexpected signal.
https://reviews.freebsd.org/D28562
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