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[DOC] Clarify IO#autoclose impact on #close

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Mention that autoclose changes the behavior of explicit close in addition to implicit close at IO finalization.
This commit is contained in:
Lars Kanis 2022-03-12 13:06:46 +01:00 committed by Hiroshi SHIBATA
parent 62b3bcba5e
commit 47f8bf50e1
Notes: git 2023-03-01 07:02:30 +00:00 
Merged: https://github.com/ruby/ruby/pull/5647
1 changed files with 6 additions and 6 deletions
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12
io.c
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@ -9549,7 +9549,7 @@ rb_io_s_for_fd(int argc, VALUE *argv, VALUE klass)
* ios.autoclose? -> true or false
*
* Returns +true+ if the underlying file descriptor of _ios_ will be
* closed automatically at its finalization, otherwise +false+.
* closed at its finalization or at calling #close, otherwise +false+.
*/
static VALUE
@ -9567,13 +9567,13 @@ rb_io_autoclose_p(VALUE io)
* Sets auto-close flag.
*
* f = open("/dev/null")
* IO.for_fd(f.fileno)
* # ...
* f.gets # may cause Errno::EBADF
* IO.for_fd(f.fileno).close
* f.gets # raises Errno::EBADF
*
* f = open("/dev/null")
* IO.for_fd(f.fileno).autoclose = false
* # ...
* g = IO.for_fd(f.fileno)
* g.autoclose = false
* g.close
* f.gets # won't cause Errno::EBADF
*/