Date: Mon, 01 Jun 2015 21:09:26 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 200580] superfluous/unnecessary endhostent() does close(0) by accident. libc resolver dns fd close Message-ID: <bug-200580-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200580 Bug ID: 200580 Summary: superfluous/unnecessary endhostent() does close(0) by accident. libc resolver dns fd close Product: Base System Version: 10.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: freebsd-bugs@FreeBSD.org Reporter: oh5nxo@gmail.com Calling endhostent(), when such a call is not needed, ends up closing fd 0 by accident. main() { endhostent(); } Breakpoint 2, 0x281a8dc0 in close () from /lib/libc.so.7 (gdb) where #0 0x281a8dc0 in close () from /lib/libc.so.7 #1 0x28152518 in __res_nclose () from /lib/libc.so.7 #2 0x2817c585 in __dns_getanswer () from /lib/libc.so.7 #3 0x080485b3 in main () at endhostent_bug.c:4 hopo $ truss ./a.out ... close(0) = 0 (0x0) ... process exit, rval = 0 Except the usual runtime chores, close(0) is the only visible systemcall. -- You are receiving this mail because: You are the assignee for the bug.
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