https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260708
Bug ID: 260708
Summary: Opening /dev/urandom fails with errno=31 (EMLINK)
Product: Base System
Version: 12.2-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Hi Everyone,
I seem to be getting a nonsensical error when opening /dev/urandom.
The code is:
# ifdef O_NOFOLLOW
const int flags = O_RDONLY|O_NOFOLLOW;
# else
const int flags = O_RDONLY;
# endif
m_fd = open("/dev/urandom", flags);
if (m_fd == -1)
throw OS_RNG_Err("open /dev/urandom");
Under GDB, I am seeing an error of EMLINK:
(gdb) p m_fd
$2 = -1
(gdb) p flags
$3 = 256
(gdb) p (int)errno
$4 = 31
(gdb) set output-radix 10
Output radix now set to decimal 10, hex a, octal 12.
(gdb) p (int)errno
$5 = 31
When I lookup the error at
https://www.freebsd.org/cgi/man.cgi?query=errno&sektion=2&manpath=freebsd-release-ports,
it says:
Maximum allowable hard links to a single file
has been exceeded (limit of 32767 hard links per file).
Something sounds a bit off. I am not creating a link, and I doubt there are 32K
links to the file.
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