K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2020-10-23T23:56:00.653339Z
K 7
svn:log
V 506
warnx: Save errno across calls that might change it.

When warn() family of functions is being used after err_set_file() has
been set to, for example, /dev/null, errno is being clobbered,
rendering it unreliable after, for example, procstat_getpathname()
when it is supposed to emit a warning. Then the errno is changed to
Inappropriate ioctl for device, destroying the original value (via
calls to fprintf()functions).

Submitted by: Juraj Lutter
Differential Revision: https://reviews.freebsd.org/D26871

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