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From: | address@hidden |
Subject: | bug#18592: FFI should have portable access to ‘errno’ |
Date: | Sun, 25 Jan 2015 21:59:32 +0100 |
I'd like to point out that when calling a function that might set errno in C,
it's usually good practice to set errno to zero immediately before the call,
so as to be sure that any subsequent non-zero errno value was actually
a consequence of the function call:
errno = 0; /* clear errno before the function call */
rtnval = my_func(...);
if (errno != 0) {...}
This should probably be taken into account if you're extending
the FFI to provide access to errno.
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