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gh-112970: Detect and use closefrom() when available (#112969)

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glibc-2.34 implements closefrom(3) using the same semantics as on BSD.
Check for closefrom() in configure and use the check result in
fileutils.c, rather than hardcoding a FreeBSD check.

Some implementations of closefrom() return an int. Explicitly discard 
the return value by casting it to void, to avoid future compiler
warnings.

Signed-off-by: Sam James <sam@gentoo.org>
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Sam James 2023-12-12 10:25:27 +00:00 • committed by GitHub
parent 0d2fe6bab0
commit c454e934d3
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5 changed files with 14 additions and 4 deletions
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configure generated vendored
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@ -17225,6 +17225,12 @@ if test "x$ac_cv_func_clock" = xyes
then :
printf "%s\n" "#define HAVE_CLOCK 1" >>confdefs.h
fi
ac_fn_c_check_func "$LINENO" "closefrom" "ac_cv_func_closefrom"
if test "x$ac_cv_func_closefrom" = xyes
then :
printf "%s\n" "#define HAVE_CLOSEFROM 1" >>confdefs.h
fi
ac_fn_c_check_func "$LINENO" "close_range" "ac_cv_func_close_range"
if test "x$ac_cv_func_close_range" = xyes