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ucm: use closefrom instead of close_range
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closefrom is a library function with a fallback mechanism for when the
kernel does not support the close_range syscall.

Also check for the function properly instead of assuming it is available
with _GNU_SOURCE defined.

Closes: https://github.com/alsa-project/alsa-lib/pull/486
Fixes: https://github.com/alsa-project/alsa-lib/issues/485
Signed-off-by: Mike Gilbert <floppym@gentoo.org>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Mike Gilbert 2025-12-08 23:46:17 -05:00 • committed by Jaroslav Kysela
parent 70e413c5bb
commit a068cf08ad
2 changed files with 3 additions and 2 deletions
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1
configure.ac
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@ -52,6 +52,7 @@ dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL AC_PROG_GCC_TRADITIONAL
AC_CHECK_FUNCS([uselocale]) AC_CHECK_FUNCS([uselocale])
AC_CHECK_FUNCS([eaccess]) AC_CHECK_FUNCS([eaccess])
AC_CHECK_DECLS([closefrom])
dnl Enable largefile support dnl Enable largefile support
AC_SYS_LARGEFILE AC_SYS_LARGEFILE

4
src/ucm/ucm_exec.c
View file

@ -259,8 +259,8 @@ int uc_mgr_exec(const char *prog)
close(f); close(f);
#if defined(_GNU_SOURCE) #if HAVE_DECL_CLOSEFROM
close_range(3, maxfd, 0); closefrom(3);
#else #else
for (f = 3; f < maxfd; f++) for (f = 3; f < maxfd; f++)
close(f); close(f);