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fix: make zfs_strerror really thread-safe and portable

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#15793 wanted to make zfs_strerror threadsafe, unfortunately, it
turned out that strerror_l() usage was wrong, and also, some libc 
implementations dont have strerror_l().

zfs_strerror() now simply calls original strerror() and copies the 
result to a thread-local buffer, then returns that.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Richard Kojedzinszky <richard@kojedz.in>
Closes #15793
Closes #16640
Closes #16923
This commit is contained in:
Richard Kojedzinszky
2025-01-04 19:33:27 +01:00
committed by Brian Behlendorf
parent 25565403aa
commit 5ba50c8135
2 changed files with 10 additions and 7 deletions
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config/user.m4
+1 -1
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@@ -33,7 +33,7 @@ AC_DEFUN([ZFS_AC_CONFIG_USER], [
ZFS_AC_CONFIG_USER_MAKEDEV_IN_MKDEV
ZFS_AC_CONFIG_USER_ZFSEXEC
AC_CHECK_FUNCS([execvpe issetugid mlockall strerror_l strlcat strlcpy gettid])
AC_CHECK_FUNCS([execvpe issetugid mlockall strlcat strlcpy gettid])
AC_SUBST(RM)
])