Hello Haitao, I was comparing some of the MT-Safety markings in man-pages versus the glibc manual (https://www.gnu.org/software/libc/manual/html_mono/libc.html) I found four cases that seem to contradict. Are there errors in either the man pages or in the glibc manual? == ctermid.3 MT-Unsafe race:ctermid/!s glibc: MT-Safe man-pages and glibc manual disagree (man-pages seems to be more precise than glibc). == getcwd.3 MT-Safe env glibc: MT-Safe man-pages and glibc manual disagree on "env" (man-pages seems to be more precise than glibc). == getlogin.3 MT-Unsafe race:cuserid/!string locale glibc: MT-Unsafe race:getlogin race:utent sig:ALRM timer locale man-pages and glibc manual disagree on "race:cuserid/!string" versus "race:getlogin" == regex.3 MT-Safe env glibc: MT-Safe locale man-pages and glibc manual disagree on "env" versus "locale" == Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html