On Wed, Sep 7, 2011 at 3:13 AM, Peng Haitao <penght@xxxxxxxxxxxxxx> wrote: > > The functions getgrnam() and getgrgid() return a pointer to a static area which > is overwritten by a subsequent call to them. So they are thread-unsafe. I've applied this patch. Thanks, Michael > Signed-off-by: Peng Haitao <penght@xxxxxxxxxxxxxx> > --- > man3/getgrnam.3 | 15 ++++++++++++++- > 1 files changed, 14 insertions(+), 1 deletions(-) > > diff --git a/man3/getgrnam.3 b/man3/getgrnam.3 > index e4afa3e..cbbdc74 100644 > --- a/man3/getgrnam.3 > +++ b/man3/getgrnam.3 > @@ -28,7 +28,7 @@ > .\" Modified 1993-07-24 by Rik Faith (faith@xxxxxxxxxx) > .\" Modified 2003-11-15 by aeb > .\" > -.TH GETGRNAM 3 2010-10-21 "" "Linux Programmer's Manual" > +.TH GETGRNAM 3 2011-09-07 "" "Linux Programmer's Manual" > .SH NAME > getgrnam, getgrnam_r, getgrgid, getgrgid_r \- get group file entry > .SH SYNOPSIS > @@ -199,6 +199,19 @@ Insufficient buffer space supplied. > .TP > .I /etc/group > local group database file > +.SH ATTRIBUTES > +.SS Multithreading (see pthreads(7)) > +The two functions > +.BR getgrnam () > +and > +.BR getgrgid () > +are not thread-safe. > +.LP > +The two functions > +.BR getgrnam_r () > +and > +.BR getgrgid_r () > +are thread-safe. > .SH "CONFORMING TO" > SVr4, 4.3BSD, POSIX.1-2001. > .SH NOTES > -- > 1.7.1 > > -- > Best Regards, > Peng Haitao > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Author of "The Linux Programming Interface"; http://man7.org/tlpi/ -- 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
