On Thu, Sep 15, 2011 at 11:36 AM, Peng Haitao <penght@xxxxxxxxxxxxxx> wrote: > > The function getttyent() returns a pointer to the static variable, so it is not > thread-safe. The functions setttyent() and endttyent() use a static variable "tf", > so they are not thread-safe. The function getttynam() calls unsafe function > getttyent(), so it is not thread-safe. Applied. Thanks! Michael > Signed-off-by: Peng Haitao <penght@xxxxxxxxxxxxxx> > --- > man3/getttyent.3 | 19 ++++++++++++++++++- > 1 files changed, 18 insertions(+), 1 deletions(-) > > diff --git a/man3/getttyent.3 b/man3/getttyent.3 > index 1cf8ebc..a4e9b17 100644 > --- a/man3/getttyent.3 > +++ b/man3/getttyent.3 > @@ -1,7 +1,7 @@ > .\" Copyright 2002 walter harms (walter.harms@xxxxxxxxxxxxxxxxxxxxxxxxxxx) > .\" Distributed under GPL > .\" > -.TH GETTTYENT 3 2002-07-18 "GNU" "Linux Programmer's Manual" > +.TH GETTTYENT 3 2011-09-15 "GNU" "Linux Programmer's Manual" > .SH NAME > getttyent, getttynam, setttyent, endttyent \- get ttys file entry > .SH SYNOPSIS > @@ -66,6 +66,23 @@ can be: > #define TTY_ON 0x01 /* enable logins (start ty_getty program) */ > #define TTY_SECURE 0x02 /* allow UID 0 to login */ > .fi > +.SH ATTRIBUTES > +.SS Multithreading (see pthreads(7)) > +The > +.BR getttyent () > +returns a pointer to the static variable, so it is not thread-safe. > +.LP > +The > +.BR setttyent () > +and > +.BR endttyent () > +use a static variable, so they are not thread-safe. > +.LP > +The > +.BR getttynam () > +calls thread-unsafe function > +.BR getttyent () > +so it is not thread-safe. > .SH "CONFORMING TO" > Not in POSIX.1-2001. > Present on the BSDs, and perhaps other systems. > -- > 1.7.1 > > -- > Best Regards, > Peng Haitao > > -- > 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 -- 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
