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getgroups: document portability issues Because I actually managed to hit deadlock in libvirt's child process due to glibc's mutex use in user database lookup, I figured it is worth documenting the issue for others to be aware of when writing a privileged multithreaded parent app that spawns child processes owned by non-privileged ids. * doc/glibc-functions/initgroups.texi (initgroups): Mention multithread safety. * doc/posix-functions/getpwuid.texi (getpwuid): Likewise. * doc/posix-functions/getpwuid_r.texi (getpwuid_r): Likewise. * doc/glibc-functions/getgrouplist.texi (getgrouplist): Mention getugroups. * doc/posix-functions/getgroups.texi (getgroups): Mention multithread safety and mgetgroups. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Wed, 22 May 2013 14:21:36 -0600
parents 35461659a298
children e4a13d95b503
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@node getgrouplist
@subsection @code{getgrouplist}
@findex getgrouplist

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11 2011-11, Cygwin 1.7.9, mingw, MSVC 9, BeOS.
@end itemize

The Gnulib module @code{getugroups} provides a similar API.