Add functions to get system user names, group names

Note from committer:
I removed the part that adds grp.h to AC_CHECK_HEADERS and

+#ifdef HAVE_GRP_H
 #include <grp.h>
+#endif

to src/dired.c, because the latter has unconditionally included grp.h
since 2003, and uses it eg in stat_gname.

* configure.in (AC_CHECK_FUNCS): Add getpwent, endpwent, getgrent, endgrent.

* src/dired.c (Fsystem_users, Fsystem_groups): New functions.
(syms_of_dired): Add them.

Fixes: debbugs:7900

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 8d551e06f85..a7da9e1ad5b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-04-17  Dmitry Antipov  <dmantipov@yandex.ru>
+
+        * configure.in (AC_CHECK_FUNCS):
+        Add getpwent, endpwent, getgrent, endgrent. (Bug#7900)
+
 2012-04-16  Glenn Morris  <rgm@gnu.org>
 
         * configure.in (NS_HAVE_NSINTEGER): Remove unnecessary variable.