1 files changed, 80 insertions, 0 deletions
diff --git a/awklib/eg/lib/groupawk.in b/awklib/eg/lib/groupawk.in
new file mode 100644
index 00000000..a8103a04
--- /dev/null
+++ b/awklib/eg/lib/groupawk.in
@@ -0,0 +1,80 @@
+# group.awk --- functions for dealing with the group file
+# Arnold Robbins, arnold@gnu.ai.mit.edu, Public Domain
+# May 1993
+
+BEGIN    \
+{
+    # Change to suit your system
+    _gr_awklib = "/usr/local/libexec/awk/"
+}
+function _gr_init(    oldfs, oldrs, olddol0, grcat, n, a, i)
+{
+    if (_gr_inited)
+        return
+
+    oldfs = FS
+    oldrs = RS
+    olddol0 = $0
+    FS = ":"
+    RS = "\n"
+
+    grcat = _gr_awklib "grcat"
+    while ((grcat | getline) > 0) {
+        if ($1 in _gr_byname)
+            _gr_byname[$1] = _gr_byname[$1] "," $4
+        else
+            _gr_byname[$1] = $0
+        if ($3 in _gr_bygid)
+            _gr_bygid[$3] = _gr_bygid[$3] "," $4
+        else
+            _gr_bygid[$3] = $0
+
+        n = split($4, a, "[ \t]*,[ \t]*")
+        for (i = 1; i <= n; i++)
+            if (a[i] in _gr_groupsbyuser)
+                _gr_groupsbyuser[a[i]] = \
+                    _gr_groupsbyuser[a[i]] " " $1
+            else
+                _gr_groupsbyuser[a[i]] = $1
+
+        _gr_bycount[++_gr_count] = $0
+    }
+    close(grcat)
+    _gr_count = 0
+    _gr_inited++
+    FS = oldfs
+    RS = oldrs
+    $0 = olddol0
+}
+function getgrnam(group)
+{
+    _gr_init()
+    if (group in _gr_byname)
+        return _gr_byname[group]
+    return ""
+}
+function getgrgid(gid)
+{
+    _gr_init()
+    if (gid in _gr_bygid)
+        return _gr_bygid[gid]
+    return ""
+}
+function getgruser(user)
+{
+    _gr_init()
+    if (user in _gr_groupsbyuser)
+        return _gr_groupsbyuser[user]
+    return ""
+}
+function getgrent()
+{
+    _gr_init()
+    if (++gr_count in _gr_bycount)
+        return _gr_bycount[_gr_count]
+    return ""
+}
+function endgrent()
+{
+    _gr_count = 0
+}