1 files changed, 118 insertions, 0 deletions
diff --git a/libshouldbeinlibc/ugids-rep.c b/libshouldbeinlibc/ugids-rep.c
new file mode 100644
index 00000000..3e6e59d5
--- /dev/null
+++ b/libshouldbeinlibc/ugids-rep.c
@@ -0,0 +1,118 @@
+/* String representation of ugids
+
+   Copyright (C) 1997 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "ugids.h"
+
+/* Return a string representation of the ids in UGIDS.  SHOW_VALUES and
+   SHOW_NAMES reflect how each id is printed (if SHOW_NAMES is true values
+   are used where names aren't available); if both are true, the
+   `VALUE(NAME)' format is used.  ID_SEP, TYPE_SEP, and HDR_SEP contain the
+   strings that separate, respectively, multiple ids of a particular type
+   (default ","), the various types of ids (default ", "), and the name of
+   each type from its ids (default ": ").  The empty string is returned for
+   an empty list, and 0 for an allocation error.  */
+char *
+ugids_rep (const struct ugids *ugids, int show_values, int show_names,
+	   const char *id_sep, const char *type_sep, const char *hdr_sep)
+{
+  size_t type_sep_len, hdr_sep_len;
+  int first = 1;
+  char *rep = 0;		/* Result */
+  size_t len = 0;		/* Total length of result.  */
+  char *euid_rep = 0, *egid_rep = 0, *auid_rep = 0, *agid_rep = 0;
+
+  /* Calculate the rep for NAME, with ids IDS, returning the rep for the ids
+     in REP, and updates LEN to include everything needed by this type (the
+     length of *REP *plus* the length of NAME and any separators).  True is
+     returned unless an allocation error occurs.  */
+  int type_rep (const char *name, const struct idvec *ids, int is_group,
+		char **rep)
+    {
+      if (ids->num > 0)
+	{
+	  if (first)
+	    first = 0;
+	  else
+	    len += type_sep_len;
+	  len += strlen (name);
+	  len += hdr_sep_len;
+	  *rep =
+	    (is_group ? idvec_gids_rep : idvec_uids_rep)
+	      (ids, show_values, show_names, id_sep);
+	  if (*rep)
+	    len += strlen (*rep);
+	  else
+	    return 0;
+	}
+      return 1;
+    }
+  void add_type_rep (char **to, const char *name, const char *rep)
+    {
+      if (rep)
+	{
+	  if (first)
+	    first = 0;
+	  else
+	    *to = stpcpy (*to, type_sep);
+	  *to = stpcpy (*to, name);
+	  *to = stpcpy (*to, hdr_sep);
+	  *to = stpcpy (*to, rep);
+	}
+    }
+
+  if (! type_sep)
+    type_sep = ", ";
+  if (! hdr_sep)
+    hdr_sep = ": ";
+
+  type_sep_len = strlen (type_sep);
+  hdr_sep_len = strlen (hdr_sep);
+
+  if (type_rep ("euids", &ugids->eff_uids, 0, &euid_rep)
+      && type_rep ("egids", &ugids->eff_gids, 1, &egid_rep)
+      && type_rep ("auids", &ugids->avail_uids, 0, &auid_rep)
+      && type_rep ("agids", &ugids->avail_gids, 1, &agid_rep))
+    {
+      char *p = malloc (len + 1);
+      if (p)
+	{
+	  rep = p;
+	  first = 1;
+	  add_type_rep (&p, "euids", euid_rep);
+	  add_type_rep (&p, "egids", egid_rep);
+	  add_type_rep (&p, "auids", auid_rep);
+	  add_type_rep (&p, "agids", agid_rep);
+	}
+    }
+
+  if (euid_rep)
+    free (euid_rep);
+  if (egid_rep)
+    free (egid_rep);
+  if (auid_rep)
+    free (auid_rep);
+  if (agid_rep)
+    free (agid_rep);
+
+  return rep;
+}