.

1 files changed, 170 insertions, 0 deletions

diff --git a/src/users.c b/src/users.c
new file mode 100644
index 000000000..423bce2a1
--- /dev/null
+++ b/src/users.c
@@ -0,0 +1,170 @@
+/* GNU's users.
+   Copyright (C) 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
+
+   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* Written by jla; revised by djm */
+
+#include <config.h>
+#include <getopt.h>
+
+#include "system.h"
+#include "error.h"
+#include "readutmp.h"
+
+/* The name this program was run with. */
+char *program_name;
+
+/* If nonzero, display usage information and exit.  */
+static int show_help;
+
+/* If nonzero, print the version on standard output and exit.  */
+static int show_version;
+
+static struct option const longopts[] =
+{
+  {"help", no_argument, &show_help, 1},
+  {"version", no_argument, &show_version, 1},
+  {NULL, 0, NULL, 0}
+};
+
+static int
+userid_compare (const void *v_a, const void *v_b)
+{
+  char **a = (char **) v_a;
+  char **b = (char **) v_b;
+  return strcmp (*a, *b);
+}
+
+static void
+list_entries_users (int n)
+{
+  register STRUCT_UTMP *this = utmp_contents;
+  char **u;
+  int i;
+  int n_entries;
+
+  n_entries = 0;
+  u = (char **) xmalloc (n * sizeof (u[0]));
+  for (i = 0; i < n; i++)
+    {
+      if (this->ut_name[0]
+#ifdef USER_PROCESS
+	  && this->ut_type == USER_PROCESS
+#endif
+	 )
+	{
+	  char *trimmed_name;
+
+	  trimmed_name = extract_trimmed_name (this);
+
+	  u[n_entries] = trimmed_name;
+	  ++n_entries;
+	}
+      this++;
+    }
+
+  qsort (u, n_entries, sizeof (u[0]), userid_compare);
+
+  for (i = 0; i < n_entries; i++)
+    {
+      int c;
+      fputs (u[i], stdout);
+      c = (i < n_entries-1 ? ' ' : '\n');
+      putchar (c);
+    }
+
+  for (i = 0; i < n_entries; i++)
+    free (u[i]);
+  free (u);
+}
+
+/* Display a list of users on the system, according to utmp file FILENAME. */
+
+static void
+users (const char *filename)
+{
+  int users = read_utmp (filename);
+  list_entries_users (users);
+}
+
+static void
+usage (int status)
+{
+  if (status != 0)
+    fprintf (stderr, _("Try `%s --help' for more information.\n"),
+	     program_name);
+  else
+    {
+      printf (_("Usage: %s [OPTION]... [ FILE ]\n"), program_name);
+      printf (_("\
+Output who is currently logged in according to FILE.\n\
+If FILE is not specified, use %s.  %s as FILE is common.\n\
+\n\
+      --help        display this help and exit\n\
+      --version     output version information and exit\n"),
+	      UTMP_FILE, WTMP_FILE);
+      puts (_("\nReport bugs to <sh-utils-bugs@gnu.ai.mit.edu>."));
+    }
+  exit (status);
+}
+
+int
+main (int argc, char **argv)
+{
+  int optc, longind;
+  program_name = argv[0];
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  while ((optc = getopt_long (argc, argv, "", longopts, &longind)) != -1)
+    {
+      switch (optc)
+	{
+	case 0:
+	  break;
+
+	default:
+	  usage (1);
+	}
+    }
+
+  if (show_version)
+    {
+      printf ("users (%s) %s\n", GNU_PACKAGE, VERSION);
+      exit (0);
+    }
+
+  if (show_help)
+    usage (0);
+
+  switch (argc - optind)
+    {
+    case 0:			/* users */
+      users (UTMP_FILE);
+      break;
+
+    case 1:			/* users <utmp file> */
+      users (argv[optind]);
+      break;
+
+    default:			/* lose */
+      error (0, 0, _("too many arguments"));
+      usage (1);
+    }
+
+  exit (0);
+}