386BSD 0.1 development

Work on file usr/othersrc/public/shellutils-1.6/shellutils-1.6/src/whoami.c

Co-Authored-By: Lynne Greer Jolitz <ljolitz@cardio.ucsf.edu>
Synthesized-from: 386BSD-0.1

diff --git a/usr/othersrc/public/shellutils-1.6/shellutils-1.6/src/whoami.c b/usr/othersrc/public/shellutils-1.6/shellutils-1.6/src/whoami.c
new file mode 100644 (file)
index 0000000..4a12406
--- /dev/null
+++ b/usr/othersrc/public/shellutils-1.6/shellutils-1.6/src/whoami.c
@@ -0,0 +1,49 @@
+/* whoami -- print effective userid
+   Copyright (C) 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Equivalent to `id -un'. */
+/* Written by Richard Mlynarik. */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include "system.h"
+
+void
+main (argc, argv)
+     int argc;
+     char *argv[];
+{
+  register struct passwd *pw;
+  register uid_t uid;
+
+  if (argc != 1)
+    {
+      fprintf (stderr, "Usage: %s\n", argv[0]);
+      exit (1);
+    }
+
+  uid = geteuid ();
+  pw = getpwuid (uid);
+  if (pw)
+    {
+      puts (pw->pw_name);
+      exit (0);
+    }
+  fprintf (stderr,"%s: cannot find username for UID %u\n", argv[0], uid);
+  exit (1);
+}