LXR busybox/coreutils/whoami.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * Mini whoami implementation for busybox
   4 *
   5 * Copyright (C) 2000  Edward Betts <edward@debian.org>.
   6 *
   7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8 */
   9//config:config WHOAMI
  10//config:       bool "whoami (2.9 kb)"
  11//config:       default y
  12//config:       help
  13//config:       whoami is used to print the username of the current
  14//config:       user id (same as id -un).
  15
  16//applet:IF_WHOAMI(APPLET_NOFORK(whoami, whoami, BB_DIR_USR_BIN, BB_SUID_DROP, whoami))
  17
  18//kbuild:lib-$(CONFIG_WHOAMI) += whoami.o
  19
  20/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
  21
  22//usage:#define whoami_trivial_usage
  23//usage:       ""
  24//usage:#define whoami_full_usage "\n\n"
  25//usage:       "Print the user name associated with the current effective user id"
  26
  27#include "libbb.h"
  28
  29int whoami_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  30int whoami_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  31{
  32        if (argv[1])
  33                bb_show_usage();
  34
  35        /* Will complain and die if username not found */
  36        puts(xuid2uname(geteuid()));
  37
  38        return fflush_all();
  39}
  40