busybox/coreutils/whoami.c

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/* vi: set sw=4 ts=4: */
/*
* Mini whoami implementation for busybox
*
* Copyright (C) 2000 Edward Betts <edward@debian.org>.
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config WHOAMI
//config: bool "whoami"
//config: default y
//config: help
//config: whoami is used to print the username of the current
//config: user id (same as id -un).
//applet:IF_WHOAMI(APPLET_NOFORK(whoami, whoami, BB_DIR_USR_BIN, BB_SUID_DROP, whoami))
//kbuild:lib-$(CONFIG_WHOAMI) += whoami.o
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/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
//usage:#define whoami_trivial_usage
//usage: ""
//usage:#define whoami_full_usage "\n\n"
//usage: "Print the user name associated with the current effective user id"
#include "libbb.h"
int whoami_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int whoami_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
if (argv[1])
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bb_show_usage();
/* Will complain and die if username not found */
puts(xuid2uname(geteuid()));
return fflush_all();
}