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50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini whoami implementation for busybox
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*
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* Copyright (C) 2000 Edward Betts <edward@debian.org>.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <pwd.h>
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static const char whoami_usage[] = "whoami\n\n"
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"Print the user name associated with the current effective user id.\n"
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"Same as id -un.\n";
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extern int whoami_main(int argc, char **argv)
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{
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struct passwd *pw;
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uid_t uid;
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if (argc > 1)
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usage(whoami_usage);
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uid = geteuid();
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pw = getpwuid(uid);
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if (pw) {
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puts(pw->pw_name);
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exit(TRUE);
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}
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fprintf(stderr, "%s: cannot find username for UID %u\n", argv[0],
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(unsigned) uid);
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exit(FALSE);
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}
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