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Annotation of src/usr.bin/logname/logname.c, Revision 1.10

1.10    ! schwarze    1: /*     $OpenBSD: logname.c,v 1.9 2015/10/09 01:37:08 deraadt Exp $     */
1.1       deraadt     2: /*     $NetBSD: logname.c,v 1.6 1994/12/22 06:39:32 jtc Exp $  */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1991, 1993, 1994
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
1.5       millert    16:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
1.10    ! schwarze   33: #include <err.h>
1.1       deraadt    34: #include <stdio.h>
                     35: #include <stdlib.h>
                     36: #include <unistd.h>
                     37:
1.10    ! schwarze   38: static void __dead
        !            39: usage(void)
        !            40: {
        !            41:        (void)fprintf(stderr, "usage: logname\n");
        !            42:        exit(1);
        !            43: }
1.1       deraadt    44:
                     45: int
1.6       deraadt    46: main(int argc, char *argv[])
1.1       deraadt    47: {
                     48:        int ch;
                     49:        char *p;
                     50:
1.9       deraadt    51:        if (pledge("stdio", NULL) == -1)
                     52:                err(1, "pledge");
1.1       deraadt    53:
1.3       millert    54:        while ((ch = getopt(argc, argv, "")) != -1)
1.1       deraadt    55:                switch (ch) {
                     56:                default:
                     57:                        usage();
                     58:                }
                     59:
1.10    ! schwarze   60:        if (argc != optind)
1.1       deraadt    61:                usage();
                     62:
                     63:        if ((p = getlogin()) == NULL)
                     64:                err(1, NULL);
1.10    ! schwarze   65:
1.1       deraadt    66:        (void)printf("%s\n", p);
1.10    ! schwarze   67:        return 0;
1.1       deraadt    68: }