2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static const char copyright[] =
39 "@(#) Copyright (c) 1989, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)who.c 8.1 (Berkeley) 6/6/93";
47 static const char rcsid[] =
51 #include <sys/types.h>
63 static void usage __P((void));
64 void output __P((struct utmp *));
77 (void) setlocale(LC_TIME, "");
81 ufp = file(_PATH_UTMP);
82 /* only entries with both name and line fields */
83 while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
84 if (*usr.ut_name && *usr.ut_line)
87 case 2: /* who utmp_file */
90 while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
93 case 3: /* who am i */
94 if (strcmp(argv[1], "am")
95 || (strcmp(argv[2], "I") && strcmp(argv[2], "i")))
98 ufp = file(_PATH_UTMP);
100 /* search through the utmp and find an entry for this tty */
101 if ((p = ttyname(0))) {
102 /* strip any directory component */
103 if ((t = rindex(p, '/')))
105 while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
106 if (*usr.ut_name && !strcmp(usr.ut_line, p)) {
110 /* well, at least we know what the tty is */
111 (void)strncpy(usr.ut_line, p, UT_LINESIZE);
113 (void)strcpy(usr.ut_line, "tty??");
114 pw = getpwuid(getuid());
115 (void)strncpy(usr.ut_name, pw ? pw->pw_name : "?", UT_NAMESIZE);
116 (void)time(&usr.ut_time);
129 (void)fprintf(stderr, "%s\n%s\n",
140 static int d_first = -1;
143 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
145 (void)printf("%-*.*s %-*.*s", UT_NAMESIZE, UT_NAMESIZE, up->ut_name,
146 UT_LINESIZE, UT_LINESIZE, up->ut_line);
147 (void)strftime(buf, sizeof(buf),
148 d_first ? "%e %b %R" : "%b %e %R",
149 localtime(&up->ut_time));
150 (void)printf("%s", buf);
152 printf("\t(%.*s)", UT_HOSTSIZE, up->ut_host);
162 if (!(ufp = fopen(name, "r")))