* Copyright (c) 1989 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
static char sccsid
[] = "@(#)who.c 5.11 (Berkeley) 6/1/90";
char *t
, *rindex(), *strcpy(), *strncpy(), *ttyname();
/* only entries with both name and line fields */
while (fread((char *)&usr
, sizeof(usr
), 1, ufp
) == 1)
if (*usr
.ut_name
&& *usr
.ut_line
)
case 2: /* who utmp_file */
while (fread((char *)&usr
, sizeof(usr
), 1, ufp
) == 1)
/* search through the utmp and find an entry for this tty */
/* strip any directory component */
while (fread((char *)&usr
, sizeof(usr
), 1, ufp
) == 1)
if (usr
.ut_name
&& !strcmp(usr
.ut_line
, p
)) {
/* well, at least we know what the tty is */
(void)strncpy(usr
.ut_line
, p
, UT_LINESIZE
);
(void)strcpy(usr
.ut_line
, "tty??");
(void)strncpy(usr
.ut_name
, pw
? pw
->pw_name
: "?", UT_NAMESIZE
);
(void)time(&usr
.ut_time
);
(void)fprintf(stderr
, "usage: who [ file ]\n who am i\n");
(void)printf("%-*.*s %-*.*s", UT_NAMESIZE
, UT_NAMESIZE
, up
->ut_name
,
UT_LINESIZE
, UT_LINESIZE
, up
->ut_line
);
(void)printf("%.12s", ctime(&up
->ut_time
) + 4);
printf("\t(%.*s)", UT_HOSTSIZE
, up
->ut_host
);
if (!(ufp
= fopen(name
, "r"))) {
(void)fprintf(stderr
, "who: %s: %s.\n", name
, strerror(errno
));