2 * Copyright (c) 2002 Tim J. Robbins.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/usr.bin/who/who.c,v 1.9.2.4 2002/12/21 00:44:58 tjr Exp $
27 * $DragonFly: src/usr.bin/who/who.c,v 1.4 2004/08/25 01:56:49 dillon Exp $
30 #include <sys/types.h>
31 #include <sys/ioctl.h>
48 static void heading(void);
49 static void process_utmp(FILE *);
50 static void quick(FILE *);
51 static void row(struct utmp *);
52 static int ttywidth(void);
53 static void usage(void);
54 static void whoami(FILE *);
56 static int Hflag; /* Write column headings */
57 static int mflag; /* Show info about current terminal */
58 static int qflag; /* "Quick" mode */
59 static int sflag; /* Show name, line, time */
60 static int Tflag; /* Show terminal state */
61 static int uflag; /* Show idle time */
64 main(int argc, char *argv[])
70 setlocale(LC_TIME, "");
72 while ((ch = getopt(argc, argv, "HTmqsu")) != -1) {
74 case 'H': /* Write column headings */
77 case 'T': /* Show terminal state */
80 case 'm': /* Show info about current terminal */
83 case 'q': /* "Quick" mode */
86 case 's': /* Show name, line, time */
89 case 'u': /* Show idle time */
100 if (argc >= 2 && strcmp(argv[0], "am") == 0 &&
101 (strcmp(argv[1], "i") == 0 || strcmp(argv[1], "I") == 0)) {
102 /* "who am i" or "who am I", equivalent to -m */
114 if ((fp = fopen(file, "r")) == NULL)
139 fprintf(stderr, "usage: who [-HmqsTu] [am I] [file]\n");
147 printf("%-*s ", UT_NAMESIZE, "NAME");
150 printf("%-*s ", UT_LINESIZE, "LINE");
151 printf("%-*s ", 12, "TIME");
154 printf("%-*s", UT_HOSTSIZE, "FROM");
161 char buf[80], tty[sizeof(_PATH_DEV) + UT_LINESIZE];
164 static int d_first = -1;
169 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
171 if (Tflag || uflag) {
172 snprintf(tty, sizeof(tty), "%s%.*s", _PATH_DEV,
173 UT_LINESIZE, ut->ut_line);
176 if (stat(tty, &sb) == 0) {
177 state = sb.st_mode & (S_IWOTH|S_IWGRP) ?
179 idle = time(NULL) - sb.st_mtime;
181 err(1, "Cannot open %s", tty);
185 printf("%-*.*s ", UT_NAMESIZE, UT_NAMESIZE, ut->ut_name);
187 printf("%c ", state);
188 printf("%-*.*s ", UT_LINESIZE, UT_LINESIZE, ut->ut_line);
189 tm = localtime(&ut->ut_time);
190 strftime(buf, sizeof(buf), d_first ? "%e %b %R" : "%b %e %R", tm);
191 printf("%-*s ", 12, buf);
195 else if (idle < 24 * 60 * 60)
196 printf("%02d:%02d ", (int)(idle / 60 / 60),
197 (int)(idle / 60 % 60));
201 if (*ut->ut_host != '\0')
202 printf("(%.*s)", UT_HOSTSIZE, ut->ut_host);
207 process_utmp(FILE *fp)
211 while (fread(&ut, sizeof(ut), 1, fp) == 1)
212 if (*ut.ut_name != '\0')
224 while (fread(&ut, sizeof(ut), 1, fp) == 1) {
225 if (*ut.ut_name == '\0')
227 printf("%-*.*s", UT_NAMESIZE, UT_NAMESIZE, ut.ut_name);
228 if (++col < ncols / (UT_NAMESIZE + 1))
239 printf("# users = %d\n", num);
247 const char *name, *p, *tty;
249 if ((tty = ttyname(STDIN_FILENO)) == NULL)
251 else if ((p = strrchr(tty, '/')) != NULL)
254 /* Search utmp for our tty, dump first matching record. */
255 while (fread(&ut, sizeof(ut), 1, fp) == 1)
256 if (*ut.ut_name != '\0' && strncmp(ut.ut_line, tty,
262 /* Not found; fill the utmp structure with the information we have. */
263 memset(&ut, 0, sizeof(ut));
264 if ((pwd = getpwuid(getuid())) != NULL)
268 strncpy(ut.ut_name, name, UT_NAMESIZE);
269 strncpy(ut.ut_line, tty, UT_LINESIZE);
281 if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0') {
283 width = strtol(cols, &ep, 10);
284 if (errno || width <= 0 || width > INT_MAX || ep == cols ||
286 warnx("invalid COLUMNS environment variable ignored");
290 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1)