Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/who/who.c	Lines:	0	130	0.0 %
Date:	2017-11-07	Branches:	0	104	0.0 %


/*	$OpenBSD: who.c,v 1.27 2015/10/21 16:06:57 millert Exp $	*/
/*	$NetBSD: who.c,v 1.4 1994/12/07 04:28:49 jtc Exp $	*/

/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Michael Fischbein.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 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. 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
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <paths.h>
#include <pwd.h>
#include <utmp.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <err.h>
#include <locale.h>

void  output(struct utmp *);
void  output_labels(void);
void  who_am_i(FILE *);
void  usage(void);
FILE *file(char *);

int only_current_term;		/* show info about the current terminal only */
int show_term;			/* show term state */
int show_idle;			/* show idle time */
int show_labels;		/* show column labels */
int show_quick;			/* quick, names only */

#define NAME_WIDTH	8
#define HOST_WIDTH	45

int hostwidth = HOST_WIDTH;
char *mytty;

int
main(int argc, char *argv[])
{
	struct utmp usr;
	FILE *ufp;
	char *t;
	int c;

	setlocale(LC_ALL, "");

	if (pledge("stdio rpath getpw flock cpath wpath", NULL) == -1)
		err(1, "pledge");

	if ((mytty = ttyname(0))) {
		/* strip any directory component */
		if ((t = strrchr(mytty, '/')))
			mytty = t + 1;
	}

	only_current_term = show_term = show_idle = show_labels = 0;
	show_quick = 0;
	while ((c = getopt(argc, argv, "HmqTu")) != -1) {
		switch (c) {
		case 'H':
			show_labels = 1;
			break;
		case 'm':
			only_current_term = 1;
			break;
		case 'q':
			show_quick = 1;
			break;
		case 'T':
			show_term = 1;
			break;
		case 'u':
			show_idle = 1;
			break;
		default:
			usage();
			/* NOTREACHED */
		}
	}
	argc -= optind;
	argv += optind;

	if (show_quick) {
		only_current_term = show_term = show_idle = show_labels = 0;
	}

	if (show_term)
		hostwidth -= 2;
	if (show_idle)
		hostwidth -= 6;

	if (show_labels)
		output_labels();

	switch (argc) {
	case 0:					/* who */
		ufp = file(_PATH_UTMP);

		if (only_current_term) {
			who_am_i(ufp);
		} else if (show_quick) {
			int count = 0;

			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1) {
				if (*usr.ut_name && *usr.ut_line) {
					(void)printf("%-*.*s ", NAME_WIDTH,
						UT_NAMESIZE, usr.ut_name);
					if ((++count % 8) == 0)
						(void) printf("\n");
				}
			}
			if (count % 8)
				(void) printf("\n");
			(void) printf ("# users=%d\n", count);
		} else {
			/* only entries with both name and line fields */
			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
				if (*usr.ut_name && *usr.ut_line)
					output(&usr);
		}
		break;
	case 1:					/* who utmp_file */
		ufp = file(*argv);

		if (only_current_term) {
			who_am_i(ufp);
		} else if (show_quick) {
			int count = 0;

			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1) {
				if (*usr.ut_name && *usr.ut_line) {
					(void)printf("%-*.*s ", NAME_WIDTH,
						UT_NAMESIZE, usr.ut_name);
					if ((++count % 8) == 0)
						(void) printf("\n");
				}
			}
			if (count % 8)
				(void) printf("\n");
			(void) printf ("# users=%d\n", count);
		} else {
			/* all entries */
			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
				output(&usr);
		}
		break;
	case 2:					/* who am i */
		ufp = file(_PATH_UTMP);
		who_am_i(ufp);
		break;
	default:
		usage();
		/* NOTREACHED */
	}
	exit(0);
}

void
who_am_i(FILE *ufp)
{
	struct utmp usr;
	struct passwd *pw;

	/* search through the utmp and find an entry for this tty */
	if (mytty) {
		while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
			if (*usr.ut_name && !strcmp(usr.ut_line, mytty)) {
				output(&usr);
				return;
			}
		/* well, at least we know what the tty is */
		(void)strncpy(usr.ut_line, mytty, UT_LINESIZE);
	} else
		(void)strncpy(usr.ut_line, "tty??", UT_LINESIZE);

	pw = getpwuid(getuid());
	(void)strncpy(usr.ut_name, pw ? pw->pw_name : "?", UT_NAMESIZE);
	(void)time(&usr.ut_time);
	*usr.ut_host = '\0';
	output(&usr);
}

void
output(struct utmp *up)
{
	struct stat sb;
	char line[sizeof(_PATH_DEV) + sizeof (up->ut_line)];
	char state = '?';
	static time_t now = 0;
	time_t idle = 0;

	if (show_term || show_idle) {
		if (now == 0)
			time(&now);

		memset(line, 0, sizeof line);
		strlcpy(line, _PATH_DEV, sizeof line);
		strlcat(line, up->ut_line, sizeof line);

		if (stat(line, &sb) == 0) {
			state = (sb.st_mode & 020) ? '+' : '-';
			idle = now - sb.st_atime;
		} else {
			state = '?';
			idle = 0;
		}

	}

	(void)printf("%-*.*s ", NAME_WIDTH, UT_NAMESIZE, up->ut_name);

	if (show_term) {
		(void)printf("%c ", state);
	}

	(void)printf("%-*.*s ", UT_LINESIZE, UT_LINESIZE, up->ut_line);
	(void)printf("%.12s ", ctime(&up->ut_time) + 4);

	if (show_idle) {
		if (idle < 60)
			(void)printf("  .   ");
		else if (idle < (24 * 60 * 60))
			(void)printf("%02d:%02d ",
				     ((int)idle / (60 * 60)),
				     ((int)idle % (60 * 60)) / 60);
		else
			(void)printf(" old  ");
	}

	if (*up->ut_host)
		printf("  (%.*s)", hostwidth, up->ut_host);
	(void)putchar('\n');
}

void
output_labels(void)
{
	(void)printf("%-*.*s ", NAME_WIDTH, UT_NAMESIZE, "USER");

	if (show_term)
		(void)printf("S ");

	(void)printf("%-*.*s ", UT_LINESIZE, UT_LINESIZE, "LINE");
	(void)printf("WHEN         ");

	if (show_idle)
		(void)printf("IDLE  ");

	(void)printf("  %.*s", hostwidth, "FROM");

	(void)putchar('\n');
}

FILE *
file(char *name)
{
	FILE *ufp;

	if (!(ufp = fopen(name, "r"))) {
		err(1, "%s", name);
		/* NOTREACHED */
	}
	if (show_term || show_idle) {
		if (pledge("stdio rpath getpw flock cpath wpath", NULL) == -1)
			err(1, "pledge");
	} else {
		if (pledge("stdio getpw flock rpath cpath wpath", NULL) == -1)
			err(1, "pledge");
	}
	return(ufp);
}

void
usage(void)
{
	(void)fprintf(stderr, "usage: who [-HmqTu] [file]\n       who am i\n");
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: who.c,v 1.27 2015/10/21 16:06:57 millert Exp $ */
2			/* $NetBSD: who.c,v 1.4 1994/12/07 04:28:49 jtc Exp $ */
3
4			/*
5			* Copyright (c) 1989, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* This code is derived from software contributed to Berkeley by
9			* Michael Fischbein.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36			#include <sys/types.h>
37			#include <sys/stat.h>
38			#include <paths.h>
39			#include <pwd.h>
40			#include <utmp.h>
41			#include <stdio.h>
42			#include <string.h>
43			#include <stdlib.h>
44			#include <unistd.h>
45			#include <time.h>
46			#include <err.h>
47			#include <locale.h>
48
49			void output(struct utmp *);
50			void output_labels(void);
51			void who_am_i(FILE *);
52			void usage(void);
53			FILE file(char );
54
55			int only_current_term; /* show info about the current terminal only */
56			int show_term; /* show term state */
57			int show_idle; /* show idle time */
58			int show_labels; /* show column labels */
59			int show_quick; /* quick, names only */
60
61			#define NAME_WIDTH 8
62			#define HOST_WIDTH 45
63
64			int hostwidth = HOST_WIDTH;
65			char *mytty;
66
67			int
68			main(int argc, char *argv[])
69			{
70			struct utmp usr;
71			FILE *ufp;
72			char *t;
73			int c;
74
75			setlocale(LC_ALL, "");
76
77			if (pledge("stdio rpath getpw flock cpath wpath", NULL) == -1)
78			err(1, "pledge");
79
80			if ((mytty = ttyname(0))) {
81			/* strip any directory component */
82			if ((t = strrchr(mytty, '/')))
83			mytty = t + 1;
84			}
85
86			only_current_term = show_term = show_idle = show_labels = 0;
87			show_quick = 0;
88			while ((c = getopt(argc, argv, "HmqTu")) != -1) {
89			switch (c) {
90			case 'H':
91			show_labels = 1;
92			break;
93			case 'm':
94			only_current_term = 1;
95			break;
96			case 'q':
97			show_quick = 1;
98			break;
99			case 'T':
100			show_term = 1;
101			break;
102			case 'u':
103			show_idle = 1;
104			break;
105			default:
106			usage();
107			/* NOTREACHED */
108			}
109			}
110			argc -= optind;
111			argv += optind;
112
113			if (show_quick) {
114			only_current_term = show_term = show_idle = show_labels = 0;
115			}
116
117			if (show_term)
118			hostwidth -= 2;
119			if (show_idle)
120			hostwidth -= 6;
121
122			if (show_labels)
123			output_labels();
124
125			switch (argc) {
126			case 0: /* who */
127			ufp = file(_PATH_UTMP);
128
129			if (only_current_term) {
130			who_am_i(ufp);
131			} else if (show_quick) {
132			int count = 0;
133
134			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1) {
135			if (usr.ut_name && usr.ut_line) {
136			(void)printf("%-.s ", NAME_WIDTH,
137			UT_NAMESIZE, usr.ut_name);
138			if ((++count % 8) == 0)
139			(void) printf("\n");
140			}
141			}
142			if (count % 8)
143			(void) printf("\n");
144			(void) printf ("# users=%d\n", count);
145			} else {
146			/* only entries with both name and line fields */
147			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
148			if (usr.ut_name && usr.ut_line)
149			output(&usr);
150			}
151			break;
152			case 1: /* who utmp_file */
153			ufp = file(*argv);
154
155			if (only_current_term) {
156			who_am_i(ufp);
157			} else if (show_quick) {
158			int count = 0;
159
160			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1) {
161			if (usr.ut_name && usr.ut_line) {
162			(void)printf("%-.s ", NAME_WIDTH,
163			UT_NAMESIZE, usr.ut_name);
164			if ((++count % 8) == 0)
165			(void) printf("\n");
166			}
167			}
168			if (count % 8)
169			(void) printf("\n");
170			(void) printf ("# users=%d\n", count);
171			} else {
172			/* all entries */
173			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
174			output(&usr);
175			}
176			break;
177			case 2: /* who am i */
178			ufp = file(_PATH_UTMP);
179			who_am_i(ufp);
180			break;
181			default:
182			usage();
183			/* NOTREACHED */
184			}
185			exit(0);
186			}
187
188			void
189			who_am_i(FILE *ufp)
190			{
191			struct utmp usr;
192			struct passwd *pw;
193
194			/* search through the utmp and find an entry for this tty */
195			if (mytty) {
196			while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
197			if (*usr.ut_name && !strcmp(usr.ut_line, mytty)) {
198			output(&usr);
199			return;
200			}
201			/* well, at least we know what the tty is */
202			(void)strncpy(usr.ut_line, mytty, UT_LINESIZE);
203			} else
204			(void)strncpy(usr.ut_line, "tty??", UT_LINESIZE);
205
206			pw = getpwuid(getuid());
207			(void)strncpy(usr.ut_name, pw ? pw->pw_name : "?", UT_NAMESIZE);
208			(void)time(&usr.ut_time);
209			*usr.ut_host = '\0';
210			output(&usr);
211			}
212
213			void
214			output(struct utmp *up)
215			{
216			struct stat sb;
217			char line[sizeof(_PATH_DEV) + sizeof (up->ut_line)];
218			char state = '?';
219			static time_t now = 0;
220			time_t idle = 0;
221
222			if (show_term \|\| show_idle) {
223			if (now == 0)
224			time(&now);
225
226			memset(line, 0, sizeof line);
227			strlcpy(line, _PATH_DEV, sizeof line);
228			strlcat(line, up->ut_line, sizeof line);
229
230			if (stat(line, &sb) == 0) {
231			state = (sb.st_mode & 020) ? '+' : '-';
232			idle = now - sb.st_atime;
233			} else {
234			state = '?';
235			idle = 0;
236			}
237
238			}
239
240			(void)printf("%-.s ", NAME_WIDTH, UT_NAMESIZE, up->ut_name);
241
242			if (show_term) {
243			(void)printf("%c ", state);
244			}
245
246			(void)printf("%-.s ", UT_LINESIZE, UT_LINESIZE, up->ut_line);
247			(void)printf("%.12s ", ctime(&up->ut_time) + 4);
248
249			if (show_idle) {
250			if (idle < 60)
251			(void)printf(" . ");
252			else if (idle < (24 * 60 * 60))
253			(void)printf("%02d:%02d ",
254			((int)idle / (60 * 60)),
255			((int)idle % (60 * 60)) / 60);
256			else
257			(void)printf(" old ");
258			}
259
260			if (*up->ut_host)
261			printf(" (%.*s)", hostwidth, up->ut_host);
262			(void)putchar('\n');
263			}
264
265			void
266			output_labels(void)
267			{
268			(void)printf("%-.s ", NAME_WIDTH, UT_NAMESIZE, "USER");
269
270			if (show_term)
271			(void)printf("S ");
272
273			(void)printf("%-.s ", UT_LINESIZE, UT_LINESIZE, "LINE");
274			(void)printf("WHEN ");
275
276			if (show_idle)
277			(void)printf("IDLE ");
278
279			(void)printf(" %.*s", hostwidth, "FROM");
280
281			(void)putchar('\n');
282			}
283
284			FILE *
285			file(char *name)
286			{
287			FILE *ufp;
288
289			if (!(ufp = fopen(name, "r"))) {
290			err(1, "%s", name);
291			/* NOTREACHED */
292			}
293			if (show_term \|\| show_idle) {
294			if (pledge("stdio rpath getpw flock cpath wpath", NULL) == -1)
295			err(1, "pledge");
296			} else {
297			if (pledge("stdio getpw flock rpath cpath wpath", NULL) == -1)
298			err(1, "pledge");
299			}
300			return(ufp);
301			}
302
303			void
304			usage(void)
305			{
306			(void)fprintf(stderr, "usage: who [-HmqTu] [file]\n who am i\n");
307			exit(1);
308			}