Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/calendar/calendar.c	Lines:	37	102	36.3 %
Date:	2017-11-07	Branches:	28	86	32.6 %


/*	$OpenBSD: calendar.c,v 1.35 2015/12/07 18:46:35 espie Exp $	*/

/*
 * Copyright (c) 1989, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <locale.h>
#include <login_cap.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <time.h>
#include <unistd.h>

#include "pathnames.h"
#include "calendar.h"

char *calendarFile = "calendar";  /* default calendar file */
char *calendarHome = ".calendar"; /* HOME */
char *calendarNoMail = "nomail";  /* don't sent mail if this file exists */

struct passwd *pw;
int doall = 0;
int daynames = 0;
time_t f_time = 0;
int bodun_always = 0;

int f_dayAfter = 0; /* days after current date */
int f_dayBefore = 0; /* days before current date */
int f_SetdayAfter = 0; /* calendar invoked with -A */

struct specialev spev[NUMEV];

void childsig(int);

int
main(int argc, char *argv[])
{
	int ch;
	const char *errstr;
	char *caldir;

	(void)setlocale(LC_ALL, "");

	while ((ch = getopt(argc, argv, "abwf:t:A:B:-")) != -1)
		switch (ch) {
		case '-':		/* backward contemptible */
		case 'a':
			if (getuid())
				errx(1, "%s", strerror(EPERM));
			doall = 1;
			break;

		case 'b':
			bodun_always = 1;
			break;

		case 'f': /* other calendar file */
		        calendarFile = optarg;
			break;

		case 't': /* other date, undocumented, for tests */
			if ((f_time = Mktime(optarg)) <= 0)
				errx(1, "specified date is outside allowed range");
			break;

		case 'A': /* days after current date */
			f_dayAfter = strtonum(optarg, 0, INT_MAX, &errstr);
			if (errstr)
				errx(1, "-A %s: %s", optarg, errstr);
			f_SetdayAfter = 1;
			break;

		case 'B': /* days before current date */
			f_dayBefore = strtonum(optarg, 0, INT_MAX, &errstr);
			if (errstr)
				errx(1, "-B %s: %s", optarg, errstr);
			break;

		case 'w':
			daynames = 1;
			break;

		default:
			usage();
		}
	argc -= optind;
	argv += optind;

	if (argc)
		usage();

	if (doall) {
		if (pledge("stdio rpath tmppath fattr getpw id proc exec flock cpath wpath", NULL)
		    == -1)
			err(1, "pledge");
	} else {
		if (pledge("stdio rpath proc exec flock cpath wpath", NULL) == -1)
			err(1, "pledge");
	}

	/* use current time */
	if (f_time <= 0)
	    (void)time(&f_time);

	if (f_dayBefore) {
		/* Move back in time and only look forwards */
		f_dayAfter += f_dayBefore;
		f_time -= SECSPERDAY * f_dayBefore;
		f_dayBefore = 0;
	}
	settime(&f_time);

	if (doall) {
		pid_t kid, deadkid;
		int kidstat, kidreaped, runningkids;
		int acstat;
		struct stat sbuf;
		time_t t;
		unsigned int sleeptime;

		signal(SIGCHLD, childsig);
		runningkids = 0;
		t = time(NULL);
		while ((pw = getpwent()) != NULL) {
			acstat = 0;
			/* Avoid unnecessary forks.  The calendar file is only
			 * opened as the user later; if it can't be opened,
			 * it's no big deal.  Also, get to correct directory.
			 * Note that in an NFS environment root may get EACCES
			 * on a chdir(), in which case we have to fork.  As long as
			 * we can chdir() we can stat(), unless the user is
			 * modifying permissions while this is running.
			 */
			if (chdir(pw->pw_dir)) {
				if (errno == EACCES)
					acstat = 1;
				else
					continue;
			}
			if (stat(calendarFile, &sbuf) != 0) {
				if (chdir(calendarHome)) {
					if (errno == EACCES)
						acstat = 1;
					else
						continue;
				}
				if (stat(calendarNoMail, &sbuf) == 0 ||
				    stat(calendarFile, &sbuf) != 0)
					continue;
			}
			sleeptime = USERTIMEOUT;
			switch ((kid = fork())) {
			case -1:	/* error */
				warn("fork");
				continue;
			case 0:	/* child */
				(void)setpgid(getpid(), getpid());
				(void)setlocale(LC_ALL, "");
				if (setusercontext(NULL, pw, pw->pw_uid,
				    LOGIN_SETALL ^ LOGIN_SETLOGIN))
					err(1, "unable to set user context (uid %u)",
					    pw->pw_uid);
				if (acstat) {
					if (chdir(pw->pw_dir) ||
					    stat(calendarFile, &sbuf) != 0 ||
					    chdir(calendarHome) ||
					    stat(calendarNoMail, &sbuf) == 0 ||
					    stat(calendarFile, &sbuf) != 0)
						exit(0);
				}
				cal();
				exit(0);
			}
			/* parent: wait a reasonable time, then kill child if
			 * necessary.
			 */
			runningkids++;
			kidreaped = 0;
			do {
				sleeptime = sleep(sleeptime);
				/* Note that there is the possibility, if the sleep
				 * stops early due to some other signal, of the child
				 * terminating and not getting detected during the next
				 * sleep.  In that unlikely worst case, we just sleep
				 * too long for that user.
				 */
				for (;;) {
					deadkid = waitpid(-1, &kidstat, WNOHANG);
					if (deadkid <= 0)
						break;
					runningkids--;
					if (deadkid == kid) {
						kidreaped = 1;
						sleeptime = 0;
					}
				}
			} while (sleeptime);

			if (!kidreaped) {
				/* It doesn't _really_ matter if the kill fails, e.g.
				 * if there's only a zombie now.
				 */
				if (getpgid(kid) != getpgrp())
					(void)killpg(getpgid(kid), SIGTERM);
				else
					(void)kill(kid, SIGTERM);
				warnx("uid %u did not finish in time", pw->pw_uid);
			}
			if (time(NULL) - t >= SECSPERDAY)
				errx(2, "'calendar -a' took more than a day; "
				    "stopped at uid %u",
				    pw->pw_uid);
		}
		for (;;) {
			deadkid = waitpid(-1, &kidstat, WNOHANG);
			if (deadkid <= 0)
				break;
			runningkids--;
		}
		if (runningkids)
			warnx("%d child processes still running when "
			    "'calendar -a' finished", runningkids);
	} else if ((caldir = getenv("CALENDAR_DIR")) != NULL) {
		if(!chdir(caldir))
			cal();
	} else
		cal();

	exit(0);
}


void
usage(void)
{
	(void)fprintf(stderr,
	    "usage: calendar [-abw] [-A num] [-B num] [-f calendarfile] "
	    "[-t [[[cc]yy]mm]dd]\n");
	exit(1);
}


void
childsig(int signo)
{
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: calendar.c,v 1.35 2015/12/07 18:46:35 espie Exp $ */
2
3			/*
4			* Copyright (c) 1989, 1993, 1994
5			* The Regents of the University of California. All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			* 3. Neither the name of the University nor the names of its contributors
16			* may be used to endorse or promote products derived from this software
17			* without specific prior written permission.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29			* SUCH DAMAGE.
30			*/
31
32			#include <sys/stat.h>
33			#include <sys/types.h>
34			#include <sys/wait.h>
35			#include <err.h>
36			#include <errno.h>
37			#include <locale.h>
38			#include <login_cap.h>
39			#include <pwd.h>
40			#include <signal.h>
41			#include <stdio.h>
42			#include <stdlib.h>
43			#include <string.h>
44			#include <limits.h>
45			#include <time.h>
46			#include <unistd.h>
47
48			#include "pathnames.h"
49			#include "calendar.h"
50
51			char calendarFile = "calendar"; / default calendar file */
52			char calendarHome = ".calendar"; / HOME */
53			char calendarNoMail = "nomail"; / don't sent mail if this file exists */
54
55			struct passwd *pw;
56			int doall = 0;
57			int daynames = 0;
58			time_t f_time = 0;
59			int bodun_always = 0;
60
61			int f_dayAfter = 0; /* days after current date */
62			int f_dayBefore = 0; /* days before current date */
63			int f_SetdayAfter = 0; /* calendar invoked with -A */
64
65			struct specialev spev[NUMEV];
66
67			void childsig(int);
68
69			int
70			main(int argc, char *argv[])
71			{
72			int ch;
73		13160	const char *errstr;
74			char *caldir;
75
76		6580	(void)setlocale(LC_ALL, "");
77
78	✓✓	26319	while ((ch = getopt(argc, argv, "abwf:t:A:B:-")) != -1)
79	✗✓✗✓ ✓✗✗✗ ✗	13159	switch (ch) {
80			case '-': /* backward contemptible */
81			case 'a':
82	✗✓	1	if (getuid())
83			errx(1, "%s", strerror(EPERM));
84		1	doall = 1;
85		1	break;
86
87			case 'b':
88			bodun_always = 1;
89			break;
90
91			case 'f': /* other calendar file */
92		6579	calendarFile = optarg;
93		6579	break;
94
95			case 't': /* other date, undocumented, for tests */
96	✓✗	6579	if ((f_time = Mktime(optarg)) <= 0)
97			errx(1, "specified date is outside allowed range");
98			break;
99
100			case 'A': /* days after current date */
101			f_dayAfter = strtonum(optarg, 0, INT_MAX, &errstr);
102			if (errstr)
103			errx(1, "-A %s: %s", optarg, errstr);
104			f_SetdayAfter = 1;
105			break;
106
107			case 'B': /* days before current date */
108			f_dayBefore = strtonum(optarg, 0, INT_MAX, &errstr);
109			if (errstr)
110			errx(1, "-B %s: %s", optarg, errstr);
111			break;
112
113			case 'w':
114			daynames = 1;
115			break;
116
117			default:
118			usage();
119			}
120		6580	argc -= optind;
121		6580	argv += optind;
122
123	✗✓	6580	if (argc)
124			usage();
125
126	✓✓	6580	if (doall) {
127	✗✓	2	if (pledge("stdio rpath tmppath fattr getpw id proc exec flock cpath wpath", NULL)
128		1	== -1)
129			err(1, "pledge");
130			} else {
131	✗✓	6579	if (pledge("stdio rpath proc exec flock cpath wpath", NULL) == -1)
132			err(1, "pledge");
133			}
134
135			/* use current time */
136	✓✓	6580	if (f_time <= 0)
137		1	(void)time(&f_time);
138
139	✗✓	6580	if (f_dayBefore) {
140			/* Move back in time and only look forwards */
141			f_dayAfter += f_dayBefore;
142			f_time -= SECSPERDAY * f_dayBefore;
143			f_dayBefore = 0;
144			}
145		6580	settime(&f_time);
146
147	✓✓	6580	if (doall) {
148			pid_t kid, deadkid;
149		1	int kidstat, kidreaped, runningkids;
150			int acstat;
151		1	struct stat sbuf;
152			time_t t;
153			unsigned int sleeptime;
154
155		1	signal(SIGCHLD, childsig);
156			runningkids = 0;
157		1	t = time(NULL);
158	✓✓	68	while ((pw = getpwent()) != NULL) {
159			acstat = 0;
160			/* Avoid unnecessary forks. The calendar file is only
161			* opened as the user later; if it can't be opened,
162			* it's no big deal. Also, get to correct directory.
163			* Note that in an NFS environment root may get EACCES
164			* on a chdir(), in which case we have to fork. As long as
165			* we can chdir() we can stat(), unless the user is
166			* modifying permissions while this is running.
167			*/
168	✓✓	66	if (chdir(pw->pw_dir)) {
169	✓✗	9	if (errno == EACCES)
170			acstat = 1;
171			else
172			continue;
173			}
174	✓✗	57	if (stat(calendarFile, &sbuf) != 0) {
175	✓✗	57	if (chdir(calendarHome)) {
176	✓✗	57	if (errno == EACCES)
177			acstat = 1;
178			else
179			continue;
180			}
181			if (stat(calendarNoMail, &sbuf) == 0 \|\|
182			stat(calendarFile, &sbuf) != 0)
183			continue;
184			}
185			sleeptime = USERTIMEOUT;
186			switch ((kid = fork())) {
187			case -1: /* error */
188			warn("fork");
189			continue;
190			case 0: /* child */
191			(void)setpgid(getpid(), getpid());
192			(void)setlocale(LC_ALL, "");
193			if (setusercontext(NULL, pw, pw->pw_uid,
194			LOGIN_SETALL ^ LOGIN_SETLOGIN))
195			err(1, "unable to set user context (uid %u)",
196			pw->pw_uid);
197			if (acstat) {
198			if (chdir(pw->pw_dir) \|\|
199			stat(calendarFile, &sbuf) != 0 \|\|
200			chdir(calendarHome) \|\|
201			stat(calendarNoMail, &sbuf) == 0 \|\|
202			stat(calendarFile, &sbuf) != 0)
203			exit(0);
204			}
205			cal();
206			exit(0);
207			}
208			/* parent: wait a reasonable time, then kill child if
209			* necessary.
210			*/
211			runningkids++;
212			kidreaped = 0;
213			do {
214			sleeptime = sleep(sleeptime);
215			/* Note that there is the possibility, if the sleep
216			* stops early due to some other signal, of the child
217			* terminating and not getting detected during the next
218			* sleep. In that unlikely worst case, we just sleep
219			* too long for that user.
220			*/
221			for (;;) {
222			deadkid = waitpid(-1, &kidstat, WNOHANG);
223			if (deadkid <= 0)
224			break;
225			runningkids--;
226			if (deadkid == kid) {
227			kidreaped = 1;
228			sleeptime = 0;
229			}
230			}
231			} while (sleeptime);
232
233			if (!kidreaped) {
234			/* It doesn't _really_ matter if the kill fails, e.g.
235			* if there's only a zombie now.
236			*/
237			if (getpgid(kid) != getpgrp())
238			(void)killpg(getpgid(kid), SIGTERM);
239			else
240			(void)kill(kid, SIGTERM);
241			warnx("uid %u did not finish in time", pw->pw_uid);
242			}
243			if (time(NULL) - t >= SECSPERDAY)
244			errx(2, "'calendar -a' took more than a day; "
245			"stopped at uid %u",
246			pw->pw_uid);
247			}
248			for (;;) {
249		1	deadkid = waitpid(-1, &kidstat, WNOHANG);
250	✗✓	1	if (deadkid <= 0)
251			break;
252			runningkids--;
253			}
254	✗✓	1	if (runningkids)
255			warnx("%d child processes still running when "
256			"'calendar -a' finished", runningkids);
257	✗✓	6580	} else if ((caldir = getenv("CALENDAR_DIR")) != NULL) {
258			if(!chdir(caldir))
259			cal();
260			} else
261		6579	cal();
262
263			exit(0);
264			}
265
266
267			void
268			usage(void)
269			{
270			(void)fprintf(stderr,
271			"usage: calendar [-abw] [-A num] [-B num] [-f calendarfile] "
272			"[-t [[[cc]yy]mm]dd]\n");
273			exit(1);
274			}
275
276
277			void
278			childsig(int signo)
279			{
280			}