Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libutil/pty.c	Lines:	32	45	71.1 %
Date:	2017-11-07	Branches:	12	21	57.1 %


/*	$OpenBSD: pty.c,v 1.21 2017/04/20 17:48:30 nicm Exp $	*/

/*-
 * Copyright (c) 1990, 1993
 *	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/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <grp.h>
#include <sys/tty.h>

#include "util.h"

int
getptmfd(void)
{
	return (open(PATH_PTMDEV, O_RDWR|O_CLOEXEC));
}

int
openpty(int *amaster, int *aslave, char *name, struct termios *termp,
    struct winsize *winp)
{
	int ptmfd;

	if ((ptmfd = getptmfd()) == -1)
		return (-1);
	if (fdopenpty(ptmfd, amaster, aslave, name, termp, winp) == -1) {
		close(ptmfd);
		return (-1);
	}
	close(ptmfd);
	return (0);
}

int
fdopenpty(int ptmfd, int *amaster, int *aslave, char *name,
    struct termios *termp, struct winsize *winp)
{
	int master, slave;
	struct ptmget ptm;

	/*
	 * Use /dev/ptm and the PTMGET ioctl to get a properly set up and
	 * owned pty/tty pair.
	 */
	if (ioctl(ptmfd, PTMGET, &ptm) == -1)
		return (-1);

	master = ptm.cfd;
	slave = ptm.sfd;
	if (name) {
		/*
		 * Manual page says "at least 16 characters".
		 */
		strlcpy(name, ptm.sn, 16);
	}
	*amaster = master;
	*aslave = slave;
	if (termp)
		(void) tcsetattr(slave, TCSAFLUSH, termp);
	if (winp)
		(void) ioctl(slave, TIOCSWINSZ, winp);
	return (0);
}

pid_t
forkpty(int *amaster, char *name, struct termios *termp, struct winsize *winp)
{
	int ptmfd;
	pid_t pid;

	if ((ptmfd = getptmfd()) == -1)
		return (-1);
	if ((pid = fdforkpty(ptmfd, amaster, name, termp, winp)) == -1) {
		close(ptmfd);
		return (-1);
	}
	close(ptmfd);
	return (pid);
}

pid_t
fdforkpty(int ptmfd, int *amaster, char *name, struct termios *termp,
    struct winsize *winp)
{
	int master, slave;
	pid_t pid;

	if (fdopenpty(ptmfd, &master, &slave, name, termp, winp) == -1)
		return (-1);
	switch (pid = fork()) {
	case -1:
		(void) close(master);
		(void) close(slave);
		return (-1);
	case 0:
		/*
		 * child
		 */
		(void) close(master);
		login_tty(slave);
		return (0);
	}
	/*
	 * parent
	 */
	*amaster = master;
	(void) close(slave);
	return (pid);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: pty.c,v 1.21 2017/04/20 17:48:30 nicm Exp $ */
2
3			/*-
4			* Copyright (c) 1990, 1993
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/types.h>
33			#include <sys/stat.h>
34			#include <sys/ioctl.h>
35			#include <fcntl.h>
36			#include <termios.h>
37			#include <errno.h>
38			#include <unistd.h>
39			#include <stdio.h>
40			#include <string.h>
41			#include <grp.h>
42			#include <sys/tty.h>
43
44			#include "util.h"
45
46			int
47			getptmfd(void)
48			{
49		4282	return (open(PATH_PTMDEV, O_RDWR\|O_CLOEXEC));
50			}
51
52			int
53			openpty(int amaster, int aslave, char name, struct termios termp,
54			struct winsize *winp)
55			{
56			int ptmfd;
57
58	✗✓	1450	if ((ptmfd = getptmfd()) == -1)
59			return (-1);
60	✗✓	1450	if (fdopenpty(ptmfd, amaster, aslave, name, termp, winp) == -1) {
61		725	close(ptmfd);
62			return (-1);
63			}
64			close(ptmfd);
65		725	return (0);
66		725	}
67
68			int
69			fdopenpty(int ptmfd, int amaster, int aslave, char *name,
70			struct termios termp, struct winsize winp)
71			{
72			int master, slave;
73		4282	struct ptmget ptm;
74
75			/*
76			* Use /dev/ptm and the PTMGET ioctl to get a properly set up and
77			* owned pty/tty pair.
78			*/
79	✗✓	2141	if (ioctl(ptmfd, PTMGET, &ptm) == -1)
80			return (-1);
81
82		2141	master = ptm.cfd;
83		2141	slave = ptm.sfd;
84	✓✓	2141	if (name) {
85			/*
86			* Manual page says "at least 16 characters".
87			*/
88		716	strlcpy(name, ptm.sn, 16);
89		716	}
90		2141	*amaster = master;
91		2141	*aslave = slave;
92	✗✓	2141	if (termp)
93			(void) tcsetattr(slave, TCSAFLUSH, termp);
94	✓✓	2141	if (winp)
95		1416	(void) ioctl(slave, TIOCSWINSZ, winp);
96		2141	return (0);
97		2141	}
98
99			pid_t
100			forkpty(int amaster, char name, struct termios termp, struct winsize winp)
101			{
102			int ptmfd;
103			pid_t pid;
104
105	✗✓	2832	if ((ptmfd = getptmfd()) == -1)
106			return (-1);
107	✗✓	2832	if ((pid = fdforkpty(ptmfd, amaster, name, termp, winp)) == -1) {
108		1416	close(ptmfd);
109			return (-1);
110			}
111			close(ptmfd);
112		1416	return (pid);
113		1416	}
114
115			pid_t
116			fdforkpty(int ptmfd, int amaster, char name, struct termios *termp,
117			struct winsize *winp)
118			{
119		2832	int master, slave;
120			pid_t pid;
121
122	✗✓	1416	if (fdopenpty(ptmfd, &master, &slave, name, termp, winp) == -1)
123			return (-1);
124	✗✗✓	1416	switch (pid = fork()) {
125			case -1:
126			(void) close(master);
127			(void) close(slave);
128			return (-1);
129			case 0:
130			/*
131			* child
132			*/
133			(void) close(master);
134			login_tty(slave);
135			return (0);
136			}
137			/*
138			* parent
139			*/
140		1416	*amaster = master;
141		1416	(void) close(slave);
142		1416	return (pid);
143		1416	}