GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/pax/tty_subs.c Lines: 26 51 51.0 %
Date: 2017-11-13 Branches: 8 24 33.3 %

Line Branch Exec Source
1
/*	$OpenBSD: tty_subs.c,v 1.17 2016/08/26 04:22:13 guenther Exp $	*/
2
/*	$NetBSD: tty_subs.c,v 1.5 1995/03/21 09:07:52 cgd Exp $	*/
3
4
/*-
5
 * Copyright (c) 1992 Keith Muller.
6
 * Copyright (c) 1992, 1993
7
 *	The Regents of the University of California.  All rights reserved.
8
 *
9
 * This code is derived from software contributed to Berkeley by
10
 * Keith Muller of the University of California, San Diego.
11
 *
12
 * Redistribution and use in source and binary forms, with or without
13
 * modification, are permitted provided that the following conditions
14
 * are met:
15
 * 1. Redistributions of source code must retain the above copyright
16
 *    notice, this list of conditions and the following disclaimer.
17
 * 2. Redistributions in binary form must reproduce the above copyright
18
 *    notice, this list of conditions and the following disclaimer in the
19
 *    documentation and/or other materials provided with the distribution.
20
 * 3. Neither the name of the University nor the names of its contributors
21
 *    may be used to endorse or promote products derived from this software
22
 *    without specific prior written permission.
23
 *
24
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34
 * SUCH DAMAGE.
35
 */
36
37
#include <sys/types.h>
38
#include <sys/stat.h>
39
#include <fcntl.h>
40
#include <stdarg.h>
41
#include <stdio.h>
42
#include <string.h>
43
#include <unistd.h>
44
45
#include "pax.h"
46
#include "extern.h"
47
48
/*
49
 * routines that deal with I/O to and from the user
50
 */
51
52
#define DEVTTY		"/dev/tty"	/* device for interactive i/o */
53
static FILE *ttyoutf = NULL;		/* output pointing at control tty */
54
static FILE *ttyinf = NULL;		/* input pointing at control tty */
55
56
/*
57
 * tty_init()
58
 *	try to open the controlling terminal (if any) for this process. if the
59
 *	open fails, future ops that require user input will get an EOF
60
 */
61
62
int
63
tty_init(void)
64
{
65
	int ttyfd;
66
67
200
	if ((ttyfd = open(DEVTTY, O_RDWR | O_CLOEXEC)) >= 0) {
68
100
		if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
69
100
			if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
70
100
				return(0);
71
			(void)fclose(ttyoutf);
72
		}
73
		(void)close(ttyfd);
74
	}
75
76
	if (iflag) {
77
		paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
78
		return(-1);
79
	}
80
	return(0);
81
100
}
82
83
/*
84
 * tty_prnt()
85
 *	print a message using the specified format to the controlling tty
86
 *	if there is no controlling terminal, just return.
87
 */
88
89
void
90
tty_prnt(const char *fmt, ...)
91
{
92
	va_list ap;
93
94
	va_start(ap, fmt);
95
	if (ttyoutf == NULL) {
96
		va_end(ap);
97
		return;
98
	}
99
	(void)vfprintf(ttyoutf, fmt, ap);
100
	va_end(ap);
101
	(void)fflush(ttyoutf);
102
}
103
104
/*
105
 * tty_read()
106
 *	read a string from the controlling terminal if it is open into the
107
 *	supplied buffer
108
 * Return:
109
 *	0 if data was read, -1 otherwise.
110
 */
111
112
int
113
tty_read(char *str, int len)
114
{
115
	if (ttyinf == NULL || fgets(str, len, ttyinf) == NULL)
116
		return(-1);
117
118
	/*
119
	 * strip off that trailing newline
120
	 */
121
	str[strcspn(str, "\n")] = '\0';
122
	return(0);
123
}
124
125
/*
126
 * paxwarn()
127
 *	write a warning message to stderr. if "set" the exit value of pax
128
 *	will be non-zero.
129
 */
130
131
void
132
paxwarn(int set, const char *fmt, ...)
133
{
134
12
	va_list ap;
135
136
6
	va_start(ap, fmt);
137
6
	if (set)
138
		exit_val = 1;
139
	/*
140
	 * when vflag we better ship out an extra \n to get this message on a
141
	 * line by itself
142
	 */
143
6
	if (vflag && vfpart) {
144
		(void)fflush(listf);
145
		(void)fputc('\n', stderr);
146
		vfpart = 0;
147
	}
148
6
	(void)fprintf(stderr, "%s: ", argv0);
149
6
	(void)vfprintf(stderr, fmt, ap);
150
6
	va_end(ap);
151
6
	(void)fputc('\n', stderr);
152
6
}
153
154
/*
155
 * syswarn()
156
 *	write a warning message to stderr. if "set" the exit value of pax
157
 *	will be non-zero.
158
 */
159
160
void
161
syswarn(int set, int errnum, const char *fmt, ...)
162
{
163
12
	va_list ap;
164
165
6
	va_start(ap, fmt);
166
6
	if (set)
167
6
		exit_val = 1;
168
	/*
169
	 * when vflag we better ship out an extra \n to get this message on a
170
	 * line by itself
171
	 */
172
6
	if (vflag && vfpart) {
173
		(void)fflush(listf);
174
		(void)fputc('\n', stderr);
175
		vfpart = 0;
176
	}
177
6
	(void)fprintf(stderr, "%s: ", argv0);
178
6
	(void)vfprintf(stderr, fmt, ap);
179
6
	va_end(ap);
180
181
	/*
182
	 * format and print the errno
183
	 */
184
6
	if (errnum > 0)
185
6
		(void)fprintf(stderr, ": %s", strerror(errnum));
186
6
	(void)fputc('\n', stderr);
187
6
}