1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/* $OpenBSD: tty_subs.c,v 1.12 2003/06/02 23:32:09 millert Exp $ */
/* $NetBSD: tty_subs.c,v 1.5 1995/03/21 09:07:52 cgd Exp $ */
/*-
* Copyright (c) 1992 Keith Muller.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego.
*
* 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.
*/
#ifndef lint
#if 0
static const char sccsid[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94";
#else
static const char rcsid[] = "$OpenBSD: tty_subs.c,v 1.12 2003/06/02 23:32:09 millert Exp $";
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "pax.h"
#include "extern.h"
#include <stdarg.h>
/*
* routines that deal with I/O to and from the user
*/
#define DEVTTY "/dev/tty" /* device for interactive i/o */
static FILE *ttyoutf = NULL; /* output pointing at control tty */
static FILE *ttyinf = NULL; /* input pointing at control tty */
/*
* tty_init()
* try to open the controlling terminal (if any) for this process. if the
* open fails, future ops that require user input will get an EOF
*/
int
tty_init(void)
{
int ttyfd;
if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
return(0);
(void)fclose(ttyoutf);
}
(void)close(ttyfd);
}
if (iflag) {
paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
return(-1);
}
return(0);
}
/*
* tty_prnt()
* print a message using the specified format to the controlling tty
* if there is no controlling terminal, just return.
*/
void
tty_prnt(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (ttyoutf == NULL) {
va_end(ap);
return;
}
(void)vfprintf(ttyoutf, fmt, ap);
va_end(ap);
(void)fflush(ttyoutf);
}
/*
* tty_read()
* read a string from the controlling terminal if it is open into the
* supplied buffer
* Return:
* 0 if data was read, -1 otherwise.
*/
int
tty_read(char *str, int len)
{
char *pt;
if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
return(-1);
*(str + len) = '\0';
/*
* strip off that trailing newline
*/
if ((pt = strchr(str, '\n')) != NULL)
*pt = '\0';
return(0);
}
/*
* paxwarn()
* write a warning message to stderr. if "set" the exit value of pax
* will be non-zero.
*/
void
paxwarn(int set, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (set)
exit_val = 1;
/*
* when vflag we better ship out an extra \n to get this message on a
* line by itself
*/
if (vflag && vfpart) {
(void)fflush(listf);
(void)fputc('\n', stderr);
vfpart = 0;
}
(void)fprintf(stderr, "%s: ", argv0);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
(void)fputc('\n', stderr);
}
/*
* syswarn()
* write a warning message to stderr. if "set" the exit value of pax
* will be non-zero.
*/
void
syswarn(int set, int errnum, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (set)
exit_val = 1;
/*
* when vflag we better ship out an extra \n to get this message on a
* line by itself
*/
if (vflag && vfpart) {
(void)fflush(listf);
(void)fputc('\n', stderr);
vfpart = 0;
}
(void)fprintf(stderr, "%s: ", argv0);
(void)vfprintf(stderr, fmt, ap);
va_end(ap);
/*
* format and print the errno
*/
if (errnum > 0)
(void)fprintf(stderr, ": %s", strerror(errnum));
(void)fputc('\n', stderr);
}
|
