Remove not needed void casts.
[dragonfly.git] / bin / pax / tty_subs.c
CommitLineData
984263bc
MD
1/*-
2 * Copyright (c) 1992 Keith Muller.
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Keith Muller of the University of California, San Diego.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
1de703da
MD
36 *
37 * @(#)tty_subs.c 8.2 (Berkeley) 4/18/94
38 * $FreeBSD: src/bin/pax/tty_subs.c,v 1.11.2.1 2001/08/01 05:03:12 obrien Exp $
57fed2af 39 * $DragonFly: src/bin/pax/tty_subs.c,v 1.6 2004/11/07 20:54:51 eirikn Exp $
984263bc
MD
40 */
41
984263bc
MD
42#include <sys/types.h>
43#include <sys/stat.h>
44#include <fcntl.h>
45#include <stdio.h>
46#include <unistd.h>
47#include <stdlib.h>
48#include <string.h>
49#include "pax.h"
50#include "extern.h"
984263bc 51#include <stdarg.h>
984263bc
MD
52
53/*
54 * routines that deal with I/O to and from the user
55 */
56
57#define DEVTTY "/dev/tty" /* device for interactive i/o */
58static FILE *ttyoutf = NULL; /* output pointing at control tty */
59static FILE *ttyinf = NULL; /* input pointing at control tty */
60
61/*
62 * tty_init()
63 * try to open the controlling terminal (if any) for this process. if the
64 * open fails, future ops that require user input will get an EOF
65 */
66
984263bc
MD
67int
68tty_init(void)
984263bc
MD
69{
70 int ttyfd;
71
72 if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
73 if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
74 if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
75 return(0);
57fed2af 76 fclose(ttyoutf);
984263bc 77 }
57fed2af 78 close(ttyfd);
984263bc
MD
79 }
80
81 if (iflag) {
82 paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
83 return(-1);
84 }
85 return(0);
86}
87
88/*
89 * tty_prnt()
90 * print a message using the specified format to the controlling tty
91 * if there is no controlling terminal, just return.
92 */
93
984263bc
MD
94void
95tty_prnt(const char *fmt, ...)
984263bc
MD
96{
97 va_list ap;
984263bc 98 va_start(ap, fmt);
984263bc
MD
99 if (ttyoutf == NULL)
100 return;
57fed2af 101 vfprintf(ttyoutf, fmt, ap);
984263bc 102 va_end(ap);
57fed2af 103 fflush(ttyoutf);
984263bc
MD
104}
105
106/*
107 * tty_read()
108 * read a string from the controlling terminal if it is open into the
109 * supplied buffer
110 * Return:
111 * 0 if data was read, -1 otherwise.
112 */
113
984263bc
MD
114int
115tty_read(char *str, int len)
984263bc 116{
86a586bb 117 char *pt;
984263bc
MD
118
119 if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
120 return(-1);
121 *(str + len) = '\0';
122
123 /*
124 * strip off that trailing newline
125 */
126 if ((pt = strchr(str, '\n')) != NULL)
127 *pt = '\0';
128 return(0);
129}
130
131/*
132 * paxwarn()
133 * write a warning message to stderr. if "set" the exit value of pax
134 * will be non-zero.
135 */
136
984263bc
MD
137void
138paxwarn(int set, const char *fmt, ...)
984263bc
MD
139{
140 va_list ap;
984263bc 141 va_start(ap, fmt);
984263bc
MD
142 if (set)
143 exit_val = 1;
144 /*
145 * when vflag we better ship out an extra \n to get this message on a
146 * line by itself
147 */
148 if (vflag && vfpart) {
57fed2af
EN
149 fflush(listf);
150 fputc('\n', stderr);
984263bc
MD
151 vfpart = 0;
152 }
57fed2af
EN
153 fprintf(stderr, "%s: ", argv0);
154 vfprintf(stderr, fmt, ap);
984263bc 155 va_end(ap);
57fed2af 156 fputc('\n', stderr);
984263bc
MD
157}
158
159/*
160 * syswarn()
161 * write a warning message to stderr. if "set" the exit value of pax
162 * will be non-zero.
163 */
164
984263bc
MD
165void
166syswarn(int set, int errnum, const char *fmt, ...)
984263bc
MD
167{
168 va_list ap;
984263bc 169 va_start(ap, fmt);
984263bc
MD
170 if (set)
171 exit_val = 1;
172 /*
173 * when vflag we better ship out an extra \n to get this message on a
174 * line by itself
175 */
176 if (vflag && vfpart) {
57fed2af
EN
177 fflush(listf);
178 fputc('\n', stderr);
984263bc
MD
179 vfpart = 0;
180 }
57fed2af
EN
181 fprintf(stderr, "%s: ", argv0);
182 vfprintf(stderr, fmt, ap);
984263bc
MD
183 va_end(ap);
184
185 /*
186 * format and print the errno
187 */
188 if (errnum > 0)
57fed2af
EN
189 fprintf(stderr, " <%s>", strerror(errnum));
190 fputc('\n', stderr);
984263bc 191}