Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[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 $
39 * $DragonFly: src/bin/pax/tty_subs.c,v 1.2 2003/06/17 04:22:50 dillon 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"
51#ifdef __STDC__
52#include <stdarg.h>
53#else
54#include <varargs.h>
55#endif
56
57/*
58 * routines that deal with I/O to and from the user
59 */
60
61#define DEVTTY "/dev/tty" /* device for interactive i/o */
62static FILE *ttyoutf = NULL; /* output pointing at control tty */
63static FILE *ttyinf = NULL; /* input pointing at control tty */
64
65/*
66 * tty_init()
67 * try to open the controlling terminal (if any) for this process. if the
68 * open fails, future ops that require user input will get an EOF
69 */
70
71#ifdef __STDC__
72int
73tty_init(void)
74#else
75int
76tty_init()
77#endif
78{
79 int ttyfd;
80
81 if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
82 if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
83 if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
84 return(0);
85 (void)fclose(ttyoutf);
86 }
87 (void)close(ttyfd);
88 }
89
90 if (iflag) {
91 paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
92 return(-1);
93 }
94 return(0);
95}
96
97/*
98 * tty_prnt()
99 * print a message using the specified format to the controlling tty
100 * if there is no controlling terminal, just return.
101 */
102
103#ifdef __STDC__
104void
105tty_prnt(const char *fmt, ...)
106#else
107void
108tty_prnt(fmt, va_alist)
109 const char *fmt;
110 va_dcl
111#endif
112{
113 va_list ap;
114# ifdef __STDC__
115 va_start(ap, fmt);
116# else
117 va_start(ap);
118# endif
119 if (ttyoutf == NULL)
120 return;
121 (void)vfprintf(ttyoutf, fmt, ap);
122 va_end(ap);
123 (void)fflush(ttyoutf);
124}
125
126/*
127 * tty_read()
128 * read a string from the controlling terminal if it is open into the
129 * supplied buffer
130 * Return:
131 * 0 if data was read, -1 otherwise.
132 */
133
134#ifdef __STDC__
135int
136tty_read(char *str, int len)
137#else
138int
139tty_read(str, len)
140 char *str;
141 int len;
142#endif
143{
144 register char *pt;
145
146 if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
147 return(-1);
148 *(str + len) = '\0';
149
150 /*
151 * strip off that trailing newline
152 */
153 if ((pt = strchr(str, '\n')) != NULL)
154 *pt = '\0';
155 return(0);
156}
157
158/*
159 * paxwarn()
160 * write a warning message to stderr. if "set" the exit value of pax
161 * will be non-zero.
162 */
163
164#ifdef __STDC__
165void
166paxwarn(int set, const char *fmt, ...)
167#else
168void
169paxwarn(set, fmt, va_alist)
170 int set;
171 const char *fmt;
172 va_dcl
173#endif
174{
175 va_list ap;
176# ifdef __STDC__
177 va_start(ap, fmt);
178# else
179 va_start(ap);
180# endif
181 if (set)
182 exit_val = 1;
183 /*
184 * when vflag we better ship out an extra \n to get this message on a
185 * line by itself
186 */
187 if (vflag && vfpart) {
188 (void)fflush(listf);
189 (void)fputc('\n', stderr);
190 vfpart = 0;
191 }
192 (void)fprintf(stderr, "%s: ", argv0);
193 (void)vfprintf(stderr, fmt, ap);
194 va_end(ap);
195 (void)fputc('\n', stderr);
196}
197
198/*
199 * syswarn()
200 * write a warning message to stderr. if "set" the exit value of pax
201 * will be non-zero.
202 */
203
204#ifdef __STDC__
205void
206syswarn(int set, int errnum, const char *fmt, ...)
207#else
208void
209syswarn(set, errnum, fmt, va_alist)
210 int set;
211 int errnum;
212 const char *fmt;
213 va_dcl
214#endif
215{
216 va_list ap;
217# ifdef __STDC__
218 va_start(ap, fmt);
219# else
220 va_start(ap);
221# endif
222 if (set)
223 exit_val = 1;
224 /*
225 * when vflag we better ship out an extra \n to get this message on a
226 * line by itself
227 */
228 if (vflag && vfpart) {
229 (void)fflush(listf);
230 (void)fputc('\n', stderr);
231 vfpart = 0;
232 }
233 (void)fprintf(stderr, "%s: ", argv0);
234 (void)vfprintf(stderr, fmt, ap);
235 va_end(ap);
236
237 /*
238 * format and print the errno
239 */
240 if (errnum > 0)
241 (void)fprintf(stderr, " <%s>", strerror(errnum));
242 (void)fputc('\n', stderr);
243}