2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1992 Keith Muller.
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Keith Muller of the University of California, San Diego.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static char sccsid[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/types.h>
55 * routines that deal with I/O to and from the user
58 #define DEVTTY "/dev/tty" /* device for interactive i/o */
59 static FILE *ttyoutf = NULL; /* output pointing at control tty */
60 static FILE *ttyinf = NULL; /* input pointing at control tty */
64 * try to open the controlling terminal (if any) for this process. if the
65 * open fails, future ops that require user input will get an EOF
73 if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
74 if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
75 if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
77 (void)fclose(ttyoutf);
83 paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
91 * print a message using the specified format to the controlling tty
92 * if there is no controlling terminal, just return.
96 tty_prnt(const char *fmt, ...)
102 (void)vfprintf(ttyoutf, fmt, ap);
104 (void)fflush(ttyoutf);
109 * read a string from the controlling terminal if it is open into the
112 * 0 if data was read, -1 otherwise.
116 tty_read(char *str, int len)
120 if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
125 * strip off that trailing newline
127 if ((pt = strchr(str, '\n')) != NULL)
134 * write a warning message to stderr. if "set" the exit value of pax
139 paxwarn(int set, const char *fmt, ...)
146 * when vflag we better ship out an extra \n to get this message on a
149 if (vflag && vfpart) {
151 (void)fputc('\n', stderr);
154 (void)fprintf(stderr, "%s: ", argv0);
155 (void)vfprintf(stderr, fmt, ap);
157 (void)fputc('\n', stderr);
162 * write a warning message to stderr. if "set" the exit value of pax
167 syswarn(int set, int errnum, const char *fmt, ...)
174 * when vflag we better ship out an extra \n to get this message on a
177 if (vflag && vfpart) {
179 (void)fputc('\n', stderr);
182 (void)fprintf(stderr, "%s: ", argv0);
183 (void)vfprintf(stderr, fmt, ap);
187 * format and print the errno
190 (void)fprintf(stderr, " <%s>", strerror(errnum));
191 (void)fputc('\n', stderr);