2 * Copyright (c) 1992 Keith Muller.
3 * Copyright (c) 1992, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * Keith Muller of the University of California, San Diego.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
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 1.3 2003/09/28 14:39:14 hmp Exp $
42 #include <sys/types.h>
58 * routines that deal with I/O to and from the user
61 #define DEVTTY "/dev/tty" /* device for interactive i/o */
62 static FILE *ttyoutf = NULL; /* output pointing at control tty */
63 static FILE *ttyinf = NULL; /* input pointing at control tty */
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
76 if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
77 if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
78 if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
80 (void)fclose(ttyoutf);
86 paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
94 * print a message using the specified format to the controlling tty
95 * if there is no controlling terminal, just return.
99 tty_prnt(const char *fmt, ...)
109 (void)vfprintf(ttyoutf, fmt, ap);
111 (void)fflush(ttyoutf);
116 * read a string from the controlling terminal if it is open into the
119 * 0 if data was read, -1 otherwise.
123 tty_read(char *str, int len)
127 if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
132 * strip off that trailing newline
134 if ((pt = strchr(str, '\n')) != NULL)
141 * write a warning message to stderr. if "set" the exit value of pax
146 paxwarn(int set, const char *fmt, ...)
157 * when vflag we better ship out an extra \n to get this message on a
160 if (vflag && vfpart) {
162 (void)fputc('\n', stderr);
165 (void)fprintf(stderr, "%s: ", argv0);
166 (void)vfprintf(stderr, fmt, ap);
168 (void)fputc('\n', stderr);
173 * write a warning message to stderr. if "set" the exit value of pax
178 syswarn(int set, int errnum, const char *fmt, ...)
189 * when vflag we better ship out an extra \n to get this message on a
192 if (vflag && vfpart) {
194 (void)fputc('\n', stderr);
197 (void)fprintf(stderr, "%s: ", argv0);
198 (void)vfprintf(stderr, fmt, ap);
202 * format and print the errno
205 (void)fprintf(stderr, " <%s>", strerror(errnum));
206 (void)fputc('\n', stderr);