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 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char sccsid[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/types.h>
54 * routines that deal with I/O to and from the user
57 #define DEVTTY "/dev/tty" /* device for interactive i/o */
58 static FILE *ttyoutf = NULL; /* output pointing at control tty */
59 static FILE *ttyinf = NULL; /* input pointing at control tty */
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
72 if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
73 if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
74 if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
76 (void)fclose(ttyoutf);
82 paxwarn(1, "Fatal error, cannot open %s", DEVTTY);
90 * print a message using the specified format to the controlling tty
91 * if there is no controlling terminal, just return.
95 tty_prnt(const char *fmt, ...)
101 (void)vfprintf(ttyoutf, fmt, ap);
103 (void)fflush(ttyoutf);
108 * read a string from the controlling terminal if it is open into the
111 * 0 if data was read, -1 otherwise.
115 tty_read(char *str, int len)
119 if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
124 * strip off that trailing newline
126 if ((pt = strchr(str, '\n')) != NULL)
133 * write a warning message to stderr. if "set" the exit value of pax
138 paxwarn(int set, const char *fmt, ...)
145 * when vflag we better ship out an extra \n to get this message on a
148 if (vflag && vfpart) {
150 (void)fputc('\n', stderr);
153 (void)fprintf(stderr, "%s: ", argv0);
154 (void)vfprintf(stderr, fmt, ap);
156 (void)fputc('\n', stderr);
161 * write a warning message to stderr. if "set" the exit value of pax
166 syswarn(int set, int errnum, const char *fmt, ...)
173 * when vflag we better ship out an extra \n to get this message on a
176 if (vflag && vfpart) {
178 (void)fputc('\n', stderr);
181 (void)fprintf(stderr, "%s: ", argv0);
182 (void)vfprintf(stderr, fmt, ap);
186 * format and print the errno
189 (void)fprintf(stderr, " <%s>", strerror(errnum));
190 (void)fputc('\n', stderr);