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1 /* $OpenBSD: tty_subs.c,v 1.12 2003/06/02 23:32:09 millert Exp $ */
2 /* $NetBSD: tty_subs.c,v 1.5 1995/03/21 09:07:52 cgd Exp $ */
5 * Copyright (c) 1992 Keith Muller.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
9 * This code is derived from software contributed to Berkeley by
10 * Keith Muller of the University of California, San Diego.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/cdefs.h>
40 static const char sccsid
[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94";
42 __used
static const char rcsid
[] = "$OpenBSD: tty_subs.c,v 1.12 2003/06/02 23:32:09 millert Exp $";
46 #include <sys/types.h>
49 #include <sys/param.h>
61 * routines that deal with I/O to and from the user
64 #define DEVTTY "/dev/tty" /* device for interactive i/o */
65 static FILE *ttyoutf
= NULL
; /* output pointing at control tty */
66 static FILE *ttyinf
= NULL
; /* input pointing at control tty */
70 * try to open the controlling terminal (if any) for this process. if the
71 * open fails, future ops that require user input will get an EOF
79 if ((ttyfd
= open(DEVTTY
, O_RDWR
)) >= 0) {
80 if ((ttyoutf
= fdopen(ttyfd
, "w")) != NULL
) {
81 if ((ttyinf
= fdopen(ttyfd
, "r")) != NULL
)
83 (void)fclose(ttyoutf
);
89 paxwarn(1, "Fatal error, cannot open %s", DEVTTY
);
97 * print a message using the specified format to the controlling tty
98 * if there is no controlling terminal, just return.
102 tty_prnt(const char *fmt
, ...)
108 (void)vfprintf(ttyoutf
, fmt
, ap
);
110 (void)fflush(ttyoutf
);
115 * read a string from the controlling terminal if it is open into the
118 * 0 if data was read, -1 otherwise.
122 tty_read(char *str
, int len
)
126 if ((--len
<= 0) || (ttyinf
== NULL
) || (fgets(str
,len
,ttyinf
) == NULL
))
131 * strip off that trailing newline
133 if ((pt
= strchr(str
, '\n')) != NULL
)
140 * write a warning message to stderr. if "set" the exit value of pax
145 paxwarn(int set
, const char *fmt
, ...)
150 if (set
&& (pax_invalid_action
==0))
153 * when vflag we better ship out an extra \n to get this message on a
156 if (vflag
&& vfpart
) {
158 (void)fputc('\n', stderr
);
161 (void)fprintf(stderr
, "%s: ", argv0
);
162 (void)vfprintf(stderr
, fmt
, ap
);
164 (void)fputc('\n', stderr
);
169 * write a warning message to stderr. if "set" the exit value of pax
174 syswarn(int set
, int errnum
, const char *fmt
, ...)
182 * when vflag we better ship out an extra \n to get this message on a
185 if (vflag
&& vfpart
) {
187 (void)fputc('\n', stderr
);
190 (void)fprintf(stderr
, "%s: ", argv0
);
191 (void)vfprintf(stderr
, fmt
, ap
);
195 * format and print the errno
198 (void)fprintf(stderr
, " <%s>", strerror(errnum
));
199 (void)fputc('\n', stderr
);