* Copyright (c) 1992 Keith Muller.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
static char sccsid
[] = "@(#)tty_subs.c 8.1 (Berkeley) 5/31/93";
* routines that deal with I/O to and from the user
#define DEVTTY "/dev/tty" /* device for interactive i/o */
static FILE *ttyoutf
= NULL
; /* output pointing at control tty */
static FILE *ttyinf
= NULL
; /* input pointing at control tty */
* try to open the controlling termina (if any) for this process. if the
* open fails, future ops that require user input will get an EOF
if ((ttyfd
= open(DEVTTY
, O_RDWR
)) >= 0) {
if ((ttyoutf
= fdopen(ttyfd
, "w")) != NULL
) {
if ((ttyinf
= fdopen(ttyfd
, "r")) != NULL
)
warn(1, "Fatal error, cannot open %s", DEVTTY
);
* print a message using the specified format to the controlling tty
* if there is no controlling terminal, just return.
(void)vfprintf(ttyoutf
, fmt
, ap
);
* read a string from the controlling terminal if it is open into the
* 0 if data was read, -1 otherwise.
tty_read(char *str
, int len
)
if ((--len
<= 0) || (ttyinf
== NULL
) || (fgets(str
,len
,ttyinf
) == NULL
))
* strip off that trailing newline
if ((pt
= strchr(str
, '\n')) != NULL
)
* write a warning message to stderr. if "set" the exit value of pax
warn(int set
, char *fmt
, ...)
* when vflag we better ship out an extra \n to get this message on a
(void)fputc('\n', stderr
);
(void)fputs("pax: ", stderr
);
(void)vfprintf(stderr
, fmt
, ap
);
(void)fputc('\n', stderr
);
* write a warning message to stderr. if "set" the exit value of pax
syswarn(int set
, int errnum
, char *fmt
, ...)
syswarn(set
, errnum
, fmt
, va_alist
)
* when vflag we better ship out an extra \n to get this message on a
(void)fputc('\n', stderr
);
(void)fputs("pax: ", stderr
);
(void)vfprintf(stderr
, fmt
, ap
);
* format and print the errno
(void)fprintf(stderr
, " <%s>", sys_errlist
[errnum
]);
(void)fputc('\n', stderr
);