247 lines
5.5 KiB
C
247 lines
5.5 KiB
C
/*-
|
|
* 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
|
|
* are met:
|
|
* 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
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $Id: tty_subs.c,v 1.3 1995/10/23 21:23:27 ache Exp $
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char const sccsid[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/param.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "pax.h"
|
|
#include "extern.h"
|
|
#if __STDC__
|
|
#include <stdarg.h>
|
|
#else
|
|
#include <varargs.h>
|
|
#endif
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
/*
|
|
* tty_init()
|
|
* 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 __STDC__
|
|
int
|
|
tty_init(void)
|
|
#else
|
|
int
|
|
tty_init()
|
|
#endif
|
|
{
|
|
int ttyfd;
|
|
|
|
if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
|
|
if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
|
|
if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
|
|
return(0);
|
|
(void)fclose(ttyoutf);
|
|
}
|
|
(void)close(ttyfd);
|
|
}
|
|
|
|
if (iflag) {
|
|
warn(1, "Fatal error, cannot open %s", DEVTTY);
|
|
return(-1);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* tty_prnt()
|
|
* print a message using the specified format to the controlling tty
|
|
* if there is no controlling terminal, just return.
|
|
*/
|
|
|
|
#if __STDC__
|
|
void
|
|
tty_prnt(char *fmt, ...)
|
|
#else
|
|
void
|
|
tty_prnt(fmt, va_alist)
|
|
char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
# if __STDC__
|
|
va_start(ap, fmt);
|
|
# else
|
|
va_start(ap);
|
|
# endif
|
|
if (ttyoutf == NULL)
|
|
return;
|
|
(void)vfprintf(ttyoutf, fmt, ap);
|
|
va_end(ap);
|
|
(void)fflush(ttyoutf);
|
|
}
|
|
|
|
/*
|
|
* tty_read()
|
|
* read a string from the controlling terminal if it is open into the
|
|
* supplied buffer
|
|
* Return:
|
|
* 0 if data was read, -1 otherwise.
|
|
*/
|
|
|
|
#if __STDC__
|
|
int
|
|
tty_read(char *str, int len)
|
|
#else
|
|
int
|
|
tty_read(str, len)
|
|
char *str;
|
|
int len;
|
|
#endif
|
|
{
|
|
register char *pt;
|
|
|
|
if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
|
|
return(-1);
|
|
*(str + len) = '\0';
|
|
|
|
/*
|
|
* strip off that trailing newline
|
|
*/
|
|
if ((pt = strchr(str, '\n')) != NULL)
|
|
*pt = '\0';
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* warn()
|
|
* write a warning message to stderr. if "set" the exit value of pax
|
|
* will be non-zero.
|
|
*/
|
|
|
|
#if __STDC__
|
|
void
|
|
warn(int set, char *fmt, ...)
|
|
#else
|
|
void
|
|
warn(set, fmt, va_alist)
|
|
int set;
|
|
char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
# if __STDC__
|
|
va_start(ap, fmt);
|
|
# else
|
|
va_start(ap);
|
|
# endif
|
|
if (set)
|
|
exit_val = 1;
|
|
/*
|
|
* when vflag we better ship out an extra \n to get this message on a
|
|
* line by itself
|
|
*/
|
|
if (vflag && vfpart) {
|
|
(void)fputc('\n', stderr);
|
|
vfpart = 0;
|
|
}
|
|
(void)fprintf(stderr, "%s: ", argv0);
|
|
(void)vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
(void)fputc('\n', stderr);
|
|
}
|
|
|
|
/*
|
|
* syswarn()
|
|
* write a warning message to stderr. if "set" the exit value of pax
|
|
* will be non-zero.
|
|
*/
|
|
|
|
#if __STDC__
|
|
void
|
|
syswarn(int set, int errnum, char *fmt, ...)
|
|
#else
|
|
void
|
|
syswarn(set, errnum, fmt, va_alist)
|
|
int set;
|
|
int errnum;
|
|
char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
# if __STDC__
|
|
va_start(ap, fmt);
|
|
# else
|
|
va_start(ap);
|
|
# endif
|
|
if (set)
|
|
exit_val = 1;
|
|
/*
|
|
* when vflag we better ship out an extra \n to get this message on a
|
|
* line by itself
|
|
*/
|
|
if (vflag && vfpart) {
|
|
(void)fputc('\n', stderr);
|
|
vfpart = 0;
|
|
}
|
|
(void)fprintf(stderr, "%s: ", argv0);
|
|
(void)vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
|
|
/*
|
|
* format and print the errno
|
|
*/
|
|
if (errnum > 0)
|
|
(void)fprintf(stderr, " <%s>", sys_errlist[errnum]);
|
|
(void)fputc('\n', stderr);
|
|
}
|