200 lines
4.9 KiB
C
200 lines
4.9 KiB
C
/* $NetBSD: tty_subs.c,v 1.19 2007/04/23 18:40:22 christos Exp $ */
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/*-
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* Copyright (c) 1992 Keith Muller.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Keith Muller of the University of California, San Diego.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if !defined(lint)
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#if 0
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static char sccsid[] = "@(#)tty_subs.c 8.2 (Berkeley) 4/18/94";
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#else
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__RCSID("$NetBSD: tty_subs.c,v 1.19 2007/04/23 18:40:22 christos Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include "pax.h"
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#include "extern.h"
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#include <stdarg.h>
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/*
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* routines that deal with I/O to and from the user
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*/
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#define DEVTTY "/dev/tty" /* device for interactive i/o */
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static FILE *ttyoutf = NULL; /* output pointing at control tty */
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static FILE *ttyinf = NULL; /* input pointing at control tty */
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/*
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* tty_init()
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* Try to open the controlling terminal (if any) for this process. If the
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* open fails, future ops that require user input will get an EOF.
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*/
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int
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tty_init(void)
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{
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int ttyfd;
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if ((ttyfd = open(DEVTTY, O_RDWR)) >= 0) {
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if ((ttyoutf = fdopen(ttyfd, "w")) != NULL) {
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if ((ttyinf = fdopen(ttyfd, "r")) != NULL)
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return 0;
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(void)fclose(ttyoutf);
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}
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(void)close(ttyfd);
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}
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if (iflag) {
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tty_warn(1, "Fatal error, cannot open %s", DEVTTY);
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return -1;
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}
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return 0;
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}
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/*
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* tty_prnt()
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* print a message using the specified format to the controlling tty
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* if there is no controlling terminal, just return.
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*/
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void
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tty_prnt(const char *fmt, ...)
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{
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va_list ap;
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if (ttyoutf == NULL)
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return;
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va_start(ap, fmt);
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(void)vfprintf(ttyoutf, fmt, ap);
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va_end(ap);
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(void)fflush(ttyoutf);
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}
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/*
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* tty_read()
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* read a string from the controlling terminal if it is open into the
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* supplied buffer
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* Return:
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* 0 if data was read, -1 otherwise.
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*/
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int
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tty_read(char *str, int len)
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{
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char *pt;
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if ((--len <= 0) || (ttyinf == NULL) || (fgets(str,len,ttyinf) == NULL))
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return -1;
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*(str + len) = '\0';
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/*
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* strip off that trailing newline
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*/
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if ((pt = strchr(str, '\n')) != NULL)
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*pt = '\0';
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return 0;
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}
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/*
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* tty_warn()
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* write a warning message to stderr. if "set" the exit value of pax
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* will be non-zero.
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*/
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void
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tty_warn(int set, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (set)
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exit_val = 1;
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/*
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* when vflag we better ship out an extra \n to get this message on a
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* line by itself
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*/
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if ((Vflag || vflag) && vfpart) {
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(void)fputc('\n', stderr);
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vfpart = 0;
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}
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(void)fprintf(stderr, "%s: ", argv0);
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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(void)fputc('\n', stderr);
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}
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/*
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* syswarn()
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* write a warning message to stderr. if "set" the exit value of pax
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* will be non-zero.
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*/
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void
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syswarn(int set, int errnum, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (set)
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exit_val = 1;
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/*
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* when vflag we better ship out an extra \n to get this message on a
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* line by itself
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*/
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if ((Vflag || vflag) && vfpart) {
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(void)fputc('\n', stdout);
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vfpart = 0;
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}
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(void)fprintf(stderr, "%s: ", argv0);
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(void)vfprintf(stderr, fmt, ap);
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va_end(ap);
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/*
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* format and print the errno
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*/
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if (errnum > 0)
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(void)fprintf(stderr, " (%s)", strerror(errnum));
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(void)fputc('\n', stderr);
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}
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