GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/cu/input.c Lines: 0 26 0.0 %
Date: 2017-11-07 Branches: 0 16 0.0 %

Line Branch Exec Source
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/* $OpenBSD: input.c,v 1.2 2012/07/10 10:28:05 nicm Exp $ */
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/*
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 * Copyright (c) 2012 Nicholas Marriott <nicm@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <ctype.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "cu.h"
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/*
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 * Prompt and read a line of user input from stdin. We want to use the termios
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 * we were started with so restore and stick in a signal handler for ^C.
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 */
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volatile sig_atomic_t input_stop;
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void	input_signal(int);
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void
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input_signal(int sig)
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{
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	input_stop = 1;
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}
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const char *
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get_input(const char *prompt)
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{
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	static char		s[BUFSIZ];
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	struct sigaction	act, oact;
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	char			c, *cp, *out = NULL;
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	ssize_t			n;
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	memset(&act, 0, sizeof(act));
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	sigemptyset(&act.sa_mask);
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	act.sa_flags = 0;
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	act.sa_handler = input_signal;
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	if (sigaction(SIGINT, &act, &oact) != 0)
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		cu_err(1, "sigaction");
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	input_stop = 0;
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	restore_termios();
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	printf("%s ", prompt);
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	fflush(stdout);
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	cp = s;
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	while (cp != s + sizeof(s) - 1) {
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		n = read(STDIN_FILENO, &c, 1);
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		if (n == -1 && errno != EINTR)
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			cu_err(1, "read");
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		if (n != 1 || input_stop)
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			break;
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		if (c == '\n') {
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			out = s;
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			break;
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		}
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		if (!iscntrl((u_char)c))
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			*cp++ = c;
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	}
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	*cp = '\0';
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	set_termios();
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	sigaction(SIGINT, &oact, NULL);
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	return (out);
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}