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/*
* Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*/
#include "login_locl.h"
RCSID("$Id: read_string.c,v 1.4 2000/06/21 02:09:36 assar Exp $");
static sig_atomic_t intr_flag;
static void
intr(int sig)
{
intr_flag++;
}
int
read_string(const char *prompt, char *buf, size_t len, int echo)
{
struct sigaction sigs[47];
struct sigaction sa;
FILE *tty;
int ret = 0;
int of = 0;
int i;
int c;
char *p;
struct termios t_new, t_old;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = intr;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
for(i = 0; i < sizeof(sigs) / sizeof(sigs[0]); i++)
if (i != SIGALRM) sigaction(i, &sa, &sigs[i]);
if((tty = fopen("/dev/tty", "r")) == NULL)
tty = stdin;
fprintf(stderr, "%s", prompt);
fflush(stderr);
if(echo == 0){
tcgetattr(fileno(tty), &t_old);
memcpy(&t_new, &t_old, sizeof(t_new));
t_new.c_lflag &= ~ECHO;
tcsetattr(fileno(tty), TCSANOW, &t_new);
}
intr_flag = 0;
p = buf;
while(intr_flag == 0){
c = getc(tty);
if(c == EOF){
if(!ferror(tty))
ret = 1;
break;
}
if(c == '\n')
break;
if(of == 0)
*p++ = c;
of = (p == buf + len);
}
if(of)
p--;
*p = 0;
if(echo == 0){
printf("\n");
tcsetattr(fileno(tty), TCSANOW, &t_old);
}
if(tty != stdin)
fclose(tty);
for(i = 0; i < sizeof(sigs) / sizeof(sigs[0]); i++)
if (i != SIGALRM) sigaction(i, &sigs[i], NULL);
if(ret)
return -3;
if(intr_flag)
return -2;
if(of)
return -1;
return 0;
}
#if 0
int main()
{
char s[128];
int ret;
ret = read_string("foo: ", s, sizeof(s), 0);
printf("%d ->%s<-\n", ret, s);
}
#endif
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