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/*
* $Id: getpassword.c,v 1.8 2003/11/20 13:56:41 bryan Exp $
*
* Copyright conserver.com, 2000
*
* Maintainer/Enhancer: Bryan Stansell (bryan@conserver.com)
*
* Copyright GNAC, Inc., 1998
*/
#include <compat.h>
#include <pwd.h>
#include <cutil.h>
#include <version.h>
/* the next two routines assure that the users tty is in the
* correct mode for us to do our thing
*/
static int screwy = 0;
static struct termios o_tios;
/* this holds the password given to us by the user */
static STRING *pass = (STRING *)0;
/*
* show characters that are already tty processed,
* and read characters before cononical processing
* we really use cbreak at PUCC because we need even parity...
*/
static void
#if PROTOTYPES
C2Raw(int fd)
#else
C2Raw(fd)
int fd;
#endif
{
struct termios n_tios;
if (!isatty(fd) || 0 != screwy)
return;
if (0 != tcgetattr(fd, &o_tios)) {
Error("tcgetattr(%d): %s", fd, strerror(errno));
Bye(EX_UNAVAILABLE);
}
n_tios = o_tios;
n_tios.c_iflag &= ~(IUCLC | IXON);
n_tios.c_oflag &= ~OPOST;
n_tios.c_lflag &= ~(ISIG | ECHO | IEXTEN);
n_tios.c_cc[VMIN] = 1;
n_tios.c_cc[VTIME] = 0;
if (0 != tcsetattr(fd, TCSANOW, &n_tios)) {
Error("tcsetattr(%d, TCSANOW): %s", fd, strerror(errno));
Bye(EX_UNAVAILABLE);
}
screwy = 1;
}
/*
* put the tty back as it was, however that was
*/
static void
#if PROTOTYPES
C2Normal(int fd)
#else
C2Normal(fd)
int fd;
#endif
{
if (!screwy)
return;
tcsetattr(fd, TCSANOW, &o_tios);
screwy = 0;
}
char *
#if PROTOTYPES
GetPassword(char *prompt)
#else
GetPassword(prompt)
char *prompt;
#endif
{
int fd;
int nc;
char buf[BUFSIZ];
int done = 0;
if (prompt == (char *)0)
prompt = "";
if ((pass = AllocString()) == (STRING *)0)
OutOfMem();
BuildString((char *)0, pass);
if ((fd = open("/dev/tty", O_RDWR)) == -1) {
Error("could not open `/dev/tty': %s", strerror(errno));
return (char *)0;
}
C2Raw(fd);
write(fd, prompt, strlen(prompt));
while (!done) {
int i;
if ((nc = read(0, buf, sizeof(buf))) == 0)
break;
for (i = 0; i < nc; ++i) {
if (buf[i] == 0x0d || buf[i] == 0x0a) {
/* CR, NL */
done = 1;
break;
} else
BuildStringChar(buf[i], pass);
}
}
C2Normal(fd);
/*
{
static STRING *c = (STRING *) 0;
if ((c = AllocString()) == (STRING *) 0)
OutOfMem();
write(fd, "\n'", 2);
if (pass->used) {
FmtCtlStr(pass->string, pass->used - 1, c);
write(fd, c->string, c->used - 1);
}
write(fd, "'\n", 2);
}
*/
write(fd, "\n", 1);
close(fd);
/* this way a (char*)0 is only returned on error */
if (pass->string == (char *)0)
return "";
else
return pass->string;
}
void
#if PROTOTYPES
ClearPassword(void)
#else
ClearPassword()
#endif
{
if (pass == (STRING *)0 || pass->allocated == 0)
return;
#if HAVE_MEMSET
memset((void *)(pass->string), '\000', pass->allocated);
#else
bzero((char *)(pass->string), pass->allocated);
#endif
BuildString((char *)0, pass);
}
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