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