#include "config.h"
#include <sys/types.h>
#include <sys/param.h>
#ifdef HAVE_SYS_BSDTYPES_H
# include <sys/bsdtypes.h>
#endif
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#include <sys/time.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#ifdef HAVE_STRING_H
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
# include <memory.h>
# endif
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <pwd.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
#ifdef HAVE_TERMIOS_H
# include <termios.h>
#else
# ifdef HAVE_TERMIO_H
# include <termio.h>
# else
# include <sgtty.h>
# include <sys/ioctl.h>
# endif
#endif
#include "sudo.h"
#ifndef lint
static const char rcsid[] = "$Sudo: tgetpass.c,v 1.103 2001/12/17 23:56:47 millert Exp $";
#endif
#ifndef TCSASOFT
# define TCSASOFT 0
#endif
#ifndef ECHONL
# define ECHONL 0
#endif
#ifndef _POSIX_VDISABLE
# ifdef VDISABLE
# define _POSIX_VDISABLE VDISABLE
# else
# define _POSIX_VDISABLE 0
# endif
#endif
#undef TERM
#undef tflags
#ifdef HAVE_TERMIOS_H
# define TERM termios
# define tflags c_lflag
# define term_getattr(f, t) tcgetattr(f, t)
# define term_setattr(f, t) tcsetattr(f, TCSAFLUSH|TCSASOFT, t)
#else
# ifdef HAVE_TERMIO_H
# define TERM termio
# define tflags c_lflag
# define term_getattr(f, t) ioctl(f, TCGETA, t)
# define term_setattr(f, t) ioctl(f, TCSETAF, t)
# else
# define TERM sgttyb
# define tflags sg_flags
# define term_getattr(f, t) ioctl(f, TIOCGETP, t)
# define term_setattr(f, t) ioctl(f, TIOCSETP, t)
# endif
#endif
static volatile sig_atomic_t signo;
static char *tgetline __P((int, char *, size_t, int));
static void handler __P((int));
char *
tgetpass(prompt, timeout, flags)
const char *prompt;
int timeout;
int flags;
{
sigaction_t sa, saveint, savehup, savequit, saveterm;
sigaction_t savetstp, savettin, savettou;
static char buf[SUDO_PASS_MAX + 1];
int input, output, save_errno;
struct TERM term, oterm;
char *pass;
restart:
if ((flags & TGP_STDIN) ||
(input = output = open(_PATH_TTY, O_RDWR|O_NOCTTY)) == -1) {
input = STDIN_FILENO;
output = STDERR_FILENO;
}
if (prompt)
(void) write(output, prompt, strlen(prompt));
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = handler;
(void) sigaction(SIGINT, &sa, &saveint);
(void) sigaction(SIGHUP, &sa, &savehup);
(void) sigaction(SIGQUIT, &sa, &savequit);
(void) sigaction(SIGTERM, &sa, &saveterm);
(void) sigaction(SIGTSTP, &sa, &savetstp);
(void) sigaction(SIGTTIN, &sa, &savettin);
(void) sigaction(SIGTTOU, &sa, &savettou);
if (term_getattr(input, &oterm) == 0) {
(void) memcpy(&term, &oterm, sizeof(term));
if (!(flags & TGP_ECHO))
term.tflags &= ~(ECHO | ECHONL);
#ifdef VSTATUS
term.c_cc[VSTATUS] = _POSIX_VDISABLE;
#endif
(void) term_setattr(input, &term);
} else {
memset(&term, 0, sizeof(term));
memset(&oterm, 0, sizeof(oterm));
}
pass = tgetline(input, buf, sizeof(buf), timeout);
save_errno = errno;
if (!(term.tflags & ECHO))
(void) write(output, "\n", 1);
if (memcmp(&term, &oterm, sizeof(term)) != 0)
(void) term_setattr(input, &oterm);
(void) sigaction(SIGINT, &saveint, NULL);
(void) sigaction(SIGHUP, &savehup, NULL);
(void) sigaction(SIGQUIT, &savequit, NULL);
(void) sigaction(SIGTERM, &saveterm, NULL);
(void) sigaction(SIGTSTP, &savetstp, NULL);
(void) sigaction(SIGTTIN, &savettin, NULL);
(void) sigaction(SIGTTOU, &savettou, NULL);
if (input != STDIN_FILENO)
(void) close(input);
if (signo) {
kill(getpid(), signo);
switch (signo) {
case SIGTSTP:
case SIGTTIN:
case SIGTTOU:
signo = 0;
goto restart;
}
}
errno = save_errno;
return(pass);
}
static char *
tgetline(fd, buf, bufsiz, timeout)
int fd;
char *buf;
size_t bufsiz;
int timeout;
{
fd_set *readfds = NULL;
struct timeval tv;
size_t left;
char *cp;
char c;
int n;
if (bufsiz == 0) {
errno = EINVAL;
return(NULL);
}
cp = buf;
left = bufsiz;
if (timeout > 0) {
n = howmany(fd + 1, NFDBITS) * sizeof(fd_mask);
readfds = (fd_set *) emalloc(n);
(void) memset((VOID *)readfds, 0, n);
tv.tv_sec = timeout;
tv.tv_usec = 0;
while (--left) {
FD_SET(fd, readfds);
while ((n = select(fd + 1, readfds, 0, 0, &tv)) == -1 &&
errno == EAGAIN)
;
if (n <= 0) {
free(readfds);
return(NULL);
}
n = read(fd, &c, 1);
if (n != 1 || c == '\n' || c == '\r')
break;
*cp++ = c;
}
free(readfds);
} else {
n = -1;
while (--left && (n = read(fd, &c, 1)) == 1 && c != '\n' && c != '\r')
*cp++ = c;
}
*cp = '\0';
return(n == -1 ? NULL : buf);
}
static void handler(s)
int s;
{
signo = s;
}