source4/lib/getsmbpass.c

   1 /* Copyright (C) 1992-1998 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 /* Modified to use with samba by Jeremy Allison, 8th July 1995. */
  20
  21 #include "includes.h"
  22 #include "system/terminal.h"
  23 #include "system/wait.h"
  24
  25 #ifdef REPLACE_GETPASS
  26
  27 #ifdef SYSV_TERMIO
  28
  29 /* SYSTEM V TERMIO HANDLING */
  30
  31 static struct termio t;
  32
  33 #define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
  34 #define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
  35 #define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
  36
  37 #ifndef TCSAFLUSH
  38 #define TCSAFLUSH 1
  39 #endif
  40
  41 #ifndef TCSANOW
  42 #define TCSANOW 0
  43 #endif
  44
  45 static int tcgetattr(int fd, struct termio *_t)
  46 {
  47         return ioctl(fd, TCGETA, _t);
  48 }
  49
  50 static int tcsetattr(int fd, int flags, struct termio *_t)
  51 {
  52         if(flags & TCSAFLUSH)
  53                 ioctl(fd, TCFLSH, TCIOFLUSH);
  54         return ioctl(fd, TCSETS, _t);
  55 }
  56
  57 #elif !defined(TCSAFLUSH)
  58
  59 /* BSD TERMIO HANDLING */
  60
  61 static struct sgttyb t;
  62
  63 #define ECHO_IS_ON(t) ((t).sg_flags & ECHO)
  64 #define TURN_ECHO_OFF(t) ((t).sg_flags &= ~ECHO)
  65 #define TURN_ECHO_ON(t) ((t).sg_flags |= ECHO)
  66
  67 #define TCSAFLUSH 1
  68 #define TCSANOW 0
  69
  70 static int tcgetattr(int fd, struct sgttyb *_t)
  71 {
  72         return ioctl(fd, TIOCGETP, (char *)_t);
  73 }
  74
  75 static int tcsetattr(int fd, int flags, struct sgttyb *_t)
  76 {
  77         return ioctl(fd, TIOCSETP, (char *)_t);
  78 }
  79
  80 #else /* POSIX TERMIO HANDLING */
  81 #define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
  82 #define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
  83 #define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
  84
  85 static struct termios t;
  86 #endif /* SYSV_TERMIO */
  87
  88 char *getsmbpass(const char *prompt)
  89 {
  90   FILE *in, *out;
  91   int echo_off;
  92   static char buf[256];
  93   static size_t bufsize = sizeof(buf);
  94   size_t nread;
  95
  96   /* Catch problematic signals */
  97   CatchSignal(SIGINT, SIGNAL_CAST SIG_IGN);
  98
  99   /* Try to write to and read from the terminal if we can.
 100      If we can't open the terminal, use stderr and stdin.  */
 101
 102   in = fopen ("/dev/tty", "w+");
 103   if (in == NULL)
 104     {
 105       in = stdin;
 106       out = stderr;
 107     }
 108   else
 109     out = in;
 110
 111   setvbuf(in, NULL, _IONBF, 0);
 112
 113   /* Turn echoing off if it is on now.  */
 114
 115   if (tcgetattr (fileno (in), &t) == 0)
 116     {
 117           if (ECHO_IS_ON(t))
 118         {
 119                 TURN_ECHO_OFF(t);
 120                 echo_off = tcsetattr (fileno (in), TCSAFLUSH, &t) == 0;
 121                 TURN_ECHO_ON(t);
 122         }
 123       else
 124         echo_off = 0;
 125     }
 126   else
 127     echo_off = 0;
 128
 129   /* Write the prompt.  */
 130   fputs (prompt, out);
 131   fflush (out);
 132
 133   /* Read the password.  */
 134   buf[0] = 0;
 135   fgets(buf, bufsize, in);
 136   nread = strlen(buf);
 137   if (buf[nread - 1] == '\n')
 138     buf[nread - 1] = '\0';
 139
 140   /* Restore echoing.  */
 141   if (echo_off)
 142     (void) tcsetattr (fileno (in), TCSANOW, &t);
 143
 144   if (in != stdin)
 145     /* We opened the terminal; now close it.  */
 146     fclose (in);
 147
 148   /* Catch problematic signals */
 149   CatchSignal(SIGINT, SIGNAL_CAST SIG_DFL);
 150
 151   printf("\n");
 152   return buf;
 153 }
 154
 155 #else
 156  void getsmbpasswd_dummy(void);
 157  void getsmbpasswd_dummy(void) {;}
 158 #endif