source/lib/getsmbpass.c

   1 /* Copyright (C) 1992, 1993, 1994 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
  23 #ifdef REPLACE_GETPASS
  24
  25 #ifdef SYSV_TERMIO
  26
  27 /* SYSTEM V TERMIO HANDLING */
  28
  29 static struct termio t;
  30
  31 #define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
  32 #define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
  33 #define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
  34
  35 #ifndef TCSAFLUSH
  36 #define TCSAFLUSH 1
  37 #endif
  38
  39 #ifndef TCSANOW
  40 #define TCSANOW 0
  41 #endif
  42
  43  int tcgetattr(int fd, struct termio *t)
  44 {
  45         return ioctl(fd, TCGETA, t);
  46 }
  47
  48  int tcsetattr(int fd, int flags, const struct termio *t)
  49 {
  50         if(flags & TCSAFLUSH)
  51                 ioctl(fd, TCFLSH, TCIOFLUSH);
  52         return ioctl(fd, TCSETS, t);
  53 }
  54
  55 #else /* SYSV_TERMIO */
  56 #ifdef BSD_TERMIO
  57
  58 /* BSD TERMIO HANDLING */
  59
  60 static struct sgttyb t;
  61
  62 #define ECHO_IS_ON(t) ((t).sg_flags & ECHO)
  63 #define TURN_ECHO_OFF(t) ((t).sg_flags &= ~ECHO)
  64 #define TURN_ECHO_ON(t) ((t).sg_flags |= ECHO)
  65
  66 #ifndef TCSAFLUSH
  67 #define TCSAFLUSH 1
  68 #endif
  69
  70 #ifndef TCSANOW
  71 #define TCSANOW 0
  72 #endif
  73
  74  int tcgetattr(int fd, struct sgttyb *t)
  75 {
  76         return ioctl(fd, TIOCGETP, (char *)t);
  77 }
  78
  79  int tcsetattr(int fd, int flags, const struct sgttyb *t)
  80 {
  81         return ioctl(fd, TIOCSETP, (char *)t);
  82 }
  83
  84 #else /* BSD_TERMIO */
  85
  86 /* POSIX TERMIO HANDLING */
  87 #define ECHO_IS_ON(t) ((t).c_lflag & ECHO)
  88 #define TURN_ECHO_OFF(t) ((t).c_lflag &= ~ECHO)
  89 #define TURN_ECHO_ON(t) ((t).c_lflag |= ECHO)
  90
  91 static struct termios t;
  92 #endif /* BSD_TERMIO */
  93 #endif /* SYSV_TERMIO */
  94
  95 char *getsmbpass(char *prompt)
  96 {
  97   FILE *in, *out;
  98   int echo_off;
  99   static char buf[256];
 100   static size_t bufsize = sizeof(buf);
 101   size_t nread;
 102
 103   /* Catch problematic signals */
 104   signal(SIGINT, SIGNAL_CAST SIG_IGN);
 105
 106   /* Try to write to and read from the terminal if we can.
 107      If we can't open the terminal, use stderr and stdin.  */
 108
 109   in = fopen ("/dev/tty", "w+");
 110   if (in == NULL)
 111     {
 112       in = stdin;
 113       out = stderr;
 114     }
 115   else
 116     out = in;
 117
 118   setvbuf(in, NULL, _IONBF, 0);
 119
 120   /* Turn echoing off if it is on now.  */
 121
 122   if (tcgetattr (fileno (in), &t) == 0)
 123     {
 124           if (ECHO_IS_ON(t))
 125         {
 126                 TURN_ECHO_OFF(t);
 127                 echo_off = tcsetattr (fileno (in), TCSAFLUSH, &t) == 0;
 128                 TURN_ECHO_ON(t);
 129         }
 130       else
 131         echo_off = 0;
 132     }
 133   else
 134     echo_off = 0;
 135
 136   /* Write the prompt.  */
 137   fputs (prompt, out);
 138   fflush (out);
 139
 140   /* Read the password.  */
 141   buf[0] = 0;
 142   fgets(buf, bufsize, in);
 143   nread = strlen(buf);
 144   if (buf[nread - 1] == '\n')
 145     buf[nread - 1] = '\0';
 146
 147   /* Restore echoing.  */
 148   if (echo_off)
 149     (void) tcsetattr (fileno (in), TCSANOW, &t);
 150
 151   if (in != stdin)
 152     /* We opened the terminal; now close it.  */
 153     fclose (in);
 154
 155   /* Catch problematic signals */
 156   signal(SIGINT, SIGNAL_CAST SIG_DFL);
 157
 158   printf("\n");
 159   return buf;
 160 }
 161
 162 #else
 163
 164  void getsmbpasswd_dummy() {;}
 165 #endif