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