usr/src/lib/libast/common/uwin/getpass.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #include "FEATURE/uwin"
  23
  24 #if !_UWIN || _lib_getpass
  25
  26 void _STUB_getpass(){}
  27
  28 #else
  29
  30 #pragma prototyped
  31
  32 #define getpass ______getpass
  33
  34 #include        <ast.h>
  35 #include        <termios.h>
  36 #include        <signal.h>
  37
  38 #undef  getpass
  39
  40 #if defined(__EXPORT__)
  41 #define extern          __EXPORT__
  42 #endif
  43
  44 static int interrupt;
  45 static void handler(int sig)
  46 {
  47         interrupt++;
  48 }
  49
  50 extern char*    getpass(const char *prompt)
  51 {
  52         struct termios told,tnew;
  53         Sfio_t *iop;
  54         static char *cp, passwd[32];
  55         void (*savesig)(int);
  56         if(!(iop = sfopen((Sfio_t*)0, "/dev/tty", "r")))
  57                 return(0);
  58         if(tcgetattr(sffileno(iop),&told) < 0)
  59                 return(0);
  60         interrupt = 0;
  61         tnew = told;
  62         tnew.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL);
  63         if(tcsetattr(sffileno(iop),TCSANOW,&tnew) < 0)
  64                 return(0);
  65         savesig = signal(SIGINT, handler);
  66         sfputr(sfstderr,prompt,-1);
  67         if(cp = sfgetr(iop,'\n',1))
  68                 strncpy(passwd,cp,sizeof(passwd)-1);
  69         tcsetattr(sffileno(iop),TCSANOW,&told);
  70         sfputc(sfstderr,'\n');
  71         sfclose(iop);
  72         signal(SIGINT, savesig);
  73         if(interrupt)
  74                 kill(getpid(),SIGINT);
  75         return(cp?passwd:0);
  76 }
  77
  78
  79 #endif