aboutsummaryrefslogtreecommitdiffstats
path: root/COPYING
diff options
context:
space:
mode:
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-21 20:30:43 +0000
/a> 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 
/*
 * For license terms, see the file COPYING in this directory.
 */

/***********************************************************************
  module:       getpass.c
  project:      fetchmail
  programmer:   Carl Harris, ceharris@mal.com
  description: 	getpass() replacement which allows for long passwords.

 ***********************************************************************/

#include <config.h>
#include <stdio.h>
#include <signal.h>
#include <fcntl.h>
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include "fetchmail.h"

extern int optind;

#define INPUT_BUF_SIZE	PASSWORDLEN

#if defined(HAVE_TERMIOS_H) && defined(HAVE_TCSETATTR)
#  include <termios.h>
#else
#if defined(HAVE_TERMIO_H)
#  include <sys/ioctl.h>
#  include <termio.h>
#else
#if defined(HAVE_SGTTY_H)
#  include <sgtty.h>
#endif
#endif
#endif

static int ttyfd;

#if defined(HAVE_TCSETATTR)
  static struct termios termb;
  static tcflag_t flags;
#else
#if defined(HAVE_TERMIO_H)
  static struct termio termb;
  static unsigned short flags;
#else
#if defined(HAVE_STTY)
  static struct sgttyb ttyb;
  static int flags;
#endif
#endif
#endif

void save_tty_state();
void disable_tty_echo();
void restore_tty_state();

char *
getpassword(prompt)
char *prompt;
{

#if !(defined(HAVE_TCSETATTR) || defined(HAVE_TERMIO_H) || defined(HAVE_STTY))

#if defined(HAVE_GETPASS) 
  char *getpass();
  return getpass(prompt);
#else
  fputs("ERROR: no support for getpassword() routine\n",stderr);
  exit(1);
#endif

#endif /* !(defined(HAVE_TCSETATTR) || ... */

  register char *p;
  register c;
  FILE *fi;
  static char pbuf[INPUT_BUF_SIZE];
  RETSIGTYPE (*sig)();
  RETSIGTYPE sigint_handler();


  /* get the file descriptor for the input device */
  if ((fi = fdopen(open("/dev/tty", 2), "r")) == NULL)
    fi = stdin;
  else
    setbuf(fi, (char *)NULL);

  /* store descriptor for the tty */
  ttyfd = fileno(fi);

  /* preserve tty state before turning off echo */
  save_tty_state();

  /* now that we have the current tty state, we can catch SIGINT and  
     exit gracefully */
  sig = signal(SIGINT, sigint_handler);

  /* turn off echo on the tty */
  disable_tty_echo();

  /* display the prompt and get the input string */
  fprintf(stderr, "%s", prompt); fflush(stderr);
  for (p=pbuf; (c = getc(fi))!='\n' && c!=EOF;) {
    if (p < &pbuf[INPUT_BUF_SIZE - 1])
      *p++ = c;
  }
  *p = '\0';

  /* write a newline so cursor won't appear to hang */
  fprintf(stderr, "\n"); fflush(stderr);

  /* restore previous state of the tty */
  restore_tty_state();

  /* restore previous state of SIGINT */
  signal(SIGINT, sig);

  if (fi != stdin)
    fclose(fi);

  return(pbuf);

}


void
save_tty_state ()
{
#if defined(HAVE_TCSETATTR)
  tcgetattr(ttyfd, &termb);
  flags = termb.c_lflag;
#else
#if defined(HAVE_TERMIO_H)
  ioctl(ttyfd, TCGETA, (char *) &termb);
  flags = termb.c_lflag;
#else  /* we HAVE_STTY */
  gtty(ttyfd, &ttyb);
  flags = ttyb.sg_flags;
#endif
#endif
}


void
disable_tty_echo() 
{
  /* turn off echo on the tty */
#if defined(HAVE_TCSETATTR)
  termb.c_lflag &= ~ECHO;
  tcsetattr(ttyfd, TCSAFLUSH, &termb);
#else
#if defined(HAVE_TERMIO_H)
  termb.c_lflag &= ~ECHO;
  ioctl(ttyfd, TCSETA, (char *) &termb);
#else  /* we HAVE_STTY */
  ttyb.sg_flags &= ~ECHO;
  stty(ttyfd, &ttyb);
#endif
#endif
}



void
restore_tty_state()
{
  /* restore previous tty echo state */
#if defined(HAVE_TCSETATTR)
  termb.c_lflag = flags;
  tcsetattr(ttyfd, TCSAFLUSH, &termb);
#else
#if defined(HAVE_TERMIO_H)
  termb.c_lflag = flags;
  ioctl(ttyfd, TCSETA, (char *) &termb);
#else  /* we HAVE_STTY */
  ttyb.sg_flags = flags;
  stty(ttyfd, &ttyb);
#endif
#endif
}


RETSIGTYPE sigint_handler ()
{
  restore_tty_state();
  error(1, 0, "\nCaught signal... bailing out.");
}