/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
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/*  -*- coding: utf-8 -*- */
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/*
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 * Passprompt - Read a password from the terminal and print it
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 *
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 * Copyright © 2007-2008 Teddy Hogeborn and Björn Påhlsson.
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 * 
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 * This program is free software: you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License as
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 * published by the Free Software Foundation, either version 3 of the
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 * License, or (at your option) any later version.
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 * 
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 * This program is distributed in the hope that it will be useful, but
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 * WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * General Public License for more details.
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 * 
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 * You should have received a copy of the GNU General Public License
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 * along with this program.  If not, see
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 * <http://www.gnu.org/licenses/>.
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 * 
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 * Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
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 * <https://www.fukt.bsnet.se/~teddy/>.
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 */
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13 by Björn Påhlsson
Added following support:
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#define _GNU_SOURCE		/* getline() */
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#define _FORTIFY_SOURCE 2
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
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13 by Björn Påhlsson
Added following support:
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#include <termios.h> 		/* struct termios, tcsetattr(),
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				   TCSAFLUSH, tcgetattr(), ECHO */
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#include <unistd.h>		/* struct termios, tcsetattr(),
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				   STDIN_FILENO, TCSAFLUSH,
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				   tcgetattr(), ECHO */
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#include <signal.h>		/* sig_atomic_t, raise(), struct
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				   sigaction, sigemptyset(),
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				   sigaction(), sigaddset(), SIGINT,
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				   SIGQUIT, SIGHUP, SIGTERM */
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#include <stddef.h>		/* NULL, size_t */
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#include <sys/types.h>		/* ssize_t */
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
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#include <stdlib.h>		/* EXIT_SUCCESS, EXIT_FAILURE,
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				   getopt_long */
13 by Björn Påhlsson
Added following support:
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#include <stdio.h>		/* fprintf(), stderr, getline(),
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				   stdin, feof(), perror(), fputc(),
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
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				   stdout, getopt_long */
13 by Björn Påhlsson
Added following support:
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#include <errno.h>		/* errno, EINVAL */
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#include <iso646.h>		/* or, not */
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#include <stdbool.h>		/* bool, false, true */
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
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#include <string.h> 		/* strlen, rindex, strncmp, strcmp */
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
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#include <getopt.h>		/* getopt_long */
13 by Björn Påhlsson
Added following support:
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volatile bool quit_now = false;
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
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bool debug = false;
13 by Björn Påhlsson
Added following support:
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21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
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void termination_handler(__attribute__((unused))int signum){
13 by Björn Påhlsson
Added following support:
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  quit_now = true;
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}
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int main(int argc, char **argv){
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
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  ssize_t ret;
13 by Björn Påhlsson
Added following support:
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  size_t n;
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  struct termios t_new, t_old;
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  char *buffer = NULL;
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
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  char *prefix = NULL;
13 by Björn Påhlsson
Added following support:
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  int status = EXIT_SUCCESS;
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  struct sigaction old_action,
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    new_action = { .sa_handler = termination_handler,
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		   .sa_flags = 0 };
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
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  while (true){
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    static struct option long_options[] = {
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      {"debug", no_argument, (int *)&debug, 1},
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      {"prefix", required_argument, 0, 'p'},
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      {0, 0, 0, 0} };
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    int option_index = 0;
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    ret = getopt_long (argc, argv, "p:", long_options, &option_index);
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    if (ret == -1){
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      break;
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    }
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    switch(ret){
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    case 0:
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      break;
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    case 'p':
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      prefix = optarg;
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      break;
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    default:
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      fprintf(stderr, "bad arguments\n");
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      exit(EXIT_FAILURE);
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    }
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  }
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15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
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  if (debug){
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    fprintf(stderr, "Starting %s\n", argv[0]);
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  }
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  if (debug){
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    fprintf(stderr, "Storing current terminal attributes\n");
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  }
13 by Björn Påhlsson
Added following support:
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  if (tcgetattr(STDIN_FILENO, &t_old) != 0){
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    return EXIT_FAILURE;
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  }
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  sigemptyset(&new_action.sa_mask);
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  sigaddset(&new_action.sa_mask, SIGINT);
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  sigaddset(&new_action.sa_mask, SIGQUIT);
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  sigaddset(&new_action.sa_mask, SIGHUP);
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  sigaddset(&new_action.sa_mask, SIGTERM);
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  sigaction(SIGINT, NULL, &old_action);
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  if (old_action.sa_handler != SIG_IGN)
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    sigaction(SIGINT, &new_action, NULL);
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  sigaction(SIGQUIT, NULL, &old_action);
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  if (old_action.sa_handler != SIG_IGN)
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    sigaction(SIGQUIT, &new_action, NULL);
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  sigaction(SIGHUP, NULL, &old_action);
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  if (old_action.sa_handler != SIG_IGN)
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    sigaction(SIGHUP, &new_action, NULL);
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  sigaction(SIGTERM, NULL, &old_action);
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  if (old_action.sa_handler != SIG_IGN)
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    sigaction(SIGTERM, &new_action, NULL);
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
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  if (debug){
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    fprintf(stderr, "Removing echo flag from terminal attributes\n");
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  }
13 by Björn Påhlsson
Added following support:
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  t_new = t_old;
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  t_new.c_lflag &= ~ECHO;
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  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
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    perror("tcsetattr-echo");
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    return EXIT_FAILURE;
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  }
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
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  if (debug){
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    fprintf(stderr, "Waiting for input from stdin \n");
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  }
13 by Björn Påhlsson
Added following support:
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  while(true){
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    if (quit_now){
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      status = EXIT_FAILURE;
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      break;
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    }
15.1.3 by Björn Påhlsson
Added getopt_long support for mandosclient and passprompt
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    if(prefix){
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      fprintf(stderr, "%s Password: ", prefix);
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    } else {
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      fprintf(stderr, "Password: ");
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    }      
13 by Björn Påhlsson
Added following support:
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    ret = getline(&buffer, &n, stdin);
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    if (ret > 0){
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      fprintf(stdout, "%s", buffer);
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      status = EXIT_SUCCESS;
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      break;
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    }
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    // ret == 0 makes no other sence than to retry to read from stdin
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    if (ret < 0){
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      if (errno != EINTR and not feof(stdin)){
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	perror("getline");
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	status = EXIT_FAILURE;
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	break;
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      }
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    }
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    fputc('\n', stderr);
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  }
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15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
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  if (debug){
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    fprintf(stderr, "Restoring terminal attributes\n");
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  }
13 by Björn Påhlsson
Added following support:
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  if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
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    perror("tcsetattr+echo");
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  }
15.1.2 by Björn Påhlsson
Added debug options from passprompt as --debug and --debug=passprompt
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  if (debug){
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    fprintf(stderr, "%s is exiting\n", argv[0]);
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  }
13 by Björn Påhlsson
Added following support:
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  return status;
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}