/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release

« back to all changes in this revision

Viewing changes to plugins.d/askpass-fifo.c

  • Committer: Teddy Hogeborn
  • Date: 2008-10-04 03:11:39 UTC
  • Revision ID: teddy@fukt.bsnet.se-20081004031139-llfxo3ac8kk4fs6b
* Makefile (DOCS): Added "plugins.d/usplash.8mandos" and
                   "plugins.d/splashy.8mandos".
  (install-client-nokey): Also install "plugins.d/usplash.8mandos" and
                          "plugins.d/splashy.8mandos".
  (uninstall-client): Also uninstall "plugins.d/usplash.8mandos" and
                      "plugins.d/splashy.8mandos".

* plugins.d/splashy.xml: New.

* plugins.d/usplash.xml: - '' -

Show diffs side-by-side

added added

removed removed

Lines of Context:
plugins.d/askpass-fifo.c
 
1
#define _GNU_SOURCE             /* TEMP_FAILURE_RETRY() */
 
2
#include <sys/types.h>          /* ssize_t */
 
3
#include <sys/stat.h>           /* mkfifo(), S_IRUSR, S_IWUSR */
 
4
#include <iso646.h>             /* and */
 
5
#include <errno.h>              /* errno, EEXIST */
 
6
#include <stdio.h>              /* perror() */
 
7
#include <stdlib.h>             /* EXIT_FAILURE, NULL, size_t, free(), 
 
8
                                   realloc(), EXIT_SUCCESS */
 
9
#include <fcntl.h>              /* open(), O_RDONLY */
 
10
#include <unistd.h>             /* read(), close(), write(),
 
11
                                   STDOUT_FILENO */
 
12
 
 
13
 
 
14
int main(__attribute__((unused))int argc,
 
15
         __attribute__((unused))char **argv){
 
16
  int ret = 0;
 
17
  ssize_t sret;
 
18
  
 
19
  /* Create FIFO */
 
20
  const char passfifo[] = "/lib/cryptsetup/passfifo";
 
21
  ret = TEMP_FAILURE_RETRY(mkfifo(passfifo, S_IRUSR | S_IWUSR));
 
22
  if(ret == -1 and errno != EEXIST){
 
23
    perror("mkfifo");
 
24
    return EXIT_FAILURE;
 
25
  }
 
26
  
 
27
  /* Open FIFO */
 
28
  int fifo_fd = TEMP_FAILURE_RETRY(open(passfifo, O_RDONLY));
 
29
  if(fifo_fd == -1){
 
30
    perror("open");
 
31
    return EXIT_FAILURE;
 
32
  }
 
33
  
 
34
  /* Read from FIFO */
 
35
  char *buf = NULL;
 
36
  size_t buf_len = 0;
 
37
  {
 
38
    size_t buf_allocated = 0;
 
39
    const size_t blocksize = 1024;
 
40
    do{
 
41
      if(buf_len + blocksize > buf_allocated){
 
42
        char *tmp = realloc(buf, buf_allocated + blocksize);
 
43
        if(tmp == NULL){
 
44
          perror("realloc");
 
45
          free(buf);
 
46
          return EXIT_FAILURE;
 
47
        }
 
48
        buf = tmp;
 
49
        buf_allocated += blocksize;
 
50
      }
 
51
      sret = TEMP_FAILURE_RETRY(read(fifo_fd, buf + buf_len,
 
52
                                     buf_allocated - buf_len));
 
53
      if(sret == -1){
 
54
        perror("read");
 
55
        free(buf);
 
56
        return EXIT_FAILURE;
 
57
      }
 
58
      buf_len += (size_t)sret;
 
59
    }while(sret != 0);
 
60
  }
 
61
  
 
62
  /* Close FIFO */
 
63
  TEMP_FAILURE_RETRY(close(fifo_fd));
 
64
  
 
65
  /* Print password to stdout */
 
66
  size_t written = 0;
 
67
  while(written < buf_len){
 
68
    sret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buf + written,
 
69
                                    buf_len - written));
 
70
    if(sret == -1){
 
71
      perror("write");
 
72
      free(buf);
 
73
      return EXIT_FAILURE;
 
74
    }
 
75
    written += (size_t)sret;
 
76
  }
 
77
  free(buf);
 
78
  
 
79
  return EXIT_SUCCESS;
 
80
}