/mandos/release

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

  • Committer: Teddy Hogeborn
  • Date: 2008-07-31 19:48:05 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080731194805-mseis21dxwrdfqhk
* plugins.d/mandosclient.c (start_mandos_communication): Changed
                                                        "if_index" to
                                                        be of type
                                                        "AvahiIfIndex".
                                                        All callers
                                                        changed.
 (main): Add default values to "interface" and "if_index".  Only
         change if_index from default if "interface" was given.

* server.py (IPv6_TCPServer.server_bind): Bug fix: test if interface
                                          is empty, not if equal to
                                          avahi.IF_UNSPEC.
  (if_nametoindex): Bug fix; typo: assign to _func[0], not func[0].
  (main): Bug fix: Do not set service.interface unless the interface
          setting has been given.

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Lines of Context:
plugins.d/askpass-fifo.c
1
 
#define _GNU_SOURCE             /* TEMP_FAILURE_RETRY() */
2
 
#include <sys/types.h>          /* ssize_t */
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#include <sys/stat.h>           /* mkfifo(), S_IRUSR, S_IWUSR */
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#include <iso646.h>             /* and */
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#include <errno.h>              /* errno, EEXIST */
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#include <stdio.h>              /* perror() */
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#include <stdlib.h>             /* EXIT_FAILURE, NULL, size_t, free(), 
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                                   realloc(), EXIT_SUCCESS */
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#include <fcntl.h>              /* open(), O_RDONLY */
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#include <unistd.h>             /* read(), close(), write(),
11
 
                                   STDOUT_FILENO */
12
 
 
13
 
 
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int main(__attribute__((unused))int argc,
15
 
         __attribute__((unused))char **argv){
16
 
  int ret = 0;
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  ssize_t sret;
18
 
  
19
 
  /* Create FIFO */
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  const char passfifo[] = "/lib/cryptsetup/passfifo";
21
 
  ret = TEMP_FAILURE_RETRY(mkfifo(passfifo, S_IRUSR | S_IWUSR));
22
 
  if(ret == -1 and errno != EEXIST){
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    perror("mkfifo");
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    return EXIT_FAILURE;
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  }
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27
 
  /* Open FIFO */
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  int fifo_fd = TEMP_FAILURE_RETRY(open(passfifo, O_RDONLY));
29
 
  if(fifo_fd == -1){
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    perror("open");
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    return EXIT_FAILURE;
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  }
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  /* Read from FIFO */
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  char *buf = NULL;
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  size_t buf_len = 0;
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  {
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    size_t buf_allocated = 0;
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    const size_t blocksize = 1024;
40
 
    do{
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      if(buf_len + blocksize > buf_allocated){
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        char *tmp = realloc(buf, buf_allocated + blocksize);
43
 
        if(tmp == NULL){
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          perror("realloc");
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          free(buf);
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          return EXIT_FAILURE;
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        }
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        buf = tmp;
49
 
        buf_allocated += blocksize;
50
 
      }
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      sret = TEMP_FAILURE_RETRY(read(fifo_fd, buf + buf_len,
52
 
                                     buf_allocated - buf_len));
53
 
      if(sret == -1){
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        perror("read");
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        free(buf);
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        return EXIT_FAILURE;
57
 
      }
58
 
      buf_len += (size_t)sret;
59
 
    }while(sret != 0);
60
 
  }
61
 
  
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  /* Close FIFO */
63
 
  TEMP_FAILURE_RETRY(close(fifo_fd));
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  /* 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);
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      return EXIT_FAILURE;
74
 
    }
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    written += (size_t)sret;
76
 
  }
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  free(buf);
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  return EXIT_SUCCESS;
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}