26
26
#include <sys/types.h> /* ssize_t */
27
27
#include <sys/stat.h> /* mkfifo(), S_IRUSR, S_IWUSR */
28
28
#include <iso646.h> /* and */
29
#include <errno.h> /* errno, EACCES, ENOTDIR, ELOOP,
30
ENAMETOOLONG, ENOSPC, EROFS,
31
ENOENT, EEXIST, EFAULT, EMFILE,
32
ENFILE, ENOMEM, EBADF, EINVAL, EIO,
34
#include <error.h> /* error() */
29
#include <errno.h> /* errno, EEXIST */
30
#include <stdio.h> /* perror() */
35
31
#include <stdlib.h> /* EXIT_FAILURE, NULL, size_t, free(),
36
32
realloc(), EXIT_SUCCESS */
37
33
#include <fcntl.h> /* open(), O_RDONLY */
38
34
#include <unistd.h> /* read(), close(), write(),
40
#include <sysexits.h> /* EX_OSERR, EX_OSFILE,
41
EX_UNAVAILABLE, EX_IOERR */
44
38
int main(__attribute__((unused))int argc,
50
44
const char passfifo[] = "/lib/cryptsetup/passfifo";
51
45
ret = mkfifo(passfifo, S_IRUSR | S_IWUSR);
54
error(0, errno, "mkfifo");
66
return EX_UNAVAILABLE; /* no "/lib/cryptsetup"? */
68
break; /* not an error */
46
if(ret == -1 and errno != EEXIST){
73
52
int fifo_fd = open(passfifo, O_RDONLY);
76
error(0, errno, "open");
81
return EX_UNAVAILABLE;
94
58
/* Read from FIFO */
101
65
if(buf_len + blocksize > buf_allocated){
102
66
char *tmp = realloc(buf, buf_allocated + blocksize);
104
error(0, errno, "realloc");
109
73
buf_allocated += blocksize;
111
75
sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
116
error(0, errno, "read");
126
return EX_UNAVAILABLE;
129
81
buf_len += (size_t)sret;
130
82
} while(sret != 0);
138
90
while(written < buf_len){
139
91
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
144
error(0, errno, "write");
157
97
written += (size_t)sret;
161
ret = close(STDOUT_FILENO);
164
error(0, errno, "close");
173
101
return EXIT_SUCCESS;