44 lines
665 B
C
44 lines
665 B
C
/*
|
|
* fopendev.c
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
FILE *fopendev(const struct dev_info *dev, const char *mode)
|
|
{
|
|
int flags = O_RDONLY;
|
|
int plus = 0;
|
|
int fd;
|
|
|
|
while ( *mode ) {
|
|
switch ( *mode ) {
|
|
case 'r':
|
|
flags = O_RDONLY;
|
|
break;
|
|
case 'w':
|
|
flags = O_WRONLY|O_CREAT|O_TRUNC;
|
|
break;
|
|
case 'a':
|
|
flags = O_WRONLY|O_CREAT|O_APPEND;
|
|
break;
|
|
case '+':
|
|
plus = 1;
|
|
break;
|
|
}
|
|
mode++;
|
|
}
|
|
|
|
if ( plus ) {
|
|
flags = (flags & ~(O_RDONLY|O_WRONLY)) | O_RDWR;
|
|
}
|
|
|
|
fd = opendev(file, flags);
|
|
|
|
if ( fd < 0 )
|
|
return NULL;
|
|
else
|
|
return fdopen(fd, mode);
|
|
}
|