Getting Started with QNX Neutrino - QNX Software Systems

© 2009, QNX Software Systems GmbH & Co. KG. atoz.c
This appendix contains the complete versions of some of the sample programs
discussed in this book:
• atoz.c
• time1.c
• tp1.c
• tt1.c
atoz.c
For more information about this program, see the example in the “Returning directory
entries” section of the Resource Managers chapter.
/*
* atoz.c
*
* /dev/atoz using the resource manager library
*/
#include
#include
#include
#include
#include
#include
#include
#include
#define ALIGN(x) (((x) + 3) & ˜3)
#define NUM_ENTS 26
static iofunc_attr_t atoz_attrs [NUM_ENTS];
static int
my_open (resmgr_context_t *ctp, io_open_t *msg, iofunc_attr_t *attr, void *extra)
{
if (msg -> connect.path [0] == 0)
{ // the directory (/dev/atoz)
return (iofunc_open_default (ctp, msg, attr, extra));
} else if (msg -> connect.path [1] == 0 &&
(msg -> connect.path [0] >= ’a’ &&
msg -> connect.path [0] connect.path [0] - ’a’, extra));
} else {
return (ENOENT);
}
}
int
dirent_size (char *fname)
{
return (ALIGN (sizeof (struct dirent) - 4 + strlen (fname)));
}
struct dirent *
April 30, 2009 Appendix: C • Sample Programs 313