Get the timers owned by the process associated with the file descriptor.

#include <sys/procfs.h>

#define DCMD_PROC_TIMERS   __DIOF(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 23, procfs_timer)

The arguments to devctl() are:

Argument Value
filedes A file descriptor for the process.
dev_data_ptr NULL, or an array of procfs_timer structures
n_bytes 0, or the size of the array
dev_info_ptr A pointer to an integer where the number of timers can be stored

Call this the first time with an argument of NULL to get the number of timers:

devctl( fd, DCMD_PROC_TIMERS, NULL, 0, &n);

Next, allocate a buffer that's large enough to hold a procfs_timer structure for each timer, and pass it to another devctl() call:

my_buffer = (procfs_timer *) malloc( sizeof(procfs_timer) * n;
if ( my_buffer == NULL ) {
  /* Not enough memory. */

devctl( fd, DCMD_PROC_TIMERS, my_buffer,
        sizeof(procfs_timer) * n, &dummy);

The procfs_timer structure is the same as the debug_timer_t structure, which is defined as follows in <sys/debug.h>:

typedef struct _debug_timer {
        timer_t              id;
        unsigned             spare;
        struct _timer_info   info;
} debug_timer_t;

For information about the _timer_info structure, see the entry for TimerInfo() in the QNX Neutrino C Library Reference, and the section on DCMD_PROC_INFO in the appendix about the /procfs filesystem in The QNX Neutrino Cookbook.