DCMD_PROC_STATUS

Get the current status of the current thread in the process associated with the file descriptor.

#include <sys/procfs.h>

#define DCMD_PROC_STATUS32  (__DIOF(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 7, procfs_status32))
#define DCMD_PROC_STATUS64  (__DIOF(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 7, procfs_status64))
#define DCMD_PROC_STATUS    (__DIOF(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 7, procfs_status))

Note: The generic command maps onto the 64-bit version, unless you're compiling for a 32-bit architecture and you define WANT_OLD_DEVCTLS before you include <sys/procfs.h>.

The arguments to devctl() are:

Argument	Value
`filedes`	A file descriptor for the process.
`dcmd`	DCMD_PROC_STATUS
`dev_data_ptr`	A pointer to a procfs_status structure
`n_bytes`	`sizeof(procfs_status)`
`dev_info_ptr`	NULL

The argument is a pointer to a procfs_status structure (see debug_thread_t in <sys/debug.h>) that's filled in with the required information on return. For example:

procfs_status my_status;

devctl( fd, DCMD_PROC_STATUS, &my_status, sizeof(my_status),
        NULL);

Note: If the current thread no longer exists, the process manager returns information about the one with the next higher thread ID. If there are no threads with a higher ID, devctl() returns ESRCH.

For more information about the contents of this structure, see “Thread information,” earlier in this chapter.