As I read this information from signal.h :
[CX<javascript:open_code('CX')>] [[Option Start]] The <signal.h> header shall
define the siginfo_t type as a structure, which shall include at least the
following members: [[Option End]]
[CX<javascript:open_code('CX')>][[Option Start]]
int si_signo Signal number.
int si_code Signal code.
[[Option End]]
[XSI<javascript:open_code('XSI')>][[Option Start]]
int si_errno If non-zero, an errno value associated with
this signal, as described in <errno.h>.
[[Option End]]
[CX<javascript:open_code('CX')>][[Option Start]]
pid_t si_pid Sending process ID.
uid_t si_uid Real user ID of sending process.
void *si_addr Address of faulting instruction.
int si_status Exit value or signal.
[[Option End]]
[OB XSR<javascript:open_code('OB%20XSR')>][[Option Start]]
long si_band Band event for SIGPOLL.
[[Option End]]
[CX<javascript:open_code('CX')>][[Option Start]]
union sigval si_value Signal value.
[[Option End]]
All of the above members MUST be available in all occurrences of siginfo_t,
whether or not they are applicable on a specific signal.
So can someone tell me how this siginfo_t definition matches the minimum set of
members for ALL instances of siginfo_t?
typedef struct siginfo
{
int si_signo; /* Signal number. */
int si_errno; /* If non-zero, an errno value associated with
this signal, as defined in <errno.h>. */
int si_code; /* Signal code. */
union
{
int _pad[__SI_PAD_SIZE];
/* kill(). */
struct
{
__pid_t si_pid; /* Sending process ID. */
__uid_t si_uid; /* Real user ID of sending process. */
} _kill;
/* POSIX.1b timers. */
struct
{
int si_tid; /* Timer ID. */
int si_overrun; /* Overrun count. */
sigval_t si_sigval; /* Signal value. */
} _timer;
/* POSIX.1b signals. */
struct
{
__pid_t si_pid; /* Sending process ID. */
__uid_t si_uid; /* Real user ID of sending process. */
sigval_t si_sigval; /* Signal value. */
} _rt;
/* SIGCHLD. */
struct
{
__pid_t si_pid; /* Which child. */
__uid_t si_uid; /* Real user ID of sending process. */
int si_status; /* Exit value or signal. */
__clock_t si_utime;
__clock_t si_stime;
} _sigchld;
/* SIGILL, SIGFPE, SIGSEGV, SIGBUS. */
struct
{
void *si_addr; /* Faulting insn/memory ref. */
} _sigfault;
/* SIGPOLL. */
struct
{
long int si_band; /* Band event for SIGPOLL. */
int si_fd;
} _sigpoll;
} _sifields;
} siginfo_t;
/* X/Open requires some more fields with fixed names. */
# define si_pid _sifields._kill.si_pid
# define si_uid _sifields._kill.si_uid
# define si_timerid _sifields._timer.si_tid
# define si_overrun _sifields._timer.si_overrun
# define si_status _sifields._sigchld.si_status
# define si_utime _sifields._sigchld.si_utime
# define si_stime _sifields._sigchld.si_stime
# define si_value _sifields._rt.si_sigval
# define si_int _sifields._rt.si_sigval.sival_int
# define si_ptr _sifields._rt.si_sigval.sival_ptr
# define si_addr _sifields._sigfault.si_addr
# define si_band _sifields._sigpoll.si_band
# define si_fd _sifields._sigpoll.si_fd
Jeff Fellin
