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SELECT.H 3HEAD "Sep 10, 2004"
NAME
select.h, select - select types
SYNOPSIS

#include <sys/select.h>
DESCRIPTION

The <sys/select.h> header defines the timeval structure, which includes the following members:

time_t tv_sec /* seconds */
suseconds_t tv_usec /* microseconds */

The time_t and suseconds_t types are defined as described in <sys/types.h>. See types.h(3HEAD).

The sigset_t type is defined as described in signal.h(3HEAD).

The timespec structure is defined as described in <time.h>. See time.h(3HEAD).

The <sys/select.h> header defines the fd_set type as a structure.

The following is defined as a macro: FD_SETSIZE

Maximum number of file descriptors in an fd_set structure.

Inclusion of the <sys/select.h> header can make visible all symbols from the headers <signal.h>, <sys/time.h>, and <time.h>.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Standard
SEE ALSO

select(3C), signal.h(3HEAD), time.h(3HEAD), types.h(3HEAD), attributes(5), standards(5)