@node wait, process
@subheading Syntax

@example
#include <sys/wait.h>

pid_t pid = wait(int *status);
@end example

@subheading Description

This function causes its caller to delay its execution until a signal
is received or one of its child processes terminates.  If any child has
terminated, return is immediate, returning the process ID and its exit
status, if that's available.  If no children processes were called since
the last call, then -1 is returned and @code{errno} is set.

@subheading Return Value

If successful, this function returns the exit status of the child.  If
there is an error, these functions return -1 and set @code{errno} to
indicate the error type.

@subheading Bugs

Currently, this function always fails.

@subheading Portability

@portability !ansi, posix

@c -----------------------------------------------------------------------
@node waitpid, process
@subheading Syntax

@example
#include <sys/wait.h>

pid_t pid = waitpid((pid_t pid, int *status, int options);
@end example

@subheading Description

Currently, this function always fails. A -1 is returned and @code{errno}
is set to indicate there are no children.

@subheading Return Value

If successful, this function returns the exit status of the child.  If
there is an error, these functions return -1 and set @code{errno} to
indicate the error type.

@subheading Bugs

Currently, this function always fails.


@subheading Portability

@portability !ansi, posix