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   sys_wait.h.0p    ( 10 )

объявления для ожидания (declarations for waiting)

Пролог (Prolog)

This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior),
       or the interface may not be implemented on Linux.

Имя (Name)

sys/wait.h — declarations for waiting

Синопсис (Synopsis)

#include <sys/wait.h>

Описание (Description)

The <sys/wait.h> header shall define the following symbolic
       constants for use with waitpid():

WCONTINUED Report status of continued child process.

WNOHANG Do not hang if no status is available; return immediately.

WUNTRACED Report status of stopped child process.

The <sys/wait.h> header shall define the following macros for analysis of process status values:

WEXITSTATUS Return exit status.

WIFCONTINUED True if child has been continued.

WIFEXITED True if child exited normally.

WIFSIGNALED True if child exited due to uncaught signal.

WIFSTOPPED True if child is currently stopped.

WSTOPSIG Return signal number that caused process to stop.

WTERMSIG Return signal number that caused process to terminate.

The <sys/wait.h> header shall define the following symbolic constants as possible values for the options argument to waitid():

WEXITED Wait for processes that have exited.

WNOWAIT Keep the process whose status is returned in infop in a waitable state.

WSTOPPED Status is returned for any child that has stopped upon receipt of a signal.

The WCONTINUED and WNOHANG constants, described above for waitpid(), can also be used with waitid().

The type idtype_t shall be defined as an enumeration type whose possible values shall include at least the following: P_ALL P_PGID P_PID

The <sys/wait.h> header shall define the id_t and pid_t types as described in <sys/types.h>.

The <sys/wait.h> header shall define the siginfo_t type and the sigval union as described in <signal.h>.

Inclusion of the <sys/wait.h> header may also make visible all symbols from <signal.h>.

The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.

pid_t wait(int *); int waitid(idtype_t, id_t, siginfo_t *, int); pid_t waitpid(pid_t, int *, int);

The following sections are informative.


Использование в приложениях (Application usage)

None.

Обоснование (Rationale)

None.

Будущие направления (Future directions)

None.

Смотри также (See also)

signal.h(0p), sys_resource.h(0p), sys_types.h(0p)

The System Interfaces volume of POSIX.1‐2017, wait(3p), waitid(3p)