установить идентификатор группы процессов переднего плана (set the foreground process group ID)
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)
tcsetpgrp — set the foreground process group ID
Синопсис (Synopsis)
#include <unistd.h>
int tcsetpgrp(int fildes, pid_t pgid_id);
Описание (Description)
If the process has a controlling terminal, tcsetpgrp() shall set
the foreground process group ID associated with the terminal to
pgid_id. The application shall ensure that the file associated
with fildes is the controlling terminal of the calling process
and the controlling terminal is currently associated with the
session of the calling process. The application shall ensure that
the value of pgid_id matches a process group ID of a process in
the same session as the calling process.
Attempts to use tcsetpgrp() from a process which is a member of a
background process group on a fildes associated with its
controlling terminal shall cause the process group to be sent a
SIGTTOU signal. If the calling thread is blocking SIGTTOU signals
or the process is ignoring SIGTTOU signals, the process shall be
allowed to perform the operation, and no signal is sent.
Возвращаемое значение (Return value)
Upon successful completion, 0 shall be returned. Otherwise, -1
shall be returned and errno set to indicate the error.
Ошибки (Error)
The tcsetpgrp() function shall fail if:
EBADF The fildes argument is not a valid file descriptor.
EINVAL This implementation does not support the value in the
pgid_id argument.
EIO The process group of the writing process is orphaned, the
calling thread is not blocking SIGTTOU, and the process is
not ignoring SIGTTOU.
ENOTTY The calling process does not have a controlling terminal,
or the file is not the controlling terminal, or the
controlling terminal is no longer associated with the
session of the calling process.
EPERM The value of pgid_id is a value supported by the
implementation, but does not match the process group ID of
a process in the same session as the calling process.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
tcgetpgrp(3p)
The Base Definitions volume of POSIX.1‐2017, sys_types.h(0p),
unistd.h(0p)
