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   getpgid.3p    ( 3 )

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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.

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Имя (Name)

getpgid — get the process group ID for a process

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Синопсис (Synopsis)

#include <unistd.h>

       pid_t getpgid(pid_t pid);

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Описание (Description)

The getpgid() function shall return the process group ID of the
       process whose process ID is equal to pid.  If pid is equal to 0,
       getpgid() shall return the process group ID of the calling
       process.

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Возвращаемое значение (Return value)

Upon successful completion, getpgid() shall return a process
       group ID. Otherwise, it shall return (pid_t)-1 and set errno to
       indicate the error.

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Ошибки (Error)

The getpgid() function shall fail if:

       EPERM  The process whose process ID is equal to pid is not in the
              same session as the calling process, and the
              implementation does not allow access to the process group
              ID of that process from the calling process.

       ESRCH  There is no process with a process ID equal to pid.

       The getpgid() function may fail if:

       EINVAL The value of the pid argument is invalid.

       The following sections are informative.

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Примеры (Examples)

None.

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Использование в приложениях (Application usage)

None.

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Обоснование (Rationale)

None.

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Будущие направления (Future directions)

None.

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Смотри также (See also)

exec(1p), fork(3p), getpgrp(3p), getpid(3p), getsid(3p),
       setpgid(3p), setsid(3p)

       The Base Definitions volume of POSIX.1‐2017, unistd.h(0p)

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