получить идентификатор сеанса (get session ID)
Имя (Name)
getsid - get session ID
Синопсис (Synopsis)
#include <unistd.h>
pid_t getsid(pid_t pid);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
getsid():
_XOPEN_SOURCE >= 500
|| /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
Описание (Description)
getsid(0) returns the session ID of the calling process.
getsid() returns the session ID of the process with process ID
pid. If pid is 0, getsid() returns the session ID of the calling
process.
Возвращаемое значение (Return value)
On success, a session ID is returned. On error, (pid_t) -1 is
returned, and errno is set to indicate the error.
Ошибки (Error)
EPERM A process with process ID pid exists, but it is not in the
same session as the calling process, and the
implementation considers this an error.
ESRCH No process with process ID pid was found.
Версии (Versions)
This system call is available on Linux since version 2.0.
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008, SVr4.
Примечание (Note)
Linux does not return EPERM.
See credentials(7) for a description of sessions and session IDs.
Смотри также (See also)
getpgid(2), setsid(2), credentials(7)
