_exit(2)                      System Calls Manual                     _exit(2)

JMENO
       _exit, _Exit - ukonci prave probihajici proces

KNIHOVNA
       Standardni knihovna C (libc, -lc)

POUZITI
       #include <unistd.h>

       [[noreturn]] void _exit(int status);

       #include <stdlib.h>

       [[noreturn]] void _Exit(int status);

   Pozaduje mnozinu testovacich maker pro glibc (viz feature_test_macros(7)):

       _Exit():
           _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

POPIS
       _exit()  terminates the calling process "immediately".  Any open file
       descriptors belonging to the process are closed.  Any children of the
       process are inherited by init(1)  (or by the nearest "subreaper"
       process as defined through the use of the prctl(2)
       PR_SET_CHILD_SUBREAPER operation).  The process's parent is sent a
       SIGCHLD signal.

       The value status & 0xFF is returned to the parent process as the
       process's exit status, and can be collected by the parent using one of
       the wait(2)  family of calls.

       Funkce  _Exit() je shodna s funkci _exit().

NAVRATOVE HODNOTY
       Funkce nic nevraci.

STANDARDY
       _exit()
              POSIX.1-2008.

       _Exit()
              C11, POSIX.1-2008.

HISTORIE
       POSIX.1-2001, SVr4, 4.3BSD.

       _Exit()  was introduced by C99.

POZNAMKY
       Pro dalsi informace o efektech funkce exit, jako napriklad prenos
       navratoveho stavu, zombie procesy, zasilani signalu, viz. exit(3).

       The function _exit()  is like exit(3), but does not call any functions
       registered with atexit(3)  or on_exit(3).  Open stdio(3)  streams are
       not flushed.  On the other hand, _exit()  does close open file
       descriptors, and this may cause an unknown delay, waiting for pending
       output to finish.  If the delay is undesired, it may be useful to call
       functions like tcflush(3)  before calling _exit().  Whether any pending
       I/O is canceled, and which pending I/O may be canceled upon _exit(), is
       implementation-dependent.

   knihovna C/jaderne rozdily
       The text above in DESCRIPTION describes the traditional effect of
       _exit(), which is to terminate a process, and these are the semantics
       specified by POSIX.1 and implemented by the C library wrapper function.
       On modern systems, this means termination of all threads in the
       process.

       By contrast with the C library wrapper function, the raw Linux _exit()
       system call terminates only the calling thread, and actions such as
       reparenting child processes or sending SIGCHLD to the parent process
       are performed only if this is the last thread in the thread group.

       Up to glibc 2.3, the _exit()  wrapper function invoked the kernel
       system call of the same name.  Since glibc 2.3, the wrapper function
       invokes exit_group(2), in order to terminate all of the threads in a
       process.

DALSI INFORMACE
       execve(2), exit_group(2), fork(2), kill(2), wait(2), wait4(2),
       waitpid(2), atexit(3), exit(3), on_exit(3), termios(3)

PREKLAD
       Preklad teto prirucky do cestiny vytvorili Pavel Heimlich
       <tropikhajma@gmail.com>

       Tento preklad je bezplatna dokumentace; Prectete si GNU General Public
       License Version 3 <https://www.gnu.org/licenses/gpl-3.0.html> nebo
       novejsi ohledne podminek autorskych prav. Neexistuje ZADNA ODPOVEDNOST.

       Pokud narazite na nejake chyby v prekladu teto prirucky, poslete e-mail
       na adresu <translation-team-cs@lists.sourceforge.net>.

Linux man-pages 6.15            17. kvetna 2025                       _exit(2)