Section: Linux Programmer's Manual (2)
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_exit, _Exit - terminate the calling process
void _exit(int status);
void _Exit(int status);
Feature Test Macro Requirements for glibc (see
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
_POSIX_C_SOURCE >= 200112L;
terminates the calling process "immediately".
Any open file descriptors
belonging to the process are closed; any children of the process are
inherited by process 1,
and the process's parent is sent a
is returned to the parent process as the process's exit status, and
can be collected using one of the
family of calls.
is equivalent to
These functions do not return.
SVr4, POSIX.1-2001, 4.3BSD.
was introduced by C99.
For a discussion on the effects of an exit, the transmission of
exit status, zombie processes, signals sent, and so on, see
but does not call any
functions registered with
Whether it flushes
standard I/O buffers and removes temporary files created with
On the other hand,
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
Whether any pending I/O is canceled, and which pending I/O may be
In glibc up to version 2.3, the
wrapper function invoked the kernel system call of the same name.
Since glibc 2.3, the wrapper function invokes
in order to terminate all of the threads in a process.
This page is part of release 3.74 of the Linux
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
- RETURN VALUE
- CONFORMING TO
- SEE ALSO