exit.3p (3461B)
- '\" et
- .TH EXIT "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
- .\"
- .SH 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.
- .\"
- .SH NAME
- exit
- \(em terminate a process
- .SH SYNOPSIS
- .LP
- .nf
- #include <stdlib.h>
- .P
- void exit(int \fIstatus\fP);
- .fi
- .SH DESCRIPTION
- The functionality described on this reference page is aligned with the
- ISO\ C standard. Any conflict between the requirements described here and the
- ISO\ C standard is unintentional. This volume of POSIX.1\(hy2017 defers to the ISO\ C standard.
- .P
- The value of
- .IR status
- may be 0, EXIT_SUCCESS, EXIT_FAILURE,
- or any other value, though only the least significant 8 bits (that is,
- .IR status
- & 0377) shall be available from
- \fIwait\fR()
- and
- \fIwaitpid\fR();
- the full value shall be available from
- \fIwaitid\fR()
- and in the
- .BR siginfo_t
- passed to a signal handler for SIGCHLD.
- .P
- The
- \fIexit\fR()
- function shall first call all functions registered by
- \fIatexit\fR(),
- in the reverse order of their registration, except that a function is
- called after any previously registered functions that had already been
- called at the time it was registered. Each function is called as many
- times as it was registered. If, during the call to any such function, a
- call to the
- \fIlongjmp\fR()
- function is made that would terminate the call to the registered
- function, the behavior is undefined.
- .P
- If a function registered by a call to
- \fIatexit\fR()
- fails to return, the remaining registered functions shall not be called
- and the rest of the
- \fIexit\fR()
- processing shall not be completed. If
- \fIexit\fR()
- is called more than once, the behavior is undefined.
- .P
- The
- \fIexit\fR()
- function shall then flush all open streams with unwritten buffered data
- and close all open streams. Finally, the process shall be terminated
- with the same consequences as described in
- .IR "Consequences of Process Termination".
- .SH "RETURN VALUE"
- The
- \fIexit\fR()
- function does not return.
- .SH ERRORS
- No errors are defined.
- .LP
- .IR "The following sections are informative."
- .SH EXAMPLES
- None.
- .SH "APPLICATION USAGE"
- None.
- .SH RATIONALE
- See
- \fI_Exit\fR().
- .SH "FUTURE DIRECTIONS"
- None.
- .SH "SEE ALSO"
- .IR "\fI_Exit\fR\^(\|)",
- .IR "\fIatexit\fR\^(\|)",
- .IR "\fIexec\fR\^",
- .IR "\fIlongjmp\fR\^(\|)",
- .IR "\fItmpfile\fR\^(\|)",
- .IR "\fIwait\fR\^(\|)",
- .IR "\fIwaitid\fR\^(\|)"
- .P
- The Base Definitions volume of POSIX.1\(hy2017,
- .IR "\fB<stdlib.h>\fP"
- .\"
- .SH COPYRIGHT
- Portions of this text are reprinted and reproduced in electronic form
- from IEEE Std 1003.1-2017, Standard for Information Technology
- -- Portable Operating System Interface (POSIX), The Open Group Base
- Specifications Issue 7, 2018 Edition,
- Copyright (C) 2018 by the Institute of
- Electrical and Electronics Engineers, Inc and The Open Group.
- In the event of any discrepancy between this version and the original IEEE and
- The Open Group Standard, the original IEEE and The Open Group Standard
- is the referee document. The original Standard can be obtained online at
- http://www.opengroup.org/unix/online.html .
- .PP
- Any typographical or formatting errors that appear
- in this page are most likely
- to have been introduced during the conversion of the source files to
- man page format. To report such errors, see
- https://www.kernel.org/doc/man-pages/reporting_bugs.html .