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+'\" et
+.TH FREE "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
+free
+\(em free allocated memory
+.SH SYNOPSIS
+.LP
+.nf
+#include <stdlib.h>
+.P
+void free(void *\fIptr\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
+\fIfree\fR()
+function shall cause the space pointed to by
+.IR ptr
+to be deallocated; that is, made available for further allocation. If
+.IR ptr
+is a null pointer, no action shall occur. Otherwise, if the argument
+does not match a pointer earlier returned by a function in POSIX.1\(hy2008 that
+allocates memory as if by
+\fImalloc\fR(),
+or if the space has been deallocated by a call to
+\fIfree\fR()
+or
+\fIrealloc\fR(),
+the behavior is undefined.
+.P
+Any use of a pointer that refers to freed space results in undefined
+behavior.
+.SH "RETURN VALUE"
+The
+\fIfree\fR()
+function shall not return a value.
+.SH ERRORS
+No errors are defined.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+There is now no requirement for the implementation to support the
+inclusion of
+.IR <malloc.h> .
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIcalloc\fR\^(\|)",
+.IR "\fImalloc\fR\^(\|)",
+.IR "\fIposix_memalign\fR\^(\|)",
+.IR "\fIrealloc\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 .