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+'\" t
+.\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl)
+.\"
+.\" SPDX-License-Identifier: GPL-2.0-or-later
+.\"
+.TH cfree 3 2024-05-02 "Linux man-pages (unreleased)"
+.SH NAME
+cfree \- free allocated memory
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.P
+.B "#include <stdlib.h>"
+.P
+/* In SunOS 4 */
+.BI "int cfree(void *" ptr );
+.P
+/* In glibc or FreeBSD libcompat */
+.BI "void cfree(void *" ptr );
+.P
+/* In SCO OpenServer */
+.BI "void cfree(char " ptr [. size " * ." num "], unsigned int " num ", \
+unsigned int " size );
+.P
+/* In Solaris watchmalloc.so.1 */
+.BI "void cfree(void " ptr [. elsize " * ." nelem "], size_t " nelem ", \
+size_t " elsize );
+.fi
+.P
+.RS -4
+Feature Test Macro Requirements for glibc (see
+.BR feature_test_macros (7)):
+.RE
+.P
+.BR cfree ():
+.nf
+    Since glibc 2.19:
+        _DEFAULT_SOURCE
+    glibc 2.19 and earlier:
+        _BSD_SOURCE || _SVID_SOURCE
+.fi
+.SH DESCRIPTION
+This function should never be used.
+Use
+.BR free (3)
+instead.
+Starting with glibc 2.26, it has been removed from glibc.
+.SS 1-arg cfree
+In glibc, the function
+.BR cfree ()
+is a synonym for
+.BR free (3),
+"added for compatibility with SunOS".
+.P
+Other systems have other functions with this name.
+The declaration is sometimes in
+.I <stdlib.h>
+and sometimes in
+.IR <malloc.h> .
+.SS 3-arg cfree
+Some SCO and Solaris versions have malloc libraries with a 3-argument
+.BR cfree (),
+apparently as an analog to
+.BR calloc (3).
+.P
+If you need it while porting something, add
+.P
+.in +4n
+.EX
+#define cfree(p, n, s) free((p))
+.EE
+.in
+.P
+to your file.
+.P
+A frequently asked question is "Can I use
+.BR free (3)
+to free memory allocated with
+.BR calloc (3),
+or do I need
+.BR cfree ()?"
+Answer: use
+.BR free (3).
+.P
+An SCO manual writes: "The cfree routine is provided for compliance
+to the iBCSe2 standard and simply calls free.
+The num and size
+arguments to cfree are not used."
+.SH RETURN VALUE
+The SunOS version of
+.BR cfree ()
+(which is a synonym for
+.BR free (3))
+returns 1 on success and 0 on failure.
+In case of error,
+.I errno
+is set to
+.BR EINVAL :
+the value of
+.I ptr
+was not a pointer to a block previously allocated by
+one of the routines in the
+.BR malloc (3)
+family.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.na
+.nh
+.BR cfree ()
+T}	Thread safety	MT-Safe /* In glibc */
+.TE
+.SH VERSIONS
+The 3-argument version of
+.BR cfree ()
+as used by SCO conforms to the iBCSe2 standard:
+Intel386 Binary Compatibility Specification, Edition 2.
+.SH STANDARDS
+None.
+.SH HISTORY
+.\" commit 025b33ae84bb8f15b2748a1d8605dca453fce112
+Removed in glibc 2.26.
+.SH SEE ALSO
+.BR malloc (3)