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free(3p) [centos man page]

FREE(3P)						     POSIX Programmer's Manual							  FREE(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       free - free allocated memory

SYNOPSIS

       #include <stdlib.h>

       void free(void *ptr);

DESCRIPTION

       The free() function shall cause the space pointed to by ptr to be deallocated; that is, made available for further allocation. If ptr is  a
       null  pointer,  no  action  shall  occur.   Otherwise, if the argument does not match a pointer earlier returned by the calloc(), malloc(),
       posix_memalign(),  realloc(), or   strdup()  function, or if the space has been deallocated by a call to free() or realloc(), the  behavior
       is undefined.

       Any use of a pointer that refers to freed space results in undefined behavior.

RETURN VALUE

       The free() function shall not return a value.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       There is now no requirement for the implementation to support the inclusion of <malloc.h>.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       calloc(), malloc(), realloc(), the Base Definitions volume of IEEE Std 1003.1-2001, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 .

IEEE
/The Open Group						       2003								  FREE(3P)

Check Out this Related Man Page

STRDUP(3P)						     POSIX Programmer's Manual							STRDUP(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       strdup - duplicate a string

SYNOPSIS

       #include <string.h>

       char *strdup(const char *s1);

DESCRIPTION

       The strdup() function shall return a pointer to a new string, which is a duplicate of the string pointed to by s1.   The  returned  pointer
       can be passed to free(). A null pointer is returned if the new string cannot be created.

RETURN VALUE

       The  strdup()  function shall return a pointer to a new string on success. Otherwise, it shall return a null pointer and set errno to indi-
       cate the error.

ERRORS

       The strdup() function may fail if:

       ENOMEM Storage space available is insufficient.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       free(), malloc(), the Base Definitions volume of IEEE Std 1003.1-2001, <string.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 .

IEEE
/The Open Group						       2003								STRDUP(3P)
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