BRK (2)
change data segment size
SYNOPSIS
#include <unistd.h>
int brk(void * end_data_segment );
void *sbrk(ptrdiff_t increment );
DESCRIPTION
brk
sets the end of the data segment to the value specified by
end_data_segment .
end_datasegment
must be greater than end of the text segment and it must be 16kB before the
end of the stack.
sbrk
increments the program's data space by
increment
bytes.
sbrk
isn't a system call, it is just a C library wrapper.
RETURN VALUE
On success,
brk
returns zero, and
sbrk
returns a pointer to the start of the new area. On error, -1 is returned,
and
errno
is set to
ENOMEM .
CONFORMING TO
BSD 4.3
brk and sbrk
are not defined in the C Standard and are deliberately excluded from the
POSIX.1 standard (see paragraphs B.1.1.1.3 and B.8.3.3).
SEE ALSO
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