Provided by: manpages-dev_2.17-1_all
sstk - change stack size
caddr_t sstk(int incr);
(From the 4.3BSD Architecture Manual)
Each process begins execution with three logical areas of memories
called text, data and stack. The text area is read-only and shared,
while the data and stack areas are private to the process. Both the
data and stack areas may be extended and contracted on program request.
caddr_t addr = sbrk(incr);
changes the size of the data area by incr bytes and returns the new end
of the data area, while
caddr_t addr = sstk(incr);
changes the size of the stack area. The stack area is also
automatically extended as needed. On the VAX the text and data areas
are adjacent in the P0 region, while the stack section is in the P1
region, and grows downward.
This call is not supported in 4.3BSD or 4.4BSD or glibc or Linux or any
other known Unix-like system. Some systems have a routine of this name
that returns ENOSYS.