sstk

SSTK(2)				 BSD planned			      SSTK(2)



NAME
       sstk - change stack size

SYNOPSIS
       caddr_t sstk(int incr);

DESCRIPTION
       (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. The call

	    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  automati-
       cally extended as needed. On the VAX the text and data areas are adja-
       cent in the P0 region, while the stack section is in  the  P1  region,
       and grows downward.

NOTE
       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.

SEE ALSO
       sbrk(2)



				  2003-11-11			      SSTK(2)