BREAK(II) 8/5/73 BREAK(II) NAME break - set program break SYNOPSIS (break = 17.) sys break; addr char *sbrk(incr) DESCRIPTION Break sets the system's idea of the lowest location not used by the program to addr (rounded up to the next multiple of 64 bytes). Locations not less than addr and below the stack pointer are not in the address space and will thus cause a memory violation if accessed. From C, the calling sequence is different; incr more bytes are added to the program's data space and a pointer to the start of the new area is returned. When a program begins execution via exec the break is set at the highest location defined by the program and data storage areas. Ordinarily, therefore, only programs with growing data areas need to use break. SEE ALSO exec(II) DIAGNOSTICS The c-bit is set if the program requests more memory than the system limit (currently 20K words), or if more than 8 segmentation registers would be required to implement the break. From C, -1 is returned for these errors.