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RedHat 9 (Linux i386) - man page for brk (redhat section 2)

BRK(2)				    Linux Programmer's Manual				   BRK(2)

NAME
       brk, sbrk - 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, when that
       value is reasonable, the system does have enough memory and the process	does  not  exceed
       its max data size (see setrlimit(2)).

       sbrk increments the program's data space by increment bytes.  sbrk isn't a system call, it
       is just a C library wrapper.  Calling sbrk with an increment of 0 can be used to find  the
       current location of the program break.

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
       execve(2), getrlimit(2), malloc(3)

Linux 0.99.11				    1993-07-21					   BRK(2)


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