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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)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | SEE ALSO

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