Return to brk.2 CVS log

Up to [Research Unix] / researchv10dc / man / adm / man2

Annotation of researchv10dc/man/adm/man2/brk.2, revision 1.1

1.1     ! root        1: .TH BRK 2
        !             2: .CT 2 mem_man
        !             3: .SH NAME
        !             4: brk, sbrk \(mi change core allocation
        !             5: .SH SYNOPSIS
        !             6: .nf
        !             7: .B int brk(addr)
        !             8: .B char *addr;
        !             9: .PP
        !            10: .B char *sbrk(incr)
        !            11: .fi
        !            12: .SH DESCRIPTION
        !            13: .I Brk
        !            14: sets the system's idea of the lowest location not used by the program
        !            15: (called the break)
        !            16: to
        !            17: .I addr
        !            18: rounded up to the next multiple of 1024 bytes.
        !            19: Locations not less than
        !            20: .I addr
        !            21: and below the stack pointer
        !            22: may cause a memory violation if accessed.
        !            23: .PP
        !            24: In the alternate function
        !            25: .I sbrk,
        !            26: .I incr
        !            27: more bytes are added to the
        !            28: program's data space and a pointer to the
        !            29: start of the new area is returned.
        !            30: Rounding occurs as with
        !            31: .I brk,
        !            32: but a nominal break is remembered, so rounding does not accumulate.
        !            33: .PP
        !            34: When a program begins execution via
        !            35: .I exec
        !            36: the break is set at the
        !            37: highest location defined by the program
        !            38: and data storage areas.
        !            39: Ordinarily, therefore, only programs with growing
        !            40: data areas need to use
        !            41: .IR brk .
        !            42: .PP
        !            43: The error return from
        !            44: .I sbrk
        !            45: is
        !            46: .BR "(char *)-1" .
        !            47: .SH "SEE ALSO"
        !            48: .IR exec (2),
        !            49: .IR end (3),
        !            50: .IR malloc (3)
        !            51: .SH DIAGNOSTICS
        !            52: .B ENOMEM

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.