Return to env CVS log

Up to [Plan 9 NeXT] / lucent / sys / man / 3

Annotation of lucent/sys/man/3/env, revision 1.1

1.1     ! root        1: .TH ENV 3
        !             2: .SH NAME
        !             3: env \- environment variables
        !             4: .SH SYNOPSIS
        !             5: .nf
        !             6: .B bind #e /env
        !             7: 
        !             8: .BI /env/ var1
        !             9: .BI /env/ var2
        !            10:  ...
        !            11: .fi
        !            12: .SH DESCRIPTION
        !            13: The
        !            14: .I env
        !            15: device serves a one-level directory containing files with arbitrary names
        !            16: and contents.
        !            17: The intention is that the file name is the name of an
        !            18: .I environment variable
        !            19: (see
        !            20: .IR rc (1)),
        !            21: and the content is the variable's current value.
        !            22: .PP
        !            23: When a
        !            24: .IR fork (2)
        !            25: system call creates a new process, both the parent and the
        !            26: child continue to see exactly the same files in the
        !            27: .I env
        !            28: device: changes made in either process can be noticed by the other.
        !            29: In contrast, an
        !            30: .B rfork
        !            31: system call with the
        !            32: .B RFENVG
        !            33: bit set (see
        !            34: .IR fork (2))
        !            35: causes a split: initially both process groups see the
        !            36: same environment files, but any changes made in one process group
        !            37: cannot be noticed by the other.
        !            38: An
        !            39: .B rfork
        !            40: with
        !            41: .B RFCENVG
        !            42: splits and then clears the environment.
        !            43: .SH SEE ALSO
        !            44: .IR rc (1),
        !            45: .IR fork (2)
        !            46: .SH SOURCE
        !            47: .B /sys/src/9/port/devenv.c
        !            48: .SH BUGS
        !            49: A write starting at an offset after the current extent of a file
        !            50: yields an error instead of zero filling.

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