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## Re: Arithmetic expansion with increments and output redirection

**From**: |
Chet Ramey |

**Subject**: |
Re: Arithmetic expansion with increments and output redirection |

**Date**: |
Wed, 24 Apr 2019 09:11:12 -0400 |

**User-agent**: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |

On 4/23/19 5:49 PM, Ian Neal wrote:
>* Bash Version: 4.2*
>* Patch Level: 46*
>* Release Status: release*
>* *
>* Description:*
>* When using arithmetic expansion with variable pre- and*
>* post-increments/decrements in the output redirection file path,*
>* specifically on external executables (not builtins or functions), the state*
>* of the variable being incremented/decremented is not persisted in the*
>* environment.*
The redirection is expanded in the environment of the command. In the
second case, that means the child process forked to run /bin/true.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU address@hidden http://tiswww.cwru.edu/~chet/

**Re: Arithmetic expansion with increments and output redirection**, *(continued)*
**Re: Arithmetic expansion with increments and output redirection**, *Andreas Schwab*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Chet Ramey*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Chet Ramey*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Ian Neal*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Chet Ramey*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Ilkka Virta*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Chet Ramey*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Greg Wooledge*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Ian Neal*, `2019/04/24`
**Re: Arithmetic expansion with increments and output redirection**, *Chet Ramey*, `2019/04/24`

**Re: Arithmetic expansion with increments and output redirection**,
*Chet Ramey* **<=**