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The Lounge What is on Your Mind? Speculative Shell Feature Brainstorming Post 302514747 by Corona688 on Sunday 17th of April 2011 10:50:48 PM
Old 04-17-2011
Quote:
Originally Posted by tetsujin
Well, we're talking about using shared memory to export this copy of the shell variables to fork()'ed shell processes - so as long as the memory is shared writable, and as long as access to it is synchronized adequately, those shell processes would be able to propagate their variable changes back to the main shell...
When you make copies of the memory, the memory won't propagate back unless you propagate it yourself. Which opens an even bigger can of worms than just using the originals -- when and if to propagate back.
 

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platform::shell(3tcl)					       Tcl Bundled Packages					     platform::shell(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME
platform::shell - System identification support code and utilities SYNOPSIS
package require platform::shell ?1.1.4? platform::shell::generic shell platform::shell::identify shell platform::shell::platform shell _________________________________________________________________ DESCRIPTION
The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell. This package allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only requirement is that the other shell (identified by its path), is actually executable on the current machine. While for most platform this means that the architecture of the interrogated shell is identical to the architecture of the running shell this is not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run 32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers. For applications like a code repository it is important to identify the architecture of the shell which will actually run the installed packages, versus the architecture of the shell running the repository software. COMMANDS
platform::shell::identify shell This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell. platform::shell::generic shell This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell. platform::shell::platform shell This command returns the contents of tcl_platform(platform) for the specified Tcl shell. KEYWORDS
operating system, cpu architecture, platform, architecture platform::shell 1.1.4 platform::shell(3tcl)
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