On 12/27/20 12:38 PM, Saint Michael wrote:
Bash is very powerful for its ability to use all kinds of commands and pipe information through them. But there is a single thing that is impossible to achieve except using files on the hard drive or on /tmp. We need a new declare -g (global) where a variable would have its contents changed by subshells and keep it. I.e. all subshells may change the variable and this will not be lost when the subshell exits. Also, a native semaphore technology, so different code being executed in parallel would change the variable in an orderly fashion. I use GNU parallel extensively, basically, my entire business depends on this technology, and now I need to use a database to pass information between functions being executed, back to the main bash script. This is basically ridiculous. At some point we need to turn Bash into more than a shell, a power language. Now I do arbitrary math using embedded Python, but the variable-passing restriction is a big roadblock. Philip Orleans
Essentially, you want IPC. But, you do not want to use the filesystem as the communications channel for the IPC.
So, what do you propose instead, that isn't the filesystem? How do you think your proposed declare -g would work? (There is already declare -g, maybe you'd prefer declare --superglobal or something?)
-- Eli Schwartz Arch Linux Bug Wrangler and Trusted User
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