Work with stdbuf environment variables
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Check `_STDBUF_O` and `_STDBUF_E` environment variables for setting up stdout and stderr. This makes Rust programs compatible with coreutils's (and `uutils`'s) `stdbuf` program. It incidentally also solves uutils/coreutils#7967. This lays ground work for solving rust-lang#60673 because it lets the user of a Rust program decide the default buffering, offering the opportunity to change the current default, letting stdout buffer blockwise if it's not connected to a terminal, because the user can now override the behavior using [`stdbuf`](https://linux.die.net/man/1/stdbuf) if it's needed.
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r? @ChrisDenton rustbot has assigned @ChrisDenton. Use |
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Based on #148274 because it makes some of the changes I need here, as well. |
Mark-Simulacrum
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Nominating for libs-api to decide whether we want to support this configuration interface. |
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Check
_STDBUF_Oand_STDBUF_Eenvironment variables for setting up stdout and stderr. This makes Rust programs compatible with coreutils's (anduutils's)stdbufprogram. It incidentally also solves uutils/coreutils#7967.This lays ground work for solving #60673 because it lets the user of a Rust program decide the default buffering, offering the opportunity to change the current default, letting stdout buffer blockwise if it's not connected to a terminal, because the user can now override the behavior using
stdbufif it's needed.