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Greatly expand system() shell code features

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The cosmopolitan command interpreter now has 13 builtin commands,
variable support, support for ; / && / || syntax, asynchronous support,
and plenty of unit tests with bug fixes.

This change fixes a bug in posix_spawn() with null envp arg. strace
logging now uses atomic writes for scatter functions. Breaking change
renaming GetCpuCount() to _getcpucount(). TurfWar is now updated to use
the new token bucket algorithm. WIN32 affinity masks now inherit across
fork() and execve().
This commit is contained in:
Justine Tunney 2022-10-11 21:06:27 -07:00
parent e7329b7cba
commit b41f91c658
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GPG key ID: BE714B4575D6E328
80 changed files with 1370 additions and 344 deletions
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10
libc/stdio/system.c
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@ -33,14 +33,8 @@
/**
* Launches program with system command interpreter.
*
* This embeds the cocmd.com shell interpreter which supports a limited
* subset of the bourne shell that's significantly faster:
*
* - pipelines
* - single quotes
* - double quotes
* - input redirection, e.g. `<path`
* - output redirection, e.g. `>path`, `>>append`, `2>err.txt, `2>&1`
* This embeds the Cosmopolitan Command Interpreter which provides
* Bourne-like syntax on all platforms including Windows.
*
* @param cmdline is an interpreted Turing-complete command
* @return -1 if child process couldn't be created, otherwise a wait