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Embed cocmd.com interpreter for system() / open()

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This change lets you use system() in an easier and portable way. The
problem with the call in the past has always been that bourne and
cmd.com on Windows have less than nothing in common, so pretty much the
only command system() could be used for across platforms was maybe echo.
cmd.exe is also a security liability due to its escaping rules.

Since cocmd.com implements 85% of what we need from bourne, in a really
tiny way, it makes perfect sense to be embedded in these functionss. We
get a huge performance boost too.

Fixes #644
This commit is contained in:
Justine Tunney 2022-10-02 15:29:57 -07:00
parent daca5499b9
commit 950a1b310b
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GPG key ID: BE714B4575D6E328
9 changed files with 313 additions and 320 deletions
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9
libc/paths.h
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@ -1,17 +1,10 @@
#ifndef COSMOPOLITAN_LIBC_PATHS_H_
#define COSMOPOLITAN_LIBC_PATHS_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
extern const char *_PATH_BSHELL;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#define _PATH_DEFPATH "/usr/local/bin:/bin:/usr/bin"
#define _PATH_STDPATH "/bin:/usr/bin:/sbin:/usr/sbin"
#define _PATH_BSHELL _PATH_BSHELL
#define _PATH_BSHELL "/bin/sh"
#define _PATH_CONSOLE "/dev/console"
#define _PATH_DEVNULL "/dev/null"
#define _PATH_KLOG "/proc/kmsg"