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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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25
libc/runtime/fork.c
View file

@ -21,6 +21,7 @@
#include "libc/calls/struct/sigset.internal.h"
#include "libc/calls/syscall-nt.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/calls/syscall_support-sysv.internal.h"
#include "libc/dce.h"
#include "libc/intrin/strace.internal.h"
#include "libc/nt/process.h"
@ -28,15 +29,7 @@
#include "libc/sysv/consts/sig.h"
#include "libc/thread/tls.h"
/**
* Creates new process.
*
* @return 0 to child, child pid to parent, or -1 w/ errno
* @raise EAGAIN if `RLIMIT_NPROC` was exceeded or system lacked resources
* @raise ENOMEM if we require more vespene gas
* @asyncsignalsafe
*/
int fork(void) {
int _fork(uint32_t dwCreationFlags) {
axdx_t ad;
sigset_t old, all;
int ax, dx, parent;
@ -52,7 +45,7 @@ int fork(void) {
ax &= dx - 1;
}
} else {
ax = sys_fork_nt();
ax = sys_fork_nt(dwCreationFlags);
}
if (!ax) {
if (!IsWindows()) {
@ -73,3 +66,15 @@ int fork(void) {
}
return ax;
}
/**
* Creates new process.
*
* @return 0 to child, child pid to parent, or -1 w/ errno
* @raise EAGAIN if `RLIMIT_NPROC` was exceeded or system lacked resources
* @raise ENOMEM if we require more vespene gas
* @asyncsignalsafe
*/
int fork(void) {
return _fork(0);
}