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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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9
libc/mem/setenv.c
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@ -16,27 +16,32 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/safemacros.internal.h"
#include "libc/intrin/strace.internal.h"
#include "libc/mem/internal.h"
#include "libc/mem/mem.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/errfuns.h"
/**
* Copies variable to environment.
*
* @return 0 on success, or -1 w/ errno
* @raise EINVAL if `name` is empty or contains `'='`
* @raise ENOMEM if we require more vespene gas
* @see putenv(), getenv()
*/
int setenv(const char *name, const char *value, int overwrite) {
int rc;
char *s;
size_t namelen, valuelen;
if (isempty(name) || strchr(name, '=')) return einval();
namelen = strlen(name);
valuelen = strlen(value);
s = malloc(namelen + valuelen + 2);
if (!(s = malloc(namelen + valuelen + 2))) return -1;
memcpy(mempcpy(mempcpy(s, name, namelen), "=", 1), value, valuelen + 1);
rc = PutEnvImpl(s, overwrite);
STRACE("setenv(%#s, %#s, %d) → %d", name, value, overwrite, rc);
STRACE("setenv(%#s, %#s, %d) → %d% m", name, value, overwrite, rc);
return rc;
}