Make improvements

- Polyfill pselect() on Windows
- Add -O NOFILE flag to pledge.com
- Polyfill ppoll() on NetBSD, XNU, and Windows
- Support negative numbers and errno in sizetol()
- Add .RSS, .NOFILE, and .MAXCORE to Landlock Make
- Fix issue with .PLEDGE preventing touching of output files
- Add __watch() function (like ftrace) for logging memory changes

libc/fmt/sizetol.c

@@ -19,6 +19,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
+#include "libc/sysv/errfuns.h"
 
 static int GetExponent(int c) {
   switch (c) {
@@ -65,27 +66,41 @@ static int GetExponent(int c) {
  * characters after it (e.g. kbit, Mibit, TiB) are ignored. Spaces
  * before the integer are ignored, and overflows will be detected.
  *
+ * Negative numbers are permissible, as well as a leading `+` sign. To
+ * tell the difference between an error return and `-1` you must clear
+ * `errno` before calling and test whether it changed.
+ *
  * @param s is non-null nul-terminated input string
  * @param b is multiplier which should be 1000 or 1024
  * @return size greater than or equal 0 or -1 on error
+ * @error EINVAL if error is due to bad syntax
+ * @error EOVERFLOW if error is due to overflow
  */
 long sizetol(const char *s, long b) {
   long x;
-  int c, e;
+  int c, e, d;
   do {
     c = *s++;
   } while (c == ' ' || c == '\t');
-  if (!isdigit(c)) return -1;
+  d = c == '-' ? -1 : 1;
+  if (c == '-' || c == '+') c = *s++;
+  if (!isdigit(c)) {
+    return einval();
+  }
   x = 0;
   do {
     if (__builtin_mul_overflow(x, 10, &x) ||
-        __builtin_add_overflow(x, c - '0', &x)) {
-      return -1;
+        __builtin_add_overflow(x, (c - '0') * d, &x)) {
+      return eoverflow();
     }
   } while (isdigit((c = *s++)));
-  if ((e = GetExponent(c)) == -1) return -1;
+  if ((e = GetExponent(c)) == -1) {
+    return einval();
+  }
   while (e--) {
-    if (__builtin_mul_overflow(x, b, &x)) return -1;
+    if (__builtin_mul_overflow(x, b, &x)) {
+      return eoverflow();
+    }
   }
   return x;
 }

libc/fmt/strerror_r.c

@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/nt/runtime.h"
 #include "libc/str/str.h"