stdio: fix %N.Ms miscalculating spacing if M > strlen(arg)

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.15)
-project(FxLibc VERSION 1.4.5 LANGUAGES C ASM)
+project(FxLibc VERSION 1.5.0 LANGUAGES C ASM)
 
 set(CMAKE_INSTALL_MESSAGE LAZY)
 
@@ -190,8 +190,6 @@ set(SOURCES
   src/stdlib/strtoll.c
   src/stdlib/strtoul.c
   src/stdlib/strtoull.c
-  # unistd
-  src/unistd/_exit.c
   # string
   src/string/memchr.c
   src/string/memcmp.c

include/unistd.h

@@ -45,10 +45,6 @@ extern char *getcwd(char *__buf, size_t __size);
 
 extern int chdir(char const *__path);
 
-/* Exit immediately, bypassing exit handlers or signal handlers. */
-__attribute__((noreturn))
-extern void _exit(int __status);
-
 
 /* Kernel-style functions supported only by Vhex. */
 

src/stdio/printf/format_usual.c

@@ -59,6 +59,8 @@ void __printf_format_s(
 	size_t len = 0;
 	uint32_t precision = opt->precision ? opt->precision : (-1);
 	while(s[len] && len < precision) len++;
+	/* Cap precision to real value for __printf_compute_geometry() */
+	opt->precision = len;
 
 	struct __printf_geometry g = {
 		.prefix = 0, .sign = 0, .content = len,

src/unistd/_exit.c

@@ -1,10 +0,0 @@
-#include <unistd.h>
-
-/* Exit immediately, bypassing exit handlers or signal handlers. */
-extern void _Exit(int status);
-
-/* Alias to _Exit. */
-void _exit(int status)
-{
-    _Exit(status);
-};