ref: b51b623725ce394a1f9f12686f043c1cc3bba7c9
dir: /sys/src/ape/lib/fmt/werrstr.c/
#include <stdarg.h>
#include <errno.h>
#include "fmt.h"
extern char *_plan9err;
void
werrstr(const char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
snprint(_plan9err, 128, fmt, arg);
va_end(arg);
errno = EPLAN9;
}