ref: 37cbd6b632c56f09c0c561cddc1c4e5645dd4269
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; }