8 void vwarn(const char *fmt, va_list ap)  in vwarn()  argument
11 	if (fmt) {  in vwarn()
12 		vfprintf(stderr, fmt, ap);  in vwarn()
18 void vwarnx(const char *fmt, va_list ap)  in vwarnx()  argument
21 	if (fmt) vfprintf(stderr, fmt, ap);  in vwarnx()
25 _Noreturn void verr(int status, const char *fmt, va_list ap)  in verr()  argument
27 	vwarn(fmt, ap);  in verr()
31 _Noreturn void verrx(int status, const char *fmt, va_list ap)  in verrx()  argument
33 	vwarnx(fmt, ap);  in verrx()
37 void warn(const char *fmt, ...)  in warn()  argument
40 	va_start(ap, fmt);  in warn()
41 	vwarn(fmt, ap);  in warn()
45 void warnx(const char *fmt, ...)  in warnx()  argument
48 	va_start(ap, fmt);  in warnx()
49 	vwarnx(fmt, ap);  in warnx()
53 _Noreturn void err(int status, const char *fmt, ...)  in err()  argument
56 	va_start(ap, fmt);  in err()
57 	verr(status, fmt, ap);  in err()
61 _Noreturn void errx(int status, const char *fmt, ...)  in errx()  argument
64 	va_start(ap, fmt);  in errx()
65 	verrx(status, fmt, ap);  in errx()