git: 9front

ref: 72a8af8a0d1405295f0901d30bee3b95ff239dd2
dir: /sys/src/libstdio/vsnprintf.c/

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/*
 * pANS stdio -- vsnprintf
 */
#include "iolib.h"
int vsnprintf(char *buf, int nbuf, const char *fmt, va_list args){
	int n;
	FILE *f=sopenw();
	if(f==NULL)
		return 0;
	setvbuf(f, buf, _IOFBF, nbuf);
	n=vfprintf(f, fmt, args);
	sclose(f);
	return n;
}