ref: 03852d94083a33e0b10762c2225f2015f23c49d5
dir: /sys/src/libstdio/vsnprintf.c/
/* * 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; }