ref: 6db18e8784b845cfda99b7f8dab8a158aec6a26f
dir: /sys/src/libstdio/vsprintf.c/
/* * pANS stdio -- vsprintf */ #include "iolib.h" int vsprintf(char *buf, const char *fmt, va_list args){ int n; FILE *f=sopenw(); if(f==NULL) return 0; setvbuf(f, buf, _IOFBF, 100000); n=vfprintf(f, fmt, args); sclose(f); return n; }