ref: 8dfdc38f952b708732e605641bd9cc64b126cbdc
dir: /sys/src/libc/9sys/writev.c/
#include <u.h> #include <libc.h> static long iowritev(int fd, IOchunk *io, int nio, vlong offset) { int i; long tot; char *buf, *p; tot = 0; for(i=0; i<nio; i++) tot += io[i].len; buf = malloc(tot); if(buf == nil) return -1; p = buf; for(i=0; i<nio; i++){ memmove(p, io->addr, io->len); p += io->len; io++; } tot = pwrite(fd, buf, tot, offset); free(buf); return tot; } long writev(int fd, IOchunk *io, int nio) { return iowritev(fd, io, nio, -1LL); } long pwritev(int fd, IOchunk *io, int nio, vlong off) { return iowritev(fd, io, nio, off); }