ref: 1018d7a7091fd5e0433f501a3474cdc3fec322cc
dir: /appl/cmd/time.b/
implement Time; include "sys.m"; include "draw.m"; include "sh.m"; FD: import Sys; Context: import Draw; Time: module { init: fn(ctxt: ref Context, argv: list of string); }; sys: Sys; stderr, waitfd: ref FD; init(ctxt: ref Context, argv: list of string) { sys = load Sys Sys->PATH; stderr = sys->fildes(2); waitfd = sys->open("#p/"+string sys->pctl(0, nil)+"/wait", sys->OREAD); if(waitfd == nil){ sys->fprint(stderr, "time: open wait: %r\n"); return; } argv = tl argv; if(argv == nil) { sys->fprint(stderr, "usage: time cmd ...\n"); return; } file := hd argv; if(len file<4 || file[len file-4:]!=".dis") file += ".dis"; t0 := sys->millisec(); c := load Command file; if(c == nil) { err := sys->sprint("%r"); if(1){ c = load Command "/dis/"+file; if(c == nil) err = sys->sprint("%r"); } if(c == nil) { sys->fprint(stderr, "time: %s: %s\n", hd argv, err); return; } } t1 := sys->millisec(); pidc := chan of int; spawn cmd(ctxt, c, pidc, argv); waitfor(<-pidc); t2 := sys->millisec(); f1 := real (t1 - t0) /1000.; f2 := real (t2 - t1) /1000.; sys->fprint(stderr, "%.4gl %.4gr %.4gt\n", f1, f2, f1+f2); } cmd(ctxt: ref Context, c: Command, pidc: chan of int, argv: list of string) { pidc <-= sys->pctl(0, nil); c->init(ctxt, argv); } waitfor(pid: int) { buf := array[sys->WAITLEN] of byte; status := ""; for(;;){ n := sys->read(waitfd, buf, len buf); if(n < 0) { sys->fprint(stderr, "sh: read wait: %r\n"); return; } status = string buf[0:n]; if(status[len status-1] != ':') sys->fprint(stderr, "%s\n", status); who := int status; if(who != 0) { if(who == pid) return; } } }