ref: 313e4bf78ea365ad29ef9c42b359b7994c566b6d
dir: /acme/bin/source/mkwnew.c/
#include <u.h> #include <libc.h> void main(int argc, char *argv[]) { int i, fd, pid, n; char wdir[256]; int dflag; dflag = 0; ARGBEGIN{ case 'd': dflag = 1; break; default: fprint(2, "usage: wnew [-d] [label]\n"); }ARGEND pid = getpid(); wdir[0] = '\0'; if(!dflag) getwd(wdir, sizeof wdir); if(argc>0) for(i=0; i<argc; i++) snprint(wdir, sizeof wdir, "%s%c%s", wdir, i==0? '/' : '-', argv[i]); else snprint(wdir, sizeof wdir, "%s/-win", wdir); if((fd = open("/dev/wnew", ORDWR)) < 0) sysfatal("wnew: can't open /dev/wnew: %r"); if(fprint(fd, "%d %s", pid, wdir+dflag) < 0) sysfatal("wnew: can't create window: %r"); if(seek(fd, 0, 0) != 0) sysfatal("wnew: can't seek: %r"); if((n=read(fd, wdir, sizeof wdir-1)) < 0) sysfatal("wnew: can't read window id: %r"); wdir[n] = '\0'; print("%s\n", wdir); exits(nil); }