ref: 2e6f158f4dc9ebc6eb826041254221cba57c4019
dir: /sys/src/libdraw/newwindow.c/
#include <u.h> #include <libc.h> #include <draw.h> /* Connect us to new window, if possible */ int newwindow(char *str) { int fd; char *wsys; char buf[256]; wsys = getenv("wsys"); if(wsys == nil) return -1; fd = open(wsys, ORDWR); if(fd < 0){ free(wsys); return -1; } rfork(RFNAMEG); unmount(wsys, "/dev"); /* drop reference to old window */ free(wsys); if(str) snprint(buf, sizeof buf, "new %s", str); else strcpy(buf, "new"); if(mount(fd, -1, "/mnt/wsys", MREPL, buf) == -1){ if(mount(fd, -1, "/dev", MBEFORE, buf) == -1){ close(fd); return -1; } } else { if(bind("/mnt/wsys", "/dev", MBEFORE) == -1) return -1; } return 0; }