ref: c85dc2c7a75a78c497c55ce5ad276f8f9fa04e17
dir: /base/ns.c/
static int parsemntflags(lua_State *L, char *s) { int flags, n; char *f[4], buf[128]; flags = MREPL; n = getfields(s, f, sizeof f, 1, " \t\r\n"); if(n > 0) for(int i = 0; i < n; i++){ if (strcmp(f[i], "after") == 0) flags |= MAFTER; else if(strcmp(f[i], "before") == 0) flags |= MBEFORE; else if(strcmp(f[i], "create") == 0) flags |= MCREATE; else if(strcmp(f[i], "cache") == 0) flags |= MCACHE; else{ snprint(buf, sizeof buf, "skipping unknown mount flag '%s'", f[i]); lua_warning(L, buf, 0); } } return flags; } static int p9_bind(lua_State *L) { const char *this, *over; int flags, r; this = luaL_checkstring(L, 1); over = luaL_checkstring(L, 2); flags = parsemntflags(L, luaL_optstring(L, 3, "")); if((r = bind(this, over, flags)) == -1) return error(L, "bind: %r"); lua_pushinteger(L, r); return 1; } static int p9_mount(lua_State *L) { const char *over, *aname; int fd, afd, closefd, flags, r; closefd = -1; switch(lua_type(L, 1)){ default: return luaL_typeerror(L, 1, "file descriptor or path"); case LUA_TNUMBER: fd = lua_tointeger(L, 1); break; case LUA_TSTRING: if((fd = open(lua_tostring(L, 1), ORDWR)) == -1) return error(L, "open: %r"); closefd = fd; break; } over = luaL_checkstring(L, 2); flags = parsemntflags(L, luaL_optstring(L, 3, "")); aname = luaL_optstring(L, 4, ""); afd = luaL_optinteger(L, 5, -1); if((r = mount(fd, afd, over, flags, aname)) == -1){ close(closefd); return error(L, "mount: %r"); } close(closefd); lua_pushinteger(L, r); return 1; } static int p9_unmount(lua_State *L) { const char *name, *over; int r; name = luaL_checkstring(L, 1); over = luaL_optstring(L, 2, nil); if(over == nil){ over = name; name = nil; } if((r = unmount(name, over)) == -1) return error(L, "unmount: %r"); lua_pushinteger(L, r); return 1; }