| | 1 | /* |
| | 2 | * Port and memory management for doing lookups to the lookup server |
| | 3 | * Copyright (C) 1989 by NeXT, Inc. |
| | 4 | */ |
| | 5 | /* |
| | 6 | * HISTORY |
| | 7 | * 27-Mar-90 Gregg Kellogg (gk) at NeXT |
| | 8 | * Changed to use bootstrap port instead of service port. |
| | 9 | * |
| | 10 | */ |
| | 11 | #include <stdio.h> |
| | 12 | #include <mach/mach.h> |
| | 13 | #include <servers/bootstrap.h> |
| | 14 | |
| | 15 | mach_port_t _lu_port = MACH_PORT_NULL; |
| | 16 | static name_t LOOKUP_NAME = "lookup daemon v2"; |
| | 17 | |
| | 18 | mach_port_t _lookupd_port(mach_port_t port) { |
| | 19 | if (port != MACH_PORT_NULL) { |
| | 20 | kern_return_t ret; |
| | 21 | mach_port_t bp; |
| | 22 | ret = task_get_bootstrap_port(mach_task_self(), &bp); |
| | 23 | if (ret != KERN_SUCCESS) { |
| | 24 | mach_error("task_get_bootstrap_port() failed", ret); |
| | 25 | abort(); |
| | 26 | } |
| | 27 | if (bp == MACH_PORT_NULL) { |
| | 28 | mach_error("task_get_bootstrap_port() returned MACH_PORT_NULL!", 0); |
| | 29 | return MACH_PORT_NULL; |
| | 30 | } |
| | 31 | ret = bootstrap_register(bp, LOOKUP_NAME, port); |
| | 32 | if (ret != BOOTSTRAP_SUCCESS) { |
| | 33 | mach_error("bootstrap_register() failed", ret); |
| | 34 | abort(); |
| | 35 | } |
| | 36 | return port; |
| | 37 | } |
| | 38 | return _lu_port; |
| | 39 | } |
| | 40 | |
| | 41 | /* called as child starts up. mach ports aren't inherited: trash cache */ |
| | 42 | void |
| | 43 | _lu_fork_child() |
| | 44 | { |
| | 45 | mach_port_t bp; |
| | 46 | kern_return_t ret; |
| | 47 | int pid = getpid(); |
| | 48 | |
| | 49 | _lu_port = MACH_PORT_NULL; |
| | 50 | if (pid > 2) { |
| | 51 | ret = task_get_bootstrap_port(mach_task_self(), &bp); |
| | 52 | if (ret != KERN_SUCCESS) { |
| | 53 | mach_error("task_get_bootstrap_port() failed", ret); |
| | 54 | abort(); |
| | 55 | } |
| | 56 | if (bp == MACH_PORT_NULL) { |
| | 57 | fprintf(stderr, "task_get_bootstrap_port() returned MACH_PORT_NULL!\n"); |
| | 58 | return; |
| | 59 | } |
| | 60 | ret = bootstrap_look_up(bp, LOOKUP_NAME, &_lu_port); |
| | 61 | if (ret != BOOTSTRAP_SUCCESS && ret != BOOTSTRAP_UNKNOWN_SERVICE) { |
| | 62 | mach_error("bootstrap_look_up() failed", ret); |
| | 63 | _lu_port = MACH_PORT_NULL; |
| | 64 | } |
| | 65 | } |
| | 66 | } |
| | 67 | |
| | 68 | void |
| | 69 | _lu_setport(mach_port_t desired) |
| | 70 | { |
| | 71 | if (_lu_port != MACH_PORT_NULL) { |
| | 72 | mach_port_deallocate(mach_task_self(), _lu_port); |
| | 73 | } |
| | 74 | _lu_port = desired; |
| | 75 | } |
| | 76 | |
| | 77 | static int |
| | 78 | port_valid(mach_port_t port) |
| | 79 | { |
| | 80 | mach_port_type_t ptype; |
| | 81 | kern_return_t ret; |
| | 82 | |
| | 83 | ret = mach_port_type(mach_task_self(), port, &ptype); |
| | 84 | if (ret != KERN_SUCCESS) { |
| | 85 | mach_error("mach_port_type() failed", ret); |
| | 86 | return 0; |
| | 87 | } |
| | 88 | return 1; |
| | 89 | } |
| | 90 | |
| | 91 | int |
| | 92 | _lu_running(void) |
| | 93 | { |
| | 94 | if (_lu_port == MACH_PORT_NULL) { |
| | 95 | _lu_fork_child(); |
| | 96 | } |
| | 97 | if (_lu_port != MACH_PORT_NULL) { |
| | 98 | if (port_valid(_lu_port)) { |
| | 99 | return (1); |
| | 100 | } |
| | 101 | _lu_fork_child(); |
| | 102 | if (port_valid(_lu_port)) { |
| | 103 | return (1); |
| | 104 | } |
| | 105 | } |
| | 106 | return 0; |
| | 107 | } |
| | 108 | |
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