projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 A |
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; | |
| 5b2abdfb | 16 | static name_t LOOKUP_NAME = "lookup daemon v2"; |
| e9ce8d39 A |
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 |