git://sourceware.org / newlib-cygwin.git / blame
| Commit | Line | Data |
|---|---|---|
| a245bd6e CF |
1 | /* sem.cc: Single unix specification IPC interface for Cygwin. |
| 2 | ||
| a245bd6e CF |
3 | This file is part of Cygwin. |
| 4 | ||
| 5 | This software is a copyrighted work licensed under the terms of the | |
| 6 | Cygwin license. Please consult the file "CYGWIN_LICENSE" for | |
| 7 | details. */ | |
| 8 | ||
| 282113ba CV |
9 | #ifdef __OUTSIDE_CYGWIN__ |
| 10 | #include "woutsup.h" | |
| a245bd6e | 11 | |
| 282113ba CV |
12 | #include <errno.h> |
| 13 | #include <pthread.h> | |
| 14 | #include <stdio.h> | |
| 15 | #include <stdlib.h> | |
| 16 | #include <string.h> | |
| 17 | #include <time.h> | |
| a245bd6e | 18 | |
| 282113ba CV |
19 | #include "cygserver.h" |
| 20 | #include "process.h" | |
| 21 | #include "transport.h" | |
| a245bd6e | 22 | |
| 282113ba CV |
23 | #include "cygserver_ipc.h" |
| 24 | #include "cygserver_sem.h" | |
| a245bd6e | 25 | |
| 282113ba CV |
26 | client_request_sem::client_request_sem () |
| 27 | : client_request (CYGSERVER_REQUEST_SEM, | |
| 28 | &_parameters, sizeof (_parameters)) | |
| 29 | { | |
| a245bd6e CF |
30 | } |
| 31 | ||
| 282113ba CV |
32 | void |
| 33 | client_request_sem::serve (transport_layer_base *const conn, | |
| 34 | process_cache *const cache) | |
| a245bd6e | 35 | { |
| 282113ba CV |
36 | if (msglen () != sizeof (_parameters.in)) |
| 37 | { | |
| 38 | syscall_printf ("bad request body length: expecting %lu bytes, got %lu", | |
| 39 | sizeof (_parameters), msglen ()); | |
| 40 | error_code (EINVAL); | |
| 41 | msglen (0); | |
| 42 | return; | |
| 43 | } | |
| 44 | if (support_semaphores == TUN_FALSE) | |
| 45 | { | |
| 46 | syscall_printf ("Semaphore support not started"); | |
| 47 | error_code (ENOSYS); | |
| 48 | _parameters.out.ret = -1; | |
| 49 | msglen (sizeof (_parameters.out)); | |
| 50 | return; | |
| 51 | } | |
| 52 | process *const client = cache->process (_parameters.in.ipcblk.cygpid, | |
| 8d8f4036 | 53 | _parameters.in.ipcblk.winpid); |
| 282113ba CV |
54 | if (!client) |
| 55 | { | |
| 56 | error_code (EAGAIN); | |
| 57 | msglen (0); | |
| 58 | return; | |
| 59 | } | |
| 60 | if (!conn->impersonate_client ()) | |
| 61 | { | |
| 62 | client->release (); | |
| 63 | error_code (EACCES); | |
| 64 | msglen (0); | |
| 65 | return; | |
| 66 | } | |
| 67 | if (!adjust_identity_info (&_parameters.in.ipcblk)) | |
| 68 | { | |
| 69 | client->release (); | |
| 70 | conn->revert_to_self (); | |
| 71 | error_code (EACCES); | |
| 72 | msglen (0); | |
| 73 | return; | |
| 74 | } | |
| 75 | /* Early revert_to_self since IPC code runs in kernel mode. */ | |
| 76 | conn->revert_to_self (); | |
| 1f8b3049 CV |
77 | /* sysv_sem.cc takes care of itself. */ |
| 78 | client->release (); | |
| 8d8f4036 | 79 | thread td (client, &_parameters.in.ipcblk, true); |
| 282113ba CV |
80 | int res; |
| 81 | switch (_parameters.in.semop) | |
| 82 | { | |
| 83 | case SEMOP_semctl: | |
| 84 | res = semctl (&td, &_parameters.in.ctlargs); | |
| 85 | break; | |
| 86 | case SEMOP_semget: | |
| 87 | res = semget (&td, &_parameters.in.getargs); | |
| 88 | break; | |
| 89 | case SEMOP_semop: | |
| 90 | res = semop (&td, &_parameters.in.opargs); | |
| 91 | break; | |
| c026d842 CV |
92 | default: |
| 93 | res = ENOSYS; | |
| 94 | td.td_retval[0] = -1; | |
| 95 | break; | |
| 282113ba CV |
96 | } |
| 97 | /* Allocated by the call to adjust_identity_info(). */ | |
| 98 | if (_parameters.in.ipcblk.gidlist) | |
| 99 | free (_parameters.in.ipcblk.gidlist); | |
| 282113ba CV |
100 | error_code (res); |
| 101 | _parameters.out.ret = td.td_retval[0]; | |
| 102 | msglen (sizeof (_parameters.out)); | |
| a245bd6e | 103 | } |
| 282113ba | 104 | #endif /* __OUTSIDE_CYGWIN__ */ |