| [1] | 1 | /* |
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| [23] | 2 | * sys_stat.c - Return statistics on a file or directory. |
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| [1] | 3 | * |
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| [23] | 4 | * Author Alain Greiner (2016,2017) |
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| [1] | 5 | * |
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| [23] | 6 | * Copyright (c) UPMC Sorbonne Universites |
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| [1] | 7 | * |
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| [23] | 8 | * This file is part of ALMOS-MKH. |
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| 9 | * |
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| [1] | 11 | * under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; version 2.0 of the License. |
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| 13 | * |
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| [23] | 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| [1] | 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| [23] | 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| [1] | 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |
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| [23] | 24 | #include <hal_types.h> |
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| 25 | #include <hal_uspace.h> |
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| 26 | #include <hal_special.h> |
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| [1] | 27 | #include <errno.h> |
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| 28 | #include <thread.h> |
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| [23] | 29 | #include <printk.h> |
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| [1] | 30 | #include <vfs.h> |
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| [23] | 31 | #include <vmm.h> |
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| 32 | #include <process.h> |
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| [1] | 33 | |
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| [23] | 34 | ////////////////////////////////////////// |
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| 35 | int sys_stat( uint32_t file_id, |
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| 36 | struct vfs_stat_s * stat ) |
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| [1] | 37 | { |
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| [23] | 38 | error_t error; |
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| 39 | paddr_t paddr; |
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| 40 | struct vfs_stat_s k_stat; |
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| 41 | xptr_t file_xp; |
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| 42 | |
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| 43 | thread_t * this = CURRENT_THREAD; |
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| 44 | process_t * process = this->process; |
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| [1] | 45 | |
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| [23] | 46 | // check stat structure in user space |
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| 47 | error = vmm_v2p_translate( false , stat , &paddr ); |
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| [1] | 48 | |
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| [23] | 49 | if( error ) |
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| [1] | 50 | { |
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| [23] | 51 | printk("\n[ERROR] in %s : stat structure unmapped for thread %x in process %x\n", |
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| 52 | __FUNCTION__ , this->trdid , process->pid ); |
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| 53 | this->errno = EINVAL; |
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| [1] | 54 | return -1; |
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| [23] | 55 | } |
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| [1] | 56 | |
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| [23] | 57 | // get extended pointer on remote file descriptor |
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| 58 | file_xp = process_fd_get_xptr( process , file_id ); |
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| 59 | |
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| 60 | if( file_xp == XPTR_NULL ) |
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| 61 | { |
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| 62 | printk("\n[ERROR] in %s : undefined file descriptor for thread %x in process %x\n", |
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| 63 | __FUNCTION__ , this->trdid , process->pid ); |
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| 64 | this->errno = EBADFD; |
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| 65 | return -1; |
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| 66 | } |
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| 67 | |
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| 68 | // call the relevant VFS function |
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| 69 | error = vfs_stat( file_xp, |
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| 70 | &k_stat ); |
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| 71 | if( error ) |
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| [1] | 72 | { |
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| [23] | 73 | printk("\n[ERROR] in %s : cannot access file %d for thread %x in process %x\n", |
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| 74 | __FUNCTION__ , file_id , this->trdid , process->pid ); |
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| 75 | this->errno = error; |
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| [1] | 76 | return -1; |
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| 77 | } |
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| [23] | 78 | |
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| 79 | // copy stat to user space |
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| 80 | hal_copy_to_uspace( stat , &k_stat , sizeof(struct vfs_stat_s) ); |
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| [1] | 81 | |
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| [124] | 82 | hal_fence(); |
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| [23] | 83 | |
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| [1] | 84 | return 0; |
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| [23] | 85 | |
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| 86 | } // end sys_stat() |
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| 87 | |
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