Changeset 407 for trunk/kernel/syscalls/sys_readdir.c
- Timestamp:
- Nov 7, 2017, 3:08:12 PM (6 years ago)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
trunk/kernel/syscalls/sys_readdir.c
r23 r407 31 31 #include <process.h> 32 32 #include <syscalls.h> 33 #include <shared_syscalls.h> 33 34 34 /////////////////////////////////////// ///35 int sys_readdir ( uint32_t file_id,36 vfs_dirent_t * dirent)35 /////////////////////////////////////// 36 int sys_readdir( DIR * dirp, 37 struct dirent ** dentp ) 37 38 { 38 error_t error; 39 paddr_t paddr; 40 xptr_t file_xp; // extended pointer on searched directory file descriptor 41 vfs_dirent_t k_dirent; // kernel copy of dirent 42 43 thread_t * this = CURRENT_THREAD; 44 process_t * process = this->process; 45 46 // check file_id argument 47 if( file_id >= CONFIG_PROCESS_FILE_MAX_NR ) 48 { 49 printk("\n[ERROR] in %s : illegal file descriptor index\n", __FUNCTION__ ); 50 this->errno = EBADFD; 51 return -1; 52 } 53 54 // check dirent structure in user space 55 error = vmm_v2p_translate( false , dirent , &paddr ); 56 57 if ( error ) 58 { 59 printk("\n[ERROR] in %s : user buffer for dirent unmapped = %x\n", 60 __FUNCTION__ , (intptr_t)dirent ); 61 this->errno = EFAULT; 62 return -1; 63 } 64 65 // get extended pointer on remote file descriptor 66 file_xp = process_fd_get_xptr( process , file_id ); 67 68 if( file_xp == XPTR_NULL ) 69 { 70 printk("\n[ERROR] in %s : undefined file descriptor index = %d\n", 71 __FUNCTION__ , file_id ); 72 this->errno = EBADFD; 73 return -1; 74 } 75 76 // call the relevant VFS function 77 error = vfs_readdir( file_xp , &k_dirent ); 78 79 if( error ) 80 { 81 printk("\n[ERROR] in %s : cannot access directory %d\n", 82 __FUNCTION__ , file_id ); 83 this->errno = error; 84 return -1; 85 } 86 87 // copy dirent to user space 88 hal_copy_to_uspace( dirent , &k_dirent , sizeof(vfs_dirent_t) ); 89 90 return 0; 91 39 printk("\n[ERROR] in %s : not implemented yet\n", __FUNCTION__ ); 40 CURRENT_THREAD->errno = ENOMEM; 41 return -1; 92 42 } // end sys_readdir()
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