1 use crate::{ 2 process::ProcessManager, 3 syscall::{user_access::check_and_clone_cstr, SystemError}, 4 }; 5 6 use super::{ 7 fcntl::AtFlags, syscall::ModeType, utils::user_path_at, MAX_PATHLEN, 8 VFS_MAX_FOLLOW_SYMLINK_TIMES, 9 }; 10 11 pub(super) fn do_faccessat( 12 dirfd: i32, 13 path: *const u8, 14 mode: ModeType, 15 flags: u32, 16 ) -> Result<usize, SystemError> { 17 if (mode.bits() & (!ModeType::S_IRWXO.bits())) != 0 { 18 return Err(SystemError::EINVAL); 19 } 20 21 if (flags 22 & (!((AtFlags::AT_EACCESS | AtFlags::AT_SYMLINK_NOFOLLOW | AtFlags::AT_EMPTY_PATH).bits() 23 as u32))) 24 != 0 25 { 26 return Err(SystemError::EINVAL); 27 } 28 29 // let follow_symlink = flags & AtFlags::AT_SYMLINK_NOFOLLOW.bits() as u32 == 0; 30 31 let path = check_and_clone_cstr(path, Some(MAX_PATHLEN))?; 32 33 if path.len() == 0 { 34 return Err(SystemError::EINVAL); 35 } 36 37 let (inode, path) = user_path_at(&ProcessManager::current_pcb(), dirfd, path)?; 38 39 // 如果找不到文件，则返回错误码ENOENT 40 let _inode = inode.lookup_follow_symlink(path.as_str(), VFS_MAX_FOLLOW_SYMLINK_TIMES)?; 41 42 // todo: 接着完善（可以借鉴linux 6.1.9的do_faccessat） 43 return Ok(0); 44 } 45 46 pub fn do_fchmodat(dirfd: i32, path: *const u8, _mode: ModeType) -> Result<usize, SystemError> { 47 let path = check_and_clone_cstr(path, Some(MAX_PATHLEN))?; 48 49 if path.len() == 0 { 50 return Err(SystemError::EINVAL); 51 } 52 53 let (inode, path) = user_path_at(&ProcessManager::current_pcb(), dirfd, path)?; 54 55 // 如果找不到文件，则返回错误码ENOENT 56 let _inode = inode.lookup_follow_symlink(path.as_str(), VFS_MAX_FOLLOW_SYMLINK_TIMES)?; 57 58 kwarn!("do_fchmodat: not implemented yet\n"); 59 // todo: 真正去改变文件的权限 60 61 return Ok(0); 62 } 63