46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
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#include "Log.h"
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#include "fs/VFS.h"
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#include "memory/MemoryManager.h"
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#include "sys/Syscall.h"
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#include "thread/Scheduler.h"
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Result<u64> sys_open(Registers*, SyscallArgs args)
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{
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u64 path_address = args[0];
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if (!MemoryManager::validate_userspace_string(path_address)) return err(EFAULT);
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const char* path = (const char*)path_address;
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int flags = (int)args[1];
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Thread* current = Scheduler::current();
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kinfoln("open: trying to open file %s, flags %d", path, flags);
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auto inode = TRY(VFS::resolve_path(path));
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int fd = TRY(current->allocate_fd(0));
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current->fd_table->fds[fd] = FileDescriptor { inode, 0, flags };
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kinfoln("open: allocated file descriptor %d for inode %zu", fd, inode->inode_number());
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return (u64)fd;
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}
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Result<u64> sys_close(Registers*, SyscallArgs args)
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{
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int fd = (int)args[0];
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if (fd < 0 || fd >= FD_MAX) return err(EBADF);
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Thread* current = Scheduler::current();
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if (!current->fd_table->fds[fd].has_value()) return err(EBADF);
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kinfoln("close: closing file descriptor %d (was referencing inode %zu)", fd,
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current->fd_table->fds[fd]->inode->inode_number());
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current->fd_table->fds[fd] = {};
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return 0;
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}
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