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Kernel/LibC: Implement unlinkat

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Bananymous
2025-06-01 05:06:47 +03:00
parent 91756c057e
commit b75970958e
4 changed files with 18 additions and 6 deletions
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2
kernel/include/kernel/Process.h
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@@ -107,7 +107,7 @@ namespace Kernel
BAN::ErrorOr<long> sys_access(const char* path, int amode);
BAN::ErrorOr<long> sys_create_dir(const char*, mode_t);
BAN::ErrorOr<long> sys_hardlinkat(int fd1, const char* path1, int fd2, const char* path2, int flag);
BAN::ErrorOr<long> sys_unlink(const char*);
BAN::ErrorOr<long> sys_unlinkat(int fd, const char* path, int flag);
BAN::ErrorOr<long> sys_readlinkat(int fd, const char* path, char* buffer, size_t bufsize);
BAN::ErrorOr<long> sys_symlinkat(const char* path1, int fd, const char* path2);

11
kernel/kernel/Process.cpp
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@@ -1158,12 +1158,19 @@ namespace Kernel
return 0;
}
BAN::ErrorOr<long> Process::sys_unlink(const char* path)
BAN::ErrorOr<long> Process::sys_unlinkat(int fd, const char* path, int flag)
{
if (flag && flag != AT_REMOVEDIR)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
auto [parent, file_name] = TRY(find_parent_file(AT_FDCWD, path, O_WRONLY));
auto [parent, file_name] = TRY(find_parent_file(fd, path, O_WRONLY));
if (TRY(parent.inode->find_inode(file_name))->mode().ifdir() != (flag == AT_REMOVEDIR))
return BAN::Error::from_errno(flag ? EPERM : ENOTDIR);
TRY(parent.inode->unlink(file_name));
return 0;