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Kernel+LibC+LibCore: Implement mkdirat(2)

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sin-ack 2022-10-01 11:36:24 +00:00 committed by Andrew Kaster
parent 6445a706cf
commit eb5389e933
Notes: sideshowbarker 2024-07-17 03:24:00 +09:00 
Author: https://github.com/sin-ack
Commit: https://github.com/SerenityOS/serenity/commit/eb5389e933
Pull-request: https://github.com/SerenityOS/serenity/pull/15428
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/BertalanD
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/timschumi
5 changed files with 12 additions and 5 deletions
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2
Kernel/Process.h
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@ -374,7 +374,7 @@ public:
ErrorOr<FlatPtr> sys$access(Userspace<char const*> pathname, size_t path_length, int mode);
ErrorOr<FlatPtr> sys$fcntl(int fd, int cmd, uintptr_t extra_arg);
ErrorOr<FlatPtr> sys$ioctl(int fd, unsigned request, FlatPtr arg);
ErrorOr<FlatPtr> sys$mkdir(Userspace<char const*> pathname, size_t path_length, mode_t mode);
ErrorOr<FlatPtr> sys$mkdir(int dirfd, Userspace<char const*> pathname, size_t path_length, mode_t mode);
ErrorOr<FlatPtr> sys$times(Userspace<tms*>);
ErrorOr<FlatPtr> sys$utime(Userspace<char const*> pathname, size_t path_length, Userspace<const struct utimbuf*>);
ErrorOr<FlatPtr> sys$utimensat(Userspace<Syscall::SC_utimensat_params const*>);

4
Kernel/Syscalls/mkdir.cpp
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@ -10,12 +10,12 @@
namespace Kernel {
ErrorOr<FlatPtr> Process::sys$mkdir(Userspace<char const*> user_path, size_t path_length, mode_t mode)
ErrorOr<FlatPtr> Process::sys$mkdir(int dirfd, Userspace<char const*> user_path, size_t path_length, mode_t mode)
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::cpath));
auto path = TRY(get_syscall_path_argument(user_path, path_length));
TRY(VirtualFileSystem::the().mkdir(credentials(), path->view(), mode & ~umask(), current_directory()));
TRY(VirtualFileSystem::the().mkdir(credentials(), path->view(), mode & ~umask(), TRY(custody_for_dirfd(dirfd))));
return 0;
}
}

8
Userland/Libraries/LibC/stat.cpp
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@ -23,12 +23,18 @@ mode_t umask(mode_t mask)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkdir.html
int mkdir(char const* pathname, mode_t mode)
{
return mkdirat(AT_FDCWD, pathname, mode);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkdirat.html
int mkdirat(int dirfd, char const* pathname, mode_t mode)
{
if (!pathname) {
errno = EFAULT;
return -1;
}
int rc = syscall(SC_mkdir, pathname, strlen(pathname), mode);
int rc = syscall(SC_mkdir, dirfd, pathname, strlen(pathname), mode);
__RETURN_WITH_ERRNO(rc, rc, -1);
}

1
Userland/Libraries/LibC/sys/stat.h
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@ -18,6 +18,7 @@ int chmod(char const* pathname, mode_t);
int fchmodat(int fd, char const* path, mode_t mode, int flag);
int fchmod(int fd, mode_t);
int mkdir(char const* pathname, mode_t);
int mkdirat(int dirfd, char const* pathname, mode_t);
int mkfifo(char const* pathname, mode_t);
int fstat(int fd, struct stat* statbuf);
int lstat(char const* path, struct stat* statbuf);

2
Userland/Libraries/LibCore/System.cpp
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@ -857,7 +857,7 @@ ErrorOr<void> mkdir(StringView path, mode_t mode)
if (path.is_null())
return Error::from_errno(EFAULT);
#ifdef AK_OS_SERENITY
int rc = syscall(SC_mkdir, path.characters_without_null_termination(), path.length(), mode);
int rc = syscall(SC_mkdir, AT_FDCWD, path.characters_without_null_termination(), path.length(), mode);
HANDLE_SYSCALL_RETURN_VALUE("mkdir", rc, {});
#else
DeprecatedString path_string = path;