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kernel: Replace unlink() with unlinkat()
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This commit is contained in:
apio 2023-04-18 19:36:29 +02:00
parent 259ea86c20
commit 02f8a50b9d
Signed by: apio
GPG Key ID: B8A7D06E42258954
5 changed files with 12 additions and 8 deletions
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9
kernel/src/sys/link.cpp
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@ -3,10 +3,11 @@
#include "thread/Scheduler.h"
#include <luna/PathParser.h>
Result<u64> sys_unlink(Registers*, SyscallArgs args)
Result<u64> sys_unlinkat(Registers*, SyscallArgs args)
{
auto path = TRY(MemoryManager::strdup_from_user(args[0]));
int flags = (int)args[1];
int dirfd = (int)args[0];
auto path = TRY(MemoryManager::strdup_from_user(args[1]));
int flags = (int)args[2];
Thread* current = Scheduler::current();
@ -17,7 +18,7 @@ Result<u64> sys_unlink(Registers*, SyscallArgs args)
if (basename.view() == ".") return err(EINVAL);
auto inode = TRY(VFS::resolve_path(dirname.chars(), current->auth, current->current_directory));
auto inode = TRY(current->resolve_atfile(dirfd, dirname, false));
if (!VFS::can_write(inode, current->auth)) return err(EACCES);
if (flags > 0)

2
libc/include/bits/atfile.h
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@ -7,4 +7,6 @@
#define AT_EMPTY_PATH 1
#define AT_REMOVEDIR 1
#endif

4
libc/src/unistd.cpp
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@ -304,13 +304,13 @@ extern "C"
int unlink(const char* path)
{
long rc = syscall(SYS_unlink, path, 0);
long rc = syscall(SYS_unlinkat, AT_FDCWD, path, 0);
__errno_return(rc, int);
}
int rmdir(const char* path)
{
long rc = syscall(SYS_unlink, path, 1);
long rc = syscall(SYS_unlinkat, AT_FDCWD, path, AT_REMOVEDIR);
__errno_return(rc, int);
}
}

2
libluna/include/luna/Syscall.h
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@ -4,7 +4,7 @@
_e(exit) _e(clock_gettime) _e(mmap) _e(munmap) _e(usleep) _e(openat) _e(close) _e(read) _e(getpid) _e(write) \
_e(lseek) _e(mkdir) _e(execve) _e(mknod) _e(fork) _e(waitpid) _e(getppid) _e(fcntl) _e(getdents) _e(getuid) \
_e(geteuid) _e(getgid) _e(getegid) _e(setuid) _e(setgid) _e(seteuid) _e(setegid) _e(chmod) _e(chown) \
_e(ioctl) _e(fstatat) _e(chdir) _e(getcwd) _e(unlink)
_e(ioctl) _e(fstatat) _e(chdir) _e(getcwd) _e(unlinkat)
enum Syscalls
{

3
libos/src/FileSystem.cpp
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@ -3,6 +3,7 @@
#include <os/FileSystem.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdlib.h>
#include <sys/stat.h>
@ -38,7 +39,7 @@ namespace os::FileSystem
Result<void> remove(StringView path)
{
long rc = syscall(SYS_unlink, path.chars(), 0);
long rc = syscall(SYS_unlinkat, AT_FDCWD, path.chars(), 0);
return Result<void>::from_syscall(rc);
}