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Kernel/LibC: add SYS_STAT and stat(), lstat()

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Bananymous
2023-06-05 14:36:17 +03:00
parent 69b94dad00
commit d1ad38c8d4
10 changed files with 75 additions and 9 deletions
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2
kernel/include/kernel/Process.h
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@@ -64,7 +64,7 @@ namespace Kernel
BAN::ErrorOr<off_t> tell(int fd);
BAN::ErrorOr<void> fstat(int fd, struct stat*);
BAN::ErrorOr<void> stat(BAN::StringView path, struct stat*);
BAN::ErrorOr<void> stat(BAN::StringView path, struct stat*, int flags);
BAN::ErrorOr<void> mount(BAN::StringView source, BAN::StringView target);

4
kernel/kernel/Process.cpp
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@@ -522,9 +522,9 @@ namespace Kernel
return {};
}
BAN::ErrorOr<void> Process::stat(BAN::StringView path, struct stat* out)
BAN::ErrorOr<void> Process::stat(BAN::StringView path, struct stat* out, int flags)
{
int fd = TRY(open(path, O_RDONLY | O_NOFOLLOW));
int fd = TRY(open(path, flags));
auto ret = fstat(fd, out);
MUST(close(fd));
return ret;

4
kernel/kernel/Shell.cpp
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@@ -534,7 +534,7 @@ argument_done:
BAN::String entry_path;
TRY(entry_path.append(entry_prefix));
TRY(entry_path.append(entry));
TRY(Process::current().stat(entry_path, &st));
TRY(Process::current().stat(entry_path, &st, O_RDONLY | O_NOFOLLOW));
Inode::Mode mode { st.st_mode };
@@ -577,7 +577,7 @@ argument_done:
}
struct stat st;
TRY(Process::current().stat(arguments[1], &st));
TRY(Process::current().stat(arguments[1], &st, O_RDONLY | O_NOFOLLOW));
Inode::Mode mode { st.st_mode };

11
kernel/kernel/Syscall.cpp
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@@ -128,6 +128,14 @@ namespace Kernel
return ret.value();
}
long sys_stat(const char* path, struct stat* buf, int flags)
{
auto ret = Process::current().stat(path, buf, flags);
if (ret.is_error())
return -ret.error().get_error_code();
return 0;
}
extern "C" long sys_fork_trampoline();
extern "C" long cpp_syscall_handler(int syscall, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t arg5)
@@ -193,6 +201,9 @@ namespace Kernel
case SYS_WAIT:
ret = sys_wait((pid_t)arg1, (int*)arg2, (int)arg3);
break;
case SYS_STAT:
ret = sys_stat((const char*)arg1, (struct stat*)arg2, (int)arg3);
break;
default:
Kernel::panic("Unknown syscall {}", syscall);
}

4
kernel/kernel/kernel.cpp
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@@ -180,8 +180,8 @@ static void init2(void* tty1)
((TTY*)tty1)->initialize_device();
//MUST(Process::create_userspace("/usr/bin/test"sv));
//return;
MUST(Process::create_userspace("/usr/bin/Shell"sv));
return;
Process::create_kernel(
[](void*)