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//+private
package os2
import "core:strings"
import "core:strconv"
import "base:runtime"
import "core:sys/unix"
_Path_Separator :: '/'
_Path_List_Separator :: ':'
_S_IFMT :: 0o170000 // Type of file mask
_S_IFIFO :: 0o010000 // Named pipe (fifo)
_S_IFCHR :: 0o020000 // Character special
_S_IFDIR :: 0o040000 // Directory
_S_IFBLK :: 0o060000 // Block special
_S_IFREG :: 0o100000 // Regular
_S_IFLNK :: 0o120000 // Symbolic link
_S_IFSOCK :: 0o140000 // Socket
_OPENDIR_FLAGS :: _O_RDONLY|_O_NONBLOCK|_O_DIRECTORY|_O_LARGEFILE|_O_CLOEXEC
_is_path_separator :: proc(c: byte) -> bool {
return c == '/'
}
_mkdir :: proc(path: string, perm: File_Mode) -> Error {
// NOTE: These modes would require sys_mknod, however, that would require
// additional arguments to this function.
if perm & (File_Mode_Named_Pipe | File_Mode_Device | File_Mode_Char_Device | File_Mode_Sym_Link) != 0 {
return .Invalid_Argument
}
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
return _ok_or_error(unix.sys_mkdir(path_cstr, uint(perm & 0o777)))
}
_mkdir_all :: proc(path: string, perm: File_Mode) -> Error {
_mkdirat :: proc(dfd: int, path: []u8, perm: int, has_created: ^bool) -> Error {
if len(path) == 0 {
return _ok_or_error(unix.sys_close(dfd))
}
i: int
for /**/; i < len(path) - 1 && path[i] != '/'; i += 1 {}
path[i] = 0
new_dfd := unix.sys_openat(dfd, cstring(&path[0]), _OPENDIR_FLAGS)
switch new_dfd {
case -ENOENT:
if res := unix.sys_mkdirat(dfd, cstring(&path[0]), uint(perm)); res < 0 {
return _get_platform_error(res)
}
has_created^ = true
if new_dfd = unix.sys_openat(dfd, cstring(&path[0]), _OPENDIR_FLAGS); new_dfd < 0 {
return _get_platform_error(new_dfd)
}
fallthrough
case 0:
if res := unix.sys_close(dfd); res < 0 {
return _get_platform_error(res)
}
// skip consecutive '/'
for i += 1; i < len(path) && path[i] == '/'; i += 1 {}
return _mkdirat(new_dfd, path[i:], perm, has_created)
case:
return _get_platform_error(new_dfd)
}
unreachable()
}
if perm & (File_Mode_Named_Pipe | File_Mode_Device | File_Mode_Char_Device | File_Mode_Sym_Link) != 0 {
return .Invalid_Argument
}
// need something we can edit, and use to generate cstrings
allocated: bool
path_bytes: []u8
if len(path) > _CSTRING_NAME_HEAP_THRESHOLD {
allocated = true
path_bytes = make([]u8, len(path) + 1)
} else {
path_bytes = make([]u8, len(path) + 1, context.temp_allocator)
}
// NULL terminate the byte slice to make it a valid cstring
copy(path_bytes, path)
path_bytes[len(path)] = 0
dfd: int
if path_bytes[0] == '/' {
dfd = unix.sys_open("/", _OPENDIR_FLAGS)
path_bytes = path_bytes[1:]
} else {
dfd = unix.sys_open(".", _OPENDIR_FLAGS)
}
if dfd < 0 {
return _get_platform_error(dfd)
}
has_created: bool
_mkdirat(dfd, path_bytes, int(perm & 0o777), &has_created) or_return
if has_created {
return nil
}
return .Exist
//return has_created ? nil : .Exist
}
dirent64 :: struct {
d_ino: u64,
d_off: u64,
d_reclen: u16,
d_type: u8,
d_name: [1]u8,
}
_remove_all :: proc(path: string) -> Error {
DT_DIR :: 4
_remove_all_dir :: proc(dfd: int) -> Error {
n := 64
buf := make([]u8, n)
defer delete(buf)
loop: for {
getdents_res := unix.sys_getdents64(dfd, &buf[0], n)
switch getdents_res {
case -EINVAL:
delete(buf)
n *= 2
buf = make([]u8, n)
continue loop
case -4096..<0:
return _get_platform_error(getdents_res)
case 0:
break loop
}
d: ^dirent64
for i := 0; i < getdents_res; i += int(d.d_reclen) {
d = (^dirent64)(rawptr(&buf[i]))
d_name_cstr := cstring(&d.d_name[0])
buf_len := uintptr(d.d_reclen) - offset_of(d.d_name)
/* check for current directory (.) */
#no_bounds_check if buf_len > 1 && d.d_name[0] == '.' && d.d_name[1] == 0 {
continue
}
/* check for parent directory (..) */
#no_bounds_check if buf_len > 2 && d.d_name[0] == '.' && d.d_name[1] == '.' && d.d_name[2] == 0 {
continue
}
unlink_res: int
switch d.d_type {
case DT_DIR:
new_dfd := unix.sys_openat(dfd, d_name_cstr, _OPENDIR_FLAGS)
if new_dfd < 0 {
return _get_platform_error(new_dfd)
}
defer unix.sys_close(new_dfd)
_remove_all_dir(new_dfd) or_return
unlink_res = unix.sys_unlinkat(dfd, d_name_cstr, int(unix.AT_REMOVEDIR))
case:
unlink_res = unix.sys_unlinkat(dfd, d_name_cstr)
}
if unlink_res < 0 {
return _get_platform_error(unlink_res)
}
}
}
return nil
}
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
fd := unix.sys_open(path_cstr, _OPENDIR_FLAGS)
switch fd {
case -ENOTDIR:
return _ok_or_error(unix.sys_unlink(path_cstr))
case -4096..<0:
return _get_platform_error(fd)
}
defer unix.sys_close(fd)
_remove_all_dir(fd) or_return
return _ok_or_error(unix.sys_rmdir(path_cstr))
}
_getwd :: proc(allocator: runtime.Allocator) -> (string, Error) {
// NOTE(tetra): I would use PATH_MAX here, but I was not able to find
// an authoritative value for it across all systems.
// The largest value I could find was 4096, so might as well use the page size.
// NOTE(jason): Avoiding libc, so just use 4096 directly
PATH_MAX :: 4096
buf := make([dynamic]u8, PATH_MAX, allocator)
for {
#no_bounds_check res := unix.sys_getcwd(&buf[0], uint(len(buf)))
if res >= 0 {
return strings.string_from_null_terminated_ptr(&buf[0], len(buf)), nil
}
if res != -ERANGE {
return "", _get_platform_error(res)
}
resize(&buf, len(buf)+PATH_MAX)
}
unreachable()
}
_setwd :: proc(dir: string) -> Error {
dir_cstr := strings.clone_to_cstring(dir, context.temp_allocator)
return _ok_or_error(unix.sys_chdir(dir_cstr))
}
_get_full_path :: proc(fd: int, allocator: runtime.Allocator) -> string {
PROC_FD_PATH :: "/proc/self/fd/"
buf: [32]u8
copy(buf[:], PROC_FD_PATH)
strconv.itoa(buf[len(PROC_FD_PATH):], fd)
fullpath: string
err: Error
if fullpath, err = _read_link_cstr(cstring(&buf[0]), allocator); err != nil || fullpath[0] != '/' {
return ""
}
return fullpath
}
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