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package os
foreign import dl "system:dl"
foreign import libc "system:c"
import "core:runtime"
import "core:strings"
OS :: "linux";
Handle :: distinct i32;
File_Time :: distinct u64;
Errno :: distinct i32;
Syscall :: distinct int;
INVALID_HANDLE :: ~Handle(0);
ERROR_NONE: Errno : 0;
EPERM: Errno : 1;
ENOENT: Errno : 2;
ESRCH: Errno : 3;
EINTR: Errno : 4;
EIO: Errno : 5;
ENXIO: Errno : 6;
EBADF: Errno : 9;
EAGAIN: Errno : 11;
ENOMEM: Errno : 12;
EACCES: Errno : 13;
EFAULT: Errno : 14;
EEXIST: Errno : 17;
ENODEV: Errno : 19;
ENOTDIR: Errno : 20;
EISDIR: Errno : 21;
EINVAL: Errno : 22;
ENFILE: Errno : 23;
EMFILE: Errno : 24;
ETXTBSY: Errno : 26;
EFBIG: Errno : 27;
ENOSPC: Errno : 28;
ESPIPE: Errno : 29;
EROFS: Errno : 30;
EPIPE: Errno : 32;
EDEADLK: Errno : 35; /* Resource deadlock would occur */
ENAMETOOLONG: Errno : 36; /* File name too long */
ENOLCK: Errno : 37; /* No record locks available */
ENOSYS: Errno : 38; /* Invalid system call number */
ENOTEMPTY: Errno : 39; /* Directory not empty */
ELOOP: Errno : 40; /* Too many symbolic links encountered */
EWOULDBLOCK: Errno : EAGAIN; /* Operation would block */
ENOMSG: Errno : 42; /* No message of desired type */
EIDRM: Errno : 43; /* Identifier removed */
ECHRNG: Errno : 44; /* Channel number out of range */
EL2NSYNC: Errno : 45; /* Level 2 not synchronized */
EL3HLT: Errno : 46; /* Level 3 halted */
EL3RST: Errno : 47; /* Level 3 reset */
ELNRNG: Errno : 48; /* Link number out of range */
EUNATCH: Errno : 49; /* Protocol driver not attached */
ENOCSI: Errno : 50; /* No CSI structure available */
EL2HLT: Errno : 51; /* Level 2 halted */
EBADE: Errno : 52; /* Invalid exchange */
EBADR: Errno : 53; /* Invalid request descriptor */
EXFULL: Errno : 54; /* Exchange full */
ENOANO: Errno : 55; /* No anode */
EBADRQC: Errno : 56; /* Invalid request code */
EBADSLT: Errno : 57; /* Invalid slot */
EDEADLOCK: Errno : EDEADLK;
EBFONT: Errno : 59; /* Bad font file format */
ENOSTR: Errno : 60; /* Device not a stream */
ENODATA: Errno : 61; /* No data available */
ETIME: Errno : 62; /* Timer expired */
ENOSR: Errno : 63; /* Out of streams resources */
ENONET: Errno : 64; /* Machine is not on the network */
ENOPKG: Errno : 65; /* Package not installed */
EREMOTE: Errno : 66; /* Object is remote */
ENOLINK: Errno : 67; /* Link has been severed */
EADV: Errno : 68; /* Advertise error */
ESRMNT: Errno : 69; /* Srmount error */
ECOMM: Errno : 70; /* Communication error on send */
EPROTO: Errno : 71; /* Protocol error */
EMULTIHOP: Errno : 72; /* Multihop attempted */
EDOTDOT: Errno : 73; /* RFS specific error */
EBADMSG: Errno : 74; /* Not a data message */
EOVERFLOW: Errno : 75; /* Value too large for defined data type */
ENOTUNIQ: Errno : 76; /* Name not unique on network */
EBADFD: Errno : 77; /* File descriptor in bad state */
EREMCHG: Errno : 78; /* Remote address changed */
ELIBACC: Errno : 79; /* Can not access a needed shared library */
ELIBBAD: Errno : 80; /* Accessing a corrupted shared library */
ELIBSCN: Errno : 81; /* .lib section in a.out corrupted */
ELIBMAX: Errno : 82; /* Attempting to link in too many shared libraries */
ELIBEXEC: Errno : 83; /* Cannot exec a shared library directly */
EILSEQ: Errno : 84; /* Illegal byte sequence */
ERESTART: Errno : 85; /* Interrupted system call should be restarted */
ESTRPIPE: Errno : 86; /* Streams pipe error */
EUSERS: Errno : 87; /* Too many users */
ENOTSOCK: Errno : 88; /* Socket operation on non-socket */
EDESTADDRREQ: Errno : 89; /* Destination address required */
EMSGSIZE: Errno : 90; /* Message too long */
EPROTOTYPE: Errno : 91; /* Protocol wrong type for socket */
ENOPROTOOPT: Errno : 92; /* Protocol not available */
EPROTONOSUPPORT: Errno : 93; /* Protocol not supported */
ESOCKTNOSUPPORT: Errno : 94; /* Socket type not supported */
EOPNOTSUPP: Errno : 95; /* Operation not supported on transport endpoint */
EPFNOSUPPORT: Errno : 96; /* Protocol family not supported */
EAFNOSUPPORT: Errno : 97; /* Address family not supported by protocol */
EADDRINUSE: Errno : 98; /* Address already in use */
EADDRNOTAVAIL: Errno : 99; /* Cannot assign requested address */
ENETDOWN: Errno : 100; /* Network is down */
ENETUNREACH: Errno : 101; /* Network is unreachable */
ENETRESET: Errno : 102; /* Network dropped connection because of reset */
ECONNABORTED: Errno : 103; /* Software caused connection abort */
ECONNRESET: Errno : 104; /* Connection reset by peer */
ENOBUFS: Errno : 105; /* No buffer space available */
EISCONN: Errno : 106; /* Transport endpoint is already connected */
ENOTCONN: Errno : 107; /* Transport endpoint is not connected */
ESHUTDOWN: Errno : 108; /* Cannot send after transport endpoint shutdown */
ETOOMANYREFS: Errno : 109; /* Too many references: cannot splice */
ETIMEDOUT: Errno : 110; /* Connection timed out */
ECONNREFUSED: Errno : 111; /* Connection refused */
EHOSTDOWN: Errno : 112; /* Host is down */
EHOSTUNREACH: Errno : 113; /* No route to host */
EALREADY: Errno : 114; /* Operation already in progress */
EINPROGRESS: Errno : 115; /* Operation now in progress */
ESTALE: Errno : 116; /* Stale file handle */
EUCLEAN: Errno : 117; /* Structure needs cleaning */
ENOTNAM: Errno : 118; /* Not a XENIX named type file */
ENAVAIL: Errno : 119; /* No XENIX semaphores available */
EISNAM: Errno : 120; /* Is a named type file */
EREMOTEIO: Errno : 121; /* Remote I/O error */
EDQUOT: Errno : 122; /* Quota exceeded */
ENOMEDIUM: Errno : 123; /* No medium found */
EMEDIUMTYPE: Errno : 124; /* Wrong medium type */
ECANCELED: Errno : 125; /* Operation Canceled */
ENOKEY: Errno : 126; /* Required key not available */
EKEYEXPIRED: Errno : 127; /* Key has expired */
EKEYREVOKED: Errno : 128; /* Key has been revoked */
EKEYREJECTED: Errno : 129; /* Key was rejected by service */
/* for robust mutexes */
EOWNERDEAD: Errno : 130; /* Owner died */
ENOTRECOVERABLE: Errno : 131; /* State not recoverable */
ERFKILL: Errno : 132; /* Operation not possible due to RF-kill */
EHWPOISON: Errno : 133; /* Memory page has hardware error */
O_RDONLY :: 0x00000;
O_WRONLY :: 0x00001;
O_RDWR :: 0x00002;
O_CREATE :: 0x00040;
O_EXCL :: 0x00080;
O_NOCTTY :: 0x00100;
O_TRUNC :: 0x00200;
O_NONBLOCK :: 0x00800;
O_APPEND :: 0x00400;
O_SYNC :: 0x01000;
O_ASYNC :: 0x02000;
O_CLOEXEC :: 0x80000;
SEEK_SET :: 0;
SEEK_CUR :: 1;
SEEK_END :: 2;
SEEK_DATA :: 3;
SEEK_HOLE :: 4;
SEEK_MAX :: SEEK_HOLE;
// NOTE(zangent): These are OS specific!
// Do not mix these up!
RTLD_LAZY :: 0x001;
RTLD_NOW :: 0x002;
RTLD_BINDING_MASK :: 0x3;
RTLD_GLOBAL :: 0x100;
// "Argv" arguments converted to Odin strings
args := _alloc_command_line_arguments();
_File_Time :: struct {
seconds: i64,
nanoseconds: i64,
}
Stat :: struct {
device_id: u64, // ID of device containing file
serial: u64, // File serial number
nlink: u64, // Number of hard links
mode: u32, // Mode of the file
uid: u32, // User ID of the file's owner
gid: u32, // Group ID of the file's group
_padding: i32, // 32 bits of padding
rdev: u64, // Device ID, if device
size: i64, // Size of the file, in bytes
block_size: i64, // Optimal bllocksize for I/O
blocks: i64, // Number of 512-byte blocks allocated
last_access: _File_Time, // Time of last access
modified: _File_Time, // Time of last modification
status_change: _File_Time, // Time of last status change
_reserve1,
_reserve2,
_reserve3: i64,
};
// File type
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
// File mode
// Read, write, execute/search by owner
S_IRWXU :: 0o0700; // RWX mask for owner
S_IRUSR :: 0o0400; // R for owner
S_IWUSR :: 0o0200; // W for owner
S_IXUSR :: 0o0100; // X for owner
// Read, write, execute/search by group
S_IRWXG :: 0o0070; // RWX mask for group
S_IRGRP :: 0o0040; // R for group
S_IWGRP :: 0o0020; // W for group
S_IXGRP :: 0o0010; // X for group
// Read, write, execute/search by others
S_IRWXO :: 0o0007; // RWX mask for other
S_IROTH :: 0o0004; // R for other
S_IWOTH :: 0o0002; // W for other
S_IXOTH :: 0o0001; // X for other
S_ISUID :: 0o4000; // Set user id on execution
S_ISGID :: 0o2000; // Set group id on execution
S_ISVTX :: 0o1000; // Directory restrcted delete
S_ISLNK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFLNK;
S_ISREG :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFREG;
S_ISDIR :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFDIR;
S_ISCHR :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFCHR;
S_ISBLK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFBLK;
S_ISFIFO :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFIFO;
S_ISSOCK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFSOCK;
F_OK :: 0; // Test for file existance
X_OK :: 1; // Test for execute permission
W_OK :: 2; // Test for write permission
R_OK :: 4; // Test for read permission
SYS_GETTID: Syscall : 186;
foreign libc {
@(link_name="__errno_location") __errno_location :: proc() -> ^int ---;
@(link_name="syscall") syscall :: proc(number: Syscall, #c_vararg args: ..any) -> int ---;
@(link_name="open") _unix_open :: proc(path: cstring, flags: int, mode: int) -> Handle ---;
@(link_name="close") _unix_close :: proc(fd: Handle) -> int ---;
@(link_name="read") _unix_read :: proc(fd: Handle, buf: rawptr, size: int) -> int ---;
@(link_name="write") _unix_write :: proc(fd: Handle, buf: rawptr, size: int) -> int ---;
@(link_name="lseek64") _unix_seek :: proc(fd: Handle, offset: i64, whence: i32) -> i64 ---;
@(link_name="gettid") _unix_gettid :: proc() -> u64 ---;
@(link_name="getpagesize") _unix_getpagesize :: proc() -> i32 ---;
@(link_name="stat") _unix_stat :: proc(path: cstring, stat: ^Stat) -> int ---;
@(link_name="fstat") _unix_fstat :: proc(fd: Handle, stat: ^Stat) -> int ---;
@(link_name="access") _unix_access :: proc(path: cstring, mask: int) -> int ---;
@(link_name="malloc") _unix_malloc :: proc(size: int) -> rawptr ---;
@(link_name="calloc") _unix_calloc :: proc(num, size: int) -> rawptr ---;
@(link_name="free") _unix_free :: proc(ptr: rawptr) ---;
@(link_name="realloc") _unix_realloc :: proc(ptr: rawptr, size: int) -> rawptr ---;
@(link_name="getenv") _unix_getenv :: proc(cstring) -> cstring ---;
@(link_name="exit") _unix_exit :: proc(status: int) -> ! ---;
}
foreign dl {
@(link_name="dlopen") _unix_dlopen :: proc(filename: cstring, flags: int) -> rawptr ---;
@(link_name="dlsym") _unix_dlsym :: proc(handle: rawptr, symbol: cstring) -> rawptr ---;
@(link_name="dlclose") _unix_dlclose :: proc(handle: rawptr) -> int ---;
@(link_name="dlerror") _unix_dlerror :: proc() -> cstring ---;
}
is_path_separator :: proc(r: rune) -> bool {
return r == '/';
}
get_last_error :: proc() -> int {
return __errno_location()^;
}
open :: proc(path: string, flags: int = O_RDONLY, mode: int = 0) -> (Handle, Errno) {
cstr := strings.clone_to_cstring(path);
handle := _unix_open(cstr, flags, mode);
delete(cstr);
if handle == -1 {
return INVALID_HANDLE, Errno(get_last_error());
}
return handle, ERROR_NONE;
}
close :: proc(fd: Handle) -> Errno {
result := _unix_close(fd);
if result == -1 {
return Errno(get_last_error());
}
return ERROR_NONE;
}
read :: proc(fd: Handle, data: []byte) -> (int, Errno) {
bytes_read := _unix_read(fd, &data[0], len(data));
if bytes_read == -1 {
return -1, Errno(get_last_error());
}
return bytes_read, ERROR_NONE;
}
write :: proc(fd: Handle, data: []byte) -> (int, Errno) {
if len(data) == 0 {
return 0, ERROR_NONE;
}
bytes_written := _unix_write(fd, &data[0], len(data));
if bytes_written == -1 {
return -1, Errno(get_last_error());
}
return bytes_written, ERROR_NONE;
}
seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) {
res := _unix_seek(fd, offset, i32(whence));
if res == -1 {
return -1, Errno(get_last_error());
}
return res, ERROR_NONE;
}
file_size :: proc(fd: Handle) -> (i64, Errno) {
s, err := fstat(fd);
if err != ERROR_NONE {
return -1, err;
}
return s.size, ERROR_NONE;
}
// NOTE(bill): Uses startup to initialize it
stdin: Handle = 0;
stdout: Handle = 1;
stderr: Handle = 2;
/* TODO(zangent): Implement these!
last_write_time :: proc(fd: Handle) -> File_Time {}
last_write_time_by_name :: proc(name: string) -> File_Time {}
*/
last_write_time :: proc(fd: Handle) -> (File_Time, Errno) {
s, err := fstat(fd);
if err != ERROR_NONE {
return 0, err;
}
return File_Time(s.modified.nanoseconds), ERROR_NONE;
}
last_write_time_by_name :: proc(name: string) -> (File_Time, Errno) {
s, err := stat(name);
if err != ERROR_NONE {
return 0, err;
}
return File_Time(s.modified.nanoseconds), ERROR_NONE;
}
stat :: inline proc(path: string) -> (Stat, Errno) {
cstr := strings.clone_to_cstring(path);
defer delete(cstr);
s: Stat;
result := _unix_stat(cstr, &s);
if result == -1 {
return s, Errno(get_last_error());
}
return s, ERROR_NONE;
}
fstat :: inline proc(fd: Handle) -> (Stat, Errno) {
s: Stat;
result := _unix_fstat(fd, &s);
if result == -1 {
return s, Errno(get_last_error());
}
return s, ERROR_NONE;
}
access :: inline proc(path: string, mask: int) -> (bool, Errno) {
cstr := strings.clone_to_cstring(path);
defer delete(cstr);
result := _unix_access(cstr, mask);
if result == -1 {
return false, Errno(get_last_error());
}
return true, ERROR_NONE;
}
heap_alloc :: proc(size: int) -> rawptr {
assert(size >= 0);
return _unix_calloc(1, size);
}
heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
return _unix_realloc(ptr, new_size);
}
heap_free :: proc(ptr: rawptr) {
_unix_free(ptr);
}
getenv :: proc(name: string) -> (string, bool) {
path_str := strings.clone_to_cstring(name);
defer delete(path_str);
cstr := _unix_getenv(path_str);
if cstr == nil {
return "", false;
}
return string(cstr), true;
}
exit :: proc(code: int) -> ! {
_unix_exit(code);
}
current_thread_id :: proc "contextless" () -> int {
return syscall(SYS_GETTID);
}
dlopen :: inline proc(filename: string, flags: int) -> rawptr {
cstr := strings.clone_to_cstring(filename);
defer delete(cstr);
handle := _unix_dlopen(cstr, flags);
return handle;
}
dlsym :: inline proc(handle: rawptr, symbol: string) -> rawptr {
assert(handle != nil);
cstr := strings.clone_to_cstring(symbol);
defer delete(cstr);
proc_handle := _unix_dlsym(handle, cstr);
return proc_handle;
}
dlclose :: inline proc(handle: rawptr) -> bool {
assert(handle != nil);
return _unix_dlclose(handle) == 0;
}
dlerror :: proc() -> string {
return string(_unix_dlerror());
}
get_page_size :: proc() -> int {
// NOTE(tetra): The page size never changes, so why do anything complicated
// if we don't have to.
@static page_size := -1;
if page_size != -1 do return page_size;
page_size = int(_unix_getpagesize());
return page_size;
}
_alloc_command_line_arguments :: proc() -> []string {
res := make([]string, len(runtime.args__));
for arg, i in runtime.args__ {
res[i] = string(arg);
}
return res;
}
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