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Odin/core/os/os_linux.odin
gingerBill 038086d1d9 Alias heap calls from base:runtime is core:os
2024-01-28 22:47:55 +00:00

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package os
foreign import dl "system:dl"
foreign import libc "system:c"
import "base:runtime"
import "core:strings"
import "core:c"
import "core:strconv"
import "base:intrinsics"
// NOTE(flysand): For compatibility we'll make core:os package
// depend on the old (scheduled for removal) linux package.
// Seeing that there are plans for os2, I'm imagining that *that*
// package should inherit the new sys functionality.
// The reasons for these are as follows:
// 1. It's very hard to update this package without breaking *a lot* of code.
// 2. os2 is not stable anyways, so we can break compatibility all we want
// It might be weird to bring up compatibility when Odin in it's nature isn't
// all that about compatibility. But we don't want to push experimental changes
// and have people's code break while it's still work in progress.
import unix "core:sys/unix"
Handle :: distinct i32
Pid :: distinct i32
File_Time :: distinct u64
Errno :: distinct i32
Socket :: 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
ERANGE: Errno : 34 /* Result too large */
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 */
ADDR_NO_RANDOMIZE :: 0x40000
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_DATA :: 3
SEEK_HOLE :: 4
SEEK_MAX :: SEEK_HOLE
AF_UNSPEC: int : 0
AF_UNIX: int : 1
AF_LOCAL: int : AF_UNIX
AF_INET: int : 2
AF_INET6: int : 10
AF_PACKET: int : 17
AF_BLUETOOTH: int : 31
SOCK_STREAM: int : 1
SOCK_DGRAM: int : 2
SOCK_RAW: int : 3
SOCK_RDM: int : 4
SOCK_SEQPACKET: int : 5
SOCK_PACKET: int : 10
INADDR_ANY: c.ulong : 0
INADDR_BROADCAST: c.ulong : 0xffffffff
INADDR_NONE: c.ulong : 0xffffffff
INADDR_DUMMY: c.ulong : 0xc0000008
IPPROTO_IP: int : 0
IPPROTO_ICMP: int : 1
IPPROTO_TCP: int : 6
IPPROTO_UDP: int : 17
IPPROTO_IPV6: int : 41
IPPROTO_ETHERNET: int : 143
IPPROTO_RAW: int : 255
SHUT_RD: int : 0
SHUT_WR: int : 1
SHUT_RDWR: int : 2
SOL_SOCKET: int : 1
SO_DEBUG: int : 1
SO_REUSEADDR: int : 2
SO_DONTROUTE: int : 5
SO_BROADCAST: int : 6
SO_SNDBUF: int : 7
SO_RCVBUF: int : 8
SO_KEEPALIVE: int : 9
SO_OOBINLINE: int : 10
SO_LINGER: int : 13
SO_REUSEPORT: int : 15
SO_RCVTIMEO_NEW: int : 66
SO_SNDTIMEO_NEW: int : 67
TCP_NODELAY: int : 1
TCP_CORK: int : 3
MSG_TRUNC : int : 0x20
// TODO: add remaining fcntl commands
// reference: https://github.com/torvalds/linux/blob/master/include/uapi/asm-generic/fcntl.h
F_GETFL: int : 3 /* Get file flags */
F_SETFL: int : 4 /* Set file flags */
// NOTE(zangent): These are OS specific!
// Do not mix these up!
RTLD_LAZY :: 0x001
RTLD_NOW :: 0x002
RTLD_BINDING_MASK :: 0x3
RTLD_GLOBAL :: 0x100
socklen_t :: c.int
Timeval :: struct {
seconds: i64,
microseconds: int,
}
// "Argv" arguments converted to Odin strings
args := _alloc_command_line_arguments()
Unix_File_Time :: struct {
seconds: i64,
nanoseconds: i64,
}
when ODIN_ARCH == .arm64 {
OS_Stat :: struct {
device_id: u64, // ID of device containing file
serial: u64, // File serial number
mode: u32, // Mode of the file
nlink: u32, // Number of hard links
uid: u32, // User ID of the file's owner
gid: u32, // Group ID of the file's group
rdev: u64, // Device ID, if device
_: u64, // Padding
size: i64, // Size of the file, in bytes
block_size: i32, // Optimal blocksize for I/O
_: i32, // Padding
blocks: i64, // Number of 512-byte blocks allocated
last_access: Unix_File_Time, // Time of last access
modified: Unix_File_Time, // Time of last modification
status_change: Unix_File_Time, // Time of last status change
_reserved: [2]i32,
}
#assert(size_of(OS_Stat) == 128)
} else {
OS_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
_: 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: Unix_File_Time, // Time of last access
modified: Unix_File_Time, // Time of last modification
status_change: Unix_File_Time, // Time of last status change
_reserved: [3]i64,
}
}
// NOTE(laleksic, 2021-01-21): Comment and rename these to match OS_Stat above
Dirent :: struct {
ino: u64,
off: u64,
reclen: u16,
type: u8,
name: [256]byte,
}
ADDRESS_FAMILY :: u16
SOCKADDR :: struct #packed {
sa_family: ADDRESS_FAMILY,
sa_data: [14]c.char,
}
SOCKADDR_STORAGE_LH :: struct #packed {
ss_family: ADDRESS_FAMILY,
__ss_pad1: [6]c.char,
__ss_align: i64,
__ss_pad2: [112]c.char,
}
sockaddr_in :: struct #packed {
sin_family: ADDRESS_FAMILY,
sin_port: u16be,
sin_addr: in_addr,
sin_zero: [8]c.char,
}
sockaddr_in6 :: struct #packed {
sin6_family: ADDRESS_FAMILY,
sin6_port: u16be,
sin6_flowinfo: c.ulong,
sin6_addr: in6_addr,
sin6_scope_id: c.ulong,
}
in_addr :: struct #packed {
s_addr: u32,
}
in6_addr :: struct #packed {
s6_addr: [16]u8,
}
rtnl_link_stats :: struct #packed {
rx_packets: u32,
tx_packets: u32,
rx_bytes: u32,
tx_bytes: u32,
rx_errors: u32,
tx_errors: u32,
rx_dropped: u32,
tx_dropped: u32,
multicast: u32,
collisions: u32,
rx_length_errors: u32,
rx_over_errors: u32,
rx_crc_errors: u32,
rx_frame_errors: u32,
rx_fifo_errors: u32,
rx_missed_errors: u32,
tx_aborted_errors: u32,
tx_carrier_errors: u32,
tx_fifo_errors: u32,
tx_heartbeat_errors: u32,
tx_window_errors: u32,
rx_compressed: u32,
tx_compressed: u32,
rx_nohandler: u32,
}
SIOCGIFFLAG :: enum c.int {
UP = 0, /* Interface is up. */
BROADCAST = 1, /* Broadcast address valid. */
DEBUG = 2, /* Turn on debugging. */
LOOPBACK = 3, /* Is a loopback net. */
POINT_TO_POINT = 4, /* Interface is point-to-point link. */
NO_TRAILERS = 5, /* Avoid use of trailers. */
RUNNING = 6, /* Resources allocated. */
NOARP = 7, /* No address resolution protocol. */
PROMISC = 8, /* Receive all packets. */
ALL_MULTI = 9, /* Receive all multicast packets. Unimplemented. */
MASTER = 10, /* Master of a load balancer. */
SLAVE = 11, /* Slave of a load balancer. */
MULTICAST = 12, /* Supports multicast. */
PORTSEL = 13, /* Can set media type. */
AUTOMEDIA = 14, /* Auto media select active. */
DYNAMIC = 15, /* Dialup device with changing addresses. */
LOWER_UP = 16,
DORMANT = 17,
ECHO = 18,
}
SIOCGIFFLAGS :: bit_set[SIOCGIFFLAG; c.int]
ifaddrs :: struct {
next: ^ifaddrs,
name: cstring,
flags: SIOCGIFFLAGS,
address: ^SOCKADDR,
netmask: ^SOCKADDR,
broadcast_or_dest: ^SOCKADDR, // Broadcast or Point-to-Point address
data: rawptr, // Address-specific data.
}
Dir :: distinct rawptr // DIR*
// 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 :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFLNK }
S_ISREG :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFREG }
S_ISDIR :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFDIR }
S_ISCHR :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFCHR }
S_ISBLK :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFBLK }
S_ISFIFO :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFIFO }
S_ISSOCK :: #force_inline proc(m: u32) -> bool { 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
AT_FDCWD :: ~uintptr(99) /* -100 */
AT_REMOVEDIR :: uintptr(0x200)
AT_SYMLINK_NOFOLLOW :: uintptr(0x100)
pollfd :: struct {
fd: c.int,
events: c.short,
revents: c.short,
}
sigset_t :: distinct u64
foreign libc {
@(link_name="__errno_location") __errno_location :: proc() -> ^c.int ---
@(link_name="getpagesize") _unix_getpagesize :: proc() -> c.int ---
@(link_name="get_nprocs") _unix_get_nprocs :: proc() -> c.int ---
@(link_name="fdopendir") _unix_fdopendir :: proc(fd: Handle) -> Dir ---
@(link_name="closedir") _unix_closedir :: proc(dirp: Dir) -> c.int ---
@(link_name="rewinddir") _unix_rewinddir :: proc(dirp: Dir) ---
@(link_name="readdir_r") _unix_readdir_r :: proc(dirp: Dir, entry: ^Dirent, result: ^^Dirent) -> c.int ---
@(link_name="malloc") _unix_malloc :: proc(size: c.size_t) -> rawptr ---
@(link_name="calloc") _unix_calloc :: proc(num, size: c.size_t) -> rawptr ---
@(link_name="free") _unix_free :: proc(ptr: rawptr) ---
@(link_name="realloc") _unix_realloc :: proc(ptr: rawptr, size: c.size_t) -> rawptr ---
@(link_name="execvp") _unix_execvp :: proc(path: cstring, argv: [^]cstring) -> int ---
@(link_name="getenv") _unix_getenv :: proc(cstring) -> cstring ---
@(link_name="putenv") _unix_putenv :: proc(cstring) -> c.int ---
@(link_name="setenv") _unix_setenv :: proc(key: cstring, value: cstring, overwrite: c.int) -> c.int ---
@(link_name="realpath") _unix_realpath :: proc(path: cstring, resolved_path: rawptr) -> rawptr ---
@(link_name="exit") _unix_exit :: proc(status: c.int) -> ! ---
}
foreign dl {
@(link_name="dlopen") _unix_dlopen :: proc(filename: cstring, flags: c.int) -> rawptr ---
@(link_name="dlsym") _unix_dlsym :: proc(handle: rawptr, symbol: cstring) -> rawptr ---
@(link_name="dlclose") _unix_dlclose :: proc(handle: rawptr) -> c.int ---
@(link_name="dlerror") _unix_dlerror :: proc() -> cstring ---
@(link_name="getifaddrs") _getifaddrs :: proc(ifap: ^^ifaddrs) -> (c.int) ---
@(link_name="freeifaddrs") _freeifaddrs :: proc(ifa: ^ifaddrs) ---
}
is_path_separator :: proc(r: rune) -> bool {
return r == '/'
}
// determine errno from syscall return value
@private
_get_errno :: proc(res: int) -> Errno {
if res < 0 && res > -4096 {
return Errno(-res)
}
return 0
}
// get errno from libc
get_last_error :: proc "contextless" () -> int {
return int(__errno_location()^)
}
personality :: proc(persona: u64) -> (Errno) {
res := unix.sys_personality(persona)
if res == -1 {
return _get_errno(res)
}
return ERROR_NONE
}
fork :: proc() -> (Pid, Errno) {
pid := unix.sys_fork()
if pid == -1 {
return -1, _get_errno(pid)
}
return Pid(pid), ERROR_NONE
}
execvp :: proc(path: string, args: []string) -> Errno {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
args_cstrs := make([]cstring, len(args) + 2, context.temp_allocator)
args_cstrs[0] = strings.clone_to_cstring(path, context.temp_allocator)
for i := 0; i < len(args); i += 1 {
args_cstrs[i+1] = strings.clone_to_cstring(args[i], context.temp_allocator)
}
_unix_execvp(path_cstr, raw_data(args_cstrs))
return Errno(get_last_error())
}
open :: proc(path: string, flags: int = O_RDONLY, mode: int = 0o000) -> (Handle, Errno) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cstr := strings.clone_to_cstring(path, context.temp_allocator)
handle := unix.sys_open(cstr, flags, uint(mode))
if handle < 0 {
return INVALID_HANDLE, _get_errno(handle)
}
return Handle(handle), ERROR_NONE
}
close :: proc(fd: Handle) -> Errno {
return _get_errno(unix.sys_close(int(fd)))
}
read :: proc(fd: Handle, data: []byte) -> (int, Errno) {
if len(data) == 0 {
return 0, ERROR_NONE
}
bytes_read := unix.sys_read(int(fd), raw_data(data), len(data))
if bytes_read < 0 {
return -1, _get_errno(bytes_read)
}
return bytes_read, ERROR_NONE
}
write :: proc(fd: Handle, data: []byte) -> (int, Errno) {
if len(data) == 0 {
return 0, ERROR_NONE
}
bytes_written := unix.sys_write(int(fd), raw_data(data), len(data))
if bytes_written < 0 {
return -1, _get_errno(bytes_written)
}
return bytes_written, ERROR_NONE
}
read_at :: proc(fd: Handle, data: []byte, offset: i64) -> (int, Errno) {
if len(data) == 0 {
return 0, ERROR_NONE
}
bytes_read := unix.sys_pread(int(fd), raw_data(data), len(data), offset)
if bytes_read < 0 {
return -1, _get_errno(bytes_read)
}
return bytes_read, ERROR_NONE
}
write_at :: proc(fd: Handle, data: []byte, offset: i64) -> (int, Errno) {
if len(data) == 0 {
return 0, ERROR_NONE
}
bytes_written := unix.sys_pwrite(int(fd), raw_data(data), uint(len(data)), offset)
if bytes_written < 0 {
return -1, _get_errno(bytes_written)
}
return bytes_written, ERROR_NONE
}
seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) {
res := unix.sys_lseek(int(fd), offset, whence)
if res < 0 {
return -1, _get_errno(int(res))
}
return i64(res), ERROR_NONE
}
file_size :: proc(fd: Handle) -> (i64, Errno) {
// deliberately uninitialized; the syscall fills this buffer for us
s: OS_Stat = ---
result := unix.sys_fstat(int(fd), rawptr(&s))
if result < 0 {
return 0, _get_errno(result)
}
return max(s.size, 0), ERROR_NONE
}
rename :: proc(old_path, new_path: string) -> Errno {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
old_path_cstr := strings.clone_to_cstring(old_path, context.temp_allocator)
new_path_cstr := strings.clone_to_cstring(new_path, context.temp_allocator)
return _get_errno(unix.sys_rename(old_path_cstr, new_path_cstr))
}
remove :: proc(path: string) -> Errno {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
return _get_errno(unix.sys_unlink(path_cstr))
}
make_directory :: proc(path: string, mode: u32 = 0o775) -> Errno {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
return _get_errno(unix.sys_mkdir(path_cstr, uint(mode)))
}
remove_directory :: proc(path: string) -> Errno {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
return _get_errno(unix.sys_rmdir(path_cstr))
}
is_file_handle :: proc(fd: Handle) -> bool {
s, err := _fstat(fd)
if err != ERROR_NONE {
return false
}
return S_ISREG(s.mode)
}
is_file_path :: proc(path: string, follow_links: bool = true) -> bool {
s: OS_Stat
err: Errno
if follow_links {
s, err = _stat(path)
} else {
s, err = _lstat(path)
}
if err != ERROR_NONE {
return false
}
return S_ISREG(s.mode)
}
is_dir_handle :: proc(fd: Handle) -> bool {
s, err := _fstat(fd)
if err != ERROR_NONE {
return false
}
return S_ISDIR(s.mode)
}
is_dir_path :: proc(path: string, follow_links: bool = true) -> bool {
s: OS_Stat
err: Errno
if follow_links {
s, err = _stat(path)
} else {
s, err = _lstat(path)
}
if err != ERROR_NONE {
return false
}
return S_ISDIR(s.mode)
}
is_file :: proc {is_file_path, is_file_handle}
is_dir :: proc {is_dir_path, is_dir_handle}
exists :: proc(path: string) -> bool {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cpath := strings.clone_to_cstring(path, context.temp_allocator)
res := unix.sys_access(cpath, O_RDONLY)
return res == 0
}
// 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
}
modified := s.modified.seconds * 1_000_000_000 + s.modified.nanoseconds
return File_Time(modified), ERROR_NONE
}
last_write_time_by_name :: proc(name: string) -> (File_Time, Errno) {
s, err := _stat(name)
if err != ERROR_NONE {
return 0, err
}
modified := s.modified.seconds * 1_000_000_000 + s.modified.nanoseconds
return File_Time(modified), ERROR_NONE
}
@private
_stat :: proc(path: string) -> (OS_Stat, Errno) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cstr := strings.clone_to_cstring(path, context.temp_allocator)
// deliberately uninitialized; the syscall fills this buffer for us
s: OS_Stat = ---
result := unix.sys_stat(cstr, &s)
if result < 0 {
return s, _get_errno(result)
}
return s, ERROR_NONE
}
@private
_lstat :: proc(path: string) -> (OS_Stat, Errno) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cstr := strings.clone_to_cstring(path, context.temp_allocator)
// deliberately uninitialized; the syscall fills this buffer for us
s: OS_Stat = ---
result := unix.sys_lstat(cstr, &s)
if result < 0 {
return s, _get_errno(result)
}
return s, ERROR_NONE
}
@private
_fstat :: proc(fd: Handle) -> (OS_Stat, Errno) {
// deliberately uninitialized; the syscall fills this buffer for us
s: OS_Stat = ---
result := unix.sys_fstat(int(fd), rawptr(&s))
if result < 0 {
return s, _get_errno(result)
}
return s, ERROR_NONE
}
@private
_fdopendir :: proc(fd: Handle) -> (Dir, Errno) {
dirp := _unix_fdopendir(fd)
if dirp == cast(Dir)nil {
return nil, Errno(get_last_error())
}
return dirp, ERROR_NONE
}
@private
_closedir :: proc(dirp: Dir) -> Errno {
rc := _unix_closedir(dirp)
if rc != 0 {
return Errno(get_last_error())
}
return ERROR_NONE
}
@private
_rewinddir :: proc(dirp: Dir) {
_unix_rewinddir(dirp)
}
@private
_readdir :: proc(dirp: Dir) -> (entry: Dirent, err: Errno, end_of_stream: bool) {
result: ^Dirent
rc := _unix_readdir_r(dirp, &entry, &result)
if rc != 0 {
err = Errno(get_last_error())
return
}
err = ERROR_NONE
if result == nil {
end_of_stream = true
return
}
end_of_stream = false
return
}
@private
_readlink :: proc(path: string) -> (string, Errno) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == context.allocator)
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
bufsz : uint = 256
buf := make([]byte, bufsz)
for {
rc := unix.sys_readlink(path_cstr, &(buf[0]), bufsz)
if rc < 0 {
delete(buf)
return "", _get_errno(rc)
} else if rc == int(bufsz) {
// NOTE(laleksic, 2021-01-21): Any cleaner way to resize the slice?
bufsz *= 2
delete(buf)
buf = make([]byte, bufsz)
} else {
return strings.string_from_ptr(&buf[0], rc), ERROR_NONE
}
}
}
absolute_path_from_handle :: proc(fd: Handle) -> (string, Errno) {
buf : [256]byte
fd_str := strconv.itoa( buf[:], cast(int)fd )
procfs_path := strings.concatenate( []string{ "/proc/self/fd/", fd_str } )
defer delete(procfs_path)
return _readlink(procfs_path)
}
absolute_path_from_relative :: proc(rel: string) -> (path: string, err: Errno) {
rel := rel
if rel == "" {
rel = "."
}
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == context.allocator)
rel_cstr := strings.clone_to_cstring(rel, context.temp_allocator)
path_ptr := _unix_realpath(rel_cstr, nil)
if path_ptr == nil {
return "", Errno(get_last_error())
}
defer _unix_free(path_ptr)
path_cstr := transmute(cstring)path_ptr
path = strings.clone( string(path_cstr) )
return path, ERROR_NONE
}
access :: proc(path: string, mask: int) -> (bool, Errno) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cstr := strings.clone_to_cstring(path, context.temp_allocator)
result := unix.sys_access(cstr, mask)
if result < 0 {
return false, _get_errno(result)
}
return true, ERROR_NONE
}
lookup_env :: proc(key: string, allocator := context.allocator) -> (value: string, found: bool) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == allocator)
path_str := strings.clone_to_cstring(key, context.temp_allocator)
// NOTE(tetra): Lifetime of 'cstr' is unclear, but _unix_free(cstr) segfaults.
cstr := _unix_getenv(path_str)
if cstr == nil {
return "", false
}
return strings.clone(string(cstr), allocator), true
}
get_env :: proc(key: string, allocator := context.allocator) -> (value: string) {
value, _ = lookup_env(key, allocator)
return
}
set_env :: proc(key, value: string) -> Errno {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
key_cstring := strings.clone_to_cstring(key, context.temp_allocator)
value_cstring := strings.clone_to_cstring(value, context.temp_allocator)
// NOTE(GoNZooo): `setenv` instead of `putenv` because it copies both key and value more commonly
res := _unix_setenv(key_cstring, value_cstring, 1)
if res < 0 {
return Errno(get_last_error())
}
return ERROR_NONE
}
unset_env :: proc(key: string) -> Errno {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
s := strings.clone_to_cstring(key, context.temp_allocator)
res := _unix_putenv(s)
if res < 0 {
return Errno(get_last_error())
}
return ERROR_NONE
}
get_current_directory :: proc() -> string {
// 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.
page_size := get_page_size()
buf := make([dynamic]u8, page_size)
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))
}
if _get_errno(res) != ERANGE {
delete(buf)
return ""
}
resize(&buf, len(buf)+page_size)
}
unreachable()
}
set_current_directory :: proc(path: string) -> (err: Errno) {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cstr := strings.clone_to_cstring(path, context.temp_allocator)
res := unix.sys_chdir(cstr)
if res < 0 {
return _get_errno(res)
}
return ERROR_NONE
}
exit :: proc "contextless" (code: int) -> ! {
runtime._cleanup_runtime_contextless()
_unix_exit(c.int(code))
}
current_thread_id :: proc "contextless" () -> int {
return unix.sys_gettid()
}
dlopen :: proc(filename: string, flags: int) -> rawptr {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cstr := strings.clone_to_cstring(filename, context.temp_allocator)
handle := _unix_dlopen(cstr, c.int(flags))
return handle
}
dlsym :: proc(handle: rawptr, symbol: string) -> rawptr {
assert(handle != nil)
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
cstr := strings.clone_to_cstring(symbol, context.temp_allocator)
proc_handle := _unix_dlsym(handle, cstr)
return proc_handle
}
dlclose :: 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 {
return page_size
}
page_size = int(_unix_getpagesize())
return page_size
}
@(private)
_processor_core_count :: proc() -> int {
return int(_unix_get_nprocs())
}
_alloc_command_line_arguments :: proc() -> []string {
res := make([]string, len(runtime.args__))
for arg, i in runtime.args__ {
res[i] = string(arg)
}
return res
}
socket :: proc(domain: int, type: int, protocol: int) -> (Socket, Errno) {
result := unix.sys_socket(domain, type, protocol)
if result < 0 {
return 0, _get_errno(result)
}
return Socket(result), ERROR_NONE
}
bind :: proc(sd: Socket, addr: ^SOCKADDR, len: socklen_t) -> (Errno) {
result := unix.sys_bind(int(sd), addr, len)
if result < 0 {
return _get_errno(result)
}
return ERROR_NONE
}
connect :: proc(sd: Socket, addr: ^SOCKADDR, len: socklen_t) -> (Errno) {
result := unix.sys_connect(int(sd), addr, len)
if result < 0 {
return _get_errno(result)
}
return ERROR_NONE
}
accept :: proc(sd: Socket, addr: ^SOCKADDR, len: rawptr) -> (Socket, Errno) {
result := unix.sys_accept(int(sd), rawptr(addr), len)
if result < 0 {
return 0, _get_errno(result)
}
return Socket(result), ERROR_NONE
}
listen :: proc(sd: Socket, backlog: int) -> (Errno) {
result := unix.sys_listen(int(sd), backlog)
if result < 0 {
return _get_errno(result)
}
return ERROR_NONE
}
setsockopt :: proc(sd: Socket, level: int, optname: int, optval: rawptr, optlen: socklen_t) -> (Errno) {
result := unix.sys_setsockopt(int(sd), level, optname, optval, optlen)
if result < 0 {
return _get_errno(result)
}
return ERROR_NONE
}
recvfrom :: proc(sd: Socket, data: []byte, flags: int, addr: ^SOCKADDR, addr_size: ^socklen_t) -> (u32, Errno) {
result := unix.sys_recvfrom(int(sd), raw_data(data), len(data), flags, addr, uintptr(addr_size))
if result < 0 {
return 0, _get_errno(int(result))
}
return u32(result), ERROR_NONE
}
recv :: proc(sd: Socket, data: []byte, flags: int) -> (u32, Errno) {
result := unix.sys_recvfrom(int(sd), raw_data(data), len(data), flags, nil, 0)
if result < 0 {
return 0, _get_errno(int(result))
}
return u32(result), ERROR_NONE
}
sendto :: proc(sd: Socket, data: []u8, flags: int, addr: ^SOCKADDR, addrlen: socklen_t) -> (u32, Errno) {
result := unix.sys_sendto(int(sd), raw_data(data), len(data), flags, addr, addrlen)
if result < 0 {
return 0, _get_errno(int(result))
}
return u32(result), ERROR_NONE
}
send :: proc(sd: Socket, data: []byte, flags: int) -> (u32, Errno) {
result := unix.sys_sendto(int(sd), raw_data(data), len(data), 0, nil, 0)
if result < 0 {
return 0, _get_errno(int(result))
}
return u32(result), ERROR_NONE
}
shutdown :: proc(sd: Socket, how: int) -> (Errno) {
result := unix.sys_shutdown(int(sd), how)
if result < 0 {
return _get_errno(result)
}
return ERROR_NONE
}
fcntl :: proc(fd: int, cmd: int, arg: int) -> (int, Errno) {
result := unix.sys_fcntl(fd, cmd, arg)
if result < 0 {
return 0, _get_errno(result)
}
return result, ERROR_NONE
}
poll :: proc(fds: []pollfd, timeout: int) -> (int, Errno) {
result := unix.sys_poll(raw_data(fds), uint(len(fds)), timeout)
if result < 0 {
return 0, _get_errno(result)
}
return result, ERROR_NONE
}
ppoll :: proc(fds: []pollfd, timeout: ^unix.timespec, sigmask: ^sigset_t) -> (int, Errno) {
result := unix.sys_ppoll(raw_data(fds), uint(len(fds)), timeout, sigmask, size_of(sigset_t))
if result < 0 {
return 0, _get_errno(result)
}
return result, ERROR_NONE
}
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