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os_linux.odin
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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"
// 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"
import linux "core:sys/linux"
Handle :: distinct i32
Pid :: distinct i32
File_Time :: distinct u64
Socket :: distinct int
INVALID_HANDLE :: ~Handle(0)
_Platform_Error :: linux.Errno
EPERM :: Platform_Error.EPERM
ENOENT :: Platform_Error.ENOENT
ESRCH :: Platform_Error.ESRCH
EINTR :: Platform_Error.EINTR
EIO :: Platform_Error.EIO
ENXIO :: Platform_Error.ENXIO
EBADF :: Platform_Error.EBADF
EAGAIN :: Platform_Error.EAGAIN
ENOMEM :: Platform_Error.ENOMEM
EACCES :: Platform_Error.EACCES
EFAULT :: Platform_Error.EFAULT
EEXIST :: Platform_Error.EEXIST
ENODEV :: Platform_Error.ENODEV
ENOTDIR :: Platform_Error.ENOTDIR
EISDIR :: Platform_Error.EISDIR
EINVAL :: Platform_Error.EINVAL
ENFILE :: Platform_Error.ENFILE
EMFILE :: Platform_Error.EMFILE
ETXTBSY :: Platform_Error.ETXTBSY
EFBIG :: Platform_Error.EFBIG
ENOSPC :: Platform_Error.ENOSPC
ESPIPE :: Platform_Error.ESPIPE
EROFS :: Platform_Error.EROFS
EPIPE :: Platform_Error.EPIPE
ERANGE :: Platform_Error.ERANGE /* Result too large */
EDEADLK :: Platform_Error.EDEADLK /* Resource deadlock would occur */
ENAMETOOLONG :: Platform_Error.ENAMETOOLONG /* File name too long */
ENOLCK :: Platform_Error.ENOLCK /* No record locks available */
ENOSYS :: Platform_Error.ENOSYS /* Invalid system call number */
ENOTEMPTY :: Platform_Error.ENOTEMPTY /* Directory not empty */
ELOOP :: Platform_Error.ELOOP /* Too many symbolic links encountered */
EWOULDBLOCK :: Platform_Error.EWOULDBLOCK /* Operation would block */
ENOMSG :: Platform_Error.ENOMSG /* No message of desired type */
EIDRM :: Platform_Error.EIDRM /* Identifier removed */
ECHRNG :: Platform_Error.ECHRNG /* Channel number out of range */
EL2NSYNC :: Platform_Error.EL2NSYNC /* Level 2 not synchronized */
EL3HLT :: Platform_Error.EL3HLT /* Level 3 halted */
EL3RST :: Platform_Error.EL3RST /* Level 3 reset */
ELNRNG :: Platform_Error.ELNRNG /* Link number out of range */
EUNATCH :: Platform_Error.EUNATCH /* Protocol driver not attached */
ENOCSI :: Platform_Error.ENOCSI /* No CSI structure available */
EL2HLT :: Platform_Error.EL2HLT /* Level 2 halted */
EBADE :: Platform_Error.EBADE /* Invalid exchange */
EBADR :: Platform_Error.EBADR /* Invalid request descriptor */
EXFULL :: Platform_Error.EXFULL /* Exchange full */
ENOANO :: Platform_Error.ENOANO /* No anode */
EBADRQC :: Platform_Error.EBADRQC /* Invalid request code */
EBADSLT :: Platform_Error.EBADSLT /* Invalid slot */
EDEADLOCK :: Platform_Error.EDEADLOCK
EBFONT :: Platform_Error.EBFONT /* Bad font file format */
ENOSTR :: Platform_Error.ENOSTR /* Device not a stream */
ENODATA :: Platform_Error.ENODATA /* No data available */
ETIME :: Platform_Error.ETIME /* Timer expired */
ENOSR :: Platform_Error.ENOSR /* Out of streams resources */
ENONET :: Platform_Error.ENONET /* Machine is not on the network */
ENOPKG :: Platform_Error.ENOPKG /* Package not installed */
EREMOTE :: Platform_Error.EREMOTE /* Object is remote */
ENOLINK :: Platform_Error.ENOLINK /* Link has been severed */
EADV :: Platform_Error.EADV /* Advertise error */
ESRMNT :: Platform_Error.ESRMNT /* Srmount error */
ECOMM :: Platform_Error.ECOMM /* Communication error on send */
EPROTO :: Platform_Error.EPROTO /* Protocol error */
EMULTIHOP :: Platform_Error.EMULTIHOP /* Multihop attempted */
EDOTDOT :: Platform_Error.EDOTDOT /* RFS specific error */
EBADMSG :: Platform_Error.EBADMSG /* Not a data message */
EOVERFLOW :: Platform_Error.EOVERFLOW /* Value too large for defined data type */
ENOTUNIQ :: Platform_Error.ENOTUNIQ /* Name not unique on network */
EBADFD :: Platform_Error.EBADFD /* File descriptor in bad state */
EREMCHG :: Platform_Error.EREMCHG /* Remote address changed */
ELIBACC :: Platform_Error.ELIBACC /* Can not access a needed shared library */
ELIBBAD :: Platform_Error.ELIBBAD /* Accessing a corrupted shared library */
ELIBSCN :: Platform_Error.ELIBSCN /* .lib section in a.out corrupted */
ELIBMAX :: Platform_Error.ELIBMAX /* Attempting to link in too many shared libraries */
ELIBEXEC :: Platform_Error.ELIBEXEC /* Cannot exec a shared library directly */
EILSEQ :: Platform_Error.EILSEQ /* Illegal byte sequence */
ERESTART :: Platform_Error.ERESTART /* Interrupted system call should be restarted */
ESTRPIPE :: Platform_Error.ESTRPIPE /* Streams pipe error */
EUSERS :: Platform_Error.EUSERS /* Too many users */
ENOTSOCK :: Platform_Error.ENOTSOCK /* Socket operation on non-socket */
EDESTADDRREQ :: Platform_Error.EDESTADDRREQ /* Destination address required */
EMSGSIZE :: Platform_Error.EMSGSIZE /* Message too long */
EPROTOTYPE :: Platform_Error.EPROTOTYPE /* Protocol wrong type for socket */
ENOPROTOOPT :: Platform_Error.ENOPROTOOPT /* Protocol not available */
EPROTONOSUPPOR :: Platform_Error.EPROTONOSUPPORT /* Protocol not supported */
ESOCKTNOSUPPOR :: Platform_Error.ESOCKTNOSUPPORT /* Socket type not supported */
EOPNOTSUPP :: Platform_Error.EOPNOTSUPP /* Operation not supported on transport endpoint */
EPFNOSUPPORT :: Platform_Error.EPFNOSUPPORT /* Protocol family not supported */
EAFNOSUPPORT :: Platform_Error.EAFNOSUPPORT /* Address family not supported by protocol */
EADDRINUSE :: Platform_Error.EADDRINUSE /* Address already in use */
EADDRNOTAVAIL :: Platform_Error.EADDRNOTAVAIL /* Cannot assign requested address */
ENETDOWN :: Platform_Error.ENETDOWN /* Network is down */
ENETUNREACH :: Platform_Error.ENETUNREACH /* Network is unreachable */
ENETRESET :: Platform_Error.ENETRESET /* Network dropped connection because of reset */
ECONNABORTED :: Platform_Error.ECONNABORTED /* Software caused connection abort */
ECONNRESET :: Platform_Error.ECONNRESET /* Connection reset by peer */
ENOBUFS :: Platform_Error.ENOBUFS /* No buffer space available */
EISCONN :: Platform_Error.EISCONN /* Transport endpoint is already connected */
ENOTCONN :: Platform_Error.ENOTCONN /* Transport endpoint is not connected */
ESHUTDOWN :: Platform_Error.ESHUTDOWN /* Cannot send after transport endpoint shutdown */
ETOOMANYREFS :: Platform_Error.ETOOMANYREFS /* Too many references: cannot splice */
ETIMEDOUT :: Platform_Error.ETIMEDOUT /* Connection timed out */
ECONNREFUSED :: Platform_Error.ECONNREFUSED /* Connection refused */
EHOSTDOWN :: Platform_Error.EHOSTDOWN /* Host is down */
EHOSTUNREACH :: Platform_Error.EHOSTUNREACH /* No route to host */
EALREADY :: Platform_Error.EALREADY /* Operation already in progress */
EINPROGRESS :: Platform_Error.EINPROGRESS /* Operation now in progress */
ESTALE :: Platform_Error.ESTALE /* Stale file handle */
EUCLEAN :: Platform_Error.EUCLEAN /* Structure needs cleaning */
ENOTNAM :: Platform_Error.ENOTNAM /* Not a XENIX named type file */
ENAVAIL :: Platform_Error.ENAVAIL /* No XENIX semaphores available */
EISNAM :: Platform_Error.EISNAM /* Is a named type file */
EREMOTEIO :: Platform_Error.EREMOTEIO /* Remote I/O error */
EDQUOT :: Platform_Error.EDQUOT /* Quota exceeded */
ENOMEDIUM :: Platform_Error.ENOMEDIUM /* No medium found */
EMEDIUMTYPE :: Platform_Error.EMEDIUMTYPE /* Wrong medium type */
ECANCELED :: Platform_Error.ECANCELED /* Operation Canceled */
ENOKEY :: Platform_Error.ENOKEY /* Required key not available */
EKEYEXPIRED :: Platform_Error.EKEYEXPIRED /* Key has expired */
EKEYREVOKED :: Platform_Error.EKEYREVOKED /* Key has been revoked */
EKEYREJECTED :: Platform_Error.EKEYREJECTED /* Key was rejected by service */
/* for robust mutexes */
EOWNERDEAD :: Platform_Error.EOWNERDEAD /* Owner died */
ENOTRECOVERABLE :: Platform_Error.ENOTRECOVERABLE /* State not recoverable */
ERFKILL :: Platform_Error.ERFKILL /* Operation not possible due to RF-kill */
EHWPOISON :: Platform_Error.EHWPOISON /* 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 :: 0x0001
RTLD_NOW :: 0x0002
RTLD_BINDING_MASK :: 0x0003
RTLD_GLOBAL :: 0x0100
RTLD_NOLOAD :: 0x0004
RTLD_DEEPBIND :: 0x0008
RTLD_NODELETE :: 0x1000
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 || ODIN_ARCH == .riscv64 {
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
@(require_results) S_ISLNK :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFLNK }
@(require_results) S_ISREG :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFREG }
@(require_results) S_ISDIR :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFDIR }
@(require_results) S_ISCHR :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFCHR }
@(require_results) S_ISBLK :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFBLK }
@(require_results) S_ISFIFO :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFIFO }
@(require_results) 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) -> c.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: [^]byte = nil) -> cstring ---
@(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) ---
}
@(require_results)
is_path_separator :: proc(r: rune) -> bool {
return r == '/'
}
// determine errno from syscall return value
@(private, require_results)
_get_errno :: proc(res: int) -> Error {
if res < 0 && res > -4096 {
return Platform_Error(-res)
}
return nil
}
// get errno from libc
@(require_results, no_instrumentation)
get_last_error :: proc "contextless" () -> Error {
err := Platform_Error(__errno_location()^)
#partial switch err {
case .NONE:
return nil
case .EPERM:
return .Permission_Denied
case .EEXIST:
return .Exist
case .ENOENT:
return .Not_Exist
}
return err
}
personality :: proc(persona: u64) -> Error {
res := unix.sys_personality(persona)
if res == -1 {
return _get_errno(res)
}
return nil
}
@(require_results)
fork :: proc() -> (Pid, Error) {
pid := unix.sys_fork()
if pid == -1 {
return -1, _get_errno(pid)
}
return Pid(pid), nil
}
execvp :: proc(path: string, args: []string) -> Error {
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 get_last_error()
}
@(require_results)
open :: proc(path: string, flags: int = O_RDONLY, mode: int = 0o000) -> (Handle, Error) {
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), nil
}
close :: proc(fd: Handle) -> Error {
return _get_errno(unix.sys_close(int(fd)))
}
flush :: proc(fd: Handle) -> Error {
return _get_errno(unix.sys_fsync(int(fd)))
}
// If you read or write more than `SSIZE_MAX` bytes, result is implementation defined (probably an error).
// `SSIZE_MAX` is also implementation defined but usually the max of a `ssize_t` which is `max(int)` in Odin.
// In practice a read/write call would probably never read/write these big buffers all at once,
// which is why the number of bytes is returned and why there are procs that will call this in a
// loop for you.
// We set a max of 1GB to keep alignment and to be safe.
@(private)
MAX_RW :: 1 << 30
read :: proc(fd: Handle, data: []byte) -> (int, Error) {
if len(data) == 0 {
return 0, nil
}
to_read := min(uint(len(data)), MAX_RW)
bytes_read := unix.sys_read(int(fd), raw_data(data), to_read)
if bytes_read < 0 {
return -1, _get_errno(bytes_read)
}
return bytes_read, nil
}
write :: proc(fd: Handle, data: []byte) -> (int, Error) {
if len(data) == 0 {
return 0, nil
}
to_write := min(uint(len(data)), MAX_RW)
bytes_written := unix.sys_write(int(fd), raw_data(data), to_write)
if bytes_written < 0 {
return -1, _get_errno(bytes_written)
}
return bytes_written, nil
}
read_at :: proc(fd: Handle, data: []byte, offset: i64) -> (int, Error) {
if len(data) == 0 {
return 0, nil
}
to_read := min(uint(len(data)), MAX_RW)
bytes_read := unix.sys_pread(int(fd), raw_data(data), to_read, offset)
if bytes_read < 0 {
return -1, _get_errno(bytes_read)
}
return bytes_read, nil
}
write_at :: proc(fd: Handle, data: []byte, offset: i64) -> (int, Error) {
if len(data) == 0 {
return 0, nil
}
to_write := min(uint(len(data)), MAX_RW)
bytes_written := unix.sys_pwrite(int(fd), raw_data(data), to_write, offset)
if bytes_written < 0 {
return -1, _get_errno(bytes_written)
}
return bytes_written, nil
}
seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Error) {
switch whence {
case SEEK_SET, SEEK_CUR, SEEK_END:
break
case:
return 0, .Invalid_Whence
}
res := unix.sys_lseek(int(fd), offset, whence)
if res < 0 {
errno := _get_errno(int(res))
switch errno {
case .EINVAL:
return 0, .Invalid_Offset
}
return 0, errno
}
return i64(res), nil
}
@(require_results)
file_size :: proc(fd: Handle) -> (i64, Error) {
// 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), nil
}
rename :: proc(old_path, new_path: string) -> Error {
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) -> Error {
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) -> Error {
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) -> Error {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
return _get_errno(unix.sys_rmdir(path_cstr))
}
@(require_results)
is_file_handle :: proc(fd: Handle) -> bool {
s, err := _fstat(fd)
if err != nil {
return false
}
return S_ISREG(s.mode)
}
@(require_results)
is_file_path :: proc(path: string, follow_links: bool = true) -> bool {
s: OS_Stat
err: Error
if follow_links {
s, err = _stat(path)
} else {
s, err = _lstat(path)
}
if err != nil {
return false
}
return S_ISREG(s.mode)
}
@(require_results)
is_dir_handle :: proc(fd: Handle) -> bool {
s, err := _fstat(fd)
if err != nil {
return false
}
return S_ISDIR(s.mode)
}
@(require_results)
is_dir_path :: proc(path: string, follow_links: bool = true) -> bool {
s: OS_Stat
err: Error
if follow_links {
s, err = _stat(path)
} else {
s, err = _lstat(path)
}
if err != nil {
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}
@(require_results)
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 {}
*/
@(require_results)
last_write_time :: proc(fd: Handle) -> (time: File_Time, err: Error) {
s := _fstat(fd) or_return
modified := s.modified.seconds * 1_000_000_000 + s.modified.nanoseconds
return File_Time(modified), nil
}
@(require_results)
last_write_time_by_name :: proc(name: string) -> (time: File_Time, err: Error) {
s := _stat(name) or_return
modified := s.modified.seconds * 1_000_000_000 + s.modified.nanoseconds
return File_Time(modified), nil
}
@(private, require_results)
_stat :: proc(path: string) -> (OS_Stat, Error) {
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, nil
}
@(private, require_results)
_lstat :: proc(path: string) -> (OS_Stat, Error) {
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, nil
}
@(private, require_results)
_fstat :: proc(fd: Handle) -> (OS_Stat, Error) {
// 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, nil
}
@(private, require_results)
_fdopendir :: proc(fd: Handle) -> (Dir, Error) {
dirp := _unix_fdopendir(fd)
if dirp == cast(Dir)nil {
return nil, get_last_error()
}
return dirp, nil
}
@(private)
_closedir :: proc(dirp: Dir) -> Error {
rc := _unix_closedir(dirp)
if rc != 0 {
return get_last_error()
}
return nil
}
@(private)
_rewinddir :: proc(dirp: Dir) {
_unix_rewinddir(dirp)
}
@(private, require_results)
_readdir :: proc(dirp: Dir) -> (entry: Dirent, err: Error, end_of_stream: bool) {
result: ^Dirent
rc := _unix_readdir_r(dirp, &entry, &result)
if rc != 0 {
err = get_last_error()
return
}
err = nil
if result == nil {
end_of_stream = true
return
}
end_of_stream = false
return
}
@(private, require_results)
_readlink :: proc(path: string) -> (string, Error) {
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), nil
}
}
}
@(private, require_results)
_dup :: proc(fd: Handle) -> (Handle, Error) {
dup, err := linux.dup(linux.Fd(fd))
return Handle(dup), err
}
@(require_results)
absolute_path_from_handle :: proc(fd: Handle) -> (string, Error) {
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)
}
@(require_results)
absolute_path_from_relative :: proc(rel: string, allocator := context.allocator) -> (path: string, err: Error) {
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 "", get_last_error()
}
defer _unix_free(rawptr(path_ptr))
return strings.clone(string(path_ptr), allocator)
}
access :: proc(path: string, mask: int) -> (bool, Error) {
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, nil
}
@(require_results)
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
}
@(require_results)
get_env :: proc(key: string, allocator := context.allocator) -> (value: string) {
value, _ = lookup_env(key, allocator)
return
}
set_env :: proc(key, value: string) -> Error {
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 get_last_error()
}
return nil
}
unset_env :: proc(key: string) -> Error {
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
s := strings.clone_to_cstring(key, context.temp_allocator)
res := _unix_putenv(s)
if res < 0 {
return get_last_error()
}
return nil
}
@(require_results)
get_current_directory :: proc(allocator := context.allocator) -> string {
context.allocator = allocator
// 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))