mirror of
https://github.com/odin-lang/Odin.git
synced 2025-12-29 09:24:33 +00:00
508 lines
17 KiB
Odin
508 lines
17 KiB
Odin
package os
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foreign import dl "system:dl"
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foreign import libc "system:c"
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import "core:runtime"
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import "core:strings"
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import "core:c"
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OS :: "linux";
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Handle :: distinct i32;
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File_Time :: distinct u64;
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Errno :: distinct i32;
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Syscall :: distinct int;
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INVALID_HANDLE :: ~Handle(0);
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ERROR_NONE: Errno : 0;
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EPERM: Errno : 1;
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ENOENT: Errno : 2;
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ESRCH: Errno : 3;
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EINTR: Errno : 4;
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EIO: Errno : 5;
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ENXIO: Errno : 6;
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EBADF: Errno : 9;
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EAGAIN: Errno : 11;
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ENOMEM: Errno : 12;
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EACCES: Errno : 13;
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EFAULT: Errno : 14;
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EEXIST: Errno : 17;
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ENODEV: Errno : 19;
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ENOTDIR: Errno : 20;
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EISDIR: Errno : 21;
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EINVAL: Errno : 22;
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ENFILE: Errno : 23;
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EMFILE: Errno : 24;
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ETXTBSY: Errno : 26;
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EFBIG: Errno : 27;
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ENOSPC: Errno : 28;
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ESPIPE: Errno : 29;
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EROFS: Errno : 30;
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EPIPE: Errno : 32;
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ERANGE: Errno : 34; /* Result too large */
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EDEADLK: Errno : 35; /* Resource deadlock would occur */
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ENAMETOOLONG: Errno : 36; /* File name too long */
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ENOLCK: Errno : 37; /* No record locks available */
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ENOSYS: Errno : 38; /* Invalid system call number */
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ENOTEMPTY: Errno : 39; /* Directory not empty */
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ELOOP: Errno : 40; /* Too many symbolic links encountered */
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EWOULDBLOCK: Errno : EAGAIN; /* Operation would block */
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ENOMSG: Errno : 42; /* No message of desired type */
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EIDRM: Errno : 43; /* Identifier removed */
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ECHRNG: Errno : 44; /* Channel number out of range */
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EL2NSYNC: Errno : 45; /* Level 2 not synchronized */
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EL3HLT: Errno : 46; /* Level 3 halted */
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EL3RST: Errno : 47; /* Level 3 reset */
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ELNRNG: Errno : 48; /* Link number out of range */
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EUNATCH: Errno : 49; /* Protocol driver not attached */
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ENOCSI: Errno : 50; /* No CSI structure available */
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EL2HLT: Errno : 51; /* Level 2 halted */
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EBADE: Errno : 52; /* Invalid exchange */
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EBADR: Errno : 53; /* Invalid request descriptor */
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EXFULL: Errno : 54; /* Exchange full */
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ENOANO: Errno : 55; /* No anode */
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EBADRQC: Errno : 56; /* Invalid request code */
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EBADSLT: Errno : 57; /* Invalid slot */
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EDEADLOCK: Errno : EDEADLK;
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EBFONT: Errno : 59; /* Bad font file format */
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ENOSTR: Errno : 60; /* Device not a stream */
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ENODATA: Errno : 61; /* No data available */
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ETIME: Errno : 62; /* Timer expired */
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ENOSR: Errno : 63; /* Out of streams resources */
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ENONET: Errno : 64; /* Machine is not on the network */
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ENOPKG: Errno : 65; /* Package not installed */
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EREMOTE: Errno : 66; /* Object is remote */
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ENOLINK: Errno : 67; /* Link has been severed */
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EADV: Errno : 68; /* Advertise error */
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ESRMNT: Errno : 69; /* Srmount error */
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ECOMM: Errno : 70; /* Communication error on send */
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EPROTO: Errno : 71; /* Protocol error */
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EMULTIHOP: Errno : 72; /* Multihop attempted */
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EDOTDOT: Errno : 73; /* RFS specific error */
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EBADMSG: Errno : 74; /* Not a data message */
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EOVERFLOW: Errno : 75; /* Value too large for defined data type */
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ENOTUNIQ: Errno : 76; /* Name not unique on network */
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EBADFD: Errno : 77; /* File descriptor in bad state */
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EREMCHG: Errno : 78; /* Remote address changed */
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ELIBACC: Errno : 79; /* Can not access a needed shared library */
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ELIBBAD: Errno : 80; /* Accessing a corrupted shared library */
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ELIBSCN: Errno : 81; /* .lib section in a.out corrupted */
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ELIBMAX: Errno : 82; /* Attempting to link in too many shared libraries */
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ELIBEXEC: Errno : 83; /* Cannot exec a shared library directly */
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EILSEQ: Errno : 84; /* Illegal byte sequence */
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ERESTART: Errno : 85; /* Interrupted system call should be restarted */
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ESTRPIPE: Errno : 86; /* Streams pipe error */
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EUSERS: Errno : 87; /* Too many users */
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ENOTSOCK: Errno : 88; /* Socket operation on non-socket */
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EDESTADDRREQ: Errno : 89; /* Destination address required */
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EMSGSIZE: Errno : 90; /* Message too long */
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EPROTOTYPE: Errno : 91; /* Protocol wrong type for socket */
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ENOPROTOOPT: Errno : 92; /* Protocol not available */
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EPROTONOSUPPORT:Errno : 93; /* Protocol not supported */
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ESOCKTNOSUPPORT:Errno : 94; /* Socket type not supported */
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EOPNOTSUPP: Errno : 95; /* Operation not supported on transport endpoint */
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EPFNOSUPPORT: Errno : 96; /* Protocol family not supported */
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EAFNOSUPPORT: Errno : 97; /* Address family not supported by protocol */
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EADDRINUSE: Errno : 98; /* Address already in use */
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EADDRNOTAVAIL: Errno : 99; /* Cannot assign requested address */
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ENETDOWN: Errno : 100; /* Network is down */
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ENETUNREACH: Errno : 101; /* Network is unreachable */
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ENETRESET: Errno : 102; /* Network dropped connection because of reset */
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ECONNABORTED: Errno : 103; /* Software caused connection abort */
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ECONNRESET: Errno : 104; /* Connection reset by peer */
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ENOBUFS: Errno : 105; /* No buffer space available */
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EISCONN: Errno : 106; /* Transport endpoint is already connected */
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ENOTCONN: Errno : 107; /* Transport endpoint is not connected */
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ESHUTDOWN: Errno : 108; /* Cannot send after transport endpoint shutdown */
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ETOOMANYREFS: Errno : 109; /* Too many references: cannot splice */
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ETIMEDOUT: Errno : 110; /* Connection timed out */
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ECONNREFUSED: Errno : 111; /* Connection refused */
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EHOSTDOWN: Errno : 112; /* Host is down */
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EHOSTUNREACH: Errno : 113; /* No route to host */
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EALREADY: Errno : 114; /* Operation already in progress */
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EINPROGRESS: Errno : 115; /* Operation now in progress */
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ESTALE: Errno : 116; /* Stale file handle */
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EUCLEAN: Errno : 117; /* Structure needs cleaning */
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ENOTNAM: Errno : 118; /* Not a XENIX named type file */
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ENAVAIL: Errno : 119; /* No XENIX semaphores available */
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EISNAM: Errno : 120; /* Is a named type file */
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EREMOTEIO: Errno : 121; /* Remote I/O error */
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EDQUOT: Errno : 122; /* Quota exceeded */
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ENOMEDIUM: Errno : 123; /* No medium found */
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EMEDIUMTYPE: Errno : 124; /* Wrong medium type */
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ECANCELED: Errno : 125; /* Operation Canceled */
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ENOKEY: Errno : 126; /* Required key not available */
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EKEYEXPIRED: Errno : 127; /* Key has expired */
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EKEYREVOKED: Errno : 128; /* Key has been revoked */
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EKEYREJECTED: Errno : 129; /* Key was rejected by service */
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/* for robust mutexes */
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EOWNERDEAD: Errno : 130; /* Owner died */
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ENOTRECOVERABLE: Errno : 131; /* State not recoverable */
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ERFKILL: Errno : 132; /* Operation not possible due to RF-kill */
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EHWPOISON: Errno : 133; /* Memory page has hardware error */
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O_RDONLY :: 0x00000;
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O_WRONLY :: 0x00001;
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O_RDWR :: 0x00002;
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O_CREATE :: 0x00040;
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O_EXCL :: 0x00080;
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O_NOCTTY :: 0x00100;
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O_TRUNC :: 0x00200;
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O_NONBLOCK :: 0x00800;
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O_APPEND :: 0x00400;
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O_SYNC :: 0x01000;
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O_ASYNC :: 0x02000;
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O_CLOEXEC :: 0x80000;
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SEEK_SET :: 0;
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SEEK_CUR :: 1;
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SEEK_END :: 2;
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SEEK_DATA :: 3;
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SEEK_HOLE :: 4;
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SEEK_MAX :: SEEK_HOLE;
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// NOTE(zangent): These are OS specific!
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// Do not mix these up!
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RTLD_LAZY :: 0x001;
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RTLD_NOW :: 0x002;
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RTLD_BINDING_MASK :: 0x3;
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RTLD_GLOBAL :: 0x100;
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// "Argv" arguments converted to Odin strings
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args := _alloc_command_line_arguments();
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_File_Time :: struct {
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seconds: i64,
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nanoseconds: i64,
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}
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Stat :: struct {
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device_id: u64, // ID of device containing file
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serial: u64, // File serial number
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nlink: u64, // Number of hard links
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mode: u32, // Mode of the file
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uid: u32, // User ID of the file's owner
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gid: u32, // Group ID of the file's group
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_padding: i32, // 32 bits of padding
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rdev: u64, // Device ID, if device
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size: i64, // Size of the file, in bytes
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block_size: i64, // Optimal bllocksize for I/O
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blocks: i64, // Number of 512-byte blocks allocated
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last_access: File_Time, // Time of last access
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status_change: File_Time, // Time of last status change
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modified: File_Time, // Time of last modification
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_reserve1,
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_reserve2,
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_reserve3: i64,
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};
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// File type
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S_IFMT :: 0o170000; // Type of file mask
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S_IFIFO :: 0o010000; // Named pipe (fifo)
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S_IFCHR :: 0o020000; // Character special
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S_IFDIR :: 0o040000; // Directory
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S_IFBLK :: 0o060000; // Block special
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S_IFREG :: 0o100000; // Regular
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S_IFLNK :: 0o120000; // Symbolic link
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S_IFSOCK :: 0o140000; // Socket
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// File mode
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// Read, write, execute/search by owner
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S_IRWXU :: 0o0700; // RWX mask for owner
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S_IRUSR :: 0o0400; // R for owner
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S_IWUSR :: 0o0200; // W for owner
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S_IXUSR :: 0o0100; // X for owner
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// Read, write, execute/search by group
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S_IRWXG :: 0o0070; // RWX mask for group
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S_IRGRP :: 0o0040; // R for group
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S_IWGRP :: 0o0020; // W for group
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S_IXGRP :: 0o0010; // X for group
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// Read, write, execute/search by others
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S_IRWXO :: 0o0007; // RWX mask for other
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S_IROTH :: 0o0004; // R for other
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S_IWOTH :: 0o0002; // W for other
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S_IXOTH :: 0o0001; // X for other
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S_ISUID :: 0o4000; // Set user id on execution
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S_ISGID :: 0o2000; // Set group id on execution
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S_ISVTX :: 0o1000; // Directory restrcted delete
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S_ISLNK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFLNK;
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S_ISREG :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFREG;
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S_ISDIR :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFDIR;
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S_ISCHR :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFCHR;
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S_ISBLK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFBLK;
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S_ISFIFO :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFIFO;
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S_ISSOCK :: inline proc(m: u32) -> bool do return (m & S_IFMT) == S_IFSOCK;
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F_OK :: 0; // Test for file existance
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X_OK :: 1; // Test for execute permission
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W_OK :: 2; // Test for write permission
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R_OK :: 4; // Test for read permission
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SYS_GETTID: Syscall : 186;
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foreign libc {
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@(link_name="__errno_location") __errno_location :: proc() -> ^int ---;
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@(link_name="syscall") syscall :: proc(number: Syscall, #c_vararg args: ..any) -> int ---;
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@(link_name="open") _unix_open :: proc(path: cstring, flags: c.int, mode: c.int) -> Handle ---;
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@(link_name="close") _unix_close :: proc(fd: Handle) -> c.int ---;
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@(link_name="read") _unix_read :: proc(fd: Handle, buf: rawptr, size: c.size_t) -> c.ssize_t ---;
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@(link_name="write") _unix_write :: proc(fd: Handle, buf: rawptr, size: c.size_t) -> c.ssize_t ---;
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@(link_name="lseek64") _unix_seek :: proc(fd: Handle, offset: i64, whence: c.int) -> i64 ---;
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@(link_name="gettid") _unix_gettid :: proc() -> u64 ---;
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@(link_name="getpagesize") _unix_getpagesize :: proc() -> c.int ---;
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@(link_name="stat64") _unix_stat :: proc(path: cstring, stat: ^Stat) -> c.int ---;
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@(link_name="fstat") _unix_fstat :: proc(fd: Handle, stat: ^Stat) -> c.int ---;
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@(link_name="access") _unix_access :: proc(path: cstring, mask: c.int) -> c.int ---;
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@(link_name="malloc") _unix_malloc :: proc(size: c.size_t) -> rawptr ---;
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@(link_name="calloc") _unix_calloc :: proc(num, size: c.size_t) -> rawptr ---;
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@(link_name="free") _unix_free :: proc(ptr: rawptr) ---;
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@(link_name="realloc") _unix_realloc :: proc(ptr: rawptr, size: c.size_t) -> rawptr ---;
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@(link_name="getenv") _unix_getenv :: proc(cstring) -> cstring ---;
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@(link_name="getcwd") _unix_getcwd :: proc(buf: cstring, len: c.size_t) -> cstring ---;
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@(link_name="chdir") _unix_chdir :: proc(buf: cstring) -> c.int ---;
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@(link_name="exit") _unix_exit :: proc(status: c.int) -> ! ---;
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}
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foreign dl {
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@(link_name="dlopen") _unix_dlopen :: proc(filename: cstring, flags: c.int) -> rawptr ---;
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@(link_name="dlsym") _unix_dlsym :: proc(handle: rawptr, symbol: cstring) -> rawptr ---;
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@(link_name="dlclose") _unix_dlclose :: proc(handle: rawptr) -> c.int ---;
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@(link_name="dlerror") _unix_dlerror :: proc() -> cstring ---;
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}
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is_path_separator :: proc(r: rune) -> bool {
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return r == '/';
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}
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get_last_error :: proc() -> int {
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return __errno_location()^;
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}
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open :: proc(path: string, flags: int = O_RDONLY, mode: int = 0) -> (Handle, Errno) {
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cstr := strings.clone_to_cstring(path);
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handle := _unix_open(cstr, c.int(flags), c.int(mode));
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delete(cstr);
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if handle == -1 {
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return INVALID_HANDLE, Errno(get_last_error());
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}
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return handle, ERROR_NONE;
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}
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close :: proc(fd: Handle) -> Errno {
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result := _unix_close(fd);
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if result == -1 {
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return Errno(get_last_error());
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}
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return ERROR_NONE;
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}
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read :: proc(fd: Handle, data: []byte) -> (int, Errno) {
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bytes_read := _unix_read(fd, &data[0], c.size_t(len(data)));
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if bytes_read == -1 {
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return -1, Errno(get_last_error());
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}
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return int(bytes_read), ERROR_NONE;
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}
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write :: proc(fd: Handle, data: []byte) -> (int, Errno) {
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if len(data) == 0 {
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return 0, ERROR_NONE;
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}
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bytes_written := _unix_write(fd, &data[0], c.size_t(len(data)));
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if bytes_written == -1 {
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return -1, Errno(get_last_error());
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}
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return int(bytes_written), ERROR_NONE;
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}
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seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) {
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res := _unix_seek(fd, offset, c.int(whence));
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if res == -1 {
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return -1, Errno(get_last_error());
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}
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return res, ERROR_NONE;
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}
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file_size :: proc(fd: Handle) -> (i64, Errno) {
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s, err := fstat(fd);
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if err != ERROR_NONE {
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return -1, err;
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}
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return s.size, ERROR_NONE;
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}
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// NOTE(bill): Uses startup to initialize it
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stdin: Handle = 0;
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stdout: Handle = 1;
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stderr: Handle = 2;
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/* TODO(zangent): Implement these!
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last_write_time :: proc(fd: Handle) -> File_Time {}
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last_write_time_by_name :: proc(name: string) -> File_Time {}
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*/
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last_write_time :: proc(fd: Handle) -> (File_Time, Errno) {
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s, err := fstat(fd);
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if err != ERROR_NONE {
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return 0, err;
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}
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return File_Time(s.modified), ERROR_NONE;
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}
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last_write_time_by_name :: proc(name: string) -> (File_Time, Errno) {
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s, err := stat(name);
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if err != ERROR_NONE {
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return 0, err;
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}
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return File_Time(s.modified), ERROR_NONE;
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}
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stat :: inline proc(path: string) -> (Stat, Errno) {
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cstr := strings.clone_to_cstring(path);
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defer delete(cstr);
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s: Stat;
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result := _unix_stat(cstr, &s);
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if result == -1 {
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return s, Errno(get_last_error());
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}
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return s, ERROR_NONE;
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}
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fstat :: inline proc(fd: Handle) -> (Stat, Errno) {
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s: Stat;
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result := _unix_fstat(fd, &s);
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if result == -1 {
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return s, Errno(get_last_error());
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}
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return s, ERROR_NONE;
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}
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access :: inline proc(path: string, mask: int) -> (bool, Errno) {
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cstr := strings.clone_to_cstring(path);
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defer delete(cstr);
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result := _unix_access(cstr, c.int(mask));
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if result == -1 {
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return false, Errno(get_last_error());
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}
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return true, ERROR_NONE;
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}
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heap_alloc :: proc(size: int) -> rawptr {
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assert(size >= 0);
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return _unix_calloc(1, c.size_t(size));
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}
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heap_resize :: proc(ptr: rawptr, new_size: int) -> rawptr {
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return _unix_realloc(ptr, c.size_t(new_size));
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}
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heap_free :: proc(ptr: rawptr) {
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_unix_free(ptr);
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}
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getenv :: proc(name: string) -> (string, bool) {
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path_str := strings.clone_to_cstring(name);
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defer delete(path_str);
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|
cstr := _unix_getenv(path_str);
|
|
if cstr == nil {
|
|
return "", false;
|
|
}
|
|
return string(cstr), true;
|
|
}
|
|
|
|
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 {
|
|
cwd := _unix_getcwd(cstring(#no_bounds_check &buf[0]), c.size_t(len(buf)));
|
|
if cwd != nil {
|
|
return string(cwd);
|
|
}
|
|
if Errno(get_last_error()) != ERANGE {
|
|
return "";
|
|
}
|
|
resize(&buf, len(buf)+page_size);
|
|
}
|
|
unreachable();
|
|
return "";
|
|
}
|
|
|
|
set_current_directory :: proc(path: string) -> (err: Errno) {
|
|
cstr := strings.clone_to_cstring(path, context.temp_allocator);
|
|
res := _unix_chdir(cstr);
|
|
if res == -1 do return Errno(get_last_error());
|
|
return ERROR_NONE;
|
|
}
|
|
|
|
exit :: proc(code: int) -> ! {
|
|
_unix_exit(c.int(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, c.int(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;
|
|
}
|