mirror of
https://github.com/Ed94/Odin.git
synced 2026-06-13 01:21:38 -07:00
Jeroen van Rijn
542 lines
16 KiB
Odin
542 lines
16 KiB
Odin
package os
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foreign import lib "system:c"
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import "base:runtime"
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import "core:c"
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import "core:c/libc"
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import "core:strings"
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import "core:sys/haiku"
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import "core:sys/posix"
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Handle :: i32
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Pid :: i32
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File_Time :: i64
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_Platform_Error :: haiku.Errno
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MAX_PATH :: haiku.PATH_MAX
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ENOSYS :: _Platform_Error(haiku.Errno.ENOSYS)
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INVALID_HANDLE :: ~Handle(0)
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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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pid_t :: haiku.pid_t
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off_t :: haiku.off_t
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dev_t :: haiku.dev_t
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ino_t :: haiku.ino_t
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mode_t :: haiku.mode_t
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nlink_t :: haiku.nlink_t
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uid_t :: haiku.uid_t
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gid_t :: haiku.gid_t
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blksize_t :: haiku.blksize_t
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blkcnt_t :: haiku.blkcnt_t
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time_t :: haiku.time_t
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Unix_File_Time :: struct {
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seconds: time_t,
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nanoseconds: c.long,
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}
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OS_Stat :: struct {
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device_id: dev_t, // device ID that this file resides on
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serial: ino_t, // this file's serial inode ID
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mode: mode_t, // file mode (rwx for user, group, etc)
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nlink: nlink_t, // number of hard links to this file
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uid: uid_t, // user ID of the file's owner
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gid: gid_t, // group ID of the file's group
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size: off_t, // file size, in bytes
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rdev: dev_t, // device type (not used)
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block_size: blksize_t, // optimal blocksize for I/O
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last_access: Unix_File_Time, // time of last access
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modified: Unix_File_Time, // time of last data modification
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status_change: Unix_File_Time, // time of last file status change
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birthtime: Unix_File_Time, // time of file creation
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type: u32, // attribute/index type
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blocks: blkcnt_t, // blocks allocated for file
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}
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/* file access modes for open() */
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O_RDONLY :: 0x0000 /* read only */
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O_WRONLY :: 0x0001 /* write only */
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O_RDWR :: 0x0002 /* read and write */
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O_ACCMODE :: 0x0003 /* mask to get the access modes above */
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O_RWMASK :: O_ACCMODE
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/* flags for open() */
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O_EXCL :: 0x0100 /* exclusive creat */
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O_CREATE :: 0x0200 /* create and open file */
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O_TRUNC :: 0x0400 /* open with truncation */
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O_NOCTTY :: 0x1000 /* don't make tty the controlling tty */
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O_NOTRAVERSE :: 0x2000 /* do not traverse leaf link */
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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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S_ISVTX :: 0o001000 // Save swapped text even after use
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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_ISTXT :: 0o1000 // Sticky bit
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S_ISLNK :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFLNK }
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S_ISREG :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFREG }
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S_ISDIR :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFDIR }
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S_ISCHR :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFCHR }
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S_ISBLK :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFBLK }
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S_ISFIFO :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFIFO }
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S_ISSOCK :: #force_inline proc(m: u32) -> bool { return (m & S_IFMT) == S_IFSOCK }
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__error :: libc.errno
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_unix_open :: posix.open
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foreign lib {
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@(link_name="fork") _unix_fork :: proc() -> pid_t ---
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@(link_name="getthrid") _unix_getthrid :: proc() -> int ---
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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="pread") _unix_pread :: proc(fd: Handle, buf: rawptr, size: c.size_t, offset: i64) -> 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="pwrite") _unix_pwrite :: proc(fd: Handle, buf: rawptr, size: c.size_t, offset: i64) -> c.ssize_t ---
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@(link_name="lseek") _unix_seek :: proc(fd: Handle, offset: off_t, whence: c.int) -> off_t ---
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@(link_name="stat") _unix_stat :: proc(path: cstring, sb: ^OS_Stat) -> c.int ---
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@(link_name="fstat") _unix_fstat :: proc(fd: Handle, sb: ^OS_Stat) -> c.int ---
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@(link_name="lstat") _unix_lstat :: proc(path: cstring, sb: ^OS_Stat) -> c.int ---
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@(link_name="readlink") _unix_readlink :: proc(path: cstring, buf: ^byte, bufsiz: c.size_t) -> c.ssize_t ---
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@(link_name="access") _unix_access :: proc(path: cstring, mask: c.int) -> c.int ---
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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(path: cstring) -> c.int ---
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@(link_name="rename") _unix_rename :: proc(old, new: cstring) -> c.int ---
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@(link_name="unlink") _unix_unlink :: proc(path: cstring) -> c.int ---
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@(link_name="rmdir") _unix_rmdir :: proc(path: cstring) -> c.int ---
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@(link_name="mkdir") _unix_mkdir :: proc(path: cstring, mode: mode_t) -> c.int ---
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@(link_name="fsync") _unix_fsync :: proc(fd: Handle) -> c.int ---
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@(link_name="getpagesize") _unix_getpagesize :: proc() -> c.int ---
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@(link_name="sysconf") _sysconf :: proc(name: c.int) -> c.long ---
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@(link_name="fdopendir") _unix_fdopendir :: proc(fd: Handle) -> Dir ---
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@(link_name="closedir") _unix_closedir :: proc(dirp: Dir) -> c.int ---
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@(link_name="rewinddir") _unix_rewinddir :: proc(dirp: Dir) ---
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@(link_name="readdir_r") _unix_readdir_r :: proc(dirp: Dir, entry: ^Dirent, result: ^^Dirent) -> c.int ---
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@(link_name="dup") _unix_dup :: proc(fd: Handle) -> Handle ---
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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="realpath") _unix_realpath :: proc(path: cstring, resolved_path: [^]byte = nil) -> cstring ---
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@(link_name="exit") _unix_exit :: proc(status: c.int) -> ! ---
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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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MAXNAMLEN :: haiku.NAME_MAX
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Dirent :: struct {
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dev: dev_t,
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pdef: dev_t,
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ino: ino_t,
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pino: ino_t,
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reclen: u16,
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name: [MAXNAMLEN + 1]byte, // name
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}
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Dir :: distinct rawptr // DIR*
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@(require_results)
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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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@(require_results, no_instrumentation)
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get_last_error :: proc "contextless" () -> Error {
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return Platform_Error(__error()^)
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}
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@(require_results)
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fork :: proc() -> (Pid, Error) {
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pid := _unix_fork()
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if pid == -1 {
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return Pid(-1), get_last_error()
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}
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return Pid(pid), nil
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}
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@(require_results)
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open :: proc(path: string, flags: int = O_RDONLY, mode: int = 0) -> (Handle, Error) {
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runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
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cstr := strings.clone_to_cstring(path, context.temp_allocator)
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handle := cast(Handle)_unix_open(cstr, transmute(posix.O_Flags)i32(flags), transmute(posix.mode_t)i32(mode))
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if handle == -1 {
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return INVALID_HANDLE, get_last_error()
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}
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return handle, nil
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}
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close :: proc(fd: Handle) -> Error {
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result := _unix_close(fd)
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if result == -1 {
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return get_last_error()
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}
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return nil
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}
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flush :: proc(fd: Handle) -> Error {
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result := _unix_fsync(fd)
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if result == -1 {
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return get_last_error()
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}
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return nil
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}
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// In practice a read/write call would probably never read/write these big buffers all at once,
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// which is why the number of bytes is returned and why there are procs that will call this in a
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// loop for you.
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// We set a max of 1GB to keep alignment and to be safe.
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@(private)
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MAX_RW :: 1 << 30
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read :: proc(fd: Handle, data: []byte) -> (int, Error) {
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to_read := min(c.size_t(len(data)), MAX_RW)
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bytes_read := _unix_read(fd, &data[0], to_read)
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if bytes_read == -1 {
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return -1, get_last_error()
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}
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return int(bytes_read), nil
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}
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write :: proc(fd: Handle, data: []byte) -> (int, Error) {
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if len(data) == 0 {
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return 0, nil
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}
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to_write := min(c.size_t(len(data)), MAX_RW)
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bytes_written := _unix_write(fd, &data[0], to_write)
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if bytes_written == -1 {
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return -1, get_last_error()
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}
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return int(bytes_written), nil
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}
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read_at :: proc(fd: Handle, data: []byte, offset: i64) -> (n: int, err: Error) {
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if len(data) == 0 {
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return 0, nil
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}
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to_read := min(uint(len(data)), MAX_RW)
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bytes_read := _unix_pread(fd, raw_data(data), to_read, offset)
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if bytes_read < 0 {
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return -1, get_last_error()
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}
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return bytes_read, nil
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}
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write_at :: proc(fd: Handle, data: []byte, offset: i64) -> (n: int, err: Error) {
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if len(data) == 0 {
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return 0, nil
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}
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to_write := min(uint(len(data)), MAX_RW)
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bytes_written := _unix_pwrite(fd, raw_data(data), to_write, offset)
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if bytes_written < 0 {
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return -1, get_last_error()
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}
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return bytes_written, nil
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}
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seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Error) {
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switch whence {
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case SEEK_SET, SEEK_CUR, SEEK_END:
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break
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case:
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return 0, .Invalid_Whence
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}
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res := _unix_seek(fd, offset, c.int(whence))
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if res == -1 {
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errno := get_last_error()
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switch errno {
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case .BAD_VALUE:
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return 0, .Invalid_Offset
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}
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return 0, errno
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}
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return res, nil
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}
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@(require_results)
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file_size :: proc(fd: Handle) -> (i64, Error) {
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s, err := _fstat(fd)
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if err != nil {
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return -1, err
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}
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return s.size, nil
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}
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// "Argv" arguments converted to Odin strings
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args := _alloc_command_line_arguments()
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@(private, require_results)
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_alloc_command_line_arguments :: proc() -> []string {
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res := make([]string, len(runtime.args__))
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for arg, i in runtime.args__ {
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res[i] = string(arg)
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}
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return res
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}
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@(private, fini)
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_delete_command_line_arguments :: proc() {
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delete(args)
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}
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@(private, require_results, no_sanitize_memory)
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_stat :: proc(path: string) -> (OS_Stat, Error) {
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runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
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cstr := strings.clone_to_cstring(path, context.temp_allocator)
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// deliberately uninitialized
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s: OS_Stat = ---
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res := _unix_stat(cstr, &s)
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if res == -1 {
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return s, get_last_error()
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}
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return s, nil
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}
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@(private, require_results, no_sanitize_memory)
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_lstat :: proc(path: string) -> (OS_Stat, Error) {
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runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
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cstr := strings.clone_to_cstring(path, context.temp_allocator)
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// deliberately uninitialized
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s: OS_Stat = ---
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res := _unix_lstat(cstr, &s)
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if res == -1 {
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return s, get_last_error()
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}
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return s, nil
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}
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@(private, require_results, no_sanitize_memory)
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_fstat :: proc(fd: Handle) -> (OS_Stat, Error) {
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// deliberately uninitialized
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s: OS_Stat = ---
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res := _unix_fstat(fd, &s)
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if res == -1 {
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return s, get_last_error()
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}
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return s, nil
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}
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@(private)
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_fdopendir :: proc(fd: Handle) -> (Dir, Error) {
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dirp := _unix_fdopendir(fd)
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if dirp == cast(Dir)nil {
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return nil, get_last_error()
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}
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return dirp, nil
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}
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@(private)
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_closedir :: proc(dirp: Dir) -> Error {
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rc := _unix_closedir(dirp)
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if rc != 0 {
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return get_last_error()
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}
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return nil
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}
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@(private)
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_rewinddir :: proc(dirp: Dir) {
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_unix_rewinddir(dirp)
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}
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@(private, require_results)
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_readdir :: proc(dirp: Dir) -> (entry: Dirent, err: Error, end_of_stream: bool) {
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result: ^Dirent
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rc := _unix_readdir_r(dirp, &entry, &result)
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if rc != 0 {
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err = get_last_error()
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return
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}
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if result == nil {
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end_of_stream = true
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return
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}
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return
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}
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@(private, require_results)
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_readlink :: proc(path: string) -> (string, Error) {
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runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == context.allocator)
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path_cstr := strings.clone_to_cstring(path, context.temp_allocator)
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bufsz : uint = MAX_PATH
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buf := make([]byte, MAX_PATH)
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for {
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rc := _unix_readlink(path_cstr, &(buf[0]), bufsz)
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if rc == -1 {
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delete(buf)
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return "", get_last_error()
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} else if rc == int(bufsz) {
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bufsz += MAX_PATH
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delete(buf)
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buf = make([]byte, bufsz)
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} else {
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return strings.string_from_ptr(&buf[0], rc), nil
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}
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}
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}
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@(require_results)
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absolute_path_from_handle :: proc(fd: Handle) -> (string, Error) {
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return "", Error(ENOSYS)
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}
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@(require_results)
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absolute_path_from_relative :: proc(rel: string, allocator := context.allocator) -> (path: string, err: Error) {
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rel := rel
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if rel == "" {
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rel = "."
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}
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runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD(ignore = context.temp_allocator == context.allocator)
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rel_cstr := strings.clone_to_cstring(rel, context.temp_allocator)
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path_ptr := _unix_realpath(rel_cstr, nil)
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if path_ptr == nil {
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return "", get_last_error()
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}
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defer _unix_free(rawptr(path_ptr))
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path_cstr := cstring(path_ptr)
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return strings.clone(string(path_cstr), allocator)
|
|
}
|
|
|
|
access :: proc(path: string, mask: int) -> (bool, Error) {
|
|
runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
|
|
cstr := strings.clone_to_cstring(path, context.temp_allocator)
|
|
res := _unix_access(cstr, c.int(mask))
|
|
if res == -1 {
|
|
return false, get_last_error()
|
|
}
|
|
return true, nil
|
|
}
|
|
|
|
@(require_results)
|
|
lookup_env_alloc :: 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)
|
|
lookup_env_buffer :: proc(buf: []u8, key: string) -> (value: string, err: Error) {
|
|
if len(key) + 1 > len(buf) {
|
|
return "", .Buffer_Full
|
|
} else {
|
|
copy(buf, key)
|
|
}
|
|
|
|
if value = string(_unix_getenv(cstring(raw_data(buf)))); value == "" {
|
|
return "", .Env_Var_Not_Found
|
|
} else {
|
|
if len(value) > len(buf) {
|
|
return "", .Buffer_Full
|
|
} else {
|
|
copy(buf, value)
|
|
return string(buf[:len(value)]), nil
|
|
}
|
|
}
|
|
}
|
|
lookup_env :: proc{lookup_env_alloc, lookup_env_buffer}
|
|
|
|
@(require_results)
|
|
get_env_alloc :: proc(key: string, allocator := context.allocator) -> (value: string) {
|
|
value, _ = lookup_env(key, allocator)
|
|
return
|
|
}
|
|
|
|
@(require_results)
|
|
get_env_buf :: proc(buf: []u8, key: string) -> (value: string) {
|
|
value, _ = lookup_env(buf, key)
|
|
return
|
|
}
|
|
get_env :: proc{get_env_alloc, get_env_buf}
|
|
|
|
|
|
@(private, require_results)
|
|
_processor_core_count :: proc() -> int {
|
|
info: haiku.system_info
|
|
haiku.get_system_info(&info)
|
|
return int(info.cpu_count)
|
|
}
|
|
|
|
exit :: proc "contextless" (code: int) -> ! {
|
|
runtime._cleanup_runtime_contextless()
|
|
_unix_exit(i32(code))
|
|
}
|
|
|
|
@(require_results)
|
|
current_thread_id :: proc "contextless" () -> int {
|
|
return int(haiku.find_thread(nil))
|
|
}
|
|
|
|
@(private, require_results)
|
|
_dup :: proc(fd: Handle) -> (Handle, Error) {
|
|
dup := _unix_dup(fd)
|
|
if dup == -1 {
|
|
return INVALID_HANDLE, get_last_error()
|
|
}
|
|
return dup, nil
|
|
}
|