shithub: mc

ref: c1ad3758cdccebead9fafd8bdecf6caa5071fe19
dir: /libstd/syswrap+posixy.myr/

use sys
use "cstrconv.use"
use "option.use"
use "types.use"
use "errno.use"

pkg std =
	type fd		= sys.fd
	type pid	= sys.pid
	type fdopt	= sys.fdopt
	type whence	= sys.whence

	type sysinfo = struct
		system	: byte[:]
		version	: byte[:]
		release	: byte[:]
		arch	: byte[:]
		uname	: sys.utsname	/* storage */
	;;

	const Failmem	: byte#	= -1 castto(byte#)

	const Seekset	: whence = sys.Seekset	castto(whence)
	const Seekcur	: whence = sys.Seekcur	castto(whence)
	const Seekend	: whence = sys.Seekend	castto(whence)

	const Ordonly  	: fdopt = sys.Ordonly	castto(fdopt)
	const Owronly  	: fdopt = sys.Owronly	castto(fdopt)
	const Ordwr    	: fdopt = sys.Ordwr	castto(fdopt)
	const Ocreat   	: fdopt = sys.Ocreat	castto(fdopt)
	const Otrunc   	: fdopt = sys.Otrunc	castto(fdopt)
	const Oappend  	: fdopt = sys.Oappend	castto(fdopt)
	const Odir	: fdopt = sys.Odir	castto(fdopt)

	/* fd stuff */
	const open	: (path : byte[:], opts : fdopt -> fd)
	const openmode	: (path : byte[:], opts : fdopt, mode : int64 -> fd)
	const close	: (fd : fd -> int64)
	const creat	: (path : byte[:], mode : int64 -> fd)
	const read	: (fd : fd, buf : byte[:] -> size)
	const write	: (fd : fd, buf : byte[:] -> size)
	const pipe	: (fds : fd[2]# -> int64)
	const seek	: (fd : fd, delta : off, whence : whence -> off)
	const dup2	: (ofd : fd, nfd : fd -> fd)

	/* useful/portable bits of stat */
	const fmtime	: (f : byte[:]	-> option(time))
	const fsize	: (f : byte[:]	-> option(off))
	const fexists	: (f : byte[:]	-> bool)

	/* useful/portable bits of uname */
	const getsysinfo	: (si : sysinfo# -> void)

	/* path manipulation */
	const mkdir	: (path : byte[:], mode : int64 -> int64)
	const remove	: (path : byte[:] -> bool)
	const chdir	: (path : byte[:] -> bool)

	/* process stuff */
	const getpid	: ( -> pid)
	const suicide	: ( -> void)
	const fork	: (-> pid)
	const execv	: (cmd : byte[:], args : byte[:][:] -> int64)
	const execve	: (cmd : byte[:], args : byte[:][:], env : byte[:][:] -> int64)
	const waitpid	: (pid:pid, loc:int32#, opt : int64	-> int64)

	pkglocal const Canunmap	: bool = true
	pkglocal const getmem	: (sz : size -> byte#)
	pkglocal const freemem	: (p : byte#, sz : size -> void)
	pkglocal const curtime	: (-> time)
;;

/* fd stuff */
const open	= {path, opts;	-> sys.open(path, opts castto(sys.fdopt)) castto(fd)}
const openmode	= {path, opts, mode;	-> sys.openmode(path, opts castto(sys.fdopt), mode) castto(fd)}
const close	= {fd;		-> sys.close(fd castto(sys.fd))}
const creat	= {path, mode;	-> sys.creat(path, mode) castto(fd)}
const read	= {fd, buf;	-> sys.read(fd castto(sys.fd), buf) castto(size)}
const write	= {fd, buf;	-> sys.write(fd castto(sys.fd), buf) castto(size)}
const pipe	= {fds;		-> sys.pipe(fds castto(sys.fd[2]#))}
const seek	= {fd, delta, whence;	-> sys.lseek(fd castto(sys.fd), delta castto(sys.off), whence castto(sys.whence)) castto(off)}
const dup2	= {ofd, nfd;	-> sys.dup2(ofd castto(sys.fd), nfd castto(sys.fd)) castto(fd)}

/* path manipulation */
const mkdir	= {path, mode;	-> sys.mkdir(path, mode)}
const chdir	= {path;	-> sys.chdir(path) == 0}
const remove	= {path;	-> sys.unlink(path) == 0}

/* useful/portable bits of uname */
const getsysinfo = {si
	sys.uname(&si.uname)
	si.system = cstrconv(si.uname.system[:])
	si.version = cstrconv(si.uname.version[:])
	si.release = cstrconv(si.uname.release[:])
	si.arch = cstrconv(si.uname.machine[:])
}

/* process stuff */
const getpid	= {;		-> sys.getpid() castto(pid)}
const suicide	= {;		sys.kill(sys.getpid(), 6)}	/* kill self with sigabort */
const fork	= {;		-> sys.fork() castto(pid)}
const execv	= {cmd, args;	-> sys.execv(cmd, args)}
const execve	= {cmd, args, env;	-> sys.execve(cmd, args, env)}
const sleep	= {time;	sys.sleep(time)}

/* memory stuff */
const getmem	= {sz;		-> sys.mmap(0 castto(byte#), sz castto(sys.size), sys.Mprotrw, sys.Mpriv | sys.Manon, -1, 0)}
const freemem	= {p, sz;	sys.munmap(p, sz castto(sys.size))}
const curtime = {
	var tm, sec, nsec

	if sys.clock_gettime(`sys.Clockrealtime, &tm) == 0
		sec = tm.sec
		nsec = tm.nsec castto(uint64)
		-> (sec*1_000_000 + nsec/1000) castto(time)
	else
		-> -1
	;;
}

const fexists = {path
	var sb

	-> sys.stat(path, &sb) == 0
}

const fmtime = {path
	var sb
	var sec, nsec

	if sys.stat(path, &sb) == 0
		sec = sb.mtime.sec castto(time)
		nsec = sb.mtime.nsec castto(time)
		-> `Some sec*1000 + nsec/1_000_000
	else
		-> `None
	;;
}

const fsize = {path
	var sb

	if sys.stat(path, &sb) == 0
		-> `Some (sb.size castto(off))
	else
		-> `None
	;;
}