make syscall use strings for file names

tweak os to adjust
move StringToBytes into syscall, at least for now

this program still works:

	package main

	import os "os"

	func main() {
		os.Stdout.WriteString("hello, world\n");
		a, b := os.NewFD(77).WriteString("no way");
		os.Stdout.WriteString(b.String() + "\n");
	}

R=rsc
DELTA=263  (59 added, 176 deleted, 28 changed)
OCL=15153
CL=15153

1 files changed, 26 insertions, 8 deletions

diff --git a/src/syscall/file_amd64_linux.go b/src/syscall/file_amd64_linux.go
index d00222a26..dc99d7de3 100644
--- a/src/syscall/file_amd64_linux.go
+++ b/src/syscall/file_amd64_linux.go
@@ -66,15 +66,25 @@ const (
 	O_TRUNC = 0x200;
 )
 
-export func open(name *byte, mode int64, flags int64) (ret int64, errno int64) {
+const NameBufsize = 512
+
+export func open(name string, mode int64, perm int64) (ret int64, errno int64) {
+	var namebuf [NameBufsize]byte;
+	if !StringToBytes(&namebuf, name) {
+		return -1, syscall.ENAMETOOLONG
+	}
 	const SYSOPEN = 2;
-	r1, r2, err := syscall.Syscall(SYSOPEN, AddrToInt(name), mode, flags);
+	r1, r2, err := syscall.Syscall(SYSOPEN, AddrToInt(&namebuf[0]), mode, perm);
 	return r1, err;
 }
 
-export func creat(name *byte, mode int64) (ret int64, errno int64) {
+export func creat(name string, perm int64) (ret int64, errno int64) {
+	var namebuf [NameBufsize]byte;
+	if !StringToBytes(&namebuf, name) {
+		return -1, syscall.ENAMETOOLONG
+	}
 	const SYSOPEN = 2;
-	r1, r2, err := syscall.Syscall(SYSOPEN, AddrToInt(name), mode, O_CREAT|O_WRONLY|O_TRUNC);
+	r1, r2, err := syscall.Syscall(SYSOPEN, AddrToInt(&namebuf[0]),  O_CREAT|O_WRONLY|O_TRUNC, perm);
 	return r1, err;
 }
 
@@ -108,9 +118,13 @@ export func pipe(fds *[2]int64) (ret int64, errno int64) {
 	return 0, 0;
 }
 
-export func stat(name *byte, buf *Stat) (ret int64, errno int64) {
+export func stat(name string, buf *Stat) (ret int64, errno int64) {
+	var namebuf [NameBufsize]byte;
+	if !StringToBytes(&namebuf, name) {
+		return -1, syscall.ENAMETOOLONG
+	}
 	const SYSSTAT = 4;
-	r1, r2, err := syscall.Syscall(SYSSTAT, AddrToInt(name), StatToInt(buf), 0);
+	r1, r2, err := syscall.Syscall(SYSSTAT, AddrToInt(&namebuf[0]), StatToInt(buf), 0);
 	return r1, err;
 }
 
@@ -126,8 +140,12 @@ export func fstat(fd int64, buf *Stat) (ret int64, errno int64) {
 	return r1, err;
 }
 
-export func unlink(name *byte) (ret int64, errno int64) {
+export func unlink(name string) (ret int64, errno int64) {
+	var namebuf [NameBufsize]byte;
+	if !StringToBytes(&namebuf, name) {
+		return -1, syscall.ENAMETOOLONG
+	}
 	const SYSUNLINK = 87;
-	r1, r2, err := syscall.Syscall(SYSUNLINK, AddrToInt(name), 0, 0);
+	r1, r2, err := syscall.Syscall(SYSUNLINK, AddrToInt(&namebuf[0]), 0, 0);
 	return r1, err;
 }