diff --git a/README.md b/README.md
index 17ab0d0..0dec895 100644
--- a/README.md
+++ b/README.md
@@ -14,16 +14,16 @@ func main[] : I64
     let answer: I64 = math.abs(math.urandom()) % 100
 
     while true
-        io.print("Guess a number: ")
+        io.println("Guess a number: ")
         let guess: I64 = io.read_stdin() |> str.trim() |> str.parse_i64()
 
         if guess == answer
-            io.print("You win!")
+            io.println("You win!")
             break
         else if guess < answer
-            io.print("Too low!")
+            io.println("Too low!")
         else
-            io.print("Too high!")
+            io.println("Too high!")
 ```
 
 ## Quickstart
diff --git a/examples/brainfuck.zr b/examples/brainfuck.zr
index 6cfacd4..042bc72 100644
--- a/examples/brainfuck.zr
+++ b/examples/brainfuck.zr
@@ -20,7 +20,7 @@ func main[] : I64
         else if op == '-'
             str.set(memory, p, memory[p]-1)
         else if op == '.'
-            c.printf("%c", memory[p])
+            io.print_char(memory[p])
         else if op == ','
             str.set(memory, p, c.getchar())
         else if op == '['
diff --git a/examples/euler1.zr b/examples/euler1.zr
index 4a5d1ef..29b5ae3 100644
--- a/examples/euler1.zr
+++ b/examples/euler1.zr
@@ -4,4 +4,4 @@ func main[] : I64
     for i in 0..1000
         if i % 5 == 0 | i % 3 == 0
             sum = sum + i
-    io.print_i64(sum)
\ No newline at end of file
+    io.println_i64(sum)
\ No newline at end of file
diff --git a/examples/euler10.zr b/examples/euler10.zr
index 33f02ba..ba5a99c 100644
--- a/examples/euler10.zr
+++ b/examples/euler10.zr
@@ -4,4 +4,4 @@ func main[] : I64
     for i in 0..2000000
         if math.is_prime(i)
             sum = sum + i
-    io.print_i64(sum)
\ No newline at end of file
+    io.println_i64(sum)
\ No newline at end of file
diff --git a/examples/euler12.zr b/examples/euler12.zr
index 5dbb9bb..4155085 100644
--- a/examples/euler12.zr
+++ b/examples/euler12.zr
@@ -16,6 +16,6 @@ func main[] : I64
     while true
         n = n + i
         if num_divisors(n) > 500
-            io.print_i64(n)
+            io.println_i64(n)
             break
         i = i + 1
\ No newline at end of file
diff --git a/examples/euler13.zr b/examples/euler13.zr
index f38ca93..72b5129 100644
--- a/examples/euler13.zr
+++ b/examples/euler13.zr
@@ -3,4 +3,4 @@ func main[] : I64
     37107287533 + 46376937677 + 74324986199 + 91942213363 + 23067588207 + 89261670696 + 28112879812 + 44274228917 + 47451445736 + 70386486105 + 62176457141 + 64906352462 + 92575867718 + 58203565325 + 80181199384 + 35398664372 + 86515506006 + 71693888707 + 54370070576 + 53282654108 + 36123272525 + 45876576172 + 17423706905 + 81142660418 + 51934325451 + 62467221648 + 15732444386 + 55037687525 + 18336384825 + 80386287592 + 78182833757 + 16726320100 + 48403098129 + 87086987551 + 59959406895 + 69793950679 + 41052684708 + 65378607361 + 35829035317 + 94953759765 + 88902802571 + 25267680276 + 36270218540 + 24074486908 + 91430288197 + 34413065578 + 23053081172 + 11487696932 + 63783299490 + 67720186971 + 95548255300 + 76085327132 + 37774242535 + 23701913275 + 29798860272 + 18495701454 + 38298203783 + 34829543829 + 40957953066 + 29746152185 + 41698116222 + 62467957194 + 23189706772 + 86188088225 + 11306739708 + 82959174767 + 97623331044 + 42846280183 + 55121603546 + 32238195734 + 75506164965 + 62177842752 + 32924185707 + 99518671430 + 73267460800 + 76841822524 + 97142617910 + 87783646182 + 10848802521 + 71329612474 + 62184073572 + 66627891981 + 60661826293 + 85786944089 + 66024396409 + 64913982680 + 16730939319 + 94809377245 + 78639167021 + 15368713711 + 40789923115 + 44889911501 + 41503128880 + 81234880673 + 82616570773 + 22918802058 + 77158542502 + 72107838435 + 20849603980 + 53503534226
     |> str.from_i64()
     |> str.substr(0, 10)
-    |> io.print()
\ No newline at end of file
+    |> io.println()
\ No newline at end of file
diff --git a/examples/euler14.zr b/examples/euler14.zr
index 11a43c1..3c99a67 100644
--- a/examples/euler14.zr
+++ b/examples/euler14.zr
@@ -19,4 +19,4 @@ func main[] : I64
         if seq > max
             max = seq
             max_index = i
-    io.print_i64(max_index)
\ No newline at end of file
+    io.println_i64(max_index)
\ No newline at end of file
diff --git a/examples/euler15.zr b/examples/euler15.zr
index f9ce07b..81dc850 100644
--- a/examples/euler15.zr
+++ b/examples/euler15.zr
@@ -6,4 +6,4 @@ func main[] : I64
     for i in 1..r+1
         out = out * (n - (r - i)) / i
 
-    io.print_i64(out)
\ No newline at end of file
+    io.println_i64(out)
\ No newline at end of file
diff --git a/examples/euler2.zr b/examples/euler2.zr
index 9714c64..192f592 100644
--- a/examples/euler2.zr
+++ b/examples/euler2.zr
@@ -10,4 +10,4 @@ func main[] : I64
         b = a + b
         a = temp
 
-    io.print_i64(sum)
\ No newline at end of file
+    io.println_i64(sum)
\ No newline at end of file
diff --git a/examples/euler3.zr b/examples/euler3.zr
index d3ce76b..60dba7a 100644
--- a/examples/euler3.zr
+++ b/examples/euler3.zr
@@ -8,4 +8,4 @@ func main[] : I64
         else
             f = f + 1
 
-    io.print_i64(n)
\ No newline at end of file
+    io.println_i64(n)
\ No newline at end of file
diff --git a/examples/euler4.zr b/examples/euler4.zr
index fa00314..572fd48 100644
--- a/examples/euler4.zr
+++ b/examples/euler4.zr
@@ -10,4 +10,4 @@ func main[] : I64
                     out = a * b
                 mem.free(s)
                 mem.free(s_rev)
-    io.print_i64(out)
\ No newline at end of file
+    io.println_i64(out)
\ No newline at end of file
diff --git a/examples/euler5.zr b/examples/euler5.zr
index d46e565..c90c1b3 100644
--- a/examples/euler5.zr
+++ b/examples/euler5.zr
@@ -3,4 +3,4 @@ func main[] : I64
 
     for i in 1..21
         out = math.lcm(out, i)
-    io.print_i64(out)
\ No newline at end of file
+    io.println_i64(out)
\ No newline at end of file
diff --git a/examples/euler6.zr b/examples/euler6.zr
index 98adbf1..763dfa0 100644
--- a/examples/euler6.zr
+++ b/examples/euler6.zr
@@ -8,4 +8,4 @@ func main[] : I64
         square_of_sum = square_of_sum + i
     square_of_sum = square_of_sum * square_of_sum
 
-    io.print_i64(square_of_sum - sum_of_squares)
\ No newline at end of file
+    io.println_i64(square_of_sum - sum_of_squares)
\ No newline at end of file
diff --git a/examples/euler7.zr b/examples/euler7.zr
index db51b02..e8d7ae3 100644
--- a/examples/euler7.zr
+++ b/examples/euler7.zr
@@ -6,6 +6,6 @@ func main[] : I64
         if math.is_prime(i)
             found = found + 1
             if found == 10001
-                io.print_i64(i)
+                io.println_i64(i)
                 break
         i = i + 1
\ No newline at end of file
diff --git a/examples/euler8.zr b/examples/euler8.zr
index eb349c9..8a6da75 100644
--- a/examples/euler8.zr
+++ b/examples/euler8.zr
@@ -11,4 +11,4 @@ func main[] : I64
             j = j + 1
         if s > out
             out = s
-    io.print_i64(out)
\ No newline at end of file
+    io.println_i64(out)
\ No newline at end of file
diff --git a/examples/euler9.zr b/examples/euler9.zr
index f120000..7e2114a 100644
--- a/examples/euler9.zr
+++ b/examples/euler9.zr
@@ -3,5 +3,5 @@ func main[] : I64
         for b in 1..1000
             let c: I64 = 1000 - b - a
             if a * a + b * b == c * c
-                io.print_i64(a * b * c)
+                io.println_i64(a * b * c)
                 return 0
\ No newline at end of file
diff --git a/examples/fib.zr b/examples/fib.zr
index 0840eab..c159307 100644
--- a/examples/fib.zr
+++ b/examples/fib.zr
@@ -3,7 +3,7 @@ func main[] : I64
     let b: I64 = 1
 
     while a < 100000
-        io.print_i64(a)
+        io.println_i64(a)
         let temp: I64 = b
         b = a + b
         a = temp
\ No newline at end of file
diff --git a/examples/guess_number.zr b/examples/guess_number.zr
index 089e1e3..cb41ac5 100644
--- a/examples/guess_number.zr
+++ b/examples/guess_number.zr
@@ -2,13 +2,13 @@ func main[] : I64
     let answer: I64 = math.abs(math.urandom()) % 100
 
     while true
-        io.print("Guess a number: ")
+        io.println("Guess a number: ")
         let guess: I64 = io.read_stdin() |> str.trim() |> str.parse_i64()
 
         if guess == answer
-            io.print("You win!")
+            io.println("You win!")
             break
         else if guess < answer
-            io.print("Too low!")
+            io.println("Too low!")
         else
-            io.print("Too high!")
\ No newline at end of file
+            io.println("Too high!")
\ No newline at end of file
diff --git a/examples/hello.zr b/examples/hello.zr
index baad92e..7c4cd17 100644
--- a/examples/hello.zr
+++ b/examples/hello.zr
@@ -1,2 +1,2 @@
 func main[] : I64
-    io.print("Hello, World!")
\ No newline at end of file
+    io.println("Hello, World!")
\ No newline at end of file
diff --git a/examples/quicksort.zr b/examples/quicksort.zr
index 294a09e..afad6f2 100644
--- a/examples/quicksort.zr
+++ b/examples/quicksort.zr
@@ -4,12 +4,12 @@ func main[] : I64
         array.push(arr, math.abs(math.urandom() % 1000))
 
     for i in 0..array.size(arr)
-        io.print_i64(array.nth(arr, i))
-    io.print("------------")
+        io.println_i64(array.nth(arr, i))
+    io.println("------------")
 
     alg.quicksort(arr)
 
     for i in 0..array.size(arr)
-        io.print_i64(array.nth(arr, i))
+        io.println_i64(array.nth(arr, i))
 
     array.free(arr)
\ No newline at end of file
diff --git a/examples/raylib.zr b/examples/raylib.zr
index fe07bdb..c7b7330 100644
--- a/examples/raylib.zr
+++ b/examples/raylib.zr
@@ -1,4 +1,4 @@
-// musl doesnt like dlopen, needs to be compiled with -m -C="/usr/local/lib/libraylib.a -lm"
+// needs to be compiled with -m -C="/usr/local/lib/libraylib.a -lm"
 
 func main[] : I64
     extern InitWindow
@@ -11,11 +11,6 @@ func main[] : I64
     extern DrawRectangle
     extern IsKeyDown
 
-    let KEY_W: I64 = 87
-    let KEY_S: I64 = 83
-    let KEY_A: I64 = 65
-    let KEY_D: I64 = 68
-
     let x: I64 = 200
     let y: I64 = 200
 
@@ -23,13 +18,13 @@ func main[] : I64
     SetTargetFPS(60)
 
     while !WindowShouldClose()
-        if IsKeyDown(KEY_W) & 255
+        if IsKeyDown(87) & 255 // W
             y = y - 10
-        if IsKeyDown(KEY_S) & 255
+        if IsKeyDown(83) & 255 // S
             y = y + 10
-        if IsKeyDown(KEY_A) & 255
+        if IsKeyDown(65) & 255 // A
             x = x - 10
-        if IsKeyDown(KEY_D) & 255
+        if IsKeyDown(68) & 255 // D
             x = x + 10
 
         BeginDrawing()
diff --git a/examples/rule110.zr b/examples/rule110.zr
index ee97661..3495052 100644
--- a/examples/rule110.zr
+++ b/examples/rule110.zr
@@ -18,10 +18,10 @@ func rule110_step[state: Array] : Array
 func print_state[state: Array]: Void
     for i in 0..array.size(state)
         if array.nth(state, i)
-            c.putchar('#')
+            io.print_char('#')
         else
-            c.putchar(' ')
-    io.print("")
+            io.print_char(' ')
+    io.println("")
 
 func main[] : I64
     let SIZE: I64 = 60
diff --git a/examples/x11.zr b/examples/x11.zr
index 1c2a02b..38dbc7c 100644
--- a/examples/x11.zr
+++ b/examples/x11.zr
@@ -1,20 +1,18 @@
-// musl doesnt like dlopen, needs to be compiled with -m
+// needs to be compiled with -m -C="-lX11"
 
 func main[] : I64
-    let x11: Ptr = c.dlopen("libX11.so", 2)
-
-    let XOpenDisplay: Ptr = c.dlsym(x11, "XOpenDisplay")
-    let XDefaultRootWindow: Ptr = c.dlsym(x11, "XDefaultRootWindow")
-    let XCreateSimpleWindow: Ptr = c.dlsym(x11, "XCreateSimpleWindow")
-    let XMapWindow: Ptr = c.dlsym(x11, "XMapWindow")
-    let XSelectInput: Ptr = c.dlsym(x11, "XSelectInput")
-    let XNextEvent: Ptr = c.dlsym(x11, "XNextEvent")
-    let XBlackPixel: Ptr = c.dlsym(x11, "XBlackPixel")
-    let XWhitePixel: Ptr = c.dlsym(x11, "XWhitePixel")
-    let XSetForeground: Ptr = c.dlsym(x11, "XSetForeground")
-    let XCreateGC: Ptr = c.dlsym(x11, "XCreateGC")
-    let XDefaultScreen: Ptr = c.dlsym(x11, "XDefaultScreen")
-    let XDrawString: Ptr = c.dlsym(x11, "XDrawString")
+    extern XOpenDisplay
+    extern XDefaultRootWindow
+    extern XCreateSimpleWindow
+    extern XMapWindow
+    extern XSelectInput
+    extern XNextEvent
+    extern XBlackPixel
+    extern XWhitePixel
+    extern XSetForeground
+    extern XCreateGC
+    extern XDefaultScreen
+    extern XDrawString
 
     let dpy: Ptr = XOpenDisplay(0)
     let screen: Ptr = XDefaultScreen(dpy)
diff --git a/src/codegen_x86_64.rs b/src/codegen_x86_64.rs
index d48f190..13e5c9d 100644
--- a/src/codegen_x86_64.rs
+++ b/src/codegen_x86_64.rs
@@ -106,7 +106,7 @@ section .text
         );
 
         // take that rustfmt
-        for name in "malloc,memset,realloc,free,puts,putchar,printf,snprintf,strtol,strlen,strcmp,strcat,strcpy,strncpy,fopen,fseek,ftell,fread,fwrite,fclose,rewind,system,opendir,readdir,closedir,exit,gettimeofday,connect,socket,send,write,read,close,bind,listen,accept,getchar,gethostbyname,dlopen,dlsym".split(",")
+        for name in "syscall,malloc,realloc,free,snprintf,strtol,system,opendir,readdir,closedir,gettimeofday,send,write,read,close,getchar,gethostbyname".split(",")
         {
             emit!(&mut self.output, "extern {}", name);
             emit!(&mut self.output, "c.{} equ {}", name, name);
@@ -121,6 +121,11 @@ _builtin_read8:
     mov al, byte [rdi]
     ret
 
+section .text._builtin_read32
+_builtin_read32:
+    mov eax, dword [rdi]
+    ret
+
 section .text._builtin_read64
 _builtin_read64:
     mov rax, qword [rdi]
diff --git a/src/parser.rs b/src/parser.rs
index da26145..883bdaa 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -276,7 +276,7 @@ impl Parser {
     }
 
     fn pipe(&mut self) -> Result<Expr, ZernError> {
-        let mut expr = self.logical_or()?;
+        let mut expr = self.or_and()?;
 
         while self.match_token(&[TokenType::Pipe]) {
             let pipe = self.previous().clone();
@@ -305,26 +305,10 @@ impl Parser {
         Ok(expr)
     }
 
-    fn logical_or(&mut self) -> Result<Expr, ZernError> {
-        let mut expr = self.logical_and()?;
-
-        while self.match_token(&[TokenType::BitOr]) {
-            let op = self.previous().clone();
-            let right = self.logical_and()?;
-            expr = Expr::Binary {
-                left: Box::new(expr),
-                op,
-                right: Box::new(right),
-            }
-        }
-
-        Ok(expr)
-    }
-
-    fn logical_and(&mut self) -> Result<Expr, ZernError> {
+    fn or_and(&mut self) -> Result<Expr, ZernError> {
         let mut expr = self.equality()?;
 
-        while self.match_token(&[TokenType::BitAnd]) {
+        while self.match_token(&[TokenType::BitOr, TokenType::BitAnd]) {
             let op = self.previous().clone();
             let right = self.equality()?;
             expr = Expr::Binary {
diff --git a/src/std.zr b/src/std.zr
index f7480b2..e2c83e8 100644
--- a/src/std.zr
+++ b/src/std.zr
@@ -1,6 +1,7 @@
 func dbg.panic[msg: String] : Void
-    c.printf("PANIC: %s\n", msg)
-    c.exit(1)
+    io.print("PANIC:")
+    io.println(msg)
+    os.exit(1)
 
 func mem.alloc[x: I64] : Ptr
     return c.malloc(x)
@@ -9,11 +10,15 @@ func mem.free[x: Ptr] : Void
     c.free(x)
 
 func mem.zero[x: I64, size: I64] : Void
-    c.memset(x, 0, size)
+    for i in 0..size
+        mem.write8(x + i, 0)
 
 func mem.read8[x: Ptr] : U8
     return _builtin_read8(x)
 
+func mem.read32[x: Ptr] : I64
+    return _builtin_read32(x)
+
 func mem.read64[x: Ptr] : I64
     return _builtin_read64(x)
 
@@ -24,46 +29,63 @@ func mem.write64[x: Ptr, d: I64] : Void
     _builtin_set64(x, d)
 
 func io.print[x: String] : Void
-    c.puts(x)
+    c.syscall(1, 1, x, str.len(x))
+
+func io.println[x: String] : Void
+    io.print(x)
+    io.print("\n")
+
+func io.print_char[x: U8] : Void
+    let s: String = mem.alloc(1)
+    str.set(s, 0, x)
+    c.syscall(1, 1, s, 1)
+    mem.free(s)
 
 func io.print_i64[x: I64] : Void
-    c.printf("%ld\n", x)
+    let s: String = str.from_i64(x)
+    io.print(s)
+    mem.free(s)
+
+func io.println_i64[x: I64] : Void
+    let s: String = str.from_i64(x)
+    io.println(s)
+    mem.free(s)
 
 func io.read_stdin[]: String
     let buffer: String = mem.alloc(1025)
-    let n: I64 = c.read(0, buffer, 1024)
+    let n: I64 = c.syscall(0, 0, buffer, 1024)
     if n < 0
         return ""
     str.set(buffer, n, 0)
     return buffer
 
 func io.read_file[path: String]: String
-    let file: Ptr = c.fopen(path, "rb")
-    if !file
+    let fd: I64 = c.syscall(2, path, 0, 0) // open
+    if fd <= 0
         dbg.panic("failed to open file")
 
-    c.fseek(file, 0, 2)
-    let size: I64 = c.ftell(file)
-    c.rewind(file)
+    let size: I64 = c.syscall(8, fd, 0, 2) // lseek to the end
+    c.syscall(8, fd, 0, 0) // lseek back to start
 
     let buffer: String = mem.alloc(size + 1)
-
-    // TODO: check if works with huge files
-    let n: I64 = c.fread(buffer, 1, size, file)
+    let n: I64 = c.syscall(0, fd, buffer, size) // read
     str.set(buffer, n, 0)
-    c.fclose(file)
+    c.syscall(3, fd) // close
     return buffer
 
 func io.write_file[path: String, content: String] : Void
-    let file: Ptr = c.fopen(path, "wb")
-    if !file
+    let fd: Ptr = c.syscall(2, path, 0x241, 0o644) // open
+    if fd < 0
         dbg.panic("failed to open file")
 
-    c.fwrite(content, 1, str.len(content), file)
-    c.fclose(file)
+    c.syscall(1, fd, content, str.len(content)) // write
+    c.syscall(3, fd) // close
 
 func str.len[s: String] : I64
-    return c.strlen(s)
+    let i: I64 = 0
+    while mem.read8(s + i)
+        i = i + 1
+    return i
 
 func str.copy[s: String] : String
     let size: I64 = str.len(s) + 1
@@ -76,15 +98,25 @@ func str.set[s: String, n: I64, c: U8] : Void
     mem.write8(s+n, c)
 
 func str.equal[a: String, b: String] : Bool
-    return c.strcmp(a, b) == 0
+    let i: I64 = 0
+    while a[i] != 0 & b[i] != 0
+        if a[i] != b[i]
+            return false
+        i = i + 1
+    return a[i] == b[i]
 
 func str.is_whitespace[x: U8] : Bool
     return x == ' ' | x == 10 | x == 13 | x == 9
 
 func str.concat[a: String, b: String] : String
-    let out: String = mem.alloc(str.len(a) + str.len(b) + 1)
-    c.strcpy(out, a)
-    c.strcat(out, b)
+    let a_len: I64 = str.len(a)
+    let b_len: I64 = str.len(b)
+    let out: String = mem.alloc(a_len + b_len + 1)
+    for i in 0..a_len
+        str.set(out, i, a[i])
+    for i in 0..b_len
+        str.set(out, a_len + i, b[i])
+    str.set(out, a_len + b_len, 0)
     return out
 
 func str.find[s: String, c: U8] : I64
@@ -99,7 +131,8 @@ func str.substr[s: String, start: I64, length: I64] : String
         dbg.panic("str.substr out of bounds")
 
     let out: String = mem.alloc(length + 1)
-    c.strncpy(out, s + start, length)
+    for i in 0..length
+        str.set(out, i, s[start + i])
     str.set(out, length, 0)
     return out
 
@@ -264,9 +297,9 @@ func math.is_prime[n: I64]: Bool
 
 func math.urandom[]: I64
     let buffer: Ptr = mem.alloc(8)
-    let file: Ptr = c.fopen("/dev/urandom", "rb")
-    c.fread(buffer, 8, 1, file)
-    c.fclose(file)
+    let fd: I64 = c.syscall(2, "/dev/urandom", 0, 0) // open
+    c.syscall(0, fd, buffer, 8) // read
+    c.syscall(3, fd) // close
     let n: I64 = mem.read64(buffer)
     mem.free(buffer)
     return n
@@ -337,7 +370,7 @@ func alg._partition[arr: Array, low: I64, high: I64] : I64
     return i + 1
 
 func os.exit[code: I64] : Void
-    c.exit(code)
+    c.syscall(60, code)
 
 func os.time[] : I64
     let tv: Ptr = mem.alloc(16)
@@ -370,7 +403,7 @@ func os.listdir[path: String] : Array
     return files
 
 func net.listen[port: I64] : I64
-    let s: I64 = c.socket(2, 1, 0)
+    let s: I64 = c.syscall(41, 2, 1, 0) // socket
     if s < 0
         return -1
 
@@ -381,13 +414,13 @@ func net.listen[port: I64] : I64
     mem.write8(sa + 2, (port >> 8) & 255)
     mem.write8(sa + 3, port & 255)
 
-    if c.bind(s, sa, 16) < 0
-        c.close(s)
+    if c.syscall(49, s, sa, 16) < 0 // bind
+        c.syscall(3, s) // close
         return -1
     mem.free(sa)
 
-    if c.listen(s, 1) < 0
-        c.close(s)
+    if c.syscall(50, s, 1) < 0 // listen
+        c.syscall(3, s) // close
         return -1
     
     return s
@@ -399,7 +432,7 @@ func net.connect[host: String, port: I64] : I64
 
     let ip_ptr: Ptr = mem.read64(mem.read64(he + 24))
 
-    let s: I64 = c.socket(2, 1, 0)
+    let s: I64 = c.syscall(41, 2, 1, 0) // socket
     if s < 0
         return -1
 
@@ -413,9 +446,9 @@ func net.connect[host: String, port: I64] : I64
     mem.write8(sa + 6, ip_ptr[2])
     mem.write8(sa + 7, ip_ptr[3])
 
-    if c.connect(s, sa, 16) < 0
+    if c.syscall(42, s, sa, 16) < 0 // connect
         mem.free(sa)
-        c.close(s)
+        c.syscall(3, s) // close
         return -1
 
     mem.free(sa)
diff --git a/src/tokenizer.rs b/src/tokenizer.rs
index 1c4e2cb..cdf00d8 100644
--- a/src/tokenizer.rs
+++ b/src/tokenizer.rs
@@ -299,6 +299,10 @@ impl Tokenizer {
             while self.peek().is_ascii_hexdigit() {
                 self.advance();
             }
+        } else if self.match_char('o') {
+            while matches!(self.peek(), '0'..='7') {
+                self.advance();
+            }
         } else {
             while self.peek().is_ascii_digit() {
                 self.advance();
diff --git a/test.zr b/test.zr
index 9994569..f74ac6d 100644
--- a/test.zr
+++ b/test.zr
@@ -1,5 +1,13 @@
 func run_test[x: String] : Void
-    c.printf("\033[93mBuilding %s...\033[0m", x)
+    if str.equal(x, "raylib.zr") | str.equal(x, "x11.zr")
+        io.print("\033[93mSkipping ")
+        io.print(x)
+        io.println("...\033[0m")
+        return 0
+
+    io.print("\033[93mBuilding ")
+    io.print(x)
+    io.print("...\033[0m ")
     let cmd: String = str.concat("./target/release/zern examples/", x)
 
     let build_start_time: I64 = os.time()
@@ -8,21 +16,33 @@ func run_test[x: String] : Void
     let build_end_time: I64 = os.time()
 
     mem.free(cmd)
-    c.printf(" %ldms\n", build_end_time - build_start_time)
+    io.print_i64(build_end_time - build_start_time)
+    io.println("ms")
 
-    if str.equal(x, "guess_number.zr") | str.equal(x, "tcp_server.zr") | str.equal(x, "raylib.zr") | str.equal(x, "x11.zr")
-        c.printf("\033[93mSkipping %s...\033[0m\n", x)
+    if str.equal(x, "guess_number.zr") | str.equal(x, "tcp_server.zr")
+        io.print("\033[93mSkipping ")
+        io.print(x)
+        io.println("...\033[0m")
+        return 0
+
+    io.print("\033[93mRunning ")
+    io.print(x)
+    io.println("...\033[0m")
+
+    let run_start_time: I64 = os.time()
+    if str.equal(x, "curl.zr")
+        if c.system("./out http://example.com") != 0
+            os.exit(1)
     else
-        let run_start_time: I64 = os.time()
-        if str.equal(x, "curl.zr")
-            if c.system("./out http://example.com") != 0
-                os.exit(1)
-        else
-            if c.system("./out") != 0
-                os.exit(1)
-        let run_end_time: I64 = os.time()
+        if c.system("./out") != 0
+            os.exit(1)
+    let run_end_time: I64 = os.time()
 
-        c.printf("\033[93mRunning %s...\033[0m %ldms\n", x, run_end_time - run_start_time)
+    io.print("\033[93mRunning ")
+    io.print(x)
+    io.print(" took\033[0m ")
+    io.print_i64(run_end_time - run_start_time)
+    io.println("ms")
 
 func main[] : I64
     c.system("cargo build --release")