Research PDP7 development

[unix-history] / chown.s

diff --git a/chown.s b/chown.s
new file mode 100644 (file)
index 0000000..80fb8aa
--- /dev/null
+++ b/chown.s
@@ -0,0 +1,78 @@
+" chowner
+
+   lac 017777 i
+   sad d4
+   jmp error
+
+   lac 017777
+   tad d4
+   dac 8
+   tad d1
+   dac name
+   dzm octal
+   dzm nchar
+   -8
+   dac c1
+1:
+   lac nchar
+   dzm nchar
+   sza
+   jmp 2f
+   lac 8 i
+   lmq
+   and o177
+   dac nchar
+   lacq
+   lrss 9
+2:
+   sad o40
+   jmp 3f
+   tad om60
+   lmq
+   lac octal
+   cll; als 3
+   omq
+   dac octal
+3:
+   isz c1
+   jmp 1b
+
+loop:
+   lac 017777 i
+   sad d8
+   sys exit
+   tad dm4
+   dac 017777 i
+   lac name
+   tad d4
+   dac name
+   lac octal
+   sys chowner; name:0
+   sma
+   jmp loop
+   lac name
+   dac 1f
+   lac d1
+   sys write; 1:0; 4
+   lac d1
+   sys write; 1f; 2
+   jmp loop
+1:
+   040;077012
+
+error:
+   lac d1
+   sys write; 1b+1; 1
+   sys exit
+
+om60: -060
+o40: 040
+d1: 1
+d8: 8
+dm4: -4
+d4: 4
+o177: 0177
+
+nchar: .=.+1
+c1: .=.+1
+octal: .=.+1
\ No newline at end of file