find out about operating system on foreign machines

diff --git a/first/first b/first/first
index 050e4a7..0b86f05 100755 (executable)
--- a/first/first
+++ b/first/first
@@ -177,9 +177,27 @@ sun2)              ACM=sun2 ; SYS=BSD4_2 ;;
 m68_unisoft)   ACM=m68k2 ; SYS=V7 ;;
 m68_sysV_0)    ACM=mantra ; SYS=SYS_5 ;;
 m68020)                ACM=m68020 ; SYS=SYS_5 ;;
-SMALL)         ACM=i86 ; BM = 0 ; SYS=SYS_5 ;;
-*)             ACM=m68k2 ; SYS=SYS_5 ;;
+SMALL)         ACM=i86 ; BM = 0 ; SYS=XXX ;;
+*)             ACM=m68k2 ; SYS=XXX ;;
 esac
+while :
+do
+case $SYS in
+V7|BSD4_1|BSD4_2|SYS_5)
+       break
+       ;;
+*)
+       echo -n "What kind of Unix are you running?
+Choices:
+       V7      for Unix V7, BSD 2.*
+       BSD4_1  for Berkeley 4.1
+       BSD4_2  for Berkeley 4.2, 4.3, SunOS
+       SYS_5   for Xenix, System III, System V
+Your choice (V7|BSD4_1|BSD4_2|SYS_5): "
+       read SYS
+       ;;
+esac
+done
 rm -f local.h
 sed -e /ACKM/s/'".*"'/'"'$ACM'"'/ -e /BIGMACH/s/'[01]'/$BM/ -e /SYSTEM/s/'^#[  ]*define[       ]*[a-zA-Z_][a-zA-Z0-9_]*'/"#    define $SYS"/ < local.h.src >local.h
 if cmp -s ../h/local.h local.h