On Sun, 28 Feb 2016, Zev Weiss wrote:
> On Thu, Feb 18, 2016 at 15:07:02 -0500, Nicolas Pitre wrote:
> >diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
> >new file mode 100755
> >index 0000000000..898a3ca1b2
> >--- /dev/null
> >+++ b/scripts/adjust_autoksyms.sh
> > @@ -0,0 +1,97 @@
> >+#!/bin/sh
>
> Given the here-strings in this script, this should probably be /bin/bash or
> breakage will ensue on Debian and suchlike where /bin/sh != bash. However...
>
> >+sed -ns -e '3s/ /\n/gp' "$MODVERDIR"/*.mod | sort -u |
> >+while read sym; do
> >+ if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then
> >+ sym=$(sed 's/^_//' <<< "$sym")
>
> ...this one could (shell-portably and more efficiently) be a parameter
> expansion (sym="${sym#_}").
Indeed.
> >+
> >+# Extract changes between old and new list and touch corresponding
> >+# dependency files.
> >+# Note: sort -m doesn't work well with underscore prefixed symbols so we
> >+# use 'cat ... | sort' instead.
> >+changed=0
> >+while read sympath; do
> >+ [ -z "$sympath" ] && continue
> >+ depfile="include/config/ksym/${sympath}.h"
> >+ mkdir -p "$(dirname "$depfile")"
> >+ touch "$depfile"
> >+ changed=$((changed + 1))
> >+done <<< "$(
> >+ cat "$cur_ksyms_file" "$new_ksyms_file" | sort | uniq -u |
> >+ sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" )"
>
> Nothing super-obvious springs to mind as a pure-sh equivalent for this one
> though, so assuming the script remains bash-specific, a process substitution
> like
>
> done < <(cat ...)
>
> might slightly cleaner than the here-string + command substitution (doesn't
> need quoting, and just streams through a pipe rather than bash snarfing it all
> up into a string).
Right. Still, I decided to make it compatible with a simpler shell. I
applied the following changes and tested it with dash.
diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
index 898a3ca1b2..a145a24cd8 100755
--- a/scripts/adjust_autoksyms.sh
+++ b/scripts/adjust_autoksyms.sh
@@ -57,9 +57,7 @@ cat > "$new_ksyms_file" << EOT
EOT
sed -ns -e '3s/ /\n/gp' "$MODVERDIR"/*.mod | sort -u |
while read sym; do
- if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then
- sym=$(sed 's/^_//' <<< "$sym")
- fi
+ [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ] && sym="${sym#_}"
echo "#define __KSYM_${sym} 1"
done >> "$new_ksyms_file"
@@ -72,16 +70,18 @@ fi
# dependency files.
# Note: sort -m doesn't work well with underscore prefixed symbols so we
# use 'cat ... | sort' instead.
-changed=0
+changed=$(
+count=0
+cat "$cur_ksyms_file" "$new_ksyms_file" | sort | uniq -u |
+sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" |
while read sympath; do
[ -z "$sympath" ] && continue
depfile="include/config/ksym/${sympath}.h"
mkdir -p "$(dirname "$depfile")"
touch "$depfile"
- changed=$((changed + 1))
-done <<< "$(
- cat "$cur_ksyms_file" "$new_ksyms_file" | sort | uniq -u |
- sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" )"
+ echo $((count += 1))
+done | tail -1 )
+changed=${changed:-0}
if [ $changed -gt 0 ]; then
# Replace the old list with tne new one
Nicolas
--
To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
