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="${sym#_}").
+
+# Extract changes between old and new list and touch corresponding
+# dependency files.
+# Note: sort -m doesn't work well with underscore prefixed symbols so we
+# use 'cat ... | sort' instead.
+changed=0
+while read sympath; do
+ [ -z "$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).
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