[PATCH 11/11] hornet: scripts: Improve argument handling and error messages

[Blaise Boscaccy <bboscaccy@linux.microsoft.com>]

Spaces in file names may have caused invocation errors. Additionally
add helpful error messages if we are unable to extract the requested
payload.

Signed-off-by: Blaise Boscaccy <bboscaccy@linux.microsoft.com>
---
 scripts/hornet/extract-insn.sh | 14 +++++++++++---
 scripts/hornet/extract-map.sh  | 15 ++++++++++++---
 scripts/hornet/extract-skel.sh | 25 ++++++++++++++++++++++---
 3 files changed, 45 insertions(+), 9 deletions(-)

diff --git a/scripts/hornet/extract-insn.sh b/scripts/hornet/extract-insn.sh
index 3e7bed049acb6..e0c7a4ae967f3 100755
--- a/scripts/hornet/extract-insn.sh
+++ b/scripts/hornet/extract-insn.sh
@@ -21,7 +21,15 @@ EXPECTED_ARGS=1
 
 if [ $ARGC -ne $EXPECTED_ARGS ] ; then
     usage
-else
-    printf $(gcc -E $1 | grep "opts_insn" | \
-		 awk -F"=" '{print $2}' | sed 's/[[:space:];]*$//' | sed 's/\"//g')
 fi
+
+HEADER="$1"
+STR=$(gcc -E "$HEADER" | \
+      sed -n 's/.*char opts_insn[[:space:]]*\[\][^=]*=[[:space:]]*"\(.*\)"[[:space:]]*;.*/\1/p')
+
+if [ -z "$STR" ]; then
+    echo "$(basename "$0"): no opts_insn[] declaration found in $HEADER" >&2
+    exit 1
+fi
+
+printf '%b' "$STR"
diff --git a/scripts/hornet/extract-map.sh b/scripts/hornet/extract-map.sh
index 1d92ebe1a04b5..2d68bb473d889 100755
--- a/scripts/hornet/extract-map.sh
+++ b/scripts/hornet/extract-map.sh
@@ -21,7 +21,16 @@ EXPECTED_ARGS=1
 
 if [ $ARGC -ne $EXPECTED_ARGS ] ; then
     usage
-else
-    printf $(gcc -E $1 | grep "opts_data" | \
-		 awk -F"=" '{print $2}' | sed 's/[[:space:];]*$//' | sed 's/\"//g')
 fi
+
+# See extract-insn.sh for the rationale behind the sed/printf '%b' shape.
+HEADER="$1"
+STR=$(gcc -E "$HEADER" | \
+      sed -n 's/.*char opts_data[[:space:]]*\[\][^=]*=[[:space:]]*"\(.*\)"[[:space:]]*;.*/\1/p')
+
+if [ -z "$STR" ]; then
+    echo "$(basename "$0"): no opts_data[] declaration found in $HEADER" >&2
+    exit 1
+fi
+
+printf '%b' "$STR"
diff --git a/scripts/hornet/extract-skel.sh b/scripts/hornet/extract-skel.sh
index e115f4b7fdf74..c980f245f4a39 100755
--- a/scripts/hornet/extract-skel.sh
+++ b/scripts/hornet/extract-skel.sh
@@ -21,7 +21,26 @@ EXPECTED_ARGS=2
 
 if [ $ARGC -ne $EXPECTED_ARGS ] ; then
     usage
-else
-    printf $(gcc -E $1 | grep "static const char opts_$2" | \
-		 awk -F"=" '{print $2}' | sed 's/[[:space:];]*$//' | sed 's/\"//g')
 fi
+
+# See extract-insn.sh for the rationale behind the sed/printf '%b' shape.
+HEADER="$1"
+FIELD="$2"
+
+# Reject anything that could escape into the sed pattern below.
+case "$FIELD" in
+    *[!A-Za-z0-9_]*|"")
+        echo "$(basename "$0"): invalid field name '$FIELD'" >&2
+        exit 1
+        ;;
+esac
+
+STR=$(gcc -E "$HEADER" | \
+      sed -n "s/.*char opts_${FIELD}[[:space:]]*\[\][^=]*=[[:space:]]*\"\(.*\)\"[[:space:]]*;.*/\1/p")
+
+if [ -z "$STR" ]; then
+    echo "$(basename "$0"): no opts_${FIELD}[] declaration found in $HEADER" >&2
+    exit 1
+fi
+
+printf '%b' "$STR"
-- 
2.53.0