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# Generate dl-tunable-list.h from dl-tunables.list
BEGIN {
tunable=""
ns=""
top_ns=""
}
# Skip over blank lines and comments.
/^#/ {
next
}
/^[ \t]*$/ {
next
}
# Beginning of either a top namespace, tunable namespace or a tunable, decided
# on the current value of TUNABLE, NS or TOP_NS.
$2 == "{" {
if (top_ns == "") {
top_ns = $1
}
else if (ns == "") {
ns = $1
}
else if (tunable == "") {
tunable = $1
}
else {
printf ("Unexpected occurrence of '{': %s:%d\n", FILENAME, FNR)
exit 1
}
next
}
# End of either a top namespace, tunable namespace or a tunable.
$1 == "}" {
if (tunable != "") {
# Tunables definition ended, now fill in default attributes.
if (!types[top_ns,ns,tunable]) {
types[top_ns,ns,tunable] = "STRING"
}
if (!minvals[top_ns,ns,tunable]) {
minvals[top_ns,ns,tunable] = "0"
}
if (!maxvals[top_ns,ns,tunable]) {
maxvals[top_ns,ns,tunable] = "0"
}
if (!env_alias[top_ns,ns,tunable]) {
env_alias[top_ns,ns,tunable] = "NULL"
}
if (!security_level[top_ns,ns,tunable]) {
security_level[top_ns,ns,tunable] = "SXID_ERASE"
}
tunable = ""
}
else if (ns != "") {
ns = ""
}
else if (top_ns != "") {
top_ns = ""
}
else {
printf ("syntax error: extra }: %s:%d\n", FILENAME, FNR)
exit 1
}
next
}
# Everything else, which could either be a tunable without any attributes or a
# tunable attribute.
{
if (ns == "") {
printf("Line %d: Invalid tunable outside a namespace: %s\n", NR, $0)
exit 1
}
if (tunable == "") {
# We encountered a tunable without any attributes, so note it with a
# default.
types[top_ns,ns,$1] = "STRING"
next
}
# Otherwise, we have encountered a tunable attribute.
split($0, arr, ":")
attr = gensub(/^[ \t]+|[ \t]+$/, "", "g", arr[1])
val = gensub(/^[ \t]+|[ \t]+$/, "", "g", arr[2])
if (attr == "type") {
types[top_ns,ns,tunable] = val
}
else if (attr == "minval") {
minvals[top_ns,ns,tunable] = val
}
else if (attr == "maxval") {
maxvals[top_ns,ns,tunable] = val
}
else if (attr == "env_alias") {
env_alias[top_ns,ns,tunable] = sprintf("\"%s\"", val)
}
else if (attr == "security_level") {
if (val == "SXID_ERASE" || val == "SXID_IGNORE" || val == "NONE") {
security_level[top_ns,ns,tunable] = val
}
else {
printf("Line %d: Invalid value (%s) for security_level: %s, ", NR, val,
$0)
print("Allowed values are 'SXID_ERASE', 'SXID_IGNORE', or 'NONE'")
exit 1
}
}
else if (attr == "default") {
if (types[top_ns,ns,tunable] == "STRING") {
default_val[top_ns,ns,tunable] = sprintf(".strval = \"%s\"", val);
}
else {
default_val[top_ns,ns,tunable] = sprintf(".numval = %s", val)
}
}
}
END {
if (ns != "") {
print "Unterminated namespace. Is a closing brace missing?"
exit 1
}
print "/* AUTOGENERATED by gen-tunables.awk. */"
print "#ifndef _TUNABLES_H_"
print "# error \"Do not include this file directly.\""
print "# error \"Include tunables.h instead.\""
print "#endif"
print "#include <dl-procinfo.h>\n"
# Now, the enum names
print "\ntypedef enum"
print "{"
for (tnm in types) {
split (tnm, indices, SUBSEP);
t = indices[1];
n = indices[2];
m = indices[3];
printf (" TUNABLE_ENUM_NAME(%s, %s, %s),\n", t, n, m);
}
print "} tunable_id_t;\n"
# Finally, the tunable list.
print "\n#ifdef TUNABLES_INTERNAL"
print "static tunable_t tunable_list[] attribute_relro = {"
for (tnm in types) {
split (tnm, indices, SUBSEP);
t = indices[1];
n = indices[2];
m = indices[3];
printf (" {TUNABLE_NAME_S(%s, %s, %s)", t, n, m)
printf (", {TUNABLE_TYPE_%s, %s, %s}, {%s}, NULL, TUNABLE_SECLEVEL_%s, %s},\n",
types[t,n,m], minvals[t,n,m], maxvals[t,n,m],
default_val[t,n,m], security_level[t,n,m], env_alias[t,n,m]);
}
print "};"
print "#endif"
}
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