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