1 files changed, 94 insertions, 0 deletions
diff --git a/src/lib/syscall/mkerrors b/src/lib/syscall/mkerrors
new file mode 100755
index 000000000..015f02145
--- /dev/null
+++ b/src/lib/syscall/mkerrors
@@ -0,0 +1,94 @@
+#!/bin/sh
+# Copyright 2009 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+
+# Generate Go code listing error values (ENAMETOOLONG etc)
+# and signal values (SIGALRM etc).  They're unrelated except
+# that we use the same method for finding them.
+
+errors=$(
+	echo '#include <errno.h>' |
+	# The gcc command line prints all the #defines
+	# it encounters while processing the input
+	gcc -x c - -E -dM |
+	egrep -h '#define E[A-Z0-9_]+ ' $files |
+	sed 's/#define //; s/ .*//'
+)
+
+signals=$(
+	echo '#include <sys/signal.h>' |
+	gcc -x c - -E -dM |
+	egrep -h '#define SIG[^_]' |
+	egrep -v '#define (SIGEV_|SIGSTKSZ|SIGRT(MIN|MAX))' |
+	sed 's/#define //; s/ .*//'
+)
+
+# Write godefs input.
+(
+	echo '#include <errno.h>'
+	echo '#include <signal.h>'
+	echo 'enum {'
+	for i in $errors $signals
+	do
+		echo '$'"$i = $i,"
+	done
+	echo '};'
+) >_errors.c
+
+echo '// mkerrors' "$@"
+echo '// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT'
+echo
+godefs -gsyscall "$@" _errors.c
+
+# Run C program to print error strings.
+(
+	echo "
+#include <stdio.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+
+#define nelem(x) (sizeof(x)/sizeof((x)[0]))
+
+enum { A = 'A', Z = 'Z', a = 'a', z = 'z' }; // avoid need for single quotes below
+
+int errors[] = {
+"
+	for i in $errors
+	do
+		echo '	'$i,
+	done
+
+	echo '
+};
+
+int
+main(void)
+{
+	int i, j, e;
+	char buf[1024];
+
+	printf("\n\n// Error table\n");
+	printf("var errors = [...]string {\n");
+	for(i=0; i<nelem(errors); i++) {
+		e = errors[i];
+		for(j=0; j<i; j++)
+			if(errors[j] == e)	// duplicate value
+				goto next;
+		strcpy(buf, strerror(e));
+		// lowercase first letter: Bad -> bad, but STREAM -> STREAM.
+		if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z)
+			buf[0] += a - A;
+		printf("\t%d: \"%s\",\n", e, buf);
+	next:;
+	}
+	printf("}\n\n");
+}
+
+'
+) >_errors.c
+
+gcc -o _errors _errors.c && ./_errors
+rm -f _errors.c _errors