X-Git-Url: http://git.draconx.ca/gitweb/liblbx.git/blobdiff_plain/5749c5e97a8b984720cef75f328944270874d713..c81b3f9cfa09bcf212214f006d879585774619e2:/src/tools.h

diff --git a/src/tools.h b/src/tools.h
index 315d965..c2c10ff 100644
--- a/src/tools.h
+++ b/src/tools.h
@@ -20,13 +20,28 @@
 #ifndef TOOLS_H_
 #define TOOLS_H_
 
+#include <stdarg.h>
+
 void tool_init(const char *name, int argc, char **argv);
 void tool_version(void);
 
 const char *tool_invocation(void);
 
-#define errmsg(fmt, ...) (\
-	fprintf(stderr, "%s: " fmt, tool_invocation(), __VA_ARGS__)\
-)
+/*
+ * Error messaging routines.  Similar to printf, but writes to standard error
+ * and prefixes the output with the program invocation name, automatically
+ * appending a newline.  If err is 0, the result of strerror(errno) is also
+ * printed in a similar manner as perror.  If err is positive, then that
+ * value is used instead of errno.
+ */
+int tool_verr(int err, const char *fmt, va_list ap);
+int tool_err(int err, const char *fmt, ...);
+
+/*
+ * Messaging routines similar to the above, except that they write to standard
+ * output and there is no option to include strerror(errno).
+ */
+int tool_vmsg(const char *fmt, va_list ap);
+int tool_msg(const char *fmt, ...);
 
 #endif