Revised error handling

- Functions warn() and die() replaced by GNU-like error(3) function
- Register cleanup() with atexit(3)
- Functions called by cleanup() are marked with CLEANUP and are not allowed to
  call exit(3)

1 files changed, 3 insertions, 2 deletions

diff --git a/util.h b/util.h
index 86abea8..8359dc8 100644
--- a/util.h
+++ b/util.h
@@ -61,12 +61,13 @@ typedef struct {
 	int stlen;
 } r_dir_t;
 
+extern const char *progname;
+
 void* emalloc(size_t);
 void* erealloc(void*, size_t);
 char* estrdup(const char*);
 
-void warn(const char*, ...);
-void die(const char*, ...);
+void error(int, int, const char*, ...);
 
 void size_readable(float*, const char**);