Introduce error code system

Refactor spawn function, use return error code, provide more clearly
error handling.

1 files changed, 12 insertions, 1 deletions

diff --git a/src/err.h b/src/err.h
index 6bb4697..bb5ced5 100644
--- a/src/err.h
+++ b/src/err.h
@@ -1,8 +1,19 @@
 #ifndef SS_ERR_H
 #define SS_ERR_H
 
+#include <errno.h>
 #include <stdarg.h>
 
-void die(const char* err, ...);
+enum sf_error {
+	SF_OK = 0,
+	SF_ERR_INVALID_ARG = -1,
+	SF_ERR_INVALID_LEN = -2,
+	SF_ERR_EXEC_FAILED = -3,
+	SF_ERR_SIGNALED = -4,
+	SF_ERR_NOMEM = -ENOMEM,
+	SF_ERR_CANCEL = -1000,
+};
+
+void die(const char *err, ...);
 
 #endif /* SS_ERR_H */