refactor and add su

1 files changed, 21 insertions, 2 deletions

diff --git a/lib/error.c b/lib/error.c
index 67828c9..0b55edb 100644
--- a/lib/error.c
+++ b/lib/error.c
@@ -1,17 +1,29 @@
-#include "error.h"
+#include "lslib.h"
 
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
+#include <string.h>
 
 extern char* cmd;
 
+void die (void) {
+    exit (EXIT_FAILURE);
+}
+
 void error_s(const char *format, ...) {
     va_list list;
     va_start(list, format);
 
     fprintf(stderr, "%s: ", cmd);
     vfprintf(stderr, format, list);
+
+    if (errno != 0) {
+        fprintf(stderr, ": %s", strerror(errno));
+        errno = 0;
+    }
+
     fprintf(stderr, "\n");
 }
 
@@ -21,8 +33,15 @@ void error(const char *format, ...) {
 
     fprintf(stderr, "%s: ", cmd);
     vfprintf(stderr, format, list);
+    
+    if (errno != 0) {
+        fprintf(stderr, ": %s", strerror(errno));
+        errno = 0;
+    }
+
     fprintf(stderr, "\n");
-    exit(EXIT_FAILURE);
+    
+    die();
 }
 
 void output(const char *format, ...) {