builtin.h: remove unused cmd_<foo> declarations
[gitweb.git] / usage.c
diff --git a/usage.c b/usage.c
index 820d09f92b03b6cc96fbe9a954c37fd2d5e5a417..b6aea45280bf2aa4c06a0130f912a61377165016 100644 (file)
--- a/usage.c
+++ b/usage.c
@@ -60,6 +60,34 @@ void die(const char *err, ...)
        va_end(params);
 }
 
+void die_errno(const char *fmt, ...)
+{
+       va_list params;
+       char fmt_with_err[1024];
+       char str_error[256], *err;
+       int i, j;
+
+       err = strerror(errno);
+       for (i = j = 0; err[i] && j < sizeof(str_error) - 1; ) {
+               if ((str_error[j++] = err[i++]) != '%')
+                       continue;
+               if (j < sizeof(str_error) - 1) {
+                       str_error[j++] = '%';
+               } else {
+                       /* No room to double the '%', so we overwrite it with
+                        * '\0' below */
+                       j--;
+                       break;
+               }
+       }
+       str_error[j] = 0;
+       snprintf(fmt_with_err, sizeof(fmt_with_err), "%s: %s", fmt, str_error);
+
+       va_start(params, fmt);
+       die_routine(fmt_with_err, params);
+       va_end(params);
+}
+
 int error(const char *err, ...)
 {
        va_list params;