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-rw-r--r--usage.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/usage.c b/usage.c
index 820d09f92b..b6aea45280 100644
--- 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;