(sort): If all the input files are empty, create an empty output file.

diff --git a/src/sort.c b/src/sort.c
index 981c97f..f9534a1 100644 (file)
--- a/src/sort.c
+++ b/src/sort.c
@@ -1866,6 +1866,7 @@ sort (char **files, int nfiles, char const *output_file)
 {
   struct buffer buf;
   int n_temp_files = 0;
+  int output_file_created = 0;
 
   buf.alloc = 0;
 
@@ -1909,6 +1910,7 @@ sort (char **files, int nfiles, char const *output_file)
              xfclose (fp, file);
              tfp = xfopen (output_file, "w");
              temp_output = output_file;
+             output_file_created = 1;
            }
          else
            {
@@ -1928,7 +1930,7 @@ sort (char **files, int nfiles, char const *output_file)
 
          xfclose (tfp, temp_output);
 
-         if (! n_temp_files)
+         if (output_file_created)
            goto finish;
        }
       xfclose (fp, file);
@@ -1937,7 +1939,7 @@ sort (char **files, int nfiles, char const *output_file)
  finish:
   free (buf.buf);
 
-  if (n_temp_files)
+  if (! output_file_created)
     {
       int i = n_temp_files;
       struct tempnode *node;