+ /* Now NULL terminate the string */
+ cp[len1 + len2] = '\0';
+
+ return cp;
+}
+
+
+/*
+** create_folder
+** Check to see if a folder exists, if not, prompt the user to create it.
+*/
+void
+create_folder(char *folder, int autocreate, void (*done_callback)(int))
+{
+ struct stat st;
+ extern int errno;
+ char *cp;
+
+ if (stat(folder, &st) == -1) {
+ if (errno != ENOENT) {
+ adios(EX_IOERR, folder, "error on folder");
+ }
+ if (autocreate == 0) {
+ /* ask before creating folder */
+ cp = concat("Create folder \"", folder, "\"? ", NULL);
+ if (!getanswer(cp)) {
+ done_callback(EX_CANTCREAT);
+ }
+ free(cp);
+ } else if (autocreate == -1) {
+ /* do not create, so exit */
+ done_callback(EX_CANTCREAT);
+ }
+ if (!makedir(folder)) {
+ adios(EX_CANTCREAT, NULL, "unable to create folder %s", folder);
+ }
+ }
+}
+
+/*
+** num_digits
+** Return the number of digits in a nonnegative integer.
+*/
+int
+num_digits(int n)
+{
+ int ndigits = 0;