+ char **tmp, **tmp2, **avj;
+ int repls;
+
+ repls = Rflag;
+
+ if (argc == 0 || repls == 0) {
+ *xp = NULL;
+ run(argv);
+ return;
+ }
+
+ avj = argv;
+
+ /*
+ * Allocate memory to hold the argument list, and
+ * a NULL at the tail.
+ */
+ tmp = malloc((argc + 1) * sizeof(char**));
+ if (tmp == NULL)
+ errx(1, "malloc failed");
+ tmp2 = tmp;
+
+ /*
+ * Save the first argument and iterate over it, we
+ * cannot do strnsubst() to it.
+ */
+ if ((*tmp++ = strdup(*avj++)) == NULL)
+ errx(1, "strdup failed");
+
+ /*
+ * For each argument to utility, if we have not used up
+ * the number of replacements we are allowed to do, and
+ * if the argument contains at least one occurance of
+ * replstr, call strnsubst(), else just save the string.
+ * Iterations over elements of avj and tmp are done
+ * where appropriate.
+ */
+ while (--argc) {
+ *tmp = *avj++;
+ if (repls && strstr(*tmp, replstr) != NULL) {
+ strnsubst(tmp++, replstr, inpline, (size_t)255);
+ repls--;
+ } else {
+ if ((*tmp = strdup(*tmp)) == NULL)
+ errx(1, "strdup failed");
+ tmp++;
+ }
+ }
+
+ /*
+ * Run it.
+ */
+ *tmp = NULL;
+ run(tmp2);
+
+ /*
+ * Walk from the tail to the head, free along the way.
+ */
+ for (; tmp2 != tmp; tmp--)
+ free(*tmp);
+ /*
+ * Now free the list itself.
+ */
+ free(tmp2);
+
+ /*
+ * Free the input line buffer, if we have one.
+ */
+ if (inpline != NULL) {
+ free(inpline);
+ inpline = NULL;
+ }
+}
+
+static void
+run(char **argv)
+{
+ volatile int childerr;
+ char **avec;
projects / apple / shell_cmds.git / blobdiff