+/*
+ * For each mlink to the mpage, check whether the path looks like
+ * it is formatted, and if it does, check whether a source manual
+ * exists by the same name, ignoring the suffix.
+ * If both conditions hold, drop the mlink.
+ */
+static void
+mlinks_undupe(struct mpage *mpage)
+{
+ char buf[PATH_MAX];
+ struct mlink **prev;
+ struct mlink *mlink;
+ char *bufp;
+
+ mpage->form = FORM_CAT;
+ prev = &mpage->mlinks;
+ while (NULL != (mlink = *prev)) {
+ if (FORM_CAT != mlink->dform) {
+ mpage->form = FORM_NONE;
+ goto nextlink;
+ }
+ if (strlcpy(buf, mlink->file, PATH_MAX) >= PATH_MAX) {
+ if (warnings)
+ say(mlink->file, "Filename too long");
+ goto nextlink;
+ }
+ bufp = strstr(buf, "cat");
+ assert(NULL != bufp);
+ memcpy(bufp, "man", 3);
+ if (NULL != (bufp = strrchr(buf, '.')))
+ *++bufp = '\0';
+ strlcat(buf, mlink->dsec, PATH_MAX);
+ if (NULL == ohash_find(&mlinks,
+ ohash_qlookup(&mlinks, buf)))
+ goto nextlink;
+ if (warnings)
+ say(mlink->file, "Man source exists: %s", buf);
+ if (use_all)
+ goto nextlink;
+ *prev = mlink->next;
+ mlink_free(mlink);
+ continue;
+nextlink:
+ prev = &(*prev)->next;
+ }
+}
+
+static int
+mlink_check(struct mpage *mpage, struct mlink *mlink)
+{
+ int match;
+
+ match = 1;
+
+ /*
+ * Check whether the manual section given in a file
+ * agrees with the directory where the file is located.
+ * Some manuals have suffixes like (3p) on their
+ * section number either inside the file or in the
+ * directory name, some are linked into more than one
+ * section, like encrypt(1) = makekey(8).
+ */
+
+ if (FORM_SRC == mpage->form &&
+ strcasecmp(mpage->sec, mlink->dsec)) {
+ match = 0;
+ say(mlink->file, "Section \"%s\" manual in %s directory",
+ mpage->sec, mlink->dsec);
+ }
+
+ /*
+ * Manual page directories exist for each kernel
+ * architecture as returned by machine(1).
+ * However, many manuals only depend on the
+ * application architecture as returned by arch(1).
+ * For example, some (2/ARM) manuals are shared
+ * across the "armish" and "zaurus" kernel
+ * architectures.
+ * A few manuals are even shared across completely
+ * different architectures, for example fdformat(1)
+ * on amd64, i386, sparc, and sparc64.
+ */
+
+ if (strcasecmp(mpage->arch, mlink->arch)) {
+ match = 0;
+ say(mlink->file, "Architecture \"%s\" manual in "
+ "\"%s\" directory", mpage->arch, mlink->arch);
+ }
+
+ if (strcasecmp(mpage->title, mlink->name))
+ match = 0;
+
+ return(match);
+}
+