If style.css does not exist, it's created with the default one.

data.c

@@ -156,6 +156,14 @@ int srv_open(const char *basedir, int auto_upgrade)
     /* read (and drop) emojis.json, possibly creating it */
     xs_free(emojis());
 
+    /* if style.css does not exist, create it */
+    xs *css_fn = xs_fmt("%s/style.css", srv_basedir);
+
+    if (mtime(css_fn) == 0) {
+        srv_log(xs_fmt("Writing style.css"));
+        write_default_css();
+    }
+
     return ret;
 }
 

snac.h

@@ -347,6 +347,7 @@ int html_post_handler(const xs_dict *req, const char *q_path,
                       char **body, int *b_size, char **ctype);
 xs_str *timeline_to_rss(snac *user, const xs_list *timeline, char *title, char *link, char *desc);
 
+int write_default_css(void);
 int snac_init(const char *_basedir);
 int adduser(const char *uid);
 int resetpwd(snac *snac);

utils.c

@@ -107,6 +107,22 @@ static const char *greeting_html =
     "<p>This site is powered by <abbr title=\"Social Networks Are Crap\">snac</abbr>.</p>\n"
     "</body></html>\n";
 
+
+int write_default_css(void)
+{
+    FILE *f;
+
+    xs *sfn = xs_fmt("%s/style.css", srv_basedir);
+    if ((f = fopen(sfn, "w")) == NULL)
+        return 1;
+
+    fwrite(default_css, strlen(default_css), 1, f);
+    fclose(f);
+
+    return 0;
+}
+
+
 int snac_init(const char *basedir)
 {
     FILE *f;
@@ -217,15 +233,11 @@ int snac_init(const char *basedir)
     fwrite(gh, strlen(gh), 1, f);
     fclose(f);
 
-    xs *sfn = xs_fmt("%s/style.css", srv_basedir);
-    if ((f = fopen(sfn, "w")) == NULL) {
-        printf("ERROR: cannot create '%s'\n", sfn);
+    if (write_default_css()) {
+        printf("ERROR: cannot create style.css\n");
         return 1;
     }
 
-    fwrite(default_css, strlen(default_css), 1, f);
-    fclose(f);
-
     xs *cfn = xs_fmt("%s/server.json", srv_basedir);
     if ((f = fopen(cfn, "w")) == NULL) {
         printf("ERROR: cannot create '%s'\n", cfn);