setup: if there are existing init scripts in place, scan them

for the HTTP and HTTPS port numbers we used last time.

diff --git a/webcit/setup.c b/webcit/setup.c
index 136892f6a10ed0d50e720113f9edc2e523abaf4d..0c06de983bed25adefb4923ae9626e8d9ef4f05d 100644 (file)
--- a/webcit/setup.c
+++ b/webcit/setup.c
@@ -315,7 +315,8 @@ void progress(char *text, long int curr, long int cmax)
  */
 void install_init_scripts(void)
 {
-       char question[SIZ];
+       char question[1024];
+       char buf[256];
        char http_port[128];
 #ifdef HAVE_OPENSSL
        char https_port[128];
@@ -333,12 +334,40 @@ void install_init_scripts(void)
        if (yesno(question) == 0)
                return;
 
+       /* Default port numbers */
+       sprintf(http_port, "2000");
+#ifdef HAVE_OPENSSL
+       sprintf(https_port, "443");
+#endif
+
+       /* This is a very hackish way of learning the port numbers used
+        * in a previous install, if we are upgrading: read them out of
+        * the existing init script.
+        */
+       fp = fopen("/etc/init.d/webcit", "r");
+       if (fp != NULL) {
+               while (fgets(buf, sizeof buf, fp) != NULL) {
+                       if (strlen(buf) > 0) {
+                               buf[strlen(buf)-1] = 0; /* strip trailing cr */
+                       }
+                       if (!strncasecmp(buf, "HTTP_PORT=", 10)) {
+                               safestrncpy(http_port, &buf[10], sizeof http_port);
+                       }
+#ifdef HAVE_OPENSSL
+                       if (!strncasecmp(buf, "HTTPS_PORT=", 11)) {
+                               safestrncpy(https_port, &buf[11], sizeof https_port);
+                       }
+#endif
+               }
+               fclose(fp);
+       }
+
+       /* Now ask for the port numbers */
        snprintf(question, sizeof question,
                "On which port do you want WebCit to listen for HTTP "
                "requests?\n\nYou can use the standard port (80) if you are "
                "not running another\nweb server (such as Apache), otherwise "
                "select another port.");
-       sprintf(http_port, "2000");
        set_value(question, http_port);
        uname(&my_utsname);
        sprintf(suggested_url, "http://%s:%s/", my_utsname.nodename, http_port);
@@ -349,7 +378,6 @@ void install_init_scripts(void)
                "requests?\n\nYou can use the standard port (443) if you are "
                "not running another\nweb server (such as Apache), otherwise "
                "select another port.");
-       sprintf(https_port, "443");
        set_value(question, https_port);
 #endif