Avoid trailing slash in virtual-root

When setting virtual-root from cgitrc, care is taken to avoid trailing
slashes. But when no virtual-root setting is specified, SCRIPT_FILE
from the web server is used without similar checks. This patch fixes the
inconsistency, which could lead to double-slashes in generated links.

Noticed-by: Wouter Van Hemel <wouter@duodecim.org>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/cgit.c b/cgit.c
index ad62d10..af9832f 100644
--- a/cgit.c
+++ b/cgit.c
@@ -666,36 +666,37 @@ int main(int argc, const char **argv)
 {
         const char *path;
         char *qry;
         int err, ttl;
 
         prepare_context(&ctx);
         cgit_repolist.length = 0;
         cgit_repolist.count = 0;
         cgit_repolist.repos = NULL;
 
         cgit_parse_args(argc, argv);
         parse_configfile(ctx.env.cgit_config, config_cb);
         ctx.repo = NULL;
         http_parse_querystring(ctx.qry.raw, querystring_cb);
 
         /* If virtual-root isn't specified in cgitrc, lets pretend
-         * that virtual-root equals SCRIPT_NAME.
+         * that virtual-root equals SCRIPT_NAME, minus any possibly
+         * trailing slashes.
          */
         if (!ctx.cfg.virtual_root)
-                ctx.cfg.virtual_root = ctx.cfg.script_name;
+                ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
 
         /* If no url parameter is specified on the querystring, lets
          * use PATH_INFO as url. This allows cgit to work with virtual
          * urls without the need for rewriterules in the webserver (as
          * long as PATH_INFO is included in the cache lookup key).
          */
         path = ctx.env.path_info;
         if (!ctx.qry.url && path) {
                 if (path[0] == '/')
                         path++;
                 ctx.qry.url = xstrdup(path);
                 if (ctx.qry.raw) {
                         qry = ctx.qry.raw;
                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
                         free(qry);
                 } else