git-daemon --base-path

[git.git] / daemon.c

diff --git a/daemon.c b/daemon.c
index 539f6e8..3bd1426 100644 (file)
--- a/daemon.c
+++ b/daemon.c
@@ -15,7 +15,8 @@ static int verbose;
 
 static const char daemon_usage[] =
 "git-daemon [--verbose] [--syslog] [--inetd | --port=n] [--export-all]\n"
-"           [--timeout=n] [--init-timeout=n] [--strict-paths] [directory...]";
+"           [--timeout=n] [--init-timeout=n] [--strict-paths]\n"
+"           [--base-path=path] [directory...]";
 
 /* List of acceptable pathname prefixes */
 static char **ok_paths = NULL;
@@ -24,6 +25,9 @@ static int strict_paths = 0;
 /* If this is set, git-daemon-export-ok is not required */
 static int export_all_trees = 0;
 
+/* Take all paths relative to this one if non-NULL */
+static char *base_path = NULL;
+
 /* Timeout, and initial timeout */
 static unsigned int timeout = 0;
 static unsigned int init_timeout = 0;
@@ -138,6 +142,17 @@ static char *path_ok(char *dir)
                return NULL;
        }
 
+       if (base_path) {
+               static char rpath[PATH_MAX];
+               if (*dir != '/') {
+                       /* Forbid possible base-path evasion using ~paths. */
+                       logerror("'%s': Non-absolute path denied (base-path active)");
+                       return NULL;
+               }
+               snprintf(rpath, PATH_MAX, "%s%s", base_path, dir);
+               dir = rpath;
+       }
+
        path = enter_repo(dir, strict_paths);
 
        if (!path) {
@@ -639,6 +654,10 @@ int main(int argc, char **argv)
                        strict_paths = 1;
                        continue;
                }
+               if (!strncmp(arg, "--base-path=", 12)) {
+                       base_path = arg+12;
+                       continue;
+               }
                if (!strcmp(arg, "--")) {
                        ok_paths = &argv[i+1];
                        break;