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| -rw-r--r-- | multihome.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/multihome.c b/multihome.c index 9daa216..23123c1 100644 --- a/multihome.c +++ b/multihome.c @@ -438,6 +438,13 @@ int main(int argc, char *argv[]) { sprintf(multihome.path_topdir, "%s/topdir", multihome.path_new); sprintf(multihome.marker, "%s/.multihome_controlled", multihome.path_new); + // Refuse to operate within a controlled home directory + char already_inside[PATH_MAX]; + sprintf(already_inside, "%s/.multihome_controlled", multihome.path_old); + if (access(already_inside, F_OK) == 0) { + fprintf(stderr, "error: cannot be nested.\n"); + return 1; + } // Create new home directory if (strcmp(multihome.path_new, multihome.path_old) != 0) { |