ctx: Flush the user/group caches when executing commands

This fixes (admittedly uncommon) commands like

    $ bfs -nouser -exec add-missing-user.sh {} \;

1 files changed, 5 insertions, 0 deletions

diff --git a/src/ctx.c b/src/ctx.c
index 8d80691..4b373a1 100644
--- a/src/ctx.c
+++ b/src/ctx.c
@@ -186,6 +186,11 @@ void bfs_ctx_flush(const struct bfs_ctx *ctx) {
 	// We do not check errors here, but they will be caught at cleanup time
 	// with ferror().
 	fflush(NULL);
+
+	// Flush the user/group caches, in case the executed command edits the
+	// user/group tables
+	bfs_users_flush(ctx->users);
+	bfs_groups_flush(ctx->groups);
 }
 
 /** Flush a file and report any errors. */