expr: Don't use reftime for -ls

reftime is part of a different union than the print actions are supposed
to use.

src/ctx.c

@@ -23,6 +23,7 @@
 #include "pwcache.h"
 #include "stat.h"
 #include "trie.h"
+#include "xtime.h"
 #include <assert.h>
 #include <errno.h>
 #include <limits.h>
@@ -109,6 +110,10 @@ struct bfs_ctx *bfs_ctx_new(void) {
 		goto fail;
 	}
 
+	if (xgettime(&ctx->now) != 0) {
+		goto fail;
+	}
+
 	return ctx;
 
 fail:

src/ctx.h

@@ -26,6 +26,7 @@
 #include <stdbool.h>
 #include <stddef.h>
 #include <sys/resource.h>
+#include <time.h>
 
 /**
  * Various debugging flags.
@@ -127,6 +128,9 @@ struct bfs_ctx {
 	rlim_t nofile_soft;
 	/** The initial RLIMIT_NOFILE hard limit. */
 	rlim_t nofile_hard;
+
+	/** The current time. */
+	struct timespec now;
 };
 
 /**

src/eval.c

@@ -708,7 +708,7 @@ bool eval_fls(const struct bfs_expr *expr, struct bfs_eval *state) {
 	}
 
 	time_t time = statbuf->mtime.tv_sec;
-	time_t now = expr->reftime.tv_sec;
+	time_t now = ctx->now.tv_sec;
 	time_t six_months_ago = now - 6*30*24*60*60;
 	time_t tomorrow = now + 24*60*60;
 	struct tm tm;

src/parse.c

@@ -284,7 +284,7 @@ struct parser_state {
 	/** An "-ok"-type expression, if any. */
 	const struct bfs_expr *ok_expr;
 
-	/** The current time. */
+	/** The current time (maybe modified by -daystart). */
 	struct timespec now;
 };
 
@@ -1527,7 +1527,6 @@ static struct bfs_expr *parse_fls(struct parser_state *state, int arg1, int arg2
 
 	expr_set_always_true(expr);
 	expr->cost = PRINT_COST;
-	expr->reftime = state->now;
 	return expr;
 
 fail:
@@ -1772,7 +1771,6 @@ static struct bfs_expr *parse_ls(struct parser_state *state, int arg1, int arg2)
 	}
 
 	init_print_expr(state, expr);
-	expr->reftime = state->now;
 	return expr;
 }
 
@@ -3892,18 +3890,14 @@ struct bfs_ctx *bfs_parse_cmdline(int argc, char *argv[]) {
 		.files0_arg = NULL,
 		.files0_stdin_arg = NULL,
 		.ok_expr = NULL,
+		.now = ctx->now,
 	};
 
 	if (strcmp(xbasename(state.command), "find") == 0) {
 		// Operate depth-first when invoked as "find"
 		ctx->strategy = BFTW_DFS;
 	}
 
-	if (xgettime(&state.now) != 0) {
-		parse_perror(&state, "xgettime()");
-		goto fail;
-	}
-
 	ctx->exclude = &bfs_false;
 	ctx->expr = parse_whole_expr(&state);
 	if (!ctx->expr) {