From 8f6b0c1b360f2fea3f7f6563808513cbdd51df80 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Wed, 10 Apr 2024 10:10:51 -0400
Subject: Implement -context

Closes: https://github.com/tavianator/bfs/issues/27
---
 src/eval.c | 43 +++++++++++++++++++++++++++++--------------
 1 file changed, 29 insertions(+), 14 deletions(-)

(limited to 'src/eval.c')

diff --git a/src/eval.c b/src/eval.c
index 2f06858..d0112c2 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -145,6 +145,20 @@ bool bfs_expr_cmp(const struct bfs_expr *expr, long long n) {
 	return false;
 }
 
+/** Common code for fnmatch() tests. */
+static bool eval_fnmatch(const struct bfs_expr *expr, const char *str) {
+	if (expr->literal) {
+#ifdef FNM_CASEFOLD
+		if (expr->fnm_flags & FNM_CASEFOLD) {
+			return strcasecmp(expr->pattern, str) == 0;
+		}
+#endif
+		return strcmp(expr->pattern, str) == 0;
+	} else {
+		return fnmatch(expr->pattern, str, expr->fnm_flags) == 0;
+	}
+}
+
 /**
  * -true test.
  */
@@ -193,6 +207,21 @@ bool eval_capable(const struct bfs_expr *expr, struct bfs_eval *state) {
 	}
 }
 
+/**
+ * -context test.
+ */
+bool eval_context(const struct bfs_expr *expr, struct bfs_eval *state) {
+	char *con = bfs_getfilecon(state->ftwbuf);
+	if (!con) {
+		eval_report_error(state);
+		return false;
+	}
+
+	bool ret = eval_fnmatch(expr, con);
+	bfs_freecon(con);
+	return ret;
+}
+
 /**
  * Get the given timespec field out of a stat buffer.
  */
@@ -546,20 +575,6 @@ bool eval_links(const struct bfs_expr *expr, struct bfs_eval *state) {
 	return bfs_expr_cmp(expr, statbuf->nlink);
 }
 
-/** Common code for fnmatch() tests. */
-static bool eval_fnmatch(const struct bfs_expr *expr, const char *str) {
-	if (expr->literal) {
-#ifdef FNM_CASEFOLD
-		if (expr->fnm_flags & FNM_CASEFOLD) {
-			return strcasecmp(expr->pattern, str) == 0;
-		}
-#endif
-		return strcmp(expr->pattern, str) == 0;
-	} else {
-		return fnmatch(expr->pattern, str, expr->fnm_flags) == 0;
-	}
-}
-
 /**
  * -i?lname test.
  */
-- 
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