From e2cd35e48dea40d8c2e3060474d645d6d2aa1d52 Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Fri, 3 Jan 2025 08:52:39 +0000
Subject: [PATCH] build: Require ELF interpreters

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 src/pakfire/build.c | 49 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/src/pakfire/build.c b/src/pakfire/build.c
index 5e5563da5..57ba341ab 100644
--- a/src/pakfire/build.c
+++ b/src/pakfire/build.c
@@ -34,6 +34,7 @@
 #include <pakfire/ctx.h>
 #include <pakfire/deps.h>
 #include <pakfire/dist.h>
+#include <pakfire/elf.h>
 #include <pakfire/env.h>
 #include <pakfire/file.h>
 #include <pakfire/i18n.h>
@@ -613,10 +614,45 @@ ERROR:
 	return r;
 }
 
+static int pakfire_build_find_elf_requires(
+		struct pakfire_ctx* ctx, struct pakfire_file* file, struct pakfire_find_deps_ctx* deps) {
+	struct pakfire_elf* elf = NULL;
+	int r;
+
+	// Try to open the ELF file
+	r = pakfire_elf_open_file(&elf, ctx, file);
+	if (r < 0) {
+		switch (-r) {
+			// This does not seem to be an ELF file
+			case ENOTSUP:
+				return 0;
+
+			// Raise any other errors
+			default:
+				goto ERROR;
+		}
+	}
+
+	// Fetch the interpreter
+	const char* interpreter = pakfire_elf_interpreter(elf);
+	if (interpreter) {
+		r = pakfire_package_add_dep(deps->pkg, PAKFIRE_PKG_REQUIRES, "%s", interpreter);
+		if (r < 0)
+			goto ERROR;
+	}
+
+ERROR:
+	if (elf)
+		pakfire_elf_unref(elf);
+
+	return r;
+}
+
 static int __pakfire_build_find_requires(
 		struct pakfire_ctx* ctx, struct pakfire_file* file, void* data) {
 	struct pakfire_find_deps_ctx* deps = data;
 	const char* path = NULL;
+	int r;
 
 	// Fetch the file path
 	path = pakfire_file_get_path(file);
@@ -632,9 +668,20 @@ static int __pakfire_build_find_requires(
 		return 0;
 
 	// Handle pkg-config files
-	if (pakfire_path_match("**.pc", path))
+	else if (pakfire_path_match("**.pc", path))
 		return pakfire_build_find_pkgconfig_requires(ctx, file, deps);
 
+	// Split certain file types differently
+	switch (pakfire_file_get_type(file)) {
+		// Regular files
+		case S_IFREG:
+			// Handle ELF files
+			r = pakfire_build_find_elf_requires(ctx, file, deps);
+			if (r < 0)
+				return r;
+			break;
+	}
+
 	return 0;
 }
 
-- 
2.47.2