# HG changeset patch
# User Paper <mrpapersonic@gmail.com>
# Date 1700286869 18000
# Node ID 99fdf5a90b0f8a8a4c58c1c06a064a067495cc88
# Parent  44c5e6dd94885b9c8c347a70a783e613e0b9f0ff
fd/linux: avoid reading buffers multiple times

diff -r 44c5e6dd9488 -r 99fdf5a90b0f dep/animia/src/fd/linux.cc
--- a/dep/animia/src/fd/linux.cc	Sat Nov 18 00:47:40 2023 -0500
+++ b/dep/animia/src/fd/linux.cc	Sat Nov 18 00:54:29 2023 -0500
@@ -52,21 +52,16 @@
 
 static bool AreFlagsOk(pid_t pid, int fd) {
 	const std::string path = PROC_LOCATION "/" + std::to_string(pid) + "/fdinfo/" + std::to_string(fd);
-	std::stringstream buffer;
-	{
-		std::string data;
-		if (!util::ReadFile(path, data))
-			return false;
-		buffer << data;
-	}
+
+	std::ifstream file(path.c_str());
+	if (!file)
+		return false;
 
 	int flags = 0;
-	for (std::string line; std::getline(buffer, line);) {
-		/* FIXME: exception handling here!! */
-		if (line.rfind("flags:", 0) == 0) {
+	for (std::string line; std::getline(file, line); )
+		if (line.find("flags:", 0) == 0)
 			flags = std::stoi(line.substr(line.find_last_not_of("0123456789") + 1));
-		}
-	}
+
 	if (flags & O_WRONLY || flags & O_RDWR)
 		return false;
 	return true;