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executor: expose file descriptors inside action sandboxes #37

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executor: expose file descriptors inside action sandboxes #37

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4 changes: 4 additions & 0 deletions src/action_executor.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -2110,6 +2110,7 @@ fn createOutputParent(io: std.Io, work_root: std.Io.Dir, path: []const u8) !void

fn prepareChrootBaseDirs(io: std.Io, chroot_root: std.Io.Dir) !void {
try chroot_root.createDirPath(io, "dev");
try chroot_root.symLink(io, "/proc/self/fd", "dev/fd", .{ .is_directory = true });
try chroot_root.createDirPath(io, "proc");
try chroot_root.createDirPath(io, "tmp");
try chroot_root.createDirPath(io, "var/tmp");
Expand Down Expand Up @@ -3641,6 +3642,9 @@ test "prepareChrootBaseDirs creates temporary directories" {
defer work_dir.close(std.testing.io);

try prepareChrootBaseDirs(std.testing.io, work_dir);
var descriptor_target: [64]u8 = undefined;
const descriptor_target_len = try work_dir.readLink(std.testing.io, "dev/fd", &descriptor_target);
try std.testing.expectEqualStrings("/proc/self/fd", descriptor_target[0..descriptor_target_len]);
try work_dir.access(std.testing.io, "tmp", .{});
try work_dir.access(std.testing.io, "var/tmp", .{});
}