fix uprobe programs

Signed-off-by: Dmitry Savintsev <dsavints@gmail.com>

{{project-name}}/Cargo.toml

@@ -13,7 +13,9 @@ clap = { version = "4.1", features = ["derive"] }
 {{project-name}}-common = { path = "../{{project-name}}-common", features = ["user"] }
 anyhow = "1.0.68"
 env_logger = "0.10"
+{%- if program_type == "uprobe" %}
 libc = "0.2"
+{%- endif %}
 log = "0.4"
 tokio = { version = "1.24", features = ["macros", "rt", "rt-multi-thread", "net", "signal"] }
 

{{project-name}}/src/main.rs

@@ -59,7 +59,7 @@ struct Opt {
     cgroup_path: String,
 {% elsif program_type == "uprobe" or program_type == "uretprobe" %}
     #[clap(short, long)]
-    pid: Option<i32>
+    pid: Option<i32>,
 {% endif -%}
 }
 
@@ -105,7 +105,7 @@ async fn main() -> Result<(), anyhow::Error> {
     {%- when "uprobe", "uretprobe" -%}
     let program: &mut UProbe = bpf.program_mut("{{crate_name}}").unwrap().try_into()?;
     program.load()?;
-    program.attach(Some("{{uprobe_fn_name}}"), 0, "{{uprobe_target}}", opt.pid.try_into()?)?;
+    program.attach(Some("{{uprobe_fn_name}}"), 0, "{{uprobe_target}}", opt.pid)?;
     {%- when "sock_ops" -%}
     let program: &mut SockOps = bpf.program_mut("{{crate_name}}").unwrap().try_into()?;
     let cgroup = std::fs::File::open(opt.cgroup_path)?;