feat(otep-4719): API impl for linux

Author: scottgerring

Cargo.toml

@@ -35,6 +35,8 @@ pin-project-lite = "0.2"
 prost = "0.14"
 rand = { version = "0.9", default-features = false }
 reqwest = { version = "0.13.1", default-features = false }
+rustix = { version = "1.1.4", default-features = false }
+serial_test = "3"
 serde = { version = "1.0", default-features = false }
 serde_json = "1.0"
 temp-env = "0.3.6"

opentelemetry-proto/Cargo.toml

@@ -44,7 +44,7 @@ metrics = ["opentelemetry/metrics", "opentelemetry_sdk/metrics"]
 logs = ["opentelemetry/logs", "opentelemetry_sdk/logs"]
 zpages = ["trace"]
 profiles = []
-process-context = []
+process-context = ["gen-tonic-messages", "rustix"]
 testing = ["opentelemetry/testing"]
 
 # add ons
@@ -62,12 +62,14 @@ schemars = { workspace = true, optional = true }
 serde = { workspace = true, optional = true, features = ["serde_derive", "std"] }
 const-hex = { workspace = true, optional = true }
 base64 = { workspace = true, optional = true }
+rustix = { workspace = true, optional = true, features = ["mm", "fs", "process", "time"] }
 
 [dev-dependencies]
 opentelemetry = { workspace = true, features = ["testing"] }
 tonic-prost-build = { workspace = true }
 tempfile = { workspace = true }
 serde_json = { workspace = true }
+serial_test = { workspace = true }
 
 [lints]
 workspace = true