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posix_spawn

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

namespace HH\Lib\OS;

function posix_spawn(
  string $file,
  posix_spawn_file_actions_t $file_actions,
  posix_spawnattr_t $attributes,
  vec<string> $argv,
  vec<string> $envp,
): pid_t;

Parameters​

  • string $file
  • posix_spawn_file_actions_t $file_actions
  • posix_spawnattr_t $attributes
  • vec<string> $argv
  • vec<string> $envp

Returns​

  • pid_t