порождать процесс (spawn a process)
Примечание (Note)
The housekeeping activities in the child are controlled by the
objects pointed to by attrp (for non-file actions) and
file_actions In POSIX parlance, the posix_spawnattr_t and
posix_spawn_file_actions_t data types are referred to as objects,
and their elements are not specified by name. Portable programs
should initialize these objects using only the POSIX-specified
functions. (In other words, although these objects may be
implemented as structures containing fields, portable programs
must avoid dependence on such implementation details.)
According to POSIX, it is unspecified whether fork handlers
established with pthread_atfork(3) are called when posix_spawn()
is invoked. Since glibc 2.24, the fork handlers are not executed
in any case. On older implementations, fork handlers are called
only if the child is created using fork(2).
There is no "posix_fspawn" function (i.e., a function that is to
posix_spawn() as fexecve(3) is to execve(2)). However, this
functionality can be obtained by specifying the path argument as
one of the files in the caller's /proc/self/fd directory.
