порождать процесс (РАСШИРЕННОЕ РЕАЛЬНОЕ ВРЕМЯ) (spawn a process (ADVANCED REALTIME))
Ошибки (Error)
These functions may fail if:
EINVAL The value specified by file_actions or attrp is invalid.
If this error occurs after the calling process successfully
returns from the posix_spawn() or posix_spawnp() function, the
child process may exit with exit status 127.
If posix_spawn() or posix_spawnp() fail for any of the reasons
that would cause fork() or one of the exec family of functions to
fail, an error value shall be returned as described by fork() and
exec, respectively (or, if the error occurs after the calling
process successfully returns, the child process shall exit with
exit status 127).
If POSIX_SPAWN_SETPGROUP is set in the spawn-flags attribute of
the object referenced by attrp, and posix_spawn() or
posix_spawnp() fails while changing the child's process group, an
error value shall be returned as described by setpgid() (or, if
the error occurs after the calling process successfully returns,
the child process shall exit with exit status 127).
If POSIX_SPAWN_SETSCHEDPARAM is set and POSIX_SPAWN_SETSCHEDULER
is not set in the spawn-flags attribute of the object referenced
by attrp, then if posix_spawn() or posix_spawnp() fails for any
of the reasons that would cause sched_setparam() to fail, an
error value shall be returned as described by sched_setparam()
(or, if the error occurs after the calling process successfully
returns, the child process shall exit with exit status 127).
If POSIX_SPAWN_SETSCHEDULER is set in the spawn-flags attribute
of the object referenced by attrp, and if posix_spawn() or
posix_spawnp() fails for any of the reasons that would cause
sched_setscheduler() to fail, an error value shall be returned as
described by sched_setscheduler() (or, if the error occurs after
the calling process successfully returns, the child process shall
exit with exit status 127).
If the file_actions argument is not NULL, and specifies any
close, dup2, or open actions to be performed, and if
posix_spawn() or posix_spawnp() fails for any of the reasons that
would cause close(), dup2(), or open() to fail, an error value
shall be returned as described by close(), dup2(), and open(),
respectively (or, if the error occurs after the calling process
successfully returns, the child process shall exit with exit
status 127). An open file action may, by itself, result in any of
the errors described by close() or dup2(), in addition to those
described by open().
The following sections are informative.
