зарегистрировать функцию, которая будет вызываться при нормальном завершении процесса (register a function to be called at normal process termination)
Имя (Name)
on_exit - register a function to be called at normal process
termination
Синопсис (Synopsis)
#include <stdlib.h>
int on_exit(void (*function)(int, void *), void *arg);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
on_exit():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE || _SVID_SOURCE
Описание (Description)
The on_exit() function registers the given function to be called
at normal process termination, whether via exit(3) or via return
from the program's main(). The function is passed the status
argument given to the last call to exit(3) and the arg argument
from on_exit().
The same function may be registered multiple times: it is called
once for each registration.
When a child process is created via fork(2), it inherits copies
of its parent's registrations. Upon a successful call to one of
the exec(3) functions, all registrations are removed.
Возвращаемое значение (Return value)
The on_exit() function returns the value 0 if successful;
otherwise it returns a nonzero value.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│on_exit() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Стандарты (Conforming to)
This function comes from SunOS 4, but is also present in glibc.
It no longer occurs in Solaris (SunOS 5). Portable application
should avoid this function, and use the standard atexit(3)
instead.
Примечание (Note)
By the time function is executed, stack (auto) variables may
already have gone out of scope. Therefore, arg should not be a
pointer to a stack variable; it may however be a pointer to a
heap variable or a global variable.
Смотри также (See also)
_exit(2), atexit(3), exit(3)
