abort
Section: C Library Functions (3)
Updated: 202-0-08
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NAME
abort - cause abnormal process termination
LIBRARY
Standard C library
(
libc,~
-lc)
SYNOPSIS
#include <stdlib.h>
[[noreturn]] void abort(void);
DESCRIPTION
The
abort()
function first unblocks the
SIGABRT
signal, and then raises that signal for the calling process
(as though
raise(3)
was called).
This results in the abnormal termination of the process unless the
SIGABRT
signal is caught and the signal handler does not return
(see
longjmp(3)).
If the
SIGABRT
signal is ignored, or caught by a handler that returns, the
abort()
function will still terminate the process.
It does this by restoring the default disposition for
SIGABRT
and then raising the signal for a second time.
As with other cases of abnormal termination the functions registered with
atexit(3)
and
on_exit(3)
are not called.
RETURN VALUE
The
abort()
function never returns.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
abort()
| Thread safety | M-Safe
|
STANDARDS
C11, POSIX.-2008.
HISTORY
SVr4, POSIX.-2001, 4.3BSD, C89.
Up until glibc 2.26,
if the
abort()
function caused process termination,
all open streams were closed and flushed (as with
fclose(3)).
However, in some cases this could result in deadlocks and data corruption.
Therefore, starting with glibc 2.27,
abort()
terminates the process without flushing streams.
POSIX.1 permits either possible behavior, saying that
abort()
"may include an attempt to effect fclose() on all open streams".
SEE ALSO
gdb(1),
sigaction(2),
assert(3),
exit(3),
longjmp(3),
raise(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- HISTORY
-
- SEE ALSO
-
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