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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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abort(3) Library Functions Manual abort(3)
abort - cause abnormal process termination
Standard C library (libc, -lc)
#include <stdlib.h>
[[noreturn]] void abort(void);
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.
The abort() function never returns.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ abort() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
C11, POSIX.1-2008.
SVr4, POSIX.1-2001, 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".
gdb(1), sigaction(2), assert(3), exit(3), longjmp(3), raise(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
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2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
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Linux man-pages 6.15 2025-05-17 abort(3)
Pages that refer to this page: assert(3), assert_perror(3), mallopt(3), mcheck(3), stdio(3), signal(7), signal-safety(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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