abort(3) Library Functions Manual abort(3) 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 sig- nal for a second time. RETURN VALUE The abort() function never returns. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │abort() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS SVr4, POSIX.1-2001, POSIX.1-2008, 4.3BSD, C99. NOTES Up until glibc 2.26, if the abort() function caused process termina- tion, all open streams were closed and flushed (as with fclose(3)). However, in some cases this could result in deadlocks and data corrup- tion. Therefore, starting with glibc 2.27, abort() terminates the process without flushing streams. POSIX.1 permits either possible be- havior, 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) Linux man-pages 6.03 2022-12-29 abort(3)
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