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.\" Modified 1993-07-24, Rik Faith (faith@cs.unc.edu)
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.\" Modified 2003-10-25, Walter Harms
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.TH ATEXIT 3 2003-11-01 "Linux" "Linux Programmer's Manual"
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.TH ATEXIT 3 2008-12-05 "Linux" "Linux Programmer's Manual"
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atexit \- register a function to be called at normal process termination
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or via return from the program's \fImain\fP().
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Functions so registered are called in
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the reverse order of their registration; no arguments are passed.
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The same function may be registered multiple times:
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it is called once for each registration.
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POSIX.1-2001 requires that an implementation allow at least
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are not called if a process terminates abnormally because
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of the delivery of a signal.
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If one of the functions registered functions calls
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then any remaining functions are not invoked,
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and the other process termination steps performed by
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POSIX.1-2001 says that the result of calling
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more than once (i.e., calling
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within a function registered using
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On some systems (but not Linux), this can result in an infinite recursion;
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.\" This can happen on OpenBSD 4.2 for example, and is documented
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.\" as occurring on FreeBSD as well.
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.\" Glibc does "the Right Thing" -- invocation of the remaining
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.\" exit handlers carries on as normal.
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portable programs should not invoke
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inside a function registered using
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functions register functions on the same list:
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at normal process termination,
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the registered functions are invoked in reverse order
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of their registration by these two functions.
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POSIX.1-2001 says that the result is undefined if
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is used to terminate execution of one of the functions registered
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.\" In glibc, things seem to be handled okay
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Since glibc 2.2.3,
added
removed
man3/atexit.3
