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Annotation of researchv10dc/man/adm/man3/exit.3, revision 1.1.1.1

1.1       root        1: .TH EXIT 3
                      2: .CT 2 proc_man
                      3: .SH NAME
                      4: exit, onexit \(mi terminate process
                      5: .SH SYNOPSIS
                      6: .nf
                      7: .B void exit(status)
                      8: .B int status;
                      9: .PP
                     10: .B int onexit(fn)
                     11: .B int (*fn)();
                     12: .fi
                     13: .SH DESCRIPTION
                     14: .I Exit
                     15: is the conventional way to terminate a process.
                     16: Before calling
                     17: .I _exit
                     18: (see
                     19: .IR exit (2))
                     20: with
                     21: .I status
                     22: as an argument,
                     23: it calls in reverse order all the functions
                     24: recorded by
                     25: .IR onexit .
                     26: .PP
                     27: .I Exit
                     28: can never return.
                     29: .PP
                     30: .I Onexit
                     31: records
                     32: .I fn
                     33: as a function to be called by
                     34: .IR exit .
                     35: It returns zero if it failed,
                     36: nonzero otherwise.
                     37: Typical uses include cleanup routines for
                     38: .IR stdio (3)
                     39: and profiling; see
                     40: .IR monitor (3).
                     41: .PP
                     42: Calling
                     43: .I onexit
                     44: twice (or more) with the same function argument causes
                     45: .I exit
                     46: to invoke the function twice (or more).
                     47: .PP
                     48: The function
                     49: .I fn
                     50: should be declared as
                     51: .EX
                     52:        int fn()
                     53: .EE
                     54: .PP
                     55: The constant
                     56: .B NONEXIT
                     57: defined in
                     58: .B <libc.h>
                     59: determines how many functions can be recorded.
                     60: .SH "SEE ALSO"
                     61: .IR exit (2)

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