[nycbug-talk] FreeBSD Standard Exit Codes

[Matthew Story]

By way of .ike ... the following standard error codes have just been
brought to my attention ... pretty sweet

/* from head/includes/sysexits.h */
#define EX_USAGE        64      /* command line usage error */
#define EX_DATAERR      65      /* data format error */
#define EX_NOINPUT      66      /* cannot open input */
#define EX_NOUSER       67      /* addressee unknown */
#define EX_NOHOST       68      /* host name unknown */
#define EX_UNAVAILABLE  69      /* service unavailable */
#define EX_SOFTWARE     70      /* internal software error */
#define EX_OSERR        71      /* system error (e.g., can't fork) */
#define EX_OSFILE       72      /* critical OS file missing */
#define EX_CANTCREAT    73      /* can't create (user) output file */
#define EX_IOERR        74      /* input/output error */
#define EX_TEMPFAIL     75      /* temp failure; user is invited to retry */
#define EX_PROTOCOL     76      /* remote error in protocol */
#define EX_NOPERM       77      /* permission denied */
#define EX_CONFIG       78      /* configuration error */

Looks like bin/, usr.bin/ and usr.sbin/ executables all make use of these
exit codes correctly, wonder if anyone is doing anything with these, or
makes use of this standard in their programs.  Only thing missing here is a
helper program for sh(1) to determine exit meaningfulness from exit code:

if causedexit $? USAGE DATAERR; then
    # ...
elif causedexit $? NOUSER NOHOST; then
    # ...
fi # etc ...

-- 
regards,
matt
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