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Have the VMS exit code follow POSIX conventions

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It seems like the convention for VMS exit codes is to combine the VMS
C facility code (0x35a000) with a recoded exit code as follows:

    0     => 1
    1-255 => 8*code + 2

We also add 0x10000000, which is the control bit that has DCL not
report the error on the terminal.  That's just as well, since it would
be quite nonsensical, for example:

    %C-W-NOMSG, Message number 0035A018

We could do all this by using the normal exit() function after having
defined the macro _POSIX_EXIT.  Unfortunately, this feature only
exists in VMS C V7.1 and up.

Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Richard Levitte 2016-01-13 17:00:22 +01:00
parent b97c8c0ef2
commit c3944a9947
1 changed files with 8 additions and 0 deletions
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8
e_os.h
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@ -377,6 +377,13 @@ extern FILE *_imp___iob;
So, what we do here is to change 0 to 1 to get the default success status, So, what we do here is to change 0 to 1 to get the default success status,
and everything else is shifted up to fit into the status number field, and and everything else is shifted up to fit into the status number field, and
the status is tagged as an error, which I believe is what is wanted here. the status is tagged as an error, which I believe is what is wanted here.
Finally, we add the VMS C facility code 0x35a000, because there are some
programs, such as Perl, that will reinterpret the code back to something
POSIXly. 'man perlvms' explains it further.
NOTE: the perlvms manual wants to turn all codes 2 to 255 into success
codes (status type = 1). I couldn't disagree more. Fortunately, the
status type doesn't seem to bother Perl.
-- Richard Levitte -- Richard Levitte
*/ */
# define EXIT(n) do { int __VMS_EXIT = n; \ # define EXIT(n) do { int __VMS_EXIT = n; \
@ -385,6 +392,7 @@ extern FILE *_imp___iob;
else \ else \
__VMS_EXIT = (n << 3) | 2; \ __VMS_EXIT = (n << 3) | 2; \
__VMS_EXIT |= 0x10000000; \ __VMS_EXIT |= 0x10000000; \
__VMS_EXIT |= 0x35a000; \
exit(__VMS_EXIT); } while(0) exit(__VMS_EXIT); } while(0)
# define NO_SYS_PARAM_H # define NO_SYS_PARAM_H
# define NO_SYS_UN_H # define NO_SYS_UN_H