On 3/12/2020 11:12 pm, Charles Mills wrote:
I believe you, but why then is the macro undefined? Why is the definition now
commented out?
From <limits.h> (actually CEE.SCEEH.H(LIMITS)) on z/OS V2R4:
For the usual POSIX compliance reasons <sigh>!
FWIW, in IBM z/OS C++ code that's used by the JVM they set PATH_MAX to
1024
*https://github.com/eclipse/omr/blob/c3c479f9d5958df679349d0e02ed204329fda2da/port/unix/omrsysinfo.c#L181*
/*
* POSIX.1 1990 Section 2.8.5 Statement 1065 -
* these macros "shall be omitted on specific
* implementations where the corresonding value is
* >= the stated minimum, but where the value
* can vary depending on the file to which it is
* applied."
*
*
*/
/*
* #define LINK_MAX
* #define MAX_CANON
* #define MAX_INPUT
* #define NAME_MAX
* #define PATH_MAX
* #define PIPE_BUF
*/
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of David Crayford
Sent: Thursday, December 3, 2020 5:32 AM
To: [email protected]
Subject: Re: C macro for maximum path length?
PATH_MAX on z/OS is 1023. This is documented in lots of error messages and BPX
assembler services.
On 3 Dec 2020, at 7:16 am, Charles Mills <[email protected]> wrote:
I have some code that compiles both under Windows Visual Studio and z/OS
XLC.
In Windows the maximum length of a file path is defined by _MAX_PATH and
__MAX_PATH (I guess MS thinks two macros are better than one).
What is the equivalent macro for XLC? Failing that, what *is* the maximum
path length so I can define my own macro?
Posix defines PATH_MAX and I see references to it in the z/OS doc but it
does not seem to be defined for my compile. How do I pick that up? And yes,
I have
#define _XOPEN_SOURCE_EXTENDED 1
#include <stdlib.h>
z/OS V2R4
Thanks,
Charles
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