Re: HP-UX 11i how to retrieve long command line of process with C

From: Mike Stroyan (stroyan_at_hpstryn.fc.hp.com)
Date: 06/25/04

  • Next message: Greg Cagle: "Re: Install Tree Foo" 
    Date: Fri, 25 Jun 2004 19:58:42 GMT

    Mike Arnold <marnol01@mail.win.org> wrote:
    |Under HP-UX 11i (and apparently 11.0 with patches PHKL_28202,
    |PHKL_26008, and PHCO_26274), the -x option of the ps command can
    |display 1020 characters of the command line of a process, a vast
    |improvement compared to the previous 63-character limit.

    |Does anyone know the underlying C statements to accomplish this? All
    |my attempts to use pstat_getproc(2) still return only 63 characters,
    |and the pst_cmd element of the pst_status structure is still defined
    |as only 64 characters (via PST_CLEN). Recently, I received a hint
    |that I might have to use the UNIX95 environment variable. If that is
    |true, then I must be using it incorrectly because it hasn't helped.

    A patched ps on 11i v1 uses pstat_getcommandline(). That is not
    available as a documented and supported interface until 11i v1.6 or 11i v2.
    You can read about the call in the system calls section of
    http://www.docs.hp.com./hpux/onlinedocs/B2355-60103/B2355-60103.html

    Here is an example using an unsupported interface on HP-UX 11.11 from
    http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=349348

    #include <sys/pstat.h>
    #include <sys/pstat/pstat_ops.h>
    #define MAX_LENGTH (1024)
    main (argc, argv) int argc; char *argv[]; {
        int pid;
        char long_command [MAX_LENGTH];
        union pstun pu;

        pid = atoi(argv[1]);
        pu.pst_command = long_command;
        if (pstat(PSTAT_GETCOMMANDLINE, pu, MAX_LENGTH, 1, pid) == -1) {
            printf("ERROR: pstat() failure using pid(%d)\n", pid);
            exit(-1);
        }
        printf("pid %d = %s\n", pid, pu.pst_command);
    } 

    -- 
Mike Stroyan, mike.stroyan@hp.com
  • Next message: Greg Cagle: "Re: Install Tree Foo"

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