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Date: Fri,  9 Jun 2000 08:04:19 -0700 (PDT)
From: billh@europe.yahoo-inc.com
To: freebsd-gnats-submit@FreeBSD.org
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Subject: bin/19145: ps not annotatable in 4.0
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>Number:         19145
>Category:       bin
>Synopsis:       ps not annotatable in 4.0
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jun 09 08:10:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Bill Hails
>Release:        4.0
>Organization:
Yahoo! Europe
>Environment:
FreeBSD pagegen7.europe.yahoo.com 4.0-YAHOO-20000510 FreeBSD 4.0-YAHOO-20000510 #0: Thu May 11 00:39:30 PDT 2000     root@fb40.yahoo.com:/home/src/sys/compile/YAHOO  i386

>Description:
the kvm_getargv function returns the original argv passed to the
process, ignoring any changes that the process may have made to
ARGV, in conflict with the manual page.
>How-To-Repeat:
create this C program, call it getargv.c, and compile with
cc -O -pipe  getargv.c  -lkvm -o getargv
#include <fcntl.h>
#include <kvm.h>
#include <sys/param.h>
#include <sys/user.h>
#include <sys/sysctl.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
    kvm_t *kd;

    kd = kvm_open(NULL, "/dev/mem", NULL, O_RDONLY, "kvm_open:");

    if (kd != NULL) {
        int cnt;
        struct kinfo_proc *p = kvm_getprocs(kd, KERN_PROC_ALL, 0, &cnt);

        if (p != NULL) {
            int c;
            for (c = 0; c < cnt; ++c) {
                char **res = kvm_getargv(kd, p, 0);
                if (res) {
                    while (*res) {
                        printf("%s ", *res);
                        res++;
                    }
                    printf("\n");
                }
                else break;
                ++p;
            }
        } else {
            return(2);
        }
        kvm_close(kd);
    } else {
        return(1);
    }
    return(0);
}

then compile and run the following (call it argv0.c, "make argv0")

int main(int argc, char *argv[])
{
        argv[0] = "test";
        sleep(500);
        return(0);
}

in another window run the already compiled getargv as root.
When I do this I see that the argv0 process has not had its
ARGV[0] changed
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:


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