Date: Wed, 23 Oct 2002 14:56:46 -0700 (PDT) From: Chris BeHanna <behanna@zbzoom.net> To: freebsd-gnats-submit@FreeBSD.org Subject: standards/44425: getcwd() succeeds even if current dir has perm 000. Message-ID: <200210232156.g9NLukQY020603@www.freebsd.org>
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>Number: 44425
>Category: standards
>Synopsis: getcwd() succeeds even if current dir has perm 000.
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-standards
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Oct 23 15:00:10 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Chris BeHanna
>Release: 4.7
>Organization:
>Environment:
FreeBSD topperwein.pennasoft.com 4.7-STABLE FreeBSD 4.7-STABLE #0: Mon Oct 21 14:19:21 EDT 2002 behanna@topperwein.pennasoft.com:/raid0/usr/src/sys/TOPPERWEIN i386
>Description:
POSIX requires that getcwd() return EACCES if any component of the
pathname lacks either read or search permission; however, even in a
directory for which the permissions mask is 000, getcwd() succeeds.
>How-To-Repeat:
Compile the following program:
/*
* getcwd bug demo
*/
#include <sys/param.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
int
main(int argc, char* argv[])
{
char* retbuf;
if ((retbuf = getcwd(NULL, MAXPATHLEN+1)) == NULL) {
fprintf(stderr, "getcwd() failed: errno = %d (%s)\n",
errno,
strerror(errno));
exit(1);
}
printf("%s\n", retbuf);
free(retbuf);
exit(0);
}
as, say gcc -o /tmp/t t.c
then do the following:
mkdir foo
cd foo
chmod 000 .
/tmp/t
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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