Mail Archives: cygwin/2011/08/01/08:25:18
On Aug 1 13:58, Denis Excoffier wrote:
>
> Hello,
>
> I have a bash-4.2 (installed in /home/my), compiled with GCC 4.6.1
> directly from the sources. With this one, the following script:
>
> ---------------------------------
> #!/home/my/bash-4.2
>
> rm -rf /tmp/xxx
> mkdir -p /tmp/xxx/folder1
> ln -s folder1 /tmp/xxx/folder
> if [ -d /tmp/xxx/folder ]; then echo folder; else echo no folder; fi
> if [ -x /tmp/xxx/folder ]; then echo execut; else echo no execut; fi
> exit
> ---------------------------------
>
> produces:
>
> folder
> no execut
>
> while the regular /bin/bash (4.1.10), with the same script:
>
> ---------------------------------
> #!/bin/bash
>
> rm -rf /tmp/xxx
> mkdir -p /tmp/xxx/folder1
> ln -s folder1 /tmp/xxx/folder
> if [ -d /tmp/xxx/folder ]; then echo folder; else echo no folder; fi
> if [ -x /tmp/xxx/folder ]; then echo execut; else echo no execut; fi
> exit
> ---------------------------------
>
> produces (correctly):
>
> folder
> execut
>
>
> Could be a bug in bash-4.2, but...
> i have noticed that it occurs only under the newest snapshots.
> The change occurred between the 2011-07-21 and 2011-07-29 snapshots.
>
> My current /proc/version | tr -d '@' is:
> CYGWIN_NT-5.1 version 1.7.10s(0.249/5/3) (cgf) (gcc version 4.3.4 20090804 (release) 1 (GCC) ) 20110801 00:02:52
>
> Could someone please have a look and reproduce this?
I can't since I have bash 4.1.10(4) from the distro installed. This is
a nice case where you would have to debug this yourself since you have
the binaries available to do it.
However, at a first glance I doubt this is a Cygwin bug. Consider:
- bash 4.1.10 returns "execut"
- /bin/test from coreustils returns "execut"
- My highly professional and streamlined testcase returns the correct
result:
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
void
my_access (const char *file, int flag, const char *fname, int effective)
{
int ret = effective ? access (file, flag) : eaccess (file, flag);
printf ("%saccess (%s, %s) = %d",
effective ? "e" : " ", file, fname, ret);
if (ret)
printf (" <%s>", strerror (errno));
fputc ('\n', stdout);
}
int
main (int argc, char**argv)
{
int eff;
if (argc > 1)
for (eff = 0; eff < 2; ++eff)
{
my_access (argv[1], F_OK, "F_OK", eff);
my_access (argv[1], R_OK, "R_OK", eff);
my_access (argv[1], W_OK, "W_OK", eff);
my_access (argv[1], X_OK, "X_OK", eff);
}
return 0;
}
$ gcc -g -o access access.c
$ ./access /tmp/xxx/folder
access (/tmp/xxx/folder, F_OK) = 0
access (/tmp/xxx/folder, R_OK) = 0
access (/tmp/xxx/folder, W_OK) = 0
access (/tmp/xxx/folder, X_OK) = 0
eaccess (/tmp/xxx/folder, F_OK) = 0
eaccess (/tmp/xxx/folder, R_OK) = 0
eaccess (/tmp/xxx/folder, W_OK) = 0
eaccess (/tmp/xxx/folder, X_OK) = 0
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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