Ethan Rosenberg, PhD
/Pres/CEO/
*Hygeia Biomedical Research, Inc*
2 Cameo Ridge Road
Monsey, NY 10952
T: 845 352-3908
F: 845 352-7566
erosenberg@xxxxxxxxxxxxxxxxxxxx
On 08/26/2013 07:33 PM, David Robley wrote:
Ethan Rosenberg wrote:
On 08/26/2013 11:36 AM, marco@xxxxxxxxxx wrote:
Tamara Temple <tamouse.lists@xxxxxxxxx> hat am 26. August 2013 um 08:33
geschrieben:
On Aug 25, 2013, at 10:41 PM, Ethan Rosenberg
<erosenberg@xxxxxxxxxxxxxxxxxxxx> wrote:
Dear List -
I'm lost on this one -
This works -
$out = system("ls -l ",$retvals);
printf("%s", $out);
This does -
echo exec("ls -l");
Please show the output of the directory listing.
Please us "ls -la"
This does not -
if( !file_exists("/var/www/orders.txt"));
{
$out = system("touch /var/www/orders.txt", $ret);
Maybe you don't have write permissions on the folder?
$out2 = system("chmod 766 /var/www/orders.txt", $ret);
echo 'file2<br />';
echo file_exists("/var/www/orders.txt");
}
and this does not -
if( !file_exists("/var/www/orders.txt"));
{
exec("touch /var/www/orders.txt");
exec("chmod 766 /var/www/orders.txt");
echo 'file2<br />';
echo file_exists("/var/www/orders.txt");
}
Ethan
When you say "does not work", can you show what is actually not working?
I believe the exec and system functions are likely working just fine,
but that the commands you've passed to them may not be.
--
Marco Behnke
Dipl. Informatiker (FH), SAE Audio Engineer Diploma
Zend Certified Engineer PHP 5.3
Tel.: 0174 / 9722336
e-Mail: marco@xxxxxxxxxx
Softwaretechnik Behnke
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Tamara -
> Please show the output of the directory listing.
> Please us "ls -la"
echo exec('ls -la orders.txt');
-rw-rw-rw- 1 ethan ethan 43 Aug 25 23:50 orders.txt
Maybe you don't have write permissions on the folder?
If I perform the touch and chmod from the command line, everything works.
>> When you say "does not work", can you show what is actually not
working? I
>> believe the exec and system functions are likely working just fine,
but that
>> the commands you've passed to them may not be.
Here are my commands.
if( !file_exists("/var/www/orders.txt"));
{
echo system("touch /var/www/orders.txt", $ret);
echo system("chmod 766 /var/www/orders.txt", $ret);
echo 'file2<br />';
echo file_exists("/var/www/orders.txt");
}
If I now try a ls from the command line, the return is
cannot access /var/www/orders.txt: No such file or directory
The ls -la works because the file was created from the command line.
TIA
Ethan
Note that touch and chmod don't return any output, so echoing the result of
a system call for those commands will give an empty string.
You should be checking the values of $ret for each execution of system to
see whether the command was successful or not - the return status of the
executed command will be written to this variable. I'd guess that touch is
returning 13 - permission denied.
if( !file_exists("/var/www/orders.txt"))
{
system("touch /var/www/orders.txt", $ret1);
echo 'touch returned '.$ret1.'<br> /';
system("chmod 766 /var/www/orders.txt", $ret2);
echo 'chmod returned ' .$ret2.'<br> /';
echo 'file2<br />';
echo file_exists("/var/www/orders.txt"); }
Check the permissions for directory /var/www; you'll probably find it is
writable by the user you log on as, but not by the user that apache/php runs
as, which is often www - a user with limited privileges.
As other(s) have pointed out, there are php functions to do what you want
without introducing the possible insecurities involved with system et al.
David -
touch returned 1
/chmod returned 1
rosenberg:/var/www# ls orders.txt
ls: cannot access orders.txt: No such file or directory
rosenberg:/var# ls -ld www
drwxr-xr-x 37 ethan ethan 20480 Aug 26 20:15 www
TIA
Ethan
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