Hi,
I was wondering if there's a command in Linux that would check to see if a CD is inserted into CD-rom.
I am developing a shell script that would copy a file from CD rom. For this, I have to first verify if the CD has been inserted or not.
Can anyone help me?
Thanks,
Sundeep (1 Reply)
Hi friends..
I hav a problem....
I dont know how to check .c files exists r not in a folder using IF in C shell script
actually i tried like this
if(=~ *.c)
even though some .c files or there in the current folder..it is not entering int o the if control statement...... (17 Replies)
Hi all,
I have copied all my files to one folder.and i want to check how many files (count) in the folder recently moved or total files in my folder?
please send me the query asap. (3 Replies)
i want to check the readability of a file inside the script.
when i use
if
then
echo the file "$sourcef" is not readable
else
echo something
fi
i am getting the error : f: unknown test operator
when i tried to check the availability with
if
i was... (3 Replies)
All,
I have a script where I get a filename as input and do some processing with the file that I got as input.
Requirement:
Now I have a requirement where I need to check the following:
If either of this goes wrong, the script should pop out a warning message.
I tried searching the... (6 Replies)
Hi I am having a problem to verify existence of files. I need to know whether or not files in a folder that begins with a name.
For example all files that start with The_File_ *.
I was doing it this way, but gives me error.
if text -f /work/The_File_*
then
...
else
..
fi (5 Replies)
New Unix user/scripter here. Been trying to solve a problem for two days now with no luck. Hoping someone here has an answer.
Essentially I have a list of wtmp files which I have decompressed and copied to a temporary directory. Using the following command I can turn them into a file than can... (4 Replies)
I have a folder with 100s of dat files, with delimiter "|", in some files they didn't provide this delimiter. how to automatically check those list of files in a folder which doesnt have a delimiter or string this way "|" is it possible?
Thank you very much for the helpful info. (3 Replies)
Hello.
I am comparing two binary file.
The first file is the source file. The second file is a modified version of the first one.
Modification concern uuid value.
Example
first file have multiple occurrences of 69a3604b-ac2b-43b7-af84-0a4a67fc6962 second file have the same occurence... (1 Reply)
Discussion started by: jcdole
1 Replies
LEARN ABOUT PHP
posix_access
POSIX_ACCESS(3) 1 POSIX_ACCESS(3)posix_access - Determine accessibility of a fileSYNOPSIS
bool posix_access (string $file, [int $mode = POSIX_F_OK])
DESCRIPTION posix_access(3) checks the user's permission of a file.
PARAMETERS
o $file
- The name of the file to be tested.
o $mode
- A mask consisting of one or more of POSIX_F_OK, POSIX_R_OK, POSIX_W_OK and POSIX_X_OK. POSIX_R_OK, POSIX_W_OK and POSIX_X_OK
request checking whether the file exists and has read, write and execute permissions, respectively. POSIX_F_OK just requests
checking for the existence of the file.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
posix_access(3) example
This example will check if the $file is readable and writable, otherwise will print an error message.
<?php
$file = 'some_file';
if (posix_access($file, POSIX_R_OK | POSIX_W_OK)) {
echo 'The file is readable and writable!';
} else {
$error = posix_get_last_error();
echo "Error $error: " . posix_strerror($error);
}
?>
NOTES
Note
When safe mode is enabled, PHP checks whether the files or directories being operated upon have the same UID (owner) as the script
that is being executed.
SEE ALSO posix_get_last_error(3), posix_strerror(3).
PHP Documentation Group POSIX_ACCESS(3)