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Top Forums UNIX for Beginners Questions & Answers How to check if a file is open in editor? Post 303005509 by Don Cragun on Wednesday 18th of October 2017 08:45:37 PM
Old 10-18-2017
Forget putting your code in a script!

What happens when you run the following commands directly in your shell:
Code:
gedit somefile& PID=$!
wait $PID

where somefile is the name of some file that you can edit? If this didn't work for you when run outside of a script, what makes you think it should work when you run it inside a script?

As I said in post #12 in this thread:
Quote:
How is it that you expect to edit a file when your editor is running in the background and can't read editing instructions from the terminal?
Jobs run in the background are blocked if they try to read from or write to their controlling terminal. The wait command that you are executing is not reporting that gedit terminated; it is reporting that gedit was stopped (probably by a SIGTTOU or SIGTTIN signal).

Maybe issuing the following command line in a shell would be instructive:
Code:
gedit somefile& PID=$!; sleep 10; jobs $PID; sleep 10; fg $PID

This User Gave Thanks to Don Cragun For This Post:
 

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CHMOD(3)								 1								  CHMOD(3)

chmod - Changes file mode

SYNOPSIS
bool chmod (string $filename, int $mode) DESCRIPTION
Attempts to change the mode of the specified file to that given in $mode. PARAMETERS
o $filename - Path to the file. o $mode - Note that $mode is not automatically assumed to be an octal value, so to ensure the expected operation, you need to prefix $mode with a zero (0). Strings such as "g+w" will not work properly. <?php chmod("/somedir/somefile", 755); // decimal; probably incorrect chmod("/somedir/somefile", "u+rwx,go+rx"); // string; incorrect chmod("/somedir/somefile", 0755); // octal; correct value of mode ?> man 1 chmod' and ' man 2 chmod'. <?php // Read and write for owner, nothing for everybody else chmod("/somedir/somefile", 0600); // Read and write for owner, read for everybody else chmod("/somedir/somefile", 0644); // Everything for owner, read and execute for others chmod("/somedir/somefile", 0755); // Everything for owner, read and execute for owner's group chmod("/somedir/somefile", 0750); ?> RETURN VALUES
Returns TRUE on success or FALSE on failure. NOTES
Note The current user is the user under which PHP runs. It is probably not the same user you use for normal shell or FTP access. The mode can be changed only by user who owns the file on most systems. Note This function will not work on remote files as the file to be examined must be accessible via the server's filesystem. Note When safe mode is enabled, PHP checks whether the files or directories you are about to operate on have the same UID (owner) as the script that is being executed. In addition, you cannot set the SUID, SGID and sticky bits. SEE ALSO
chown(3), chgrp(3), fileperms(3), stat(3). PHP Documentation Group CHMOD(3)
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