In UNIX: use function chmod
make systemdoc ro
In general, you can delete a read-only file the same way you delete any other file. The only difference is that the operating system will ask you to confirm that you if you are sure. If you want to make a read-only file writable, just right-click the file and select properties. Then, un-check the read-only box. Unfortunately, deleting a file from a CD is another story. Most CD's are read only and you can't delete anything from them. The exception to this is a CD/RW. If you recorded the CD yourself on a rewritable CD, then you should be able delete the file. Otherwise, it is not possible.
sure
Right click the PDF file, click properties, in general tab, check the box of "read only" then click "apply" before sending it to anywhere you want.
Read, write, execute, and functions in software objects.
People can not make unauthorised changes to a file on a shared network.
To change a read only file into a read write file, first find the file to be edited. Then right click the file and click on properties. Next, click the general tab and clear the read only check box. Lastly, click on the OK button.
You mean read from file/standard input? With function fgets.
Can I change a "read only" file from Adobe to a word document?
You can use security options to save a file as read only. You can also set a password on the document.
To change your Excel spreadsheet from read-only, first, check if the file is marked as read-only in its properties. Right-click on the file, select "Properties," and uncheck the "Read-only" box if it’s checked. If the file is opened in Excel, go to "File" > "Info" and check if there's an option to "Edit Workbook" or "Enable Editing." Additionally, ensure that the file is not being opened from a location that restricts editing, such as a read-only network drive or a shared file.
protect your file B by password. this will become a read only file