How to copy a Read-Only file and make the copy writable with a single cp command?
You should look at the install command.
From man install
SYNOPSIS
install [OPTION]... [-T] SOURCE DEST
install [OPTION]... SOURCE... DIRECTORY
install [OPTION]... -t DIRECTORY SOURCE...
install [OPTION]... -d DIRECTORY...
DESCRIPTION
This install program copies files (often just compiled) into
destination locations you choose. If you want to download and install
a ready-to-use package on a GNU/Linux system, you should instead be
using a package manager like yum(1) or apt-get(1).
In the first three forms, copy SOURCE to DEST or multiple SOURCE(s) to
the existing DIRECTORY, while setting permission modes and owner/group.
In the 4th form, create all components of the given DIRECTORY(ies).
...
-m, --mode=MODE
set permission mode (as in chmod), instead of rwxr-xr-x
user389238
Updated on September 17, 2022Comments
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user389238 almost 2 years
How to copy a Read-Only file in Linux and make the copy writable with a single cp command in Linux (Ubuntu 10.04)?
The --no-preserve and --preserve seemed to be good candidates, except that they should "and" the mode flags, while what I am looking for is something that will "or" them (add +w mode).
More details:
I have to import a repository from GIT to Perforce. I want that all Perforce depot files are Read-Only (that is how Perforce was designed), while all other files that were derived/copied from depot files are writable. Currently if a Makefile tries to copy a Read-Only file then the derived file will also be Read-only. This leads to build-errors when cp tries to overwrite Read-Only file second time. Of course the --force is a workaround here but then the derived file is also Read-Only. Also I do not want to mess with "chmod" after each "cp" command - I will do that only as the last resort.
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user389238 over 13 yearsIt seems that "install" can do what I need. I also found out that "rsync" with "--chmod" is even more superior.
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linuxgnuru almost 8 yearsor just use umask?