editing & viewing contents of files in /bin

dinakumar12 · 01-01-2011, 12:11 PM

Hi all,

i just want to know,how can we edit the files of /bin folder.

for ex: we have a file named mkdir which is being executed when we run the mkdir command at the terminal.

I just want to read the code inside that mkdir file. That binary file has to be converted to text,which should be human readable.

Please post your suggestions.

Thanks in advance,
Dinesh.

Nylex · 01-01-2011, 12:14 PM

Usually the man page for a given command gives you some info about the package it's in. For example, for mkdir, the package is coreutils. So, you can go to the web page for coreutils (google it) and obtain the source code.

Edit: there may be package manager specific ways of getting the information too, as well as just googling the executable name, obviously.

Also, I'm not sure what this has to do with servers, so I've reported it to be moved to a more suitable place.

dinakumar12 · 01-01-2011, 12:50 PM

Hi Nylex,

Thank you for your reply and its very much useful.
Sorry for posting this here.

Nylex · 01-01-2011, 12:58 PM

No problem. A mod should move your thread at some point

.

PTrenholme · 01-01-2011, 01:04 PM

If you really want to "find the text" in an elf file, use the strings command; it you want to see everything in a file, with strings readable, use the hexdump -C command. If you want to actually see the source code for the command, download it from the source repository for your distribution.

For your specific example, the generic source code would (probably - I haven't checked this) be in the GNU archive or the Linux kernel archives.

If, on the other hand, you just want to know how to use some command, the command invoked with a -h or --help option will often (but not always) suffice, the man command will usually show more information, and the info command (or pinfo if you've installed it) sometimes gives you even more info.

For example:

Code:

$ mkdir --help
Usage: mkdir [OPTION]... DIRECTORY...
Create the DIRECTORY(ies), if they do not already exist.

Mandatory arguments to long options are mandatory for short options too.
  -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask
  -p, --parents     no error if existing, make parent directories as needed
  -v, --verbose     print a message for each created directory
  -Z, --context=CTX  set the SELinux security context of each created
                      directory to CTX
      --help     display this help and exit
      --version  output version information and exit

Report mkdir bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info coreutils 'mkdir invocation'

salasi · 01-01-2011, 04:31 PM

Quote:

Originally Posted by dinakumar12

Hi all,

i just want to know,how can we edit the files of /bin folder.

for ex: we have a file named mkdir which is being executed when we run the mkdir command at the terminal.

I just want to read the code inside that mkdir file. That binary file has to be converted to text,which should be human readable.

Please post your suggestions.

Thanks in advance,
Dinesh.

Be careful what you wish for; you might just get it.

notes

'Human Readable' does not imply 'Human Comprehensible'
Even if you got 'Human Comprehensible', it wouldn't necessarily help you with your objectives, if they are to do something different from what is currently occuring

please understand PTrenholme's post (which is very helpful, considering your exact questions, but I suspect that you haven't actually asked for the things that will really help you achieve your aim, whatever that is), and the implications thereof, and tell us more about your actual problem

GrapefruiTgirl · 01-02-2011, 01:36 PM

Moved: This thread is more suitable in "Linux Software" and has been moved accordingly to help your thread/question get the exposure it deserves.