fly over wrote:
(please don't top-post on this mailing list - it makes posts harder to follow)
From: Paul Howarth paul@city-fan.org Subject: Re: SUID/GUID files search ! To: For users of Fedora Core releases fedora-list@redhat.com
fly over wrote:
Hi guys, i'm trying to write a script for following purpose.
shell program will be used by Linux/Unix sysadmins to search for SUID/SGID files. The default directory to search is the present working directory, however, the user may include a directory name on the command line as an alternative. Also, if the user includes the argument '-R' then the search should include all subdirectories recursively. Also, the '-G' argument will include SGID files which by default are not shown. The output of the script should show the absolute pathname of the file and the owner.
Please help me in performin such task.
Sounds like a homework assignment to me...
i'm trying using this line:
ls -l | awk '{print $1}' | grep s it just prints the permissions having s bit.
Yes, that's right. Your awk command is just printing the first field of the ls -l output, which is the permissions. What you want to do is to search the permissions but output the filename, something more like this:
$ ls -l | awk '/^-..[Ss]/ { print $9 }'
This looks for regular files (1st character of line is "-") that have the SUID bit set (fourth character of line is "s" or "S") and then prints out the filename (9th field of line).
You probably want to be using the "find" command rather than the "ls" command though. Use "-maxdepth 1" by default to turn off its recursive checking of directories, and skip the "-maxdepth 1" option when your script is passed the -R option.
fly over wrote:
Thanks Paul for supporting, yes it is a sort of assignment but from my boss. as your script returning file name, Please tell me how can i get the absolute pathname of the file and the owner.
Try something like this:
DIR=`pwd` # starting directory RECURSE_OPTION="-maxdepth 1" # "" for recursive search PERM_BITS=04000 # 06000 for both SUID and SGID find $DIR $RECURSE_OPTION -perm +$PERM_BITS -type f -printf '%p %u\n'
Paul.