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Top Forums Shell Programming and Scripting How to launch results of a pipe? Post 302628965 by scampsd on Tuesday 24th of April 2012 07:54:58 AM
Old 04-24-2012
Question How to launch results of a pipe?

Good afternoon,
I have just messed up and deleted some directories on my UNIX machine.
I would now want to know which packages are impacted by this. Therefore I have a look in the file "/var/sadm/install/contents" (which contains the filenames/directory names for each installation package). After this, I add "ls " in front and "1>/dev/null" at the back, so I get following result:

Code:
$grep "<Package>" /var/sadm/install/contents | awk {'print "ls " $1 " 1>/dev/null"'}
...
ls /usr/3rdpty/ant/lib/ant.jar 1>/dev/null
ls /usr/3rdpty/ant/lib/xercesImpl.jar 1>/dev/null
ls /usr/3rdpty/ant/lib/xml-apis.jar 1>/dev/null
Now I would like to launch those "ls" commands. The idea is the following:
$ls <existing file> 1>/dev/null
$ls <non-existing file> 1>/dev/null
<non-existing file>: No such file or directory

=> I intend only to see which files/directories have been erased that belong to the package. When there are none, nothing needs to be done. When there are some, the package needs to be re-installed.

In order to do this, I need to launch the "ls ..." output.
I have already tried using a "| eval" behind it, but this does not work.
Does anybody have an idea?

Thanks
Dominique

Last edited by Scott; 04-24-2012 at 09:19 AM.. Reason: Code tags
 

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contents(4)							   File Formats 						       contents(4)

NAME
contents - list of files and associated packages SYNOPSIS
/var/sadm/install/contents DESCRIPTION
The file /var/sadm/install/contents is a source of information about the packages installed on the system. This file must never be edited directly. Always use the package and patch commands (see SEE ALSO) to make changes to the contents file. Each entry in the contents file is a single line. Fields in each entry are separated by a single space character. Two major styles of entries exist, old style and new style. The following is the format of an old-style entry: ftype class path package(s) The following is the general format of a new-style entry: path[=rpath] ftype class [ftype-optional-fields] package(s) New-style entries differ for each ftype. The ftype designates the entry type, as specified in pkgmap(4). The format for new-style entries, for each ftype, is as follows: ftype s: path=rpath s class package ftype l: path l class package ftype d: path d class mode owner group package(s) ftype b: path b class major minor mode owner group package ftype c: path c class major minor mode owner group package ftype f: path f class mode owner group size cksum modtime package ftype x: path x class mode owner group package ftype v: path v class mode owner group size cksum modtime package ftype e: path e class mode owner group size cksum modtime package A significant distinction between old- and new-style entries is that the former do not begin with a slash (/) character, while the latter (new-style) always do. For example, the following are new-style entries: d none /dev SUNWcsd e passwd /etc/passwd SUNWcsr The following are new-style entries: /dev d none 0755 root sys SUNWcsr SUNWcsd /etc/passwd e passwd 0644 root sys 580 48299 1077177419 SUNWcsr The following are the descriptions of the fields in both old- and new-style entries. path The absolute path of the node being described. For ftype s (indicating a symbolic link) this is the indirect pointer (link) name. rpath The relative path to the real file or linked-to directory name. ftype A one-character field that indicates the entry type (see pkgmap(4)). class The installation class to which the file belongs (see pkgmap(4)). package The package associated with this entry. For ftype d (directory) more than one package can be present. mode The octal mode of the file (see pkgmap(4)). owner The owner of the file (see pkgmap(4)). group The group to which the file belongs (see pkgmap(4)). major The major device number (see pkgmap(4)). minor The minor device number (see pkgmap(4)). size The actual size of the file in bytes as reported by sum (see pkgmap(4)). cksum The checksum of the file contents (see pkgmap(4)). modtime The time of last modification (see pkgmap(4)). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsr | +-----------------------------+-----------------------------+ |Interface Stability |Unstable | +-----------------------------+-----------------------------+ SEE ALSO
patchadd(1M), pkgadd(1M), pkgadm(1M), pkgchk(1M), pkgmap(4), attributes(5) NOTES
As shown above, the interface stability of /var/sadm/install/contents is Unstable (see attributes(5)). It is common practice to use this file in a read-only manner to determine which files belong to which packages installed on a system. While this file has been present for many releases of the Solaris operating system, it might not be present in future releases. The fully supported way to obtain information from the installed package database is through pkgchk(1M). It is highly recommended that you use pkgchk rather than relying on the contents file. SunOS 5.10 29 Jun 2004 contents(4)
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