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Full Discussion: perl/sed -i removes link
Top Forums UNIX for Advanced & Expert Users perl/sed -i removes link Post 302637001 by bora99 on Tuesday 8th of May 2012 08:34:33 AM
Old 05-08-2012
perl/sed -i removes link

hello,

is it a behavior of
Quote:
perl -i
or
Quote:
sed -i
that "-i" removes unix link .

example :

i create a file "src_file" and link it to "link_file" and then i start "perl -i"

Quote:
echo "AAA" > src_file

ln -s src_file link_file

ll
lrwxr-x--- 1 user root 8 May 8 14:20 link_file -> src_file
-rw-r----- 1 user root 4 May 8 14:20 src_file

perl -i -pne 's/AAA/BBB/g' link_file

ll
-rw-r----- 1 user root 4 May 8 14:21 link_file
-rw-r----- 1 user root 4 May 8 14:20 src_file

cat link_file
BBB
the link is removed. does another option exists to change content of a file without temporary files ?

UNIX-Version: HP-UX and i also tested it with Linux

regards
 

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LINK(3) 								 1								   LINK(3)

link - Create a hard link

SYNOPSIS
bool link (string $target, string $link) DESCRIPTION
link(3) creates a hard link. PARAMETERS
o $target - Target of the link. o $link - The link name. RETURN VALUES
Returns TRUE on success or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | This function is now available on Windows plat- | | | forms (Vista, Server 2008 or greater). | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 Creating a simple hard link <?php $target = 'source.ext'; // This is the file that already exists $link = 'newfile.ext'; // This the filename that you want to link it to link($target, $link); ?> NOTES
Note This function will not work on remote files as the file to be examined must be accessible via the server's filesystem. Note For Windows only: This function requires PHP to run in an elevated mode or with the UAC disabled. SEE ALSO
symlink(3), readlink(3), linkinfo(3). PHP Documentation Group LINK(3)
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