Giorgos Keramidas a écrit :
On 2007-04-07 17:31, Olivier Regnier <[EMAIL PROTECTED]> wrote:
Hello,
I have a problem with my perl script with the command sed. Here is a
example of my code:
Don't use system("sed ...") in Perl. It's considered poor style, since
Perl can do the same without having to fork a shell/sed process.
# Selecting the fast server
print "Using the server called $server";
system(`/usr/bin/sed 's|\*default host=\(.*\)|\*default host=${server}|'
$standard_supfile > $standard_supfile.copy`);
system('/bin/mv $standard_supfile.copy $standard_supfile');
Try using Perl only, instead of forking sed(1), like this:
,-----------------------------------------------------------------------
|
| #!/usr/bin/perl -Tw
|
| use strict;
|
| #
| # supfile_set_default_host($supfile, $newhost)
| # Set the default host used by the supfile $supfile to the
| # host name supplied as $newhost.
| #
|
| sub supfile_set_default_host($$);
| sub supfile_set_default_host($$)
| {
| my $tmpsupfile;
| my $supfile = shift;
| my $newhost = shift;
|
| if (!defined($supfile) || !defined($newhost)) {
| return undef;
| }
|
| $tmpsupfile = "tmp-" . $supfile;
| open(SUP, "$supfile") or die "$!";
| open(TMP, "> $tmpsupfile") or die "$!";
|
| my $line;
| while (defined($line = <SUP>)) {
| chomp $line;
| $line =~ s/^(\*[ \t]*default[ \t][ \t]*host[ \t]*=).*/$1${newhost}/;
| print TMP "$line\n";
| }
| close(TMP) or die "$!";
| close(SUP) or die "$!";
| rename("$tmpsupfile", "$supfile") or die "$!";
| return 1;
| }
|
| supfile_set_default_host('standard-supfile', 'cvsup.example.net');
|
`-----------------------------------------------------------------------
This is slightly more complex than forking a sed(1) utility run, but
it's easier to understand (at least it is for me).
A very brief run of the script seems to work here:
,-----------------------------------------------------------------------
|
| $ pwd
| /tmp
| $ cp /usr/share/examples/cvsup/standard-supfile .
| $ grep 'default host' standard-supfile
| *default host=CHANGE_THIS.FreeBSD.org
| $ perl -Tw supfile.pl
| $ grep 'default host' standard-supfile
| *default host=cvsup.keramida
| $
|
`-----------------------------------------------------------------------
- Giorgos
Hello and thanks for this perl script. I'm new in perl and when i test
him, i have an error that says:
No such file or directory at myscript.pl line 18
line 18 = open(TMP, "> $tmpsupfile") or die "$!";
#!/usr/bin/perl -Tw
use strict;
#
# supfile_set_default_host($supfile, $newhost)
# Set the default host used by the supfile $supfile to the
# host name supplied as $newhost.
#
sub supfile_set_default_host($$);
sub supfile_set_default_host($$)
{
my $tmpsupfile;
my $supfile = "/etc/standard-supfile";
my $newhost = "cvsup.fr.freebsd.org";
if (!defined($supfile) || !defined($newhost)) {
return undef;
}
$tmpsupfile = "tmp-" . $supfile;
open(SUP, "$supfile") or die "$!";
open(TMP, "> $tmpsupfile") or die "$!";
my $line;
while (defined($line = <SUP>)) {
chomp $line;
$line =~ s/^(\*[ \t]*default[ \t][ \t]*host[ \t]*=).*/$1${newhost}/;
print TMP "$line\n";
}
close(TMP) or die "$!";
close(SUP) or die "$!";
rename("$tmpsupfile", "$supfile") or die "$!";
return 1;
}
supfile_set_default_host('standard-supfile', 'cvsup.example.net');
Thanks again for your help.
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