Won't socket use the first available file descriptor?

sub dbconnect {
    socket(my $mysocket, PF_INET, SOCK_STREAM, getprotobyname('tcp'))
        or die("socket: $!");

    fileno($mysocket) >= 100
        or die("No available file descriptors below 100\n");

    # ...
}
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Update: Here's a test that checks if the above works:

use strict;
use warnings;

use Socket;

my @handles;
for (0..9) {
    open($handles[$_], '<', $0) or die;
    print("$_: ", fileno($handles[$_]), "\n");
}

print("--\n");

close($handles[5]);

socket(my $mysocket, PF_INET, SOCK_STREAM, getprotobyname('tcp')) or d
+ie;
print(fileno($mysocket), "\n");
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Works on my system:

0: 3
1: 4
2: 6
3: 8
4: 9
5: 10
6: 11
7: 12
8: 13
9: 14
--
10
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