I'm on perl, version 5.005_03 built for i386-freebsd...the code is as follows:
open(FH,"+<./file.dat") || die("Can't open ./file.dat for reading/writ
+ing: $!");
flock(FH,LOCK_EX);
seek(FH,0,0);
@dat = <FH>;
foreach (@dat) {chomp}
# this is where I process @dat, and when I feed text
# manually into it, it works. the problem doesn't
# lie in this segment of the code
seek(FH,0,0);
print FH join("\n",@dat);
flock(FH,LOCK_UN);
close(FH);
Now, i can open the file for reading, and i can open it for writing, and both work fine. But when I try reading AND writing, it doesnt spring an error, it simply doesnt read anything from or write anything to the file. Should I try
+>instead of
+<or what?
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.