Re^2: mysterious error of read function in solaris

[david2008]

Which variable should i check if read fails?

[JavaFan]

Whatever variable you put the return value of read in. From perldoc -f read

Returns the number of characters actually read, 0 at end of file, or undef if there was an error (in the latter case $! is also set).

So, you'd do something like:

my $r;
while ($r = read ...) {
    ... do stuff here ...
}
die "read failed: $!" unless defined $r;

I guess since 5.10, you could also write:

while (read(...) // die "read failed: $!") {
    ... do stuff here ...
}

but I don't think I would want to recommend that.