Re^2: mysterious error of read function in solaris

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Re^3: mysterious error of read function in solaris by JavaFan (Canon) on Jan 19, 2012 at 15:46 UTC
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;` [download] I guess since 5.10, you could also write: `while (read(...) // die "read failed: $!") { ... do stuff here ... }` [download] but I don't think I would want to recommend that.	[reply] [d/l] [select]

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read

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).

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

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