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| author | Peter Dintelmann <Peter.Dintelmann@Dresdner-Bank.com> | 2007-06-22 12:30:50 +0200 |
|---|---|---|
| committer | H.Merijn Brand <h.m.brand@xs4all.nl> | 2007-06-22 10:21:12 +0000 |
| commit | 1b9762da0ef5859330e74d4e715a45cb987232f7 (patch) | |
| tree | ca391eb1e75e576ce20ba2a1fef555eea0ee9ff5 /pod | |
| parent | 2e9cace9596b3862ebff48acafceb716ac529796 (diff) | |
| download | perl-1b9762da0ef5859330e74d4e715a45cb987232f7.tar.gz | |
perlopentut
From: "Dintelmann, Peter" <Peter.Dintelmann@Dresdner-Bank.com>
Message-ID: <3852726AFA94DE4F87E616F13F416A5FB66C78@naimucu1.ffz00k.rootdom.net>
p4raw-id: //depot/perl@31444
Diffstat (limited to 'pod')
| -rw-r--r-- | pod/perlopentut.pod | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/pod/perlopentut.pod b/pod/perlopentut.pod index f023434ed3..cd97fdce6a 100644 --- a/pod/perlopentut.pod +++ b/pod/perlopentut.pod @@ -195,7 +195,7 @@ whether it only works on existing files or always clobbers existing ones. open(SCREEN, "+> lkscreen") || die "can't open lkscreen: $!"; - open(LOGFILE, "+>> /var/log/applog" + open(LOGFILE, "+>> /var/log/applog") || die "can't open /var/log/applog: $!"; The first one won't create a new file, and the second one will always @@ -230,7 +230,7 @@ on each file in @ARGV. Thus a program called like this: $ myprogram file1 file2 file3 -Can have all its files opened and processed one at a time +can have all its files opened and processed one at a time using a construct no more complex than: while (<>) { @@ -487,7 +487,7 @@ If the filehandle or descriptor number is preceded not just with a simple "&" but rather with a "&=" combination, then Perl will not create a completely new descriptor opened to the same place using the dup(2) system call. Instead, it will just make something of an alias to the -existing one using the fdopen(3S) library call This is slightly more +existing one using the fdopen(3S) library call. This is slightly more parsimonious of systems resources, although this is less a concern these days. Here's an example of that: |