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by Lukasz Lew
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or by Lukasz Lew
Published on 2009-10-18T03:05:11Z
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2010/03/14
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There are so many possible errors in POSIX environement. Why some of them (write to unconnected socket in particular) get special treatment in form of signals?
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I'd like to know if there's a way to get the number of seconds since the UNIX epoch in any POSIX compliant shell, without resorting to non-POSIX languages like perl, or using non-POSIX extensions like GNU awk's strftime function.
Here are some solutions I've already ruled out...
date +%s //…
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Under Ubuntu 8.10, bash shell, the LANG and LC_ALL variables are not set:
user@machine1:~$ locale
LANG=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=
Where…
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posix does not appear when I run php -m cmd, however, I see it from the phpinfo() –enable-posix=shared on Linux with Plesk 9.
Basically, I can't use posix_*() functions as described at
http://www.php.net/manual/en/ref.posix.php
this shows doesn't exists:
if (function_exists(‘posix_getuid’)) {
echo…
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In a linux application I'm using pipes to pass information between threads.
The idea behind using pipes is that I can wait for multiple pipes at once using poll(2). That works well in practice, and my threads are sleeping most of the time and only wake up if there is something to do for them.
On…
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Hi
Do you know about any good library wrapping posix and linux functions and structures ( eg. sockets or file descriptors ) into C++ classes? For example I'm thinking about a base FileDescriptor class and some inheriting classes ( unix sockets etc ) with methods like write, read or even some syscalls…
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When writing SQL procedures, it is really important to handle errors cautiously. Having that in mind will probably save your efforts, time and money. I have been working with MS-SQL 2000 and MS-SQL 2005 (I have not got the opportunity to work with MS-SQL 2008 yet) for many years now and I want to…
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“The purpose of reviewing the Error Handling code is to assure that the application fails safely under all possible error conditions, expected and unexpected. No sensitive information is presented to the user when an error occurs.” (OWASP, 2011)
No Error Handling The absence of error…
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Are errors chasing away your visitors? Let Marc Plotz show you how to handle them effectively. ...
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Are errors chasing away your visitors? Let Marc Plotz show you how to handle them effectively. ...
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I'm working on a domain-specific language (DSL) for non-programmers. Non-programmers make a lot of grammar mistakes: they misspell keywords, they don't close parentheses, they don't terminate blocks, etc.
I'm using ANTLR to generate my parser; it provides a nifty mechanism for handling RecognitionExceptions…
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