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How to check if there exists a process with a given pid in Python?
...mport os
def check_pid(pid):
""" Check For the existence of a unix pid. """
try:
os.kill(pid, 0)
except OSError:
return False
else:
return True
share
|
...
What are the differences between .so and .dylib on osx?
...but it's never been clear to me when I can't / shouldn't use a traditional unix .so shared object.
4 Answers
...
How to iterate over arguments in a Bash script
...t make it particularly easy to handle such
stuff, so (funnily enough) many Unix programs do not do a good job of
handling them.
On Unix, a filename (single component) can contain any characters except
slash and NUL '\0'.
However, the shells strongly encourage no spaces or newlines or tabs
anywhere i...
Getting error: Peer authentication failed for user “postgres”, when trying to get pgsql working with
...r with md5
So this will be changed to:
Database administrative login by Unix domain socket
local all postgres peer
# TYPE DATABASE USER ADDRESS METHOD
# "local" is for Unix domain socket connections only
local ...
Get epoch for a specific date using Javascript
How do I convert 07/26/2010 to a UNIX timestamp using Javascript?
7 Answers
7
...
What is thread safe or non-thread safe in PHP?
... in a multi-threaded environment if you have the choice!
Speaking only of Unix-based environments, I'd say that fortunately, you only have to think of this if you are going to use PHP with Apache web server, in which case you are advised to go with the prefork MPM of Apache (which doesn't use threa...
Should I use the datetime or timestamp data type in MySQL?
...se a datetime field.
If you meant that you want to decide between using a UNIX timestamp or a native MySQL datetime field, go with the native format. You can do calculations within MySQL that way
("SELECT DATE_ADD(my_datetime, INTERVAL 1 DAY)") and it is simple to change the format of the value to...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...ref_b的实际类型，这样怎么也骗不过去了。
在应用多态编程时，当我们无法确定传过来的对象的实际类型时使用dynamic_cast，如果能保证对象的实际类型，用static_cast就可以了。至于reinterpret_cast，我很喜欢，很象c语言那样的暴力...
How to find the operating system version using JavaScript?
...|Mac_PowerPC|Macintosh)/},
{s:'QNX', r:/QNX/},
{s:'UNIX', r:/UNIX/},
{s:'BeOS', r:/BeOS/},
{s:'OS/2', r:/OS\/2/},
{s:'Search Bot', r:/(nuhk|Googlebot|Yammybot|Openbot|Slurp|MSNBot|Ask Jeeves\/Teoma|ia_archiver)/}
];
for (var...
postgresql port confusion 5433 or 5432?
...ault ports, but the Pg that shipped with Mac OS X has a different default unix socket path, so even if the server is running on the same port it won't be listening to the same unix socket.
Most Mac users work around this by just using tcp/ip with psql -h localhost. You can also specify a port if r...