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How to make child process die after parent exits?
... deliver SIGHUP (or other signal) when parent dies by specifying option PR_SET_PDEATHSIG in prctl() syscall like this:
prctl(PR_SET_PDEATHSIG, SIGHUP);
See man 2 prctl for details.
Edit: This is Linux-only
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Git: which is the default configured remote for branch?
...is the "default configured remote for your current branch" ? And how do I set it?
4 Answers
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Set a DateTime database field to “Now”
In VB.net code, I create requests with SQL parameters. It I set a DateTime parameter to the value DateTime.Now, what will my request look like ?
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How to enable local network users to access my WAMP sites?
...dress on that subnet.
Of course you will need to check that your router is set to use the 192.168.0 range.
This is simply done by entering this command from a command window ipconfig and looking at the line labeled IPv4 Address. you then use the first 3 sections of the address you see in there.
For ...
Setting Django up to use MySQL
...utilizing MySQL option files, as of Django 1.7. You can accomplish this by setting your DATABASES array like so:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'OPTIONS': {
'read_default_file': '/path/to/my.cnf',
},
}
}
You also need t...
SQL query return data from multiple tables
...
+-------+-------------+------+-----+---------+----------------+
3 rows in set (0.01 sec)
mysql> insert into colors (color, paint) values ('Red', 'Metallic'),
-> ('Green', 'Gloss'), ('Blue', 'Metallic'),
-> ('White' 'Gloss'), ('Black' 'Gloss');
Query OK, 5 rows affected (0.00 sec...
could not resolve host github.com error while cloning remote repository in git
...
do i need to configure proxy settings? because my office has got proxy servers.
Yes, you can do so by setting HTTP_PROXY, and HTTPS_PROXY environment variables.
See "Syncing with github":
set HTTPS_PROXY=http://<login_internet>:<password_intern...
How to undo the effect of “set -e” which makes bash exit immediately if any command fails?
After entering set -e in an interactive bash shell, bash will exit immediately if any command exits with non-zero. How can I undo this effect?
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How can I see the specific value of the sql_mode?
...
It's only blank for you because you have not set the sql_mode. If you set it, then that query will show you the details:
mysql> SELECT @@sql_mode;
+------------+
| @@sql_mode |
+------------+
| |
+------------+
1 row in set (0.00 sec)
mysql> set sql_m...
What's the difference between MemoryCache.Add and MemoryCache.Set?
...Add does nothing (returns false) if there is already a value for that key. Set does an insert or update, as necessary.
Remove + Add would leave a gap in the middle when another thread querying that key would get no clue (Set does not; the swap is typically atomic); as such, while Set has the same e...