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How do I make python wait for a pressed key?
...a signal gets
handled.
"""
import termios, fcntl, sys, os
fd = sys.stdin.fileno()
# save old state
flags_save = fcntl.fcntl(fd, fcntl.F_GETFL)
attrs_save = termios.tcgetattr(fd)
# make raw - the way to do this comes from the termios(3) man page.
attrs = list(attr...
Writing outputs to log file and console
... stdout and stderr output into the log file, but would also leave you with fd 3 connected to the console, so you can do
echo "Some console message" 1>&3
to write a message just to the console, or
echo "Some console and log file message" | tee /dev/fd/3
to write a message to both the con...
Open and write data to text file using Bash?
... same time should also be mentioned.
#!/bin/bash
# Open file descriptor (fd) 3 for read/write on a text file.
exec 3<> poem.txt
# Let's print some text to fd 3
echo "Roses are red" >&3
echo "Violets are blue" >&3
echo "Poems are cute" >&3
echo "And s...
What are file descriptors, explained in simple terms?
...it may not be same. When you open file, the operating system will assign a FD that is available and when you close it then OS release the FD and may assign that FD to another file opened after that. Its Operating system's way to track Opened Files and it has nothing to do with a specific file.
...
How to send a simple string between two programs using pipes?
...nclude <sys/types.h>
#include <unistd.h>
int main()
{
int fd;
char * myfifo = "/tmp/myfifo";
/* create the FIFO (named pipe) */
mkfifo(myfifo, 0666);
/* write "Hi" to the FIFO */
fd = open(myfifo, O_WRONLY);
write(fd, "Hi", sizeof("Hi"));
close(fd);
...
How can bcrypt have built-in salts?
...
OK, so I sign up for a site and choose a the password "foo". Bcrypt adds a random salt of "akd2!*", resulting in "fooakd2!*", which is hashed and stored. Later, I try to sign in with password "bar". To see if I'm correct, it needs to hash "barakd2!*". If the salt was generated ra...
How can I get a file's size in C? [duplicate]
...
length = lseek(fd, 0, SEEK_END)+1;
– Volodymyr M. Lisivka
Nov 16 '12 at 16:24
25
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Git commits are duplicated in the same branch after doing a rebase
...er understand what happened—here is an example:
You have a repository:
2a2e220 (HEAD, master) C5
ab1bda4 C4
3cb46a9 C3
85f59ab C2
4516164 C1
0e783a3 C0
You then proceed to change commits.
git rebase --interactive HEAD~3 # Three commits before where HEAD is pointing
(This is where you'll h...
Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies. Manifest definition do
...;
<assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
</dependentAssembly>
If you want to ensure all your Newtonsoft.Json packages are the same version, you...
Hidden Features of VB.NET?
...bject initialization is in there too!
Dim x as New MyClass With {.Prop1 = foo, .Prop2 = bar}
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answered Sep 19 '08 at 14:17
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