大约有 482 项符合查询结果（耗时：0.0140秒） [XML]
Redirect stdout to a file in Python?
...tors level e.g.:
import os
from contextlib import redirect_stdout
stdout_fd = sys.stdout.fileno()
with open('output.txt', 'w') as f, redirect_stdout(f):
print('redirected to a file')
os.write(stdout_fd, b'not redirected')
os.system('echo this also is not redirected')
b'not redirected...
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...
How do I execute a command and get the output of the command within C++ using POSIX?
... with a POSIX compatibility layer...)
enum PIPE_FILE_DESCRIPTERS
{
READ_FD = 0,
WRITE_FD = 1
};
enum CONSTANTS
{
BUFFER_SIZE = 100
};
int
main()
{
int parentToChild[2];
int childToParent[2];
pid_t pid;
string dataReadFromChild;
char buffer[BUFFER_SIZE + 1]...
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 to inspect FormData?
...rmData:
var myFormData = {
key1: 300,
key2: 'hello world'
};
var fd = new FormData();
for (var key in myFormData) {
console.log(key, myFormData[key]);
fd.append(key, myFormData[key]);
}
If you want to debug a plain FormData object, you could also send it in order to examine it in...
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
...
AngularJS: how to implement a simple file upload with multipart form?
... from the user.
controller
$scope.uploadFile = function(files) {
var fd = new FormData();
//Take the first selected file
fd.append("file", files[0]);
$http.post(uploadUrl, fd, {
withCredentials: true,
headers: {'Content-Type': undefined },
transformRequest:...