大约有 482 项符合查询结果（耗时：0.0133秒） [XML]
Pythonic way to check if a file exists? [duplicate]
...(untested):
import os
def open_if_not_exists(filename):
try:
fd = os.open(filename, os.O_CREAT | os.O_EXCL | os.O_WRONLY)
except OSError, e:
if e.errno == 17:
print e
return None
else:
raise
else:
return os.fdopen(fd, ...
How can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
...pen() . I need to get a file descriptor from it, to make calls like fsync(fd) on it. What's the function to get a file descriptor from a file pointer?
...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...= ObMySQLCallback::on_disconnect;
// 登录逻辑，在libeasy发现listenfd上有读事件时，会将连接接下来，然后给MySQL客户端发送握手包，同时接受客户端发送过来的用户名密码等信息，最后进行服务器端的验证，这几次
//交互过程是不经过l...
How can you diff two pipelines in Bash?
...rly remind you which input was which, by showing
-- /dev/stdin vs. ++ /dev/fd/63 or something, instead of two numbered fds.
Not even a named pipe will appear in the filesystem, at least on OSes where bash can implement process substitution by using filenames like /dev/fd/63 to get a filename that...
Creating a daemon in Linux
...rocess. On Linux, this is best implemented by iterating through /proc/self/fd, with a fallback of iterating from file descriptor 3 to the value returned by getrlimit() for RLIMIT_NOFILE.
Reset all signal handlers to their default. This is best done by iterating through the available signals up to ...
Multiple constructors in python? [duplicate]
...le, but I hope you get the idea:
class C(object):
def __init__(self, fd):
# Assume fd is a file-like object.
self.fd = fd
@classmethod
def fromfilename(cls, name):
return cls(open(name, 'rb'))
# Now you can do:
c = C(fd)
# or:
c = C.fromfilename('a filename')
...
Have nginx access_log and error_log log to STDOUT and STDERR of master process
... access_log /dev/stdout;
...
}
edit: May need to run ln -sf /proc/self/fd /dev/ if using running certain docker containers, then use /dev/fd/1 or /dev/fd/2
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improve this answer
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Redirect stderr and stdout in Bash
...
# Close STDOUT file descriptor
exec 1<&-
# Close STDERR FD
exec 2<&-
# Open STDOUT as $LOG_FILE file for read and write.
exec 1<>$LOG_FILE
# Redirect STDERR to STDOUT
exec 2>&1
echo "This line will appear in $LOG_FILE, not 'on screen'"
Now, simple echo wil...
Changing iframe src with Javascript
...lection" type="radio" onclick="go('http://calendar.zoho.com/embed/9a6054c98fd2ad4047021cff76fee38773c34a35234fa42d426b9510864356a68cabcad57cbbb1a0?title=Kevin_Calendar&type=1&l=en&tz=America/Los_Angeles&sh=[0,0]&v=1')"/><label for="day">Day</label>
I would also r...
Writing files in Node.js
...
Currently there are three ways to write a file:
fs.write(fd, buffer, offset, length, position, callback)
You need to wait for the callback to ensure that the buffer is written to disk. It's not buffered.
fs.writeFile(filename, data, [encoding], callback)
All data must be stored a...