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通过API获取IP信息、IP归属地 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...service/getIpInfo.php?ip=8.8.8.8
{"code":0,"data":{"country":"\u7f8e\u56fd","country_id":"US","area":"","area_id":"","region":"","region_id":"","city":"","city_id":"","county":"","county_id":"","isp":"","isp_id":"","ip":"8.8.8.8"}}
注意：返回的json中有嵌套，解析时先解析出data...
[解决]CTRL: PTY read or GRE write failed - 更多技术 - 清泛网 - 专注C/C++及内核技术
...查看系统日志[cat var log messages |grep pptpd]后发现）GRE: read(fd=6,buffer=80504c0...pptp vpn服务器连接失败出现以下日志内容：
（查看系统日志[ cat /var/log/messages |grep pptpd ]后发现）
GRE: read(fd=6,buffer=80504c0,len=8196) from PTY failed: status = -1 er...
Google breakpad stackwalker无法加载符号 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...head -n1 tmp/c++11.sym
#todo:
mkdir -p ./symbols/c++11/6EDC6ACDB282125843FD59DA9C81BD830
mv tmp/c++11.sym ./symbols/c++11/6EDC6ACDB282125843FD59DA9C81BD830
rm -rf tmp
路径有要求，GUID来自 .so 文件的头部。
为了方便，写个 python 脚本 gen_symbols.py 自动生成：
#...
Win10正式版官方原版ISO镜像下载大全（64位&32位） - 软件下载 - 清泛网 - ...
...k://|file|cn_windows_10_multiple_editions_x64_dvd_6848463.iso|4303300608|94FD861E82458005A9CA8E617379856A|/
【32位简体中文家庭/专业版】
文件名：cn_windows_10_multiple_editions_x86_dvd_6846431.iso
体积：3.01GB
SHA1：21B824F402927E76C65160B62EB8A4EBBA...
/proc 内核统计信息各文件的含义 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...的统计文件，如下： ls -F proc 904 attr coredump_filter fdinfo make-it-fail mountstats oom_score_adj sched stat 1、各进程的统计文件，如下：
# ls -F /proc/904/
attr/ coredump_filter fdinfo/ make-it-fail mountstats oom_score_adj sched st...
What's the best way to check if a file exists in C?
...itions, then use this:
#include <fcntl.h>
#include <errno.h>
fd = open(pathname, O_CREAT | O_WRONLY | O_EXCL, S_IRUSR | S_IWUSR);
if (fd < 0) {
/* failure */
if (errno == EEXIST) {
/* the file already existed */
...
}
} else {
/* now you can use the file */
}
...
How to avoid reinstalling packages when building Docker image for Python projects?
...ild:
Step 1 : WORKDIR /srv
---> Running in 22d725d22e10
---> 55768a00fd94
Removing intermediate container 22d725d22e10
Step 2 : ADD ./requirements.txt /srv/requirements.txt
---> 968a7c3a4483
Removing intermediate container 5f4e01f290fd
Step 3 : RUN pip install -r requirements.txt
---> Ru...
Do sealed classes really offer performance Benefits?
... ecx,183994h (MT: ScratchConsoleApplicationFX4.NormalClass)
003c00b8 e8631fdbff call 00172020 (JitHelp: CORINFO_HELP_NEWSFAST)
003c00bd e80e70106f call mscorlib_ni+0x2570d0 (6f4c70d0) (System.Console.get_Out(), mdToken: 060008fd)
003c00c2 8bc8 mov ecx,eax
003c00c4 8b1...
How do I edit an incorrect commit message in git ( that I've pushed )?
...
Suppose you have a tree like this:
dd2e86 - 946992 - 9143a9 - a6fd86 - 5a6057 [master]
First, checkout a temp branch:
git checkout -b temp
On temp branch, reset --hard to a commit that you want to change its message (for example, that commit is 946992):
git reset --hard 946992
Use...
Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
...
下面是管道的创建函数：
#include <unistd.h>
int pipe(int fd[2])
函数参数为一个长度为2的整型数组，fd[0]表示管道的读端，fd[1]表示管道的写端，如果读写端顺序颠倒，将导致错误发生。另外管道的读写及关闭操作均利用一般文件I...