errno

Can't create table (errno: 150) on FOREIGN KEY

由 删除回忆录丶 提交于 2019-12-02 17:40:36
问题 I saw a lot of same question but I couldn't solve my case. If I run this code: <?php include_once($_SERVER['DOCUMENT_ROOT'].'/config.php'); $servername = HOST; $username = USERNAME; $password = PASSWORD; $dbname = DB; // Create connection $conn = new mysqli($servername, $username, $password, $dbname); // Check connection if ($conn->connect_error) { die("Connection failed: " . $conn->connect_error); } // sql to create table $sql = "CREATE TABLE IF NOT EXISTS Articls ( id INT(10) UNSIGNED AUTO

c++ system() raises ENOMEM

由 谁说胖子不能爱 提交于 2019-12-02 10:30:15
This question is a M(not)WE of this question . I wrote a code that reproduces the error: #include <cstdlib> #include <iostream> #include <vector> int *watch_errno = __errno_location(); int main(){ std::vector<double> a(7e8,1); // allocate a big chunk of memory std::cout<<system(NULL)<<std::endl; } It has to be compiled with g++ -ggdb -std=c++11 (g++ 4.9 on a Debian). Note that the int *watch_errno is useful only to allow gdb to watch errno . When it is run under gdb , I get this : (gdb) watch *watch_errno Hardware watchpoint 1: *watch_errno (gdb) r Starting program: /tmp/bug Hardware

go err

由 ε祈祈猫儿з 提交于 2019-12-02 07:42:52
golang自定义err方案很多 // Errno 代表某种错误的类型 type Errno int func (e Errno) Error() string { return "errno " + strconv.Itoa(int(e)) } func main(){ // 示例3。 const ( ERR0 = Errno(0) ERR1 = Errno(1) ERR2 = Errno(2) ) var myErr error = Errno(0) switch myErr { case ERR0: fmt.Println("ERR0") case ERR1: fmt.Println("ERR1") case ERR2: fmt.Println("ERR2") } } 来源： https://www.cnblogs.com/jackey2015/p/11736015.html

C 错误处理

由 感情迁移 提交于 2019-12-02 06:48:34
参考链接： https://www.runoob.com/cprogramming/c-error-handling.html 遇到错误，大多数C或者UNIX会返回1或者NULL，同时会设置一个errno，这个errno是全局变量 所以你可以通过检查返回值是否代表错误 C语言提供了perror()、和strerror()来显示与errno相关的信息 引入头文件 #include <errno.h> #include <string.h> perror（"自定义的提示信息"） 显示你传给它的字符串，后面跟一个冒号，然后跟上errno值对应的文本表示形式（即出错信息） strerror（number） 返回一个指针，指针指向errno为number时所对应的文本提示信息 extern int errno; ... fb=fopen("no_exist_filename","rb"); if(fb==1){ fprintf(stderr,"错误号：%d\n",errno); perror("通过 perror 输出错误"); fprintf(stderr,"打开文件错误:%s",strerror(errno)); } #输出 错误号: 2 通过 perror 输出错误: No such file or directory 打开文件错误: No such file or directory

Python urlopen connection aborted - urlopen error [Errno 10053]

由 六月ゝ 毕业季﹏ 提交于 2019-12-01 16:30:15
问题 I have some code that uses mechanize and beautifulsoup for web scraping some data. The code works fine on a test machine but the production machine is blocking the connection. The error i get is: urlopen error [Errno 10053] An established connection was aborted by the software in your host machine I have read through similar posts and I cannot find this exact error. The site I am trying to scrape is HTTPS but I have also had the same error occur with an HTTP site. I am using python 2.6 and

Does stdio always set errno?

由 六月ゝ 毕业季﹏ 提交于 2019-12-01 15:32:41
When a stdio stream encounters an error (but not EOF), the stream's error indicator will be set so that ferror() will return nonzero. I have always assumed that more information is available in errno . But how do I know this? Documentation for some functions [e.g. man fopen under Linux] says that errno will also be set. However man fgets doesn't mention errno at all. The glibc info pages are reassuring: In addition to setting the error indicator associated with the stream, the functions that operate on streams also set `errno' in the same way as the corresponding low-level functions that

Does stdio always set errno?

由 我是研究僧i 提交于 2019-12-01 14:36:45
问题 When a stdio stream encounters an error (but not EOF), the stream's error indicator will be set so that ferror() will return nonzero. I have always assumed that more information is available in errno . But how do I know this? Documentation for some functions [e.g. man fopen under Linux] says that errno will also be set. However man fgets doesn't mention errno at all. The glibc info pages are reassuring: In addition to setting the error indicator associated with the stream, the functions that

Errno = 13 and how to debug this more efficiently?

由 徘徊边缘 提交于 2019-12-01 14:29:58
I'm making an application and when i go from menu to an other activity that display image using the e3roid framework, i allways get this (logcat): D/PhoneWindow( 1562): DebugMonitor class=com.recisio.kfandroid.gui.tab.KFFeaturedTab focus=false E/copybit ( 1562): Error opening frame buffer errno=13 (Permission denied) D/PhoneWindow( 1562): DebugMonitor class=com.recisio.kfandroid.gui.player.KFPlayer focus=true I'm questionning myself about where does the error come? Is there a way to know exactly where it happens? May i have to ignore this? Apparently, copybit is just an abstraction for a basic

Errno = 13 and how to debug this more efficiently?

由 风格不统一 提交于 2019-12-01 12:47:19
问题 I'm making an application and when i go from menu to an other activity that display image using the e3roid framework, i allways get this (logcat): D/PhoneWindow( 1562): DebugMonitor class=com.recisio.kfandroid.gui.tab.KFFeaturedTab focus=false E/copybit ( 1562): Error opening frame buffer errno=13 (Permission denied) D/PhoneWindow( 1562): DebugMonitor class=com.recisio.kfandroid.gui.player.KFPlayer focus=true I'm questionning myself about where does the error come? Is there a way to know

python requests [Errno 104] Connection reset by peer

由 蹲街弑〆低调 提交于 2019-12-01 09:48:39
有个需求，数据库有个表有将近 几千条 url 记录，每条记录都是一个图片，我需要请求他们拿到每个图片存到本地。一开始我是这么写的(伪代码): import requests for url in urls: try: r = requests. get(url).content save_image(r) except Exception, e: print str(e) 然而在服务器上运行时, 会发现每隔一些请求会报类似下面的错误: HTTPConnectionPool(host='wx.qlogo.cn', port=80): Max retries exceeded with url: /mmopen/aTVWntpJLCAr2pichIUx8XMevb3SEbktTuLkxJLHWVTwGfkprKZ7rkEYDrKRr5icyDGIvU4iasoyRrqsffbe3UUQXT5EfMEbYKg/0 (Caused by <class 'socket.error'>: [Errno 104] Connection reset by peer) 原因，大概是因为我频繁请求，服务器关闭了部门请求连接 import requests for url in urls: for i in range( 10): try: r = requests. get(url).content
订阅 errno