symlink

来源： https://stackoverflow.com/questions/48167601/create-symbolic-link-in-bitbake-recipe

问题 I am running a Symfony3 application inside a Docker container. I have created a CommonBundle with all the resources (js, css, images). This resources are symlinked to another path as shown below: $ docker exec -u www-data -it dockeramp_php_1 ls -la oneview_symfony/src/CommonBundle/Resources/public total 8 drwxrwsr-x 2 www-data www-data 4096 Feb 23 21:09 . drwxr-sr-x 5 www-data www-data 4096 Feb 23 20:54 .. lrwxrwxrwx 1 root www-data 32 Feb 23 21:09 css -> /var/www/html/public_html/styles

问题 When we create a symlink, the number of bytes the symlink takes up is exactly the length of the origin it points to. For instance, $ ln -s dest link1 $ ln -s longer_dest link2 $ ls -l lrwxrwxrwx 1 username 4 Mar 26 20:21 link1 -> dest lrwxrwxrwx 1 username 11 Mar 26 20:21 link2 -> longer_dest where link1 takes up 4 bytes, which is the length of dest ; link2 takes up 11 bytes, which is the length of longer_dest . Therefore, symlinks are in fact no more than the destination path stored in plain

问题 My OS is linux. I program in C. I know I can use the lstat() to recognize the soft link, i.e., use S_ISLNK(st.st_mode). But how can I recognize the link is hard link? if the link is hard link, it will be thought of as regular file. However, I also want to distinguish the regular file from the hard link. Are there any ways to handle this case? 回答1: But how can I recognize the link is hard link? You can't. A "hard link" isn't actually anything special. It's just a directory entry that happens

问题 I've ran into an issue wherein Git believes that a file is beyond a symbolic link, and that, thus, it cannot be version controlled, but it appears to be a real file. [root@r1 h]# stat -f conf/core-site.xml File: "conf/core-site.xml" ID: 5c7eb82882a6e866 Namelen: 255 Type: ext2/ext3 Block size: 4096 Fundamental block size: 4096 Blocks: Total: 2735511 Free: 510158 Available: 371202 Inodes: Total: 694960 Free: 597972 Additionally, I've tried "readlink" to show the link pointer, but to no avail.

问题 I've ran into an issue wherein Git believes that a file is beyond a symbolic link, and that, thus, it cannot be version controlled, but it appears to be a real file. [root@r1 h]# stat -f conf/core-site.xml File: "conf/core-site.xml" ID: 5c7eb82882a6e866 Namelen: 255 Type: ext2/ext3 Block size: 4096 Fundamental block size: 4096 Blocks: Total: 2735511 Free: 510158 Available: 371202 Inodes: Total: 694960 Free: 597972 Additionally, I've tried "readlink" to show the link pointer, but to no avail.

问题 I'm using Laravel Homestead (Vagrant, Ubuntu). My host computer is Windows 10 running VirtualBox. As admin (since I've already seen tons of answers that say lack of permissions is usually why people have problems with symlinks), I open Git Bash and run this: vagrant@vboxHomestead:~/Code/myproject$ ls -lah /home/vagrant/foo/blah total 0 drwxrwxrwx 1 vagrant vagrant 0 Mar 17 23:09 . drwxrwxrwx 1 vagrant vagrant 0 Mar 17 22:36 .. -rwxrwxrwx 1 vagrant vagrant 0 Mar 17 23:09 asdf.txt vagrant

问题 I'm using Laravel Homestead (Vagrant, Ubuntu). My host computer is Windows 10 running VirtualBox. As admin (since I've already seen tons of answers that say lack of permissions is usually why people have problems with symlinks), I open Git Bash and run this: vagrant@vboxHomestead:~/Code/myproject$ ls -lah /home/vagrant/foo/blah total 0 drwxrwxrwx 1 vagrant vagrant 0 Mar 17 23:09 . drwxrwxrwx 1 vagrant vagrant 0 Mar 17 22:36 .. -rwxrwxrwx 1 vagrant vagrant 0 Mar 17 23:09 asdf.txt vagrant

问题 Are there any files or locations in the Android filesystem that cannot be found using File.listFiles() , starting at the root ( / ) and recursively entering and listing directories found by listFiles , while ignoring/skipping any SymLinks (Symbolic Links) . Or, to put it another way, can SymLinks point to somewhere in the Android filesystem that cannot be found in the standard file tree? I am aware there is an emulated file system as part of the overall filesystem, but I had understood that

问题 Given a symlink, I want to know to which directory this symlink is pointing. Does the Rust standard library offer something to find this out? I have only found unstable API functions so far. 回答1: It seems to me that you want fs::read_link: Reads a symbolic link, returning the file that the link points to. 回答2: You can use std::fs::canonicalize: Returns the canonical, absolute form of a path with all intermediate components normalized and symbolic links resolved. 来源： https://stackoverflow.com