posix

问题 Context: I am trying to get the names of fonts installed on my Linux machine. The name is between two colons. When I run this script using zsh, it works. When I switch to sh it breaks. It probably deletes \n characters, because the output is all one line. cmd="$(fc-list)" names="$(echo $cmd | grep -oP "(?<=: ).*?(?=:)")" echo $names Which command causes the issues? Is it not POSIX compliant? 回答1: Why does sh interpret these commands differently to zsh? Because they are different shell the

问题 Context: I am trying to get the names of fonts installed on my Linux machine. The name is between two colons. When I run this script using zsh, it works. When I switch to sh it breaks. It probably deletes \n characters, because the output is all one line. cmd="$(fc-list)" names="$(echo $cmd | grep -oP "(?<=: ).*?(?=:)")" echo $names Which command causes the issues? Is it not POSIX compliant? 回答1: Why does sh interpret these commands differently to zsh? Because they are different shell the

问题 The scenario I have a file server that acts as a master storage for the files to sync and I have several clients that have a local copy of the master storage. Each client may alter files from the master storage, add new ones or delete existing ones. I would like all of them to stay in sync as good as possible by regularly performing a sync operation, yet the only tool I have available everywhere for that is rsync and I can only run script code on the clients, not on the server. The problem

来源： https://stackoverflow.com/questions/64123085/does-variable-store-the-command-or-the-result-of-the-command-in-posix-sh

来源： https://stackoverflow.com/questions/33392337/list-of-synchronous-and-asynchronous-linux-posix-signals

来源： https://stackoverflow.com/questions/33392337/list-of-synchronous-and-asynchronous-linux-posix-signals

来源： https://stackoverflow.com/questions/9605131/why-do-system-calls-return-efault-instead-of-sending-a-segfault

来源： https://stackoverflow.com/questions/9605131/why-do-system-calls-return-efault-instead-of-sending-a-segfault

来源： https://stackoverflow.com/questions/9605131/why-do-system-calls-return-efault-instead-of-sending-a-segfault

来源： https://stackoverflow.com/questions/50623946/is-a-write-operation-in-unix-atomic