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Bookmark or Share- bash - What does an "exec" command do? - Ask UbuntuIn this case exec is used. exec will replace the contents of the currently running process with the information from a program binary. After the forking process, the address space of the child process is overwritten with the new process data. This is done through an exec call to the system.
- Please explain the exec () function and its familywhat is the exec function and its family. The exec function family is all functions used to execute a file, such as execl, execlp, execle, execv, and execvp.They are all frontends for execve and provide different methods of calling it. why is this function used. Exec functions are used when you want to execute (launch) a file (program).
- What are the uses of the exec command in shell scripts?The exec built-in command mirrors functions in the kernel, there are a family of them based on execve, which is usually called from C. exec replaces the current program in the current process, without forking a new process. It is not something you would use in every script you write, but it comes in handy on occasion.
- What does `exec "$@"` do? - Unix & Linux Stack ExchangeThe exec will replace the current process with the process resulting from executing its argument. In short, exec "$@" will run the command given by the command line parameters in such a way that the current process is replaced by it (if the exec is able to execute the command at all).
- Should I use `app.exec ()` or `app.exec_ ()` in my PyQt application?app.exec_() or app.exec() alone is enough and it works normally. They fixed some things in PyQt5 under the hood so that you don't need that sys.exit() anymore. If you want your code to run on PyQt4, then have sys.exit() there. Also, app.exec_() and app.exec() are interchangable, so you can use whichever
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