The 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).
Possible duplicate of What are the different versions of exec used for in C and C++?, What is the difference between the functions of the exec family of system calls like exec and execve?, What is the difference between execl and execv?, etc.
At the exec line entrypoint.sh, the shell running as pid 1 will replace itself with the command server start. This is critical for signal handling. Without using exec, the server start in the above example would run as another pid, and after it exits, you would return to your shell script. With a shell in pid 1, a SIGTERM will be ignored by ...
The use of fork and exec exemplifies the spirit of UNIX in that it provides a very simple way to start new tasks. Note the use of the word task here, I have deliberately avoided using the terms process or program, which you can define as: a process is an "engine of execution", something within the operating system which is capable of running a program; and a program is a specific piece of code ...
The only difference between the above system calls is with the parameters. Is that the case? If so, is the ultimate outcome of all the exec family system calls to execute a program (with different parameters)?
I've been looking at dynamic evaluation of Python code, and come across the eval() and compile() functions, and the exec statement. Can someone please explain the difference between eval and exec,...
These are all the versions of exec that can be used in C (and C++) execl execle execlp execv execve execvp What's the difference between them? How do you know which one to use?
