What does `exec $@` do? - Unix Linux Stack Exchange The exec will replace the current process with the process resulting from executing its argument In short, exec "$@" 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)
c - Differences between fork and exec - Stack Overflow 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
command line - What does exec do? - Ask Ubuntu The exec you have executed is a shell built-in : $ type -a exec exec is a shell builtin Now from help exec : Replace the shell with the given command Execute COMMAND, replacing this shell with the specified program ARGUMENTS become the arguments to COMMAND If COMMAND is not specified, any redirections take effect in the current shell
What are the different versions of exec used for in C and C++? The differences are combinations of: L vs V: whether you want to pass the parameters to the exec'ed program as L: individual parameters in the call (variable argument list): execl(), execle(), execlp(), and execlpe() V: as an array of char* execv(), execve(), execvp(), and execvpe() The array format is useful when the number of parameters that are to be sent to the exec'ed process are variable
What does set -e and exec $@ do for docker entrypoint scripts? 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
Difference between exec, execvp, execl, execv? I am writing a code that represent a new shell to Linux One of the commands I want to support is running a process for example if I get the following line command [arguments] Then I want to run