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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)
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
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