Sep 5, 2018 · exec is to run a command in the same process as the shell. That's the last command a script will execute because after that, the process will be running another command than the shell. So if your script is #! /bin/sh - exec "$@" And you call your script using a shell command line like: /path/to/your-script 'echo' "some test" 'x y'

Apr 10, 2015 · -exec command {} + This variant of the -exec action runs the specified command on the selected files, but the command line is built by appending each selected file name at the end; the total number of invocations of the command will be much less than the number of matched files. The command line is built in much the same way that xargs builds ...

Jun 6, 2018 · Using -execdir. There is also -execdir (implemented by most find variants, but not a standard option).. This works like -exec with the difference that the given shell command is executed with the directory of the found pathname as its current working directory and that {} will contain the basename of the found pathname without its path (but GNU find will still prefix the …

Jul 20, 2016 · On the source code level at least for bash version 4.3, the exec built in is defined in builtins/exec.def. It parses the received commands, and if there are any, it passes things on to shell_execve() function defined in execute_cmd.c file.

Oct 3, 2018 · Oct 02 12:17:09 raspberrypi systemd[1]: Started Read pressure And Post to mqtt. Oct 02 12:17:09 raspberrypi systemd[1]: ReadPressure.service: Main process exited, code=exited, status=203/EXEC Oct 02 12:17:09 raspberrypi systemd[1]: ReadPressure.service: Unit entered failed state.

The numbers are file descriptors and only the first three (starting with zero) have a standardized meaning: 0 - stdin 1 - stdout 2 - stderr So each of these numbers in your command refer to a file descriptor. You can either redirect a file descriptor to a file with > or redirect it to another file descriptor with >&

Apr 19, 2021 · exec script.sh replaces the current shell with the one defined in the shebang line of script.sh, and uses that interpreter to run the rest of the file. This could be anything from /bin/sh to /usr/bin/python, no matter what the filename extension is. …

May 25, 2016 · Note: The tee process outputs to the original stdout (=the original filedescriptor 1) because, as you can learn from /searching bash(1) for Simple Command Expansion and Process Substitution, process substitution ( >() <()) happens (along with other expansions) before redirections get executed, which means that the redirection in exec 1> >(tee ...

Feb 24, 2016 · I know the exec command doesn't fork, and will retain the process and replace the process image to the COMMAND. Then the current process is just like if executed with the COMMAND. Then the current process is just like if executed with the COMMAND.

Feb 14, 2021 · It seems my attempt to redirect stdout back to terminal has no effect: exec 1>&7. Perhaps, exec 1>&7 happens AFTER logfile has been written and its content sent to terminal. And I don't understand the output to terminal when the script is executed. I'm guessing exec > >(tee logfile) is blocked until cat logfile reads it.