Comment on Bug #915: Please helpparentComments−smartmic6yIt is called process substitution and specific to Bash (not POSIX shell compliant). The output of the commands in parenthesis will become runtime (file) inputs for the diff command.More: https://www.gnu.org/software/bash/manual/html_node/Process-S...−emmelaich6yIt's not specific to bash -- it's in ksh as well. And zsh.I'm also pretty sure it originated in ksh, not bash.
Comments
It is called process substitution and specific to Bash (not POSIX shell compliant). The output of the commands in parenthesis will become runtime (file) inputs for the diff command.
More: https://www.gnu.org/software/bash/manual/html_node/Process-S...
It's not specific to bash -- it's in ksh as well. And zsh.
I'm also pretty sure it originated in ksh, not bash.