No. The output of a program never passes through the shell’s hands. Without redirection, it goes straight to the TTY. With redirection, it goes straight to whatever file or pipe it was directed to. The shell has no idea what the process sent to stdout/stderr.
The standard warnings regarding use of tcsh/csh apply (don’t use it for scripting, due to its inherent limitations), but here’s the translation: if ( “$1” == “” ) then # parentheses not strictly needed in this simple case echo “variable is empty” else echo “variable contains $1” endif Note, though, that if you were to … Read more
In csh, you can either try env: % env LD_LIBRARY_PATH=/foo/bar myprogram or, a subshell: % (setenv LD_LIBRARY_PATH /foo/bar; myprogram)
Bash alias does not directly accept parameters. You will have to create a function. alias does not accept parameters but a function can be called just like an alias. For example: myfunction() { #do things with parameters like $1 such as mv “$1” “$1.bak” cp “$2” “$1” } myfunction old.conf new.conf #calls `myfunction` By the … Read more