I am writing a bash script; I execute a certain command and grep.
pfiles $1 2> /dev/null | grep name # $1 Process Id
The response will be something like:
sockname: AF_INET6 ::ffff:10.10.50.28 port: 22 peername: AF_INET6 ::ffff:10.16.6.150 port: 12295
The response can be no lines, 1 line, or 2 lines.
In case grep returns no lines (grep return code 1), I abort the script; if I get 1 line I invoke A() or B() if more than 1 line. grep's return code is 0 when the output is 1-2 lines.
grep has return value (0 or 1) and output.
How can I catch them both ? If I do something like:
OUTPUT=$(pfiles $1 2> /dev/null | grep peername)
Then variable OUTPUT will have the output (string); I also want the boolean value of grep execution.