Qshell Interpreter (qsh) - FTP Directory Listing - IBM

10 Qshell Interpreter (qsh)
– The fg or bg built-in utilities.
– Using the Suspend key (typically z) to send the SIGTSTP signal to the
foreground process group.
– Using the Stop key (typically s) to send the SIGSTOP signal to the
foreground process group.
– Using the Restart key (typically q) to send the SIGCONT signal to the
foreground process group.
– Using the Interrupt key (typically c) to send the SIGINT signal to the
foreground process group. As an alternative, you can use SysReq 2 from an
interactive shell session to send the SIGINT signal to the shell interpreter
process and any currently running child processes.
v There is no support for the End-of-file key (typically d). As an alternative,
use a here-document (page 21) to redirect text entered at the command line to
standard input of a utility.
v The file /dev/null is not a “bit-bucket” but a regular file. Many scripts redirect
output to /dev/null when it is not necessary to save the output. A script that uses
this technique does not need to be changed but the /dev/null file can grow very
large and should be periodically removed. qsh uses the file /dev/qsh-stdin-null to
redirect standard input to a zero-length file.
v The verbose option is ignored when the stdin option is not set.
v When calling a command, you can pass a maximum of 255 parameters to the
command.
v When using path name expansion with some case insensitive file systems, you
must use upper case characters in the pattern. For example, to list all of the
program objects in the QSHELL library you should use this command:
ls /qsys.lib/qshell.lib/*.PGM.
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