iSeries QSHELL

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

iSeries QSHELL
Developer(s)IBM
Operating systemIBM i
PlatformIBM System i
Standard(s)POSIX, X/Open
Available inEnglish
TypeCommand shell
WebsiteQshell

iSeries QSHELL is a command line interpreter (shell) running on the IBM iSeries computer platform. Qshell is based on POSIX and X/Open standards. IBM created the Qshell interpreter primarily to provide support for the Java Development Kit (JDK) on their iSeries line of computers.[citation needed] The Qshell interpreter can be used interactively or for running shell scripts.

Differences from other shells[edit]

Qshell differs from other shell environments in a number of ways:[1]

  • No support for job control
  • No support for the <> redirection operator (though the QIBM_QSH_CMD_OUTPUT environment variable can be used to redirect output[2])
  • No support for command line editing (Command retrieval and editing is handled at an abstraction level between user and shell.)
  • The number of command-line arguments is limited to 255

Compared to PASE, another shell on the iSeries computer[edit]

According to IBM, QSHELL is a “UNIX-like” interface built over OS/400. The commands you issue point to programs in a “QSHELL” library. To use QSHELL, key STRQSH or QSH on an iSeries command line, or pass a command string to the QSH command, or use UNIXCMD, an open-source utility created by Scott Klement which allows the execution of QShell commands through an RPG special file.[3]

PASE is a “real” UNIX — it is actually AIX. It looks similar to QSHELL, but doesn’t have some of the limitations built into QSHELL. To use PASE, CALL QP2TERM.

Further reading[edit]

  • Holt, Ted. Qshell for iSeries. ISBN 1-58347-046-8.

See also[edit]

References[edit]

External links[edit]