What if command line arguments not specified

jayawant01 · #1 (**permalink**) 06-11-08, 05:13

Hi can any one help me with this.....

The below pasted extract is part of the script which is invoked from another script..

gsdgp_init() {
typeset CALLER=${SCRIPT}
typeset SCRIPT=${SCRIPT}.gsdgp_init
typeset DBSPEC=${1:?${SCRIPT}

BSPEC}

gpd_terminate
i am not specifying any argument at command prompt so from where will the value of variable DBSPEC will come .....

pdreyer · #2 (**permalink**) 06-12-08, 01:53

man ksh

Code:

                        | parameter set and not null | parameter set and null
     ${parameter:-word} | substitute parameter       | substitute word
     ${parameter-word}  | substitute parameter       | substitute null
     ${parameter:=word} | substitute parameter       | assign word
     ${parameter=word}  | substitute parameter       | substitute parameter
     ${parameter:?word} | substitute parameter       | error, exit
     ${parameter?word}  | substitute parameter       | substitute null
     ${parameter:+word} | substitute word            | substitute null
     ${parameter+word}  | substitute word            | substitute word

                                 | parameter unset
     ${parameter:-word}          | substitute word
     ${parameter-word}           | substitute word
     ${parameter:=word}          | assign word
     ${parameter=word}           | assign null
     ${parameter:?word}          | error, exit
     ${parameter?word}           | error,exit
     ${parameter:+word}          | substitute null
     ${parameter+word}           | substitute null

jayawant01 · #3 (**permalink**) 06-13-08, 07:03

can u please explain little more ???

Internet Services

Web Development

Digital Marketing

Consumer Tech