Stephen Carpenter <[EMAIL PROTECTED]> wrote: | to make bash wait a certain amount of time... | sleep(X) # X = number of seconds to "sleep" | as for detecting an error.... | scripts can return errors just like any program... | I think maybe hmmm I forget exactly how...but I know its no differnt than a | program | -Steve | | BRIAN SCHRAMM wrote: | | > I am trying to tell if a program is passing back an error in a Bash | > script. I would like to branch on receipt of the error to a wait | > statement that will give me about 20 seconds and then retry. | > | > My trouble is I cannot remember how to detect the error and how to | > make the shell wait a definite amount of time. Can anyone help me? | >
You just need to check the return code of the program. This is stored in the shell variable "$?". So #!/bin/bash your_program_here if [ "$?" = "0" ] then echo "Program successful" else echo "Program unsuccessful" fi You have to rely on the fact that whoever wrote "your_program_here" returns a non-zero status if the program fails. The loop implementation is left as an exercise... Gary -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
