Those look more backticks to me `. On my system single quotes aren't slanted '. Are backticks better than double quotes?
Quote:
Originally Posted by MadeInGermany
You need a space after the [ and before the closing ]
Shorter is
Both are not portable.
That worked . Can you please explain why you need spaces at the beginning and end [ ] brackets for if statements? I always forget when I don't do shellscripting for awhile.
I sometimes forget how awesome awk is .
What do you mean by not portable? Is it not posix compatible? Is there a way to make it portable?
I don't understand what you're trying to do. On a system with no active message queues, shared memory segments, or semaphores, the output from ipcs will be something like:
So, the output from:
will be:
and the condition in your if statement will always evaluate to false.
If, in addition to showing us code that doesn't work, you would also tell us what you're trying to do, we might be better able to help.
And, no. You do not want to enclose a command substitution in backquotes unless you are trying to perform a command substitution on the results of a command substitution.
I don't understand what you're trying to do. On a system with no active message queues, shared memory segments, or semaphores, the output from ipcs will be something like:
So, the output from:
will be:
and the condition in your if statement will always evaluate to false.
If, in addition to showing us code that doesn't work, you would also tell us what you're trying to do, we might be better able to help.
And, no. You do not want to enclose a command substitution in backquotes unless you are trying to perform a command substitution on the results of a command substitution.
It looks like we are using two different distros of Linux. Our output is a bit different. I am using Fedora.
I am working on a C project that spawns threads, creates shared memory, and creates semaphore arrays. It is annoying to have to keep typing or searching my bash history for:
So I was thinking I could do something like this.
I wanna do that first behavior until $2 equals Semaphore.
)
I am not sure how to this. I have been reading the bash documentation for several days with no luck.
You had several options given to you in your duplicate thread, and it's not clear whether you tried any of them. Particularly, my suggestion with the while loop and printing the options to help figure out why it's not matching when it apparently should.
Please try that, and get back to me, otherwise I'm just wild guessing.
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