Detect presence of stdin contents in Bourne Shell

Posted by l0b0 on Stack Overflow See other posts from Stack Overflow or by l0b0
Published on 2010-03-16T17:43:44Z Indexed on 2010/03/16 18:01 UTC
Read the original article Hit count: 411

Filed under:

bourne-shell

I'm writing a Bourne Shell script that may or may not receive input from stdin (as in foo.sh < test.txt, non-interactively). How do I check whether there is anything on stdin, to avoid halting on while read -r line...?

Related posts about bourne-shell

Detect presence of stdin contents in Bourne Shell

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm writing a Bourne Shell script that may or may not receive input from stdin (as in foo.sh < test.txt, non-interactively). How do I check whether there is anything on stdin, to avoid halting on while read -r line...? >>> More
Split string by newline and space in Bourne shell

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm currently using the following to split a file into words - Is there some quicker way? while read -r line do for word in $line do words="${words}\n${word}" done done >>> More
Find maximum positive integer value in Bourne Shell

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm checking a counter in a loop to determine if it's larger than some maximum, if specified in an optional parameter. Since it's optional, I can either default the maximum to a special value or to the maximum possible integer. The first option would require an extra check at each iteration, so I'd… >>> More
Bourne Shell: Graceful way to get exit status

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there a more graceful way to do this (bourne shell)? IsThereAnyApplesLeft applesLeft=$? Normally in c or java I would do: applesLeft=IsThereAnyApplesLeft >>> More
Bourne Shell: Convert ~/Desktop to /users/me/Desktop

as seen on Stack Overflow - Search for 'Stack Overflow'
Incredably annoyed at the Java Keytool. So much so that I have created a new tag: "SunSuck". The keytool does not resolve impartial directories. Ie this works: keytool -keystore "/users/me/Desktop" ... This doesn't: keytool -keystore "~/Desktop" ... Is there something that I could call… >>> More

Developer IT

Detect presence of stdin contents in Bourne Shell - Developer IT

Detect presence of stdin contents in Bourne Shell

bourne-shell

Related posts about bourne-shell

Detect presence of stdin contents in Bourne Shell

Split string by newline and space in Bourne shell

Find maximum positive integer value in Bourne Shell

Bourne Shell: Graceful way to get exit status

Bourne Shell: Convert ~/Desktop to /users/me/Desktop

Categories cloud