Ifs | search
Click here to view Ifs news from 60+ newspapers.
Bookmark or Share- shell - Understanding IFS - Unix & Linux Stack ExchangeThe following few threads on this site and StackOverflow were helpful for understanding how IFS works: What is IFS in context of for looping? How to loop over the lines of a file Bash, read line b...
- How to temporarily save and restore the IFS variable properly?How do I correctly run a few commands with an altered value of the IFS variable (to change the way field splitting works and how "$*" is handled), and then restore the original value of I...
- Why is `while IFS= read` used so often, instead of `IFS=; while read..`?The IFS= read -r line sets the environment variable IFS (to an empty value) specifically for the execution of read. This is an instance of the general simple command syntax: a (possibly empty) sequence of variable assignments followed by a command name and its arguments (also, you can throw in redirections at any point).
- Understanding "IFS= read -r line" - Unix & Linux Stack ExchangeIFS is the Input Field Separator, which means the string read will be split based on the characters in IFS. On a command line, IFS is normally any whitespace characters, that's why the command line splits at spaces. Doing something like VAR=value command means "modify the environment of command so that VAR will have the value value".
- What is the meaning of IFS=$'\\n' in bash scripting?The default value for IFS consists of whitespace characters (to be precise: space, tab and newline). Each character can be a word boundary. So, with the default value of IFS, the loop above will print: Word: foo:bar Word: baz Word: rab In other words, the shell thinks that whitespace is a word boundary. Now, try setting IFS=: before executing ...
More
