On Fri, Sep 9, 2016 at 12:36 PM, <vendel...@gmail.com> wrote: > > On Friday, 9 September 2016 18:45:24 UTC+2, Ian Lance Taylor wrote: >> >> On Fri, Sep 9, 2016 at 7:22 AM, <vend...@gmail.com> wrote: >> > >> > I was trying to read a longer text from stdin, without any newline. I >> > tried >> > it with many ways: fmt.Scan, bufio.NewScanner, bufio ReadLine, >> > ioutil.ReadAll. A sample code looks like this: >> > >> > stackoverflow.com/questions/27196195/golang-read-from-pipe-reads-tons-of-data#answer-27196786 >> > If the length was just a bit longer than 4096 characters, the result was >> > always the same: it was cut at 4096 characters. >> > >> > When I saved the text to a file, and read from there, every method >> > worked. >> > If I changed the spaces to newlines, every method worked from stdin. So >> > only >> > this combination was wrong. Looks like a bug for me. >> > >> > I wanted to use it for hackerrank.com excercises, where this is the >> > typical >> > input: long line given through stdin, without newline. >> > >> > Can anyone help me please? >> >> Show us the exact code you are running, and tell us about the system >> on which you are running it. > > Almost the same code as the example I linked, I only changed the log to fmt > print, and the buffer size from 4*1024 to 8*1024. So when I run it, enter a > string with 4900 characters without newline, it waits for more input. Even > if I end it with EOF (Ctrl+d) immediately, It writes this: Bytes: 4096 > Chunks: 1. > > I'm on Arch linux 32 bit. Latest go:
You are just typing the string on a terminal? I'm pretty sure that you are running into the terminal input buffer size, which is 4096 on GNU/Linux (look for N_TTY_BUF_SIZE in the kernel sources). That is how many characters you can type on a terminal in canonical mode before hitting a newline. This has nothing to do with Go. I expect that you will see the same behavior with the cat program. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
