That is interesting. But it makes sense to me. And I would not consider it a bug. BASH is doing what you told it to do. It is a recursive call. But I do think that Chet would agree that crashing the OS is a "bad thing" [grin]. I'm just not too sure what he could do about it. If it were my system, I would look at the process limits set on your user id. Each recursive invocation creates a new process. Until the system "reacts poorly" (crashing is a type of acting poorly), or you try to exceed your process limit. But if you don't have a limit on the number of fork()'d processes, this latter resource restriction would not stop the recursion. I have pasted a transcript below which I hope helps a bit.
$uname -a Linux my-home-system 3.18.3-201.fc21.x86_64 #1 SMP Mon Jan 19 15:59:31 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux $ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 15204 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 4096 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited $ ulimit -u 5 #limit the number of fork()'d processes $ function example() { > echo $(example) > } $ example bash: fork: retry: Resource temporarily unavailable bash: fork: retry: Resource temporarily unavailable ^Cbash: fork: retry: Resource temporarily unavailable ^C^C^C^Cbash: fork: retry: Resource temporarily unavailable bash: fork: Resource temporarily unavailable I think this may be a "your bullet, your gun, your foot" type problem. On Tue, Mar 3, 2015 at 9:17 PM, x Slack x Ruan <xsla...@live.fr> wrote: > Good evening. > > My name is Ruan, was doing some scripting with bash, to launch a script my > system crashed and restarted. > When I look at the command syntax. > > > function example () { > echo `example` > } > example > > > The echo generates an infinite loop calling the function without stopping, I > could see the top command. > Thousands of bash were being opened, I would report this bug. > > One question, I tried to fix myself but I did not really bash the error > files. > > In this case how it could contribute? > > Thank U -- He's about as useful as a wax frying pan. 10 to the 12th power microphones = 1 Megaphone Maranatha! <>< John McKown