Package: pssh
Version: 1.4.3-1
Hello,
Steps to reproduce :
1) create a hosts.txt file
touch /tmp/hosts.txt # you can put hosts in it, or leave it empty
2) run pssh normaly
parallel-ssh -h /tmp/hosts.txt ls # it works well
3) create a simple script calling pssh
vi /tmp/test.sh
chmod a+x /tmp/test.sh
cat /tmp/test.sh
#!/bin/sh
parallel-ssh -h /tmp/hosts.txt ls
4) run the script
/tmp/test.sh # it hangs until killed
killall test.sh
Looking in the code in /usr/bin/parallel-ssh, it blocks at line 143 in
the buffer_input() function :
stdin = sys.stdin.read()
To work around the problem, I applied the following patch :
--- /tmp/parallel-ssh 2009-09-30 21:44:59.000000000 +0200
+++ /usr/bin/parallel-ssh 2009-09-30 21:45:29.000000000 +0200
@@ -151,7 +151,7 @@
os.makedirs(flags["outdir"])
if flags["errdir"] and not os.path.exists(flags["errdir"]):
os.makedirs(flags["errdir"])
- stdin = buffer_input()
+ stdin = ""
sem = threading.Semaphore(flags["par"])
threads = []
for i in range(len(hosts)):
In fact, pssh in also designed to be called with a pipe this way :
cat file_to_send | parallel-ssh -h /tmp/hosts.txt COMMAND_READING_STDIN
example useless command :
cat file_to_send | parallel-ssh -h /tmp/hosts.txt grep search_string
As I do not use this, I use my patch to call pssh from scripts.
But If we don't want to loose the "pipe" feature, we have to find a
better patch.
Any idea ?
Marc
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