You are right that head should send a SIGPIPE to fold that should send a SIGPIPE to tr that should send a SIGPIPE to cat.
And each program in the chain should terminate.
It's not reliable though, a signal *can* get lost, especially if the system is very busy. If this also happens on an idle system then there is a bug somewhere (in one of the programs or in the shell's pipe handling).
In one of my old scripts (using /bin/sh for many LUnix platforms) I had limited it with
and, for safety, if the resul string was too short, I repeated it in a loop.
Hi, how do I use /dev/urandom to generate a single number between 1-100? I can od /dev/urandom but it gives me an endless list of random numbers, I just want 1 between 1-100. How can I get that? Thanks. (12 Replies)
Hi, Anyone can help
My solaris 8 system has the following
/dev/null , /dev/tty and /dev/console
All permission are lrwxrwxrwx
Can this be change to a non-world write ??
any impact ?? (12 Replies)
Hi,
Excuse my ignorance here - I'm a networks man and my knowledge of all things unix is somewhat limited.
We have a very large file (/var/tmp/mond.log) that we need to zero - does the "cat /dev/null > /var/tmp/mond.log" command achieve this? (4 Replies)
I am having problems using soundes. Until a few moments ago
the following commands produced errors and no sound:
cat /usr/share/apps/kolf/sounds/blackhole.wav/ > /dev/dsp yielded:
/dev/dsp: Invalid argument
cat /usr/share/apps/kolf/sounds/blackhole.wav > /dev/audio yelded:
/dev/audio:... (3 Replies)
Hello,
I'm trying to send the error output of a 'cat' operation to /dev/null like this:
cat /dirA/dirB/temp*.log > /dirA/dirB/final.log 2>/dev/null
This works perfectly in a terminal, but not when placed in a script.
If there are no files matching temp*.log the script outputs an error... (7 Replies)
i have few log files that are input to my perl script...
i am executing the script as below
cat RTR*.log | test.pl
and getting the following error
-ksh: 25014: Memory fault(coredump)
cat: write error: Connection reset by peer
can anyone help me on this....
Thanks in... (2 Replies)
My AIX-based accounting program runs an end-of-day process that requires all users to be logged out. Sometimes I have a user that leaves for the day and forgets to logout. Is there any way I can cleanly log a user out without killing their process? (4 Replies)
Hi,
In our HP-UX B.11.11. I could not find dev/urandom and dev/random
Are all pseudo-devices implemented as device drivers, or in need to run /configure some package to install the package to have dev/urandom.
Please help (4 Replies)