It may be an operating system incompatibility. POSIX allows a signal to interrupt a read() command, but I don't think it requires it.
Tooling up to see if I can reproduce this behavior in raw C.
---------- Post updated at 03:32 PM ---------- Previous update was at 03:14 PM ----------
Thought I'd looked at that before, and had. This program:
So receiving SIGALRM doesn't necessarily cause read() to return EINTR.
Looking around the man pages, I find this in man 7 signal:
Let's try that out:
So Linux signals can cause EINTR, but it's an optional feature.
If KSH is really, really supposed to get EINTR when signalled, that it doesn't is a bug in KSH since Linux can do that if you use sigaction instead of signal(). (You can also turn it off in sigaction with SA_RESTART). I'm not convinced it's supposed to be a portable feature in any case though.
I have a process to terminate, and when keying Control C/ kill -int , it takes 15 minutes to half an hour to terminate the process. I've tried using kill -2, or keying control c twice, however the process seem
to be killed abruptly, without writing into the log file.
So the only way in order to... (8 Replies)
any idea on how to timeout the read statement for ksh?
for bash u can use read -t option
-t timeout
Cause read to time out and return failure if a complete
line of input is not read within timeout seconds. This
option has ... (2 Replies)
Hi All,
Is there any way to read the previous line in file reading ?
or
is there any way to read a line twice in KSH ?
thanks in advance !!
Srini (6 Replies)
I am stuck with a problem while reading data from a file..
while
do
read line
#do some operations and if some condition is satisfied, ask the user to enter his choice.
# using the choice continue operations.
done < fileBeingRead.txt
The... (4 Replies)
hello everyone,
I'm having a problem doing signal handling so I post this thread to see if I could get help.
I want asynchronous signal handling, that means when I'm processing a signal (signal 1), if the same signal comes (signal 2) that signal (signal 2) shall be processed; and moreover,... (7 Replies)
hi,
I'm a newbie to shell scripting. I wanted to initialise an array using basic for loop and read it.
Then i want to print it as a .CSV file..
Any help would me much appreciated.. (1 Reply)
I receive the following warning messages on a very new machine which has FreeBSD 8.1 x64 installed on it:
Interrupt storm detected on "irq 20" throttling interrupt source
It is unclear what this means and what its origins are (motherboard? CPU? RAM?).
I can start the desktop and the message is... (4 Replies)
Hello,
I have used a chunk of ksh script similar to this in many places without any issue:
while :
do
print;
read OPTION?"Enter a number (q to quit): "
expr ${OPTION} + 1 >/dev/null 2>&1
CHECKVAL=$?
if }" != ${OPTION} ]; then
... (2 Replies)
Greetings. This is my first post in this forum; I hope y'all find it useful. One caveat: "Concise" is my middle name. NOT! :D
I am almost done with a shell script that runs as a daemon. It monitors a message log that is frequently written to by a database server but it it works my client will... (2 Replies)