i wrote a while script as part of a huge program. this script, once picked, begins to output data to the person using it. pretty easy, as the person doesn't have to keep typing commands to get the output that the while loop automatically throws out.
now, the thing is, while this while-script... (3 Replies)
Hi All,
Can someone let me know how i can exit a for loop without exiting the script itself .... will the break statement work ....
please help ....
-Regards (2 Replies)
Hi guys,
I'm new to unix but loving it!! BUT this is driving me nuts as i can't work out the best way to do it.
I have a while true loop that i use to monitor something. For my own reasons in ths script i have disabled the CTRL C using the trap command. But i want to put in a option to exit... (5 Replies)
im running a while loop as a file watcher, with incremental counter on the retries..however when the retries reach it's limit i want it exit and echo and error and stop the batch. Im not sure the code i have will do that already...
Here is what i have that works:
#!/usr/bin/ksh
count=0... (2 Replies)
I am trying to get my program to exit when the answer to my question is positive, if I am asking if the answers are correct in the entries that the user inputted and the user says no how do I then have it exit? If they say everything is correct then it continue into the program, I think I am close... (2 Replies)
Hello,
I am optimizing my low level C coding style.
I have run into an strange C implementation fact:
----------------------------------------------------
unsigned int X;
for ( X = 0; X < 10; X++ ) printf("%u\n",X);
Produces:
0
1
2
3
4
5
6
7
8 (3 Replies)
hi,
how to exit from "if" loop?actually i have mutliple "if" conditions, i have to exit from each "if" loop,if it is true...:confused:
Please suggest me... (3 Replies)
Below for loop not exiting. Can someone help?
JBOSS_INST_ARGS=01 02
if ; then
for i in $JBOSS_INST_ARGS; do
/u/jboss-6.1.0.Final/bin/jboss_init_wise$i.sh start;
done (8 Replies)
Hi Folks -
Here is a for loop I've created and I just wanted to see if this was okay practice:
for M in NAME1 NAME1 NAME3
do
echo "Executing MaxL:" $M >>${_LOGFILE} 2>&1
. ${_STARTMAXLPATH}startmaxl.sh ${_MAINPATH}${_MAXLPATH}$M.mxl
_RC=$?
if
then
... (7 Replies)
Discussion started by: SIMMS7400
7 Replies
LEARN ABOUT ULTRIX
dup
dup(2) System Calls Manual dup(2)Name
dup, dup2 - duplicate an open file descriptor
Syntax
newd = dup(oldd)
int newd, oldd;
dup2(oldd, newd)
int oldd, newd;
Description
The system call duplicates an existing object descriptor. The argument oldd is a small non-negative integer index in the per-process
descriptor table. The value must be less than the size of the table, which is returned by The new descriptor, newd, returned by the call
is the lowest numbered descriptor that is not currently in use by the process.
The object referenced by the descriptor does not distinguish between references using oldd and newd in any way. Thus, if newd and oldd are
duplicate references to an open file, and calls all move a single pointer into the file. If a separate pointer into the file is desired, a
different object reference to the file must be obtained by issuing an additional call.
In the second form of the call, specify the value of newd needed. If this descriptor is already in use, the descriptor is first deallocated
as if a call had been done.
Return Values
The value -1 is returned if an error occurs in either call. The external variable errno indicates the cause of the error.
Diagnostics
The and system calls fail under the following conditions:
[EBADF] The oldd or newd is not a valid active descriptor.
[EMFILE] Too many descriptors are active.
[EINTR] The or function was terminated prematurely by a signal.
See Alsoaccept(2), close(2), getdtablesize(2), lseek(2), open(2), pipe(2), read(2), socket(2), socketpair(2), write(2)dup(2)