08-02-2017
This User Gave Thanks to rdrtx1 For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hope somebody is happy.
NR==1 {
num_columns=split( $0, menuend );
next;
}
{
split( $0, substrend );
for ( i=1; i<=NF; i++ ) {
minuend -= substrend;
}
}
END {
print "Result:";
for ( i=1; i<=num_columns; i++ ) {
printf(... (3 Replies)
Discussion started by: awkward
3 Replies
2. Shell Programming and Scripting
I want an integer to be prefix with some zeros so that it makes the integer 5 digit always:
For eg: if the digit is 8 i need 00008
if the digit is 8976 ans sud be 08976.
Could anyone say simple and efficient commands to this in ksh.
Thanks a lot... (4 Replies)
Discussion started by: PRKS
4 Replies
3. UNIX for Dummies Questions & Answers
We are running AIX. Shell is ksh. I used to have the ability to recall commands from prior sessions using <exc> k. Now, suddenly, I only can recall commands run during the current session. When I start a session, I have no command history. Also, when I run the shell command from a current... (1 Reply)
Discussion started by: boylepeterj
1 Replies
4. UNIX for Dummies Questions & Answers
Hello,
Hello,
I use the following command to split a file:
split -Number_of_Lines Input_File MyPrefix_
output is
MyPrefix_a
MyPrefix_b
MyPrefix_c
......
Instead, how can I get numerical values like:
MyPrefix_1
MyPrefix_2
MyPrefix_3
...... (2 Replies)
Discussion started by: Gussifinknottle
2 Replies
5. Shell Programming and Scripting
hi
i want to append zeros to a given number ( varying digits). the total length of the output should be 10 digits. For example:
1)input is var=347
output should be NewVar=0000000347
2) input is var=123456
output should be NewVar=0000123456
i am able to acheive this using typeset... (1 Reply)
Discussion started by: somi2yoga
1 Replies
6. Shell Programming and Scripting
Hi All,
I have 100 files with names like this:
1.dat, 2.dat, 3.dat until 100.dat.
My dat files look like this:
42323 0
438939 1
434 0
0.9383
3434
120.23 3
234
As you can see in the second column, some numbers are missing. I want to fill those missing places with 0's in all... (3 Replies)
Discussion started by: shoaibjameel123
3 Replies
7. Shell Programming and Scripting
Hi,
i have a variable which conatins values like 00001,0003,00067,00459.
I want to use the values one by one and in the same form as they are like 00001,0003,00067,00459.
Also can anyone tell me how to increment those numbers by 1,keeping the format as same like 00002,0004,00068,00460.... (5 Replies)
Discussion started by: arijitsaha
5 Replies
8. Shell Programming and Scripting
Hi Forum.
I'm running the following awk command to extract the suffix value (pos 38) from the "AM00" record and append to the end of the "AM01" record.
awk 'substr($0,13,4)=="AM00" {SUFFIX = substr($0,38,2)} substr($0,13,4)=="AM01" {$0 = $0 SUFFIX} 1' before.txt > after.txt
Before.txt:... (2 Replies)
Discussion started by: pchang
2 Replies
9. Shell Programming and Scripting
Dear All,
assume i have a file with content:
<Start>6000</Start>
<Stop>7599</Stop>
the output is:
6000
7000
7100
7200
7300
7400
7599
how should we use any awk, sed, perl can do this task, means to extract the uniq prefixes from the start and stop prefix.
Thanks
Jimmy (3 Replies)
Discussion started by: jimmy_y
3 Replies
10. UNIX for Beginners Questions & Answers
Hi,
I am trying to remove trailing zeros from numbers in a csv file.
CSV Input : 0.5000,abc,2.00,2.400,285.850,285a.850,205.180800,mno000,a0b0,2.860
Expected Output :
.5,abc,2,2.4,285.85,285a.850,205.1808,mno000,a0b0,2.86
Can you please help.
Thanks. (11 Replies)
Discussion started by: manubatham20
11 Replies
postwait(2) System Calls Manual postwait(2)
NAME
postwait: pw_getukid(), pw_wait(), pw_post(), pw_postv(), pw_getvmax() - lightweight synchronization mechanism
SYNOPSIS
DESCRIPTION
Postwait is a fast, lightweight sleep/wakeup mechanism that can be used for synchronization by cooperating kernel threads within a single
process or between separate processes.
A thread calls to block. It resumes execution when it is posted by another thread, the call expires, or is signaled. If one or more posts
are already pending, returns immediately.
Threads using postwait are identified by their ukid. A thread retrieves its ukid by calling It shares this ukid with anyone it chooses by
any means it considers appropriate (for example, shared memory).
is called with a timeout ts. If ts is NULL, the thread will not timeout. It will remain blocked until posted or a signal wakes it up.
If ts points to a zero-valued timespec, will return immediately with a value (and indicating whether or not it was posted.
If ts points to a timespec whose value is greater than zero, the thread will block for that amount of time unless it is posted or inter-
rupted by a signal, in which case the timespec pointed to by ts is updated with the remaining time. The return value and are set to indi-
cate the reason the call returned.
is used to post many threads with a single call. It posts to all threads in the targets array. An value for each target is returned in
the errors array. (0 indicates success.) If the errors pointer is zero, no target-specific errors are copied out.
There is a maximum number of threads that can be posted with a single call. This value is returned by
Posts sent to a kernel thread that already has a post pending against it are discarded.
RETURN VALUE
returns 0 if it succeeds, -1 otherwise.
returns 0 if posted, -1 otherwise.
returns 0 if the post succeeds, -1 otherwise.
returns 0 if every post succeeds, -1 otherwise.
returns the maximum number of kernel threads that can be posted with a single call to
ERRORS
sets to one of the following values if it fails:
ukid points to an illegal address. The reliable detection of this error is implementation dependent.
sets to one of the following values if it fails:
was called with a timeout of 0 but the caller has no post(s) pending.
was called with a timeout that expired.
ts points to an illegal address. The reliable detection of this error is implementation dependent.
was interrupted
by a signal.
The timespec pointed to by ts is invalid.
sets to one of the following values if it fails:
The ukid refers to a non-existent kernel thread.
sets to one of the following values if it fails:
targets points to an illegal address. The reliable detection of this error is implementation dependent.
errors points to an illegal address. The reliable detection of this error is implementation dependent.
count is less than 0.
count exceeds the maximum value (as returned by
A ukid refers to a non-existent kernel thread.
postwait(2)