10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
all,
i've been reading to try and get an abstract idea of the process effeciency of commands , sed, bash, perl, awk, find, grep, etc
which processes will spawn?, fork?, launch subshell?, etc and under what conditions?
how do you know which commands have the faster and better stdio... (2 Replies)
Discussion started by: f77hack
2 Replies
2. Shell Programming and Scripting
Hi Experts,
Quick question:
I am trying to get the output with decimal and floating point but not working:
echo "20.03" | awk '{printf "%03d.2f\n" , $0 }'
020.2f
How to get the output as :
020.03
Thank you. (4 Replies)
Discussion started by: rveri
4 Replies
3. Shell Programming and Scripting
Hi,
I am using below awk code to convert a csv file data into fixed file format.
awk 'BEGIN { FS = ","
fmt = "%10s%010d%10s%d%1d\n" }
NR>1 { printf fmt, $1, $2, $3, $4*100, $5 }' /data/mydata.csv > /data/fixed.dat
Data in mydata.csv
================... (2 Replies)
Discussion started by: kbmkris
2 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I am using below awk code to convert a csv file data into fixed file format.
awk 'BEGIN { FS = ","
fmt = "%10s%010d%10s%d%1d\n" }
NR>1 { printf fmt, $1, $2, $3, $4*100, $5 }' /data/mydata.csv > /data/fixed.dat
Data in mydata.csv
================... (1 Reply)
Discussion started by: kbmkris
1 Replies
5. UNIX for Dummies Questions & Answers
Hi,
Does anyone know a easy way to printf $3,$4, ... all the way to the last field in the file? I will need to modify $1 and $2 and then printf modified $1 and $2 and the rest of the fields(which are not changed).
I know I can use NF as the total number of field.
Do I use a for next statement to... (4 Replies)
Discussion started by: whatisthis
4 Replies
6. Shell Programming and Scripting
can you take input from another command and do printf?
such as
awk '{print $2,$1}' | sort -k1,1 -k2,2 | printf "%-10s,%15s"
this does not work.. but there must be a way.. please help me..
thank you. (3 Replies)
Discussion started by: hankooknara
3 Replies
7. Programming
i'm tring to make 2 processes each read from the same file but only one of them read the file.
FILE * fileptr1;
fileptr1 = fopen("file1.txt","rt");
pid2=fork();
while(1)
{
fscanf(fileptr1,"%s",temp1);
if(feof(fileptr1)==0)
{
printf("%i",getpid()); //id of current process ... (6 Replies)
Discussion started by: ddx08
6 Replies
8. UNIX for Advanced & Expert Users
I am trying to figure out why when i have the following code
int main( { printf("0\n"); fork(); printf("1\n"); exit(0);}
and type in the shell
a.out | cat
the output of this program is
0
1
0
1
instead of
0
1
1
does anyone know? (3 Replies)
Discussion started by: Phantom12345
3 Replies
9. Programming
Hello!
First of all, sorry for my English, I'm not a native English speaker.
I know, that printf() function uses write() function. "man cancellation" says that write() function is a cancellation point. But when I call pthread_cancel() for my thread, which calls printf() in infinite cycle, it... (4 Replies)
Discussion started by: prankster
4 Replies
10. UNIX for Advanced & Expert Users
Hey guys,
I'm given this bit of code, but, I'm having some problems executing it with the functions I've defined so far. I'm suppose to define the funtions "parse" and "execute." Parse splits the command in buf into individual arguments. It strips whitespace, replacing those it finds with NULLS... (3 Replies)
Discussion started by: richardspence2
3 Replies