1. 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)

2. 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)

3. 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)

4. 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)

5. 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)

6. 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)

7. 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)

8. 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)

9. 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)

10. 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)