file date vs. system date


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers file date vs. system date
# 8  
Old 09-11-2001
Yes, even a one character write to a file without changing the file size will indeed update ctime. You can verify this with fewer keystrokes than you spent asking the question:

print -n a > x
ls -lc x
# wait a minute
print -n b > x
ls -lc x

Also the manpage for write(2) states:
Quote:
Upon successful completion, where nbyte is greator than 0, write() will mark for update the st_ctime and st_mtime fields of the file
# 9  
Old 09-11-2001
Yep, I already tried it myself, but the - excellent - info you gave can be useful to other people as well. I am not a developer so I rarely wander outside the '1m' man world. Thanks for the quote anyway!
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Answers to Frequently Asked Questions

Compare date in .txt with system date and remove if it's lesser than system date

I m working on shell scripting and I m stuck where in my .txt file there is column as expiry date and I need to compare that date with system date and need to remove all the rows where expiry date is less than system date and create a new .txt with update. (1 Reply)
Discussion started by: Stuti
1 Replies

2. UNIX for Beginners Questions & Answers

Compare date in .txt with system date and remove if it's lesser than system date

Can someone help me with the code wherein there is a file f1.txt with different column and 34 column have expiry date and I need to get that and compare with system date and if expiry date is <system date remove those rows and other rows should be moved to new file f2.txt . I don't want to delete... (2 Replies)
Discussion started by: Stuti
2 Replies

3. SCO

Cannot use 'date -t' to set the system date and time

Hi! All, I am trying to reset the date and time since the change in time over the weekend. I cannot issue the command date -t 201703131330. The system gives me an error invalid option. This happens on my SCO OpenServer 5.0.7 and 5.0.6. Do anyone have an idea why? I even tried using... (6 Replies)
Discussion started by: trolley
6 Replies

4. Shell Programming and Scripting

Compare the system date with date from a text file

I get the date that's inside a text file and assigned it to a variable. When I grep the date from the file, I get this, Not After : Jul 28 14:09:57 2017 GMT So I only crop out the date, with this command echo $dateFile | cut -d ':' -f 2,4The result would be Jul 28 14:57 2017 GMT How do I... (3 Replies)
Discussion started by: Loc
3 Replies

5. Shell Programming and Scripting

Adding days to system date then compare to a date

Hi! I am trying to read a file and every line has a specific date as one of its fields. I want to take that date and compare it to the date today plus 6 days. while read line do date=substr($line, $datepos, 8) #date is expected to be YYYYMMDD if ; then ...proceed commands ... (1 Reply)
Discussion started by: kokoro
1 Replies

6. UNIX for Dummies Questions & Answers

Comparing Output Date to Current System Date

Hi Guys, Anyone who knows how to compare the current date with the a file containing a date, say for example I have a file that looks like this: Command was launched from partition 0. ------------------------------------------------ Executing command in server server6 Fri Dec 16... (7 Replies)
Discussion started by: rymnd_12345
7 Replies

7. UNIX for Dummies Questions & Answers

Delete a row from a file if one column containing a date is greater than the current system date

Hello gurus, I am hoping someone can help me with the required code/script to make this work. I have the following file with records starting at line 4: NETW~US60~000000000013220694~002~~IT~USD~2.24~20110201~99991231~01~01~20101104~... (4 Replies)
Discussion started by: chumsky
4 Replies

8. Shell Programming and Scripting

how to get what date was 28 days ago of the current system date IN UNIX

Hi, Anybody knows how to get what date was 28 days ago of the current system date through UNIX script. Ex : - If today is 28th Mar 2010 then I have to delete the files which arrived on 1st Mar 2010, (15 Replies)
Discussion started by: kandi.reddy
15 Replies

9. Shell Programming and Scripting

Set system date to some date (Sunos)

I am testing a script and need to change the system date to Nov 30 2009. I cannot seem to find a way to do this other than TZ command but it does not seem to work correctly. I tried TZ=GMT+168 date but it is returning todays date Mon Dec 7 19:48:11 GMT 2009 ...instead of Nov 30 2009 I... (4 Replies)
Discussion started by: hanton
4 Replies

10. Shell Programming and Scripting

Compare date from db2 table to yesterday's Unix system date

I am currently running the following Korn shell script which works fine: #!/usr/bin/ksh count=`db2 -x "select count(*) from schema.tablename"` echo "count" I would like to add a "where" clause to the 2nd line that would allow me to get a record count of all the records from schema.tablename... (9 Replies)
Discussion started by: sasaliasim
9 Replies
Login or Register to Ask a Question