[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

does the file exit?

Posted on 2004-04-04
3
Medium Priority
?
270 Views
Last Modified: 2010-04-21
hey ****s,
How do i check if a file exits before doing something with it ?(C language)
0
Comment
Question by:achille67
3 Comments
 
LVL 33

Expert Comment

by:hongjun
ID: 10754075
You can use stat() function to check file exist


#include <sys/stat.h>
#include <errno.h>
...

struct stat stat_p;
if (stat (filename, &stat_p) == -1)
{
   if (errno == ENOENT)
   {
      // file does not exist (or file name is emtpy)
     ... // do something
   }
}

Using stat() allows you to do some more testing on the file (e.g. find out if it's really a normal file and not a link or a directory, ...)



hongjun
0
 

Author Comment

by:achille67
ID: 10754375
i am partially agree on the answer: if the file does not exist, i would to create it using creat( ) but i am not sure how i should pass the pointer to it.
0
 
LVL 8

Accepted Solution

by:
manish_regmi earned 150 total points
ID: 10754525
hi,
you can use open with O_CREAT and O_EXCL.
This will create the file and if the file exists, it will return error.
open ("/xyz", O_CREAT | O_EXCL | O_RDWR);

regards manish

0

Featured Post

Learn to develop an Android App

Want to increase your earning potential in 2018? Pad your resume with app building experience. Learn how with this hands-on course.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The purpose of this article is to fix the unknown display problem in Linux Mint operating system. After installing the OS if you see Display monitor is not recognized then we can install "MESA" utilities to fix this problem or we can install additio…
The purpose of this article is to demonstrate how we can upgrade Python from version 2.7.6 to Python 2.7.10 on the Linux Mint operating system. I am using an Oracle Virtual Box where I have installed Linux Mint operating system version 17.2. Once yo…
How to fix display issue, screen flickering issue when I plug in power cord to the machine. Before I start explaining the solution lets check out once the issue how it looks like after I connect the power cord. most of you also have faced this…
There may be issues when you are trying to access Outlook or send & receive emails or due to Outlook crash which leads to corrupt or damaged PST file. To eliminate the corruption from your PST file, you need to repair the corrupt Outlook PST file. U…

612 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question