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does the file exit?

hey ****s,
How do i check if a file exits before doing something with it ?(C language)
0
achille67
Asked:
achille67
1 Solution
 
hongjunCommented:
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
 
achille67Author Commented:
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
 
manish_regmiCommented:
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

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