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how can we know whether a particular file is read or not using c programming.
for an example:
the file name = abcd.txt
the status of the file should be 0 if the person has not opened it and it should be changed to 1 after any one reads it
how can we do this
Straight way you can not check the file is read or not.
For specific number of days or epoch seconds you can checkHere I have written the program for checking file is read in last 2 days
12345678910111213141516171819202122232425262728293031<br />#include <br />#include <br />#include <br />#include<br />#include<br /><br />main()<br />{<br />struct stat but ;<br />// Here you need to give the file name with absolute path.<br />stat("/home/pavunkumar/secrect",&but );<br />// Here I have calculated the one day epoch time.<br />int limit = 24*60*60;<br />// Getting the last read time of the file.<br />int read = but.st_atime ;<br />int current ;<br />// Getting the current epoch time.<br />current=time ( NULL ) ;<br />// Check file is not open for 2 days.<br />if (((current-read)/limit) >= 2 )<br />{<br />printf ( "file is not read ");<br />}<br />else<br />{<br />printf ( "file is read " ) ;<br />}<br />}<br /><br />
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