how to display specific file in a folder using c program in ubuntu?

[mybm1]

#include // for scandir
#include // for alphasort and structure dirent
#include // for MAXPATHLEN and getwd
#include #define FALSE 0
#define TRUE !FALSE

extern int alphasort();// extern extend the visiblity of the function alphasort
//alphasort used as the comparison function for the scandir() line no 24 function to sort the directory

char pathname[MAXPATHLEN];

main() { int count,i;
struct direct **files;//pointer to a pointer ,which point to the object call files here
int file_select();

			if (getwd(pathname) == NULL ) // return absolute file name of current directory
					{ printf("Error getting path\\n");
							exit(0);
					}
			printf("Current Working Directory = %s\\n",pathname);
			count =
			  scandir(pathname, &files, file\_select, alphasort);//scandir returns the current directory (.) and the 									directory above this (..) as well as all files so we need to check

			/\* If no files found, make a non-selectable menu item \*/
			if 		(count <= 0)
					{		 printf("No files in this directory\\n");
							exit(0);
					}
			printf("Number of files = %d\\n",count);
			for (i=1;id\_name);
			printf("\\n"); /\* flush buffer \*/
	}

int file_select(struct direct *entry)
{ char *ptr;
char *rindex(char *s, char c);
if ((strcmp(entry->d_name, ".") == 0) ||
(strcmp(entry->d_name, "..") == 0))
return (FALSE);
// checking of its extension
ptr = rindex(entry->d_name, '.');
if ((ptr != NULL) &&
((strcmp(ptr, ".c") == 0) ||
(strcmp(ptr, ".txt") == 0) ||
(strcmp(ptr, ".m") == 0) ))
return (TRUE);
else
return (FALSE);
}

debina

[mybm1]

the output is displaying file and folder from desktop but i want to display the file inside the folder with specific extension...

[Lost User]

You have not told us what path is returned from getwd so we cannot answer that. You should also read the notes at http://linux.about.com/library/cmd/blcmdl3_getwd.htm[^] on why this function is deprecated.

[mybm1]

I am not able to get you path means? but this program is displaying the file present in desktop..

[Lost User]

What is the full directory path that gets stored in pathname by the getwd function?

[mybm1]

/home/saikat/Desktop

[Lost User]

Well that seems clear. How exactly do you think that using that path for your scandir will return files from a different folder?

[mybm1]

Actually that was my problem of not working with different location ...that y I uploaded to find solution over here.. :(

[Lost User]

I don't see a problem; you get the path of the desktop and list the files in it. If you want to list the files of a different folder then get the correct path for the folder in question. And don't use getwd (or getcwd) unless you are certain that you are rooted in the correct directory to start with. Use a different method to select the folder you wish to list.

[mybm1]

thank you ...counted I will kip in mind...