How to write a code in C to search a file

Applications Programming
1

Dear All,
Plz give me some code that how can I search a file through a C program file may be in Present Directory or in its Sub-Directories and it should support Linux Platform. :mad:

2

opensolaris - link

3

#include <dirent.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[])
{
DIR *dp;
struct dirent *dirp;

if \(argc != 3\)
   \{
   printf\("usage: ./Exe_Name  dir_name   file_name"\);
   exit\(0\);
   \}

if \(\(dp = opendir\(argv[1]\)\) == NULL\)
   \{
   printf\("can't open %s", argv[1]\);
   exit\(1\);
   \}
while \(\(dirp = readdir\(dp\)\) != NULL\)
   \{
    if\(!strcmp\(dirp-&gt;d_name,argv[2]\)\)
   printf\("%s\\n", dirp-&gt;d_name\);
   \}
closedir\(dp\);
exit\(0\);

}

4

Also consider ntfw() which is a very efficient way to do this.

See man nftw.

Or use popen to call find in a child process:

find /path/to/files -type f -exec grep -l 'searchstring' {} \;

See man popen

5

advanced programming inthe UNIX Environnment

6

Hi Manoj .. Thanks for your code .. It worked nicely for me ....

7

The first posted solution only works for the first level of sub-directories, not subsequent levels. To make it work recursively, you should use mcnamara's suggestion.