How to find Directory in Linux using c? -


i'm making c program in linux user enter directory name found. following code have written not getting correct output. i'm searching through directories till found directory.
i'm beginner.

#include<unistd.h> #include<dirent.h> #include<stdio.h> #include<stdlib.h> #include<string.h> #include<sys/stat.h> #include<errno.h>  void finddir(char *dir, char *name) {     dir *dp;     struct dirent *entry;     struct stat statbuf;      if((dp = opendir(dir)) == null)     {         printf("\ncan not open directory: %s", name);         printf("\ndescription: %s", strerror(errno));         return;     }      chdir(dir);      while(( entry = readdir(dp)) != null)     {         lstat( entry->d_name, &statbuf);         if(s_isdir( statbuf.st_mode))         {             if( strcmp(name,entry->d_name) == 0)             {                 printf("dir found");                 return;             }             finddir(entry->d_name, name);         }     }     chdir("..");     closedir(dp); }  void main(int argc, char *argv[]) {     if( argc != 2 )     {         printf("error");     }     else     {         finddir("/home", argv[1]);     } }

please help!! follwing output while giving documents argument. program goes infinite , repeteadly following output. little of output.

can not open directory: documents
description: many open files
can not open directory: documents
description: many open files
can not open directory: documents
description: many open filesdir found

i took quick @ this. here advice.

  • when debugging, either single-step in debugger or @ least put print statements see happening. put in printf() in loop walks directories, , found right away trying visit .. directory, leaves /home , loops forever.

  • so, in loop, before else, test see if entry->d_name "." or "..", , if so, skip directory entry (you can use continue keyword).

  • make sure call closedir(dp); before function returns. example, when code prints message can not open directory:, function returns without closing directory. way, should print entry->d_name in error message, not name.

the error too many open files because loop following .. never stop, , finds plenty of directories cannot open, code not calling closedir() on error exit means more , more directories left open.

  • your program keep on going after finds target directory! print message keep on going. can modify function finddir() return code saying whether found target or not, , make program stop in case.

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