Syntax

#include <string.h>
char *strdup(const char *string);

strdup reserves storage space for a copy of string by calling malloc. The string argument to this function is expected to contain a null character (\0) marking the end of the string. Remember to free the storage reserved with the call to strdup.

strdup returns a pointer to the storage space containing the copied string. If it cannot reserve storage strdup returns NULL.

This example uses strdup to duplicate a string and print the copy.

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

int main(void)
{
   char *string = "this is a copy";
   char *newstr;

   /* Make newstr point to a duplicate of string                              */

   if ((newstr = strdup(string)) != NULL)
      printf("The new string is: %s\n", newstr);
   return 0;

   /****************************************************************************
      The output should be:

      The new string is: this is a copy
   ****************************************************************************/
}

• strcpy
  
• strncpy
  
• wcscpy
  
• wcsncpy

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