Duplicates the specified string.

    Format

      #include  <string.h>

      char *strdup  (const char *s1);

1 - Function Variants

    The strdup function has variants named _strdup32 and _strdup64
    for use with 32-bit and 64-bit pointer sizes, respectively.

2 - Argument

 s1

    The string to be duplicated.

3 - Description

    The strdup function returns a pointer to a string that is an
    exact duplicate of the string pointed to by s1. The malloc
    function is used to allocate space for the new string. The strdup
    function is provided for compatibility with existing systems.

4 - Return Values

    x                  A pointer to the resulting string.
    NULL               Indicates an error.