strdup.c File Reference

#include <stddef.h>
#include <stdlib.h>
#include <string.h>

Include dependency graph for strdup.c:

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Functions
char *	strdup (const char *str)
	Duplicate the passed in string str. More...

Function Documentation

strdup()

char* strdup

(

const char *

str

)

Duplicate the passed in string str.

Returns a pointer to a new string which is a duplicate of the string str. Memory for the new string is obtained with malloc(3), and can be freed with free(3).

Parameters

str	a pointer to a string to duplicate

Returns

a pointer to the duplicated string on success. NULL if insufficient memory was available, with errno set to indicate cause of error.

Definition at line 42 of file strdup.c.

{
    char* copy = NULL;

    if(str)
    {
        size_t len = strlen(str) + 1;

        if((copy = malloc(len)) == NULL)
        {
            return (NULL);
        }

        memcpy(copy, str, len);
    }

    return (copy);
}

References malloc(), memcpy(), NULL, and strlen().