avr-libc-1.7.1/libc/string/strdup.c

/* Copyright (c) 2008, Atmel Corporation
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/* $Id: strdup.c 1944 2009-04-01 23:12:20Z arcanum $ */

#include <stdlib.h>
#include <string.h>
#include "sectionname.h"

/** \file */
/** \ingroup avr_string
    \fn char *strdup(const char *s1)
    \brief Duplicate a string.

    The strdup() function allocates memory and copies into it the string
    addressed by s1, including the terminating null character.

    \warning The strdup() function calls malloc() to allocate the memory
    for the duplicated string! The user is responsible for freeing the
    memory by calling free(). 
    
    \returns The strdup() function returns a pointer to the resulting string
    dest. If malloc() cannot allocate enough storage for the string, strdup() 
    will return NULL.

    \warning Be sure to check the return value of the strdup() function to
    make sure that the function has succeeded in allocating the memory!
*/

ATTRIBUTE_CLIB_SECTION
char *
strdup(const char *s1)
{
    char *s2 = malloc(strlen(s1)+1);
    if (s2 != NULL)
    {
        strcpy(s2, s1);
    }
    return(s2);
}