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strndupa (3)
  • strndupa (3) ( Русские man: Библиотечные вызовы )
  • >> strndupa (3) ( Linux man: Библиотечные вызовы )
  •  

    NAME

    strdup, strndup, strdupa, strndupa - duplicate a string
     
    

    SYNOPSIS

    #include <string.h>
    
    char *strdup(const char *s);
    
    char *strndup(const char *s, size_t n);
    
    char *strdupa(const char *s);
    char *strndupa(const char *s, size_t n);

    Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

    strdup(): _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE >= 500
    strndup(), strdupa(), strndupa(): _GNU_SOURCE  

    DESCRIPTION

    The strdup() function returns a pointer to a new string which is a duplicate of the string s. Memory for the new string is obtained with malloc(3), and can be freed with free(3).

    The strndup() function is similar, but only copies at most n characters. If s is longer than n, only n characters are copied, and a terminating null byte (aq\0aq) is added.

    strdupa() and strndupa() are similar, but use alloca(3) to allocate the buffer. They are only available when using the GNU GCC suite, and suffer from the same limitations described in alloca(3).  

    RETURN VALUE

    The strdup() function returns a pointer to the duplicated string, or NULL if insufficient memory was available.  

    ERRORS

    ENOMEM
    Insufficient memory available to allocate duplicate string.
     

    CONFORMING TO

    strdup() conforms to SVr4, 4.3BSD, POSIX.1-2001. strndup(), strdupa(), and strndupa() are GNU extensions.  

    SEE ALSO

    alloca(3), calloc(3), free(3), malloc(3), realloc(3), wcsdup(3)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    CONFORMING TO
    SEE ALSO
    COLOPHON


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