Страницы справочника OS X

Эта страница руководства является частью версии 5.0 Инструментов XCode

Читать страницы руководства

STRDUP(3)                BSD Library Functions Manual                STRDUP(3)

NAME
     strdup, strndup -- save a copy of a string

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <string.h>

     char *
     strdup(const char *s1);

     char *
     strndup(const char *s1, size_t n);

DESCRIPTION
     The strdup() function allocates sufficient memory for a copy of the string s1, does the copy, and
     returns a pointer to it.  The pointer may subsequently be used as an argument to the function free(3).

     If insufficient memory is available, NULL is returned and errno is set to ENOMEM.

     The strndup() function copies at most n characters from the string s1 always NUL terminating the copied
     string.

SEE ALSO
     free(3), malloc(3)

HISTORY
     The strdup() function first appeared in 4.4BSD.  The strndup() function was added in FreeBSD 7.2.

BSD                            December 5, 2008                            BSD