— save a copy of a
char *s, size_t
function allocates sufficient memory for a copy of the string
s, does the copy, and returns a pointer to it. The
pointer may subsequently be used as an argument to the function
function behaves similarly to
strdup but only copies
up to maxlen characters from s.
The resulting string is always NUL-terminated.
If the memory allocation fails,
The following will point p to an allocated area of memory containing the NUL-terminated string "foobar":
char *p; p = strdup("foobar"); if (p == NULL) err(1, NULL);
strndup() functions may fail and set the external
variable errno for any of the errors specified for the
library function malloc(3).
free(3), malloc(3), strcpy(3), strlcpy(3), strlen(3), wcsdup(3)
strndup() functions conform to IEEE
Std 1003.1-2008 (“POSIX.1”).
strdup() macro was first used in the
dbx. It was
rewritten as a C function for the 4.3BSD
first appeared in the C library of 4.3BSD-Reno. The
strndup() function appeared in glibc 2.0, was
reimplemented for NetBSD 4.0, and ported to