STRDUP(3) OpenBSD Programmer's Manual STRDUP(3)NAME
strdup, strndup - save a copy of a string
SYNOPSIS
#include <string.h>
char *
strdup(const char *s);
char *
strndup(const char *s, size_t maxlen);
DESCRIPTION
The strdup() 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 free(3).
The strndup() function behaves similarly to strdup but only copies up to
maxlen characters from s. The resulting string is always NUL-terminated.
If insufficient memory is available, NULL is returned.
EXAMPLES
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) {
fprintf(stderr, "Out of memory.\n");
exit(1);
}
ERRORS
The strdup() function may fail and set the external variable errno for
any of the errors specified for the library function malloc(3).
SEE ALSOfree(3), malloc(3), strcpy(3), strlcpy(3), strlen(3)STANDARDS
The strdup() and strndup() functions conform to IEEE Std 1003.1-2008
(``POSIX'').
HISTORY
The strdup() function first appeared in 4.4BSD. The strndup() function
first appeared in OpenBSD 4.8.
OpenBSD 4.9 May 19, 2010 OpenBSD 4.9
