1ASPRINTF(3)                Linux Programmer's Manual               ASPRINTF(3)
2
3
4

NAME

6       asprintf, vasprintf - print to allocated string
7

SYNOPSIS

9       #define _GNU_SOURCE
10       #include <stdio.h>
11
12       int asprintf(char **strp, const char *fmt, ...);
13
14       int vasprintf(char **strp, const char *fmt, va_list ap);
15

DESCRIPTION

17       The functions asprintf() and vasprintf() are analogues of sprintf() and
18       vsprintf(), except that they allocate a string large enough to hold the
19       output  including the terminating null byte, and return a pointer to it
20       via the first parameter.  This pointer should be passed to  free(3)  to
21       release the allocated storage when it is no longer needed.
22

RETURN VALUE

24       When  successful,  these  functions return the number of bytes printed,
25       just like sprintf(3).  If memory allocation wasn't  possible,  or  some
26       other error occurs, these functions will return -1, and the contents of
27       strp is undefined.
28

CONFORMING TO

30       These functions are GNU extensions, not in C or POSIX.  They  are  also
31       available  under *BSD.  The FreeBSD implementation sets strp to NULL on
32       error.
33

SEE ALSO

35       free(3), malloc(3), printf(3), feature_test_macros(7)
36
37
38
39GNU                               2001-12-18                       ASPRINTF(3)