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ASPRINTF(3)		   Linux Programmer's Manual		   ASPRINTF(3)

NAME
       asprintf, vasprintf - print to allocated	string

SYNOPSIS
       #define _GNU_SOURCE	   /* See feature_test_macros(7) */
       #include	<stdio.h>

       int asprintf(char **strp, const char *fmt, ...);

       int vasprintf(char **strp, const	char *fmt, va_list ap);

DESCRIPTION
       The  functions asprintf() and vasprintf() are analogs of	sprintf(3) and
       vsprintf(3), except that	they allocate a	string large  enough  to  hold
       the  output  including  the  terminating	null byte ('\0'), and return a
       pointer to it via the first argument.  This pointer should be passed to
       free(3) to release the allocated	storage	when it	is no longer needed.

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

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

SEE ALSO
       free(3),	malloc(3), printf(3)

COLOPHON
       This page is part of release 3.53 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/.

GNU				  2013-06-21			   ASPRINTF(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | SEE ALSO | COLOPHON

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=vasprintf&sektion=3&manpath=CentOS+7.1>

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