SYNOPSIS<\/a>
DESCRIPTION<\/a>
RETURN VALUE<\/a>
ATTRIBUTES<\/a>
CONFORMING TO<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n
\n
NAME <\/a> <\/h2>\nasprintf, vasprintf \u2212 print to allocated string<\/p>\n
SYNOPSIS <\/a> <\/h2>\n#define _GNU_SOURCE<\/b> \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var See feature_test_macros(7) bodies\/ usr\/
#include <\/b><\/p>\nint asprintf(char **<\/b>strp<\/i>, const char *<\/b>fmt<\/i>, …);<\/b><\/p>\n
int vasprintf(char **<\/b>strp<\/i>, const char *<\/b>fmt<\/i>, va_list<\/b> ap<\/i>);<\/b><\/p>\nDESCRIPTION <\/a> <\/h2>\nThe functions asprintf<\/b>() and vasprintf<\/b>() are analogs of sprintf<\/b>(3) and vsprintf<\/b>(3), except that they allocate a string large enough to hold the output including the terminating null byte (‘\u0000’), and return a pointer to it via the first argument. This pointer should be passed to free<\/b>(3) to release the allocated storage when it is no longer needed.<\/p>\nRETURN VALUE <\/a> <\/h2>\nWhen successful, these functions return the number of bytes printed, just like sprintf<\/b>(3). If memory allocation wasn\u2019t possible, or some other error occurs, these functions will return \u22121, and the contents of strp<\/i> are undefined.<\/p>\nATTRIBUTES <\/a> <\/h2>\nFor an explanation of the terms used in this section, see attributes<\/b>(7).<\/p>\n\n\n<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n<\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n<\/table>\n![\"Image](\"grohtml-1572041.png\")
<\/p>\n
CONFORMING TO <\/a> <\/h2>\nThese functions are GNU extensions, not in C or POSIX. They are also available under *BSD. The FreeBSD implementation sets strp<\/i> to NULL on error.<\/p>\nSEE ALSO <\/a> <\/h2>\n
#define _GNU_SOURCE<\/b> \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var See feature_test_macros(7) bodies\/ usr\/ int asprintf(char **<\/b>strp<\/i>, const char *<\/b>fmt<\/i>, …);<\/b><\/p>\n int vasprintf(char **<\/b>strp<\/i>, const char *<\/b>fmt<\/i>, va_list<\/b> ap<\/i>);<\/b><\/p>\n The functions asprintf<\/b>() and vasprintf<\/b>() are analogs of sprintf<\/b>(3) and vsprintf<\/b>(3), except that they allocate a string large enough to hold the output including the terminating null byte (‘\u0000’), and return a pointer to it via the first argument. This pointer should be passed to free<\/b>(3) to release the allocated storage when it is no longer needed.<\/p>\n When successful, these functions return the number of bytes printed, just like sprintf<\/b>(3). If memory allocation wasn\u2019t possible, or some other error occurs, these functions will return \u22121, and the contents of strp<\/i> are undefined.<\/p>\n For an explanation of the terms used in this section, see attributes<\/b>(7).<\/p>\n These functions are GNU extensions, not in C or POSIX. They are also available under *BSD. The FreeBSD implementation sets strp<\/i> to NULL on error.<\/p>\n
#include DESCRIPTION <\/a> <\/h2>\n
RETURN VALUE <\/a> <\/h2>\n
ATTRIBUTES <\/a> <\/h2>\n
\n
\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n \n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n <\/td>\n<\/tr>\n<\/table>\n <\/p>\nCONFORMING TO <\/a> <\/h2>\n
SEE ALSO <\/a> <\/h2>\n