asprintf(3) — Справочная страница Linux

asprintf(3)             Library Functions Manual             asprintf(3)

НАЗВАНИЕ

       asprintf, vasprintf - print to allocated string

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

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

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

ОПИСАНИЕ

       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.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       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 are undefined.

АТРИБУТЫ

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────┬───────────────┬────────────────┐
       │ Interface                    │ Attribute     │ Value          │
       ├──────────────────────────────┼───────────────┼────────────────┤
       │ asprintf(), vasprintf()      │ Thread safety │ MT-Safe locale │
       └──────────────────────────────┴───────────────┴────────────────┘

ВЕРСИИ

       The FreeBSD implementation sets strp to NULL on error.

СТАНДАРТЫ

       GNU, BSD.

СМОТРИТЕ ТАКЖЕ

       free(3), malloc(3), printf(3)

КОЛОФОН

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-06-15                    asprintf(3)

Страницы, которые ссылаются на эту страницу: lttng_ust_tracef(3), lttng_ust_tracelog(3), printf(3), printf.h(3head)