Reusable librock_IOCaptureBegin - Redirect writes to a FILE * into a temporary file.

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NAME

librock_IOCaptureBegin - Redirect writes to a FILE * into a temporary file.
librock_IOCaptureEndstr - End redirection, and place all redirected data into an allocated string.

#License - #Source code - #Example Use -

SYNOPSIS

#include <librock/target/types.c>
#include <librock/file.h>

struct librock_IOCapture_s *
librock_IOCaptureBegin(
    librock_FILE *f
);

char *
librock_IOCaptureEndstr(
     struct librock_IOCapture_s *p,
     char **ppasz
);

DESCRIPTION

This function issues the fflush(), dup(), dup2() and tmpfile() calls to save the output written to a FILE *. calling librock_IOCaptureEndstr places the captured output into a string, and restores all file descriptors.

This function works under MSVC (WIN32) and Unix/Linux/BSD platforms.

Typical use is

    char *asz = 0;
    struct librock_IOCapture_s *pIOC = librock_IOCaptureBegin((librock_FILE *)stdout);
    printf("This is a test");
    librock_IOCaptureEndstr(pIOC,&asz);
    /* . . . */
    librock_astrfree(&asz);

USES

  malloc, free, dup, dup2, close, tmpfile, fclose, fileno
  rewind, librock_astrfree, librock_astrcat, librock_afgets

LICENSE

  Copyright 1998-2002 Forrest J. Cavalier III, http://www.mibsoftware.com
  Licensed under BSD-ish license, NO WARRANTY. Copies must retain this block.
  License text in <librock/license/librock.txt> librock_LIDESC_HC=12440211096131f5976d36be0cddca4cd9152e45

Source Code

./file/iocapt.c (implementation, plus source of this manual page)

Tests and Supported Platform Types

This is a representative sample. Librock code is highly portable. For a particular platform not reported here, request paid support

librock_IOCaptureBegin passed tests in tiocapt (Unix/Linux/BSD: 2002/08/08 sys=FreeBSD using gcc)
librock_IOCaptureBegin passed tests in tiocapt (WIN32: 2002/08/08 sys=NT 4.0 using MSVC)
librock_IOCaptureEndstr passed tests in tiocapt (Unix/Linux/BSD: 2002/08/08 sys=FreeBSD using gcc)
librock_IOCaptureEndstr passed tests in tiocapt (WIN32: 2002/08/08 sys=NT 4.0 using MSVC)

This software is part of Librock

Rapid reuse, without rework.

Source code which is Open-source, Free (Libre) and free (no cost)
Namespace limited. All compile-time macros and names visible at link time are prefixed by "librock_". Integrate into your project and expect no name collisions.
Stable API means new functions get new names so that there is no risk that updating a source file will break existing applications.
Highly portable, cross-platform, and multithread compatible. Works with many machines, compilers, and operating systems (gcc/MSVC/Windows/Linux/BSD).

Details

Verbatim copying and distribution of this generated page is permitted in any medium provided that no changes are made.
(The source of this manual page may be covered by a more permissive license which allows modifications.)

Want to help? We welcome comments, patches. -- Need help? Request paid support.