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5a053ffe80
This commit renames lib/setup.h to lib/curl_setup.h and
renames lib/setup_once.h to lib/curl_setup_once.h.
Removes the need and usage of a header inclusion guard foreign
to libcurl. [1]
Removes the need and presence of an alarming notice we carried
in old setup_once.h [2]
----------------------------------------
1 - lib/setup_once.h used __SETUP_ONCE_H macro as header inclusion guard
up to commit ec691ca3 which changed this to HEADER_CURL_SETUP_ONCE_H,
this single inclusion guard is enough to ensure that inclusion of
lib/setup_once.h done from lib/setup.h is only done once.
Additionally lib/setup.h has always used __SETUP_ONCE_H macro to
protect inclusion of setup_once.h even after commit ec691ca3, this
was to avoid a circular header inclusion triggered when building a
c-ares enabled version with c-ares sources available which also has
a setup_once.h header. Commit ec691ca3 exposes the real nature of
__SETUP_ONCE_H usage in lib/setup.h, it is a header inclusion guard
foreign to libcurl belonging to c-ares's setup_once.h
The renaming this commit does, fixes the circular header inclusion,
and as such removes the need and usage of a header inclusion guard
foreign to libcurl. Macro __SETUP_ONCE_H no longer used in libcurl.
2 - Due to the circular interdependency of old lib/setup_once.h and the
c-ares setup_once.h header, old file lib/setup_once.h has carried
back from 2006 up to now days an alarming and prominent notice about
the need of keeping libcurl's and c-ares's setup_once.h in sync.
Given that this commit fixes the circular interdependency, the need
and presence of mentioned notice is removed.
All mentioned interdependencies come back from now old days when
the c-ares project lived inside a curl subdirectory. This commit
removes last traces of such fact.
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include "curl_gethostname.h"
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/*
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* Curl_gethostname() is a wrapper around gethostname() which allows
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* overriding the host name that the function would normally return.
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* This capability is used by the test suite to verify exact matching
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* of NTLM authentication, which exercises libcurl's MD4 and DES code
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* as well as by the SMTP module when a hostname is not provided.
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*
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* For libcurl debug enabled builds host name overriding takes place
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* when environment variable CURL_GETHOSTNAME is set, using the value
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* held by the variable to override returned host name.
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*
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* Note: The function always returns the un-qualified hostname rather
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* than being provider dependent.
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*
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* For libcurl shared library release builds the test suite preloads
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* another shared library named libhostname using the LD_PRELOAD
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* mechanism which intercepts, and might override, the gethostname()
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* function call. In this case a given platform must support the
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* LD_PRELOAD mechanism and additionally have environment variable
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* CURL_GETHOSTNAME set in order to override the returned host name.
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*
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* For libcurl static library release builds no overriding takes place.
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*/
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int Curl_gethostname(char *name, GETHOSTNAME_TYPE_ARG2 namelen) {
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#ifndef HAVE_GETHOSTNAME
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/* Allow compilation and return failure when unavailable */
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(void) name;
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(void) namelen;
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return -1;
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#else
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int err;
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char* dot;
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#ifdef DEBUGBUILD
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/* Override host name when environment variable CURL_GETHOSTNAME is set */
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const char *force_hostname = getenv("CURL_GETHOSTNAME");
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if(force_hostname) {
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strncpy(name, force_hostname, namelen);
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err = 0;
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}
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else {
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name[0] = '\0';
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err = gethostname(name, namelen);
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}
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#else /* DEBUGBUILD */
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/* The call to system's gethostname() might get intercepted by the
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libhostname library when libcurl is built as a non-debug shared
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library when running the test suite. */
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name[0] = '\0';
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err = gethostname(name, namelen);
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#endif
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name[namelen - 1] = '\0';
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if(err)
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return err;
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/* Truncate domain, leave only machine name */
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dot = strchr(name, '.');
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if(dot)
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*dot = '\0';
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return 0;
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#endif
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}
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