8960e1bc83
"compiler.h" already includes a bunch of common include files. There is absolutely no reason to duplicate them in individual files, and in fact it robs us of central control of how these files are used. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 2016 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* realpath.c As system-independent as possible implementation of realpath()
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*/
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#include "compiler.h"
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#include "nasmlib.h"
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#ifdef HAVE_CANONICALIZE_FILE_NAME
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/*
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* GNU-specific, but avoids the realpath(..., NULL)
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* portability problem if it exists.
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*/
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char *nasm_realpath(const char *rel_path)
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{
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char *rp = canonicalize_file_name(rel_path);
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return rp ? rp : nasm_strdup(rel_path);
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}
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#elif defined(HAVE_REALPATH)
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/*
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* POSIX.1-2008 defines realpath(..., NULL); POSIX.1-2001 doesn't guarantee
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* that a NULL second argument is supported.
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*/
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char *nasm_realpath(const char *rel_path)
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{
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char *rp;
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rp = realpath(rel_path, NULL);
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/* Not all implemetations of realpath() support a NULL second argument */
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if (!rp && errno == EINVAL) {
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long path_max = -1;
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char *rp;
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#if defined(HAVE_PATHCONF) && defined(_PC_PATH_MAX)
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path_max = pathconf(rel_path, _PC_PATH_MAX); /* POSIX */
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#endif
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if (path_max < 0) {
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#ifdef PATH_MAX
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path_max = PATH_MAX; /* SUSv2 */
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#elif defined(MAXPATHLEN)
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path_max = MAXPATHLEN; /* Solaris */
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#else
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path_max = 65536; /* Crazily high, we hope */
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#endif
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}
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rp = nasm_malloc(path_max);
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if (!realpath(rel_path, rp)) {
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nasm_free(rp);
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rp = NULL;
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} else {
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/* On some systems, pathconf() can return a very large value */
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rp[path_max - 1] = '\0'; /* Just in case overrun is possible */
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rp = nasm_realloc(rp, strlen(rp) + 1);
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}
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}
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return rp ? rp : nasm_strdup(rel_path);
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}
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#elif defined(HAVE__FULLPATH)
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/*
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* win32/win64 API
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*/
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char *nasm_realpath(const char *rel_path)
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{
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char *rp = _fullpath(NULL, rel_path, 0);
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return rp ? rp : nasm_strdup(rel_path);
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}
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#else
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/*
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* There is nothing we know how to do here, so hope it just works anyway.
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*/
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char *nasm_realpath(const char *rel_path)
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{
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return nasm_strdup(rel_path);
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}
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#endif
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