mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-11-21 03:14:19 +08:00
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* Copyright 2016 The NASM Authors - All Rights Reserved
|
|
* See the file AUTHORS included with the NASM distribution for
|
|
* the specific copyright holders.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* realpath.c As system-independent as possible implementation of realpath()
|
|
*/
|
|
|
|
#include "compiler.h"
|
|
|
|
#include <errno.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_PARAM_H
|
|
# include <sys/param.h>
|
|
#endif
|
|
|
|
#include "nasmlib.h"
|
|
|
|
#ifdef HAVE_CANONICALIZE_FILE_NAME
|
|
|
|
/*
|
|
* GNU-specific, but avoids the realpath(..., NULL)
|
|
* portability problem if it exists.
|
|
*/
|
|
char *nasm_realpath(const char *rel_path)
|
|
{
|
|
char *rp = canonicalize_file_name(rel_path);
|
|
return rp ? rp : nasm_strdup(rel_path);
|
|
}
|
|
|
|
#elif defined(HAVE_REALPATH)
|
|
|
|
/*
|
|
* POSIX.1-2008 defines realpath(..., NULL); POSIX.1-2001 doesn't guarantee
|
|
* that a NULL second argument is supported.
|
|
*/
|
|
|
|
char *nasm_realpath(const char *rel_path)
|
|
{
|
|
char *rp;
|
|
|
|
rp = realpath(rel_path, NULL);
|
|
|
|
/* Not all implementations of realpath() support a NULL second argument */
|
|
if (!rp && errno == EINVAL) {
|
|
long path_max = -1;
|
|
char *rp;
|
|
|
|
#if defined(HAVE_PATHCONF) && defined(_PC_PATH_MAX)
|
|
path_max = pathconf(rel_path, _PC_PATH_MAX); /* POSIX */
|
|
#endif
|
|
|
|
if (path_max < 0) {
|
|
#ifdef PATH_MAX
|
|
path_max = PATH_MAX; /* SUSv2 */
|
|
#elif defined(MAXPATHLEN)
|
|
path_max = MAXPATHLEN; /* Solaris */
|
|
#else
|
|
path_max = 65536; /* Crazily high, we hope */
|
|
#endif
|
|
}
|
|
|
|
rp = nasm_malloc(path_max);
|
|
|
|
if (!realpath(rel_path, rp)) {
|
|
nasm_free(rp);
|
|
rp = NULL;
|
|
} else {
|
|
/* On some systems, pathconf() can return a very large value */
|
|
|
|
rp[path_max - 1] = '\0'; /* Just in case overrun is possible */
|
|
rp = nasm_realloc(rp, strlen(rp) + 1);
|
|
}
|
|
}
|
|
|
|
return rp ? rp : nasm_strdup(rel_path);
|
|
}
|
|
|
|
#elif defined(HAVE__FULLPATH)
|
|
|
|
/*
|
|
* win32/win64 API
|
|
*/
|
|
|
|
char *nasm_realpath(const char *rel_path)
|
|
{
|
|
char *rp = _fullpath(NULL, rel_path, 0);
|
|
return rp ? rp : nasm_strdup(rel_path);
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* There is nothing we know how to do here, so hope it just works anyway.
|
|
*/
|
|
|
|
char *nasm_realpath(const char *rel_path)
|
|
{
|
|
return nasm_strdup(rel_path);
|
|
}
|
|
|
|
#endif
|