| /* ----------------------------------------------------------------------- * |
| * |
| * 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 <stdlib.h> |
| #include <errno.h> |
| #include <limits.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 implemetations 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 |