diff --git a/compat/realpath.c b/compat/realpath.c new file mode 100644 index 0000000000000000000000000000000000000000..937b9f5c301c96efa2079f6e841961ba5cd10468 --- /dev/null +++ b/compat/realpath.c @@ -0,0 +1,74 @@ +/***************************************************************************** + * realpath.c: POSIX realpath replacement + ***************************************************************************** + * Copyright © 2016 VLC authors and VideoLAN + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. + *****************************************************************************/ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdlib.h> +#include <errno.h> +#ifdef _WIN32 +#include <windows.h> +#endif + +char *realpath(const char * restrict relpath, char * restrict resolved_path) +{ + if (relpath == NULL) + { + errno = EINVAL; + return NULL; + } + +#ifdef _WIN32 + int len = MultiByteToWideChar( CP_UTF8, 0, relpath, -1, NULL, 0 ); + if (len == 0) + return NULL; + + wchar_t *wrelpath = malloc(len * sizeof (wchar_t)); + if (wrelpath == NULL) + return NULL; + + MultiByteToWideChar( CP_UTF8, 0, relpath, -1, wrelpath, len ); + + wchar_t *wfullpath = _wfullpath( NULL, wrelpath, _MAX_PATH ); + free(wrelpath); + if (wfullpath != NULL) + { + size_t len = WideCharToMultiByte( CP_UTF8, 0, wfullpath, -1, NULL, 0, NULL, NULL ); + if (len != 0) + { + if (resolved_path != NULL) + len = len >= _MAX_PATH ? _MAX_PATH : len; + else + resolved_path = (char *)malloc(len); + + if (resolved_path != NULL) + WideCharToMultiByte( CP_UTF8, 0, wfullpath, -1, resolved_path, len, NULL, NULL ); + free(wfullpath); + return resolved_path; + } + free(wfullpath); + } +#else + (void)resolved_path; +#endif + errno = EACCES; + return NULL; +} diff --git a/configure.ac b/configure.ac index 87be33d365258c95adb7bd64e56ea2e4edb73ff1..833a76b40fc5cb1bc3225082762cd37f88d94587 100644 --- a/configure.ac +++ b/configure.ac @@ -605,6 +605,8 @@ AC_CHECK_FUNC(fdatasync,, [AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.]) ]) +VLC_REPLACE_DECL([realpath], [#include <stdlib.h>]) + dnl mingw64 implements those as static inline, not functions with C linkage VLC_REPLACE_DECL([asprintf], [#include <stdio.h>]) VLC_REPLACE_DECL([vasprintf], [#include <stdio.h>]) diff --git a/include/vlc_fixups.h b/include/vlc_fixups.h index 7a76ef45a51fc964fb086466dcc85a76e956c850..690daaeace257dab2fdce5403d59975ea8a2ad3f 100644 --- a/include/vlc_fixups.h +++ b/include/vlc_fixups.h @@ -481,6 +481,10 @@ void freeaddrinfo (struct addrinfo *res); #define nanf(tagp) NAN #endif +#ifndef HAVE_REALPATH +char *realpath(const char * restrict pathname, char * restrict resolved_path); +#endif + #ifdef _WIN32 FILE *vlc_win32_tmpfile(void); #endif