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Diffstat (limited to 'Source/kwsys/SharedForward.h.in')
| -rw-r--r-- | Source/kwsys/SharedForward.h.in | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/Source/kwsys/SharedForward.h.in b/Source/kwsys/SharedForward.h.in new file mode 100644 index 0000000..f22fa58 --- /dev/null +++ b/Source/kwsys/SharedForward.h.in @@ -0,0 +1,938 @@ +/*============================================================================ + KWSys - Kitware System Library + Copyright 2000-2009 Kitware, Inc., Insight Software Consortium + + Distributed under the OSI-approved BSD License (the "License"); + see accompanying file Copyright.txt for details. + + This software is distributed WITHOUT ANY WARRANTY; without even the + implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the License for more information. +============================================================================*/ +#ifndef @KWSYS_NAMESPACE@_SharedForward_h +#define @KWSYS_NAMESPACE@_SharedForward_h + +/* + This header is used to create a forwarding executable sets up the + shared library search path and replaces itself with a real + executable. This is useful when creating installations on UNIX with + shared libraries that will run from any install directory. Typical + usage: + + #if defined(CMAKE_INTDIR) + # define CONFIG_DIR_PRE CMAKE_INTDIR "/" + # define CONFIG_DIR_POST "/" CMAKE_INTDIR + #else + # define CONFIG_DIR_PRE "" + # define CONFIG_DIR_POST "" + #endif + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_DIR_BUILD "/path/to/foo-build/bin" + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_BUILD "." CONFIG_DIR_POST + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_INSTALL "../lib/foo-1.2" + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_BUILD CONFIG_DIR_PRE "foo-real" + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_INSTALL "../lib/foo-1.2/foo-real" + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_COMMAND "--command" + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_PRINT "--print" + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_LDD "--ldd" + #if defined(CMAKE_INTDIR) + # define @KWSYS_NAMESPACE@_SHARED_FORWARD_CONFIG_NAME CMAKE_INTDIR + #endif + #include <@KWSYS_NAMESPACE@/SharedForward.h> + int main(int argc, char** argv) + { + return @KWSYS_NAMESPACE@_shared_forward_to_real(argc, argv); + } + + Specify search and executable paths relative to the forwarding + executable location or as full paths. Include no trailing slash. + In the case of a multi-configuration build, when CMAKE_INTDIR is + defined, the DIR_BUILD setting should point at the directory above + the executable (the one containing the per-configuration + subdirectory specified by CMAKE_INTDIR). Then PATH_BUILD entries + and EXE_BUILD should be specified relative to this location and use + CMAKE_INTDIR as necessary. In the above example imagine appending + the PATH_BUILD or EXE_BUILD setting to the DIR_BUILD setting. The + result should form a valid path with per-configuration subdirectory. + + Additional paths may be specified in the PATH_BUILD and PATH_INSTALL + variables by using comma-separated strings. For example: + + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_BUILD \ + "." CONFIG_DIR_POST, "/path/to/bar-build" CONFIG_DIR_POST + #define @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_INSTALL \ + "../lib/foo-1.2", "../lib/bar-4.5" + + See the comments below for specific explanations of each macro. +*/ + +/* Disable -Wcast-qual warnings since they are too hard to fix in a + cross-platform way. */ +#if defined(__clang__) && defined(__has_warning) +# if __has_warning("-Wcast-qual") +# pragma clang diagnostic push +# pragma clang diagnostic ignored "-Wcast-qual" +# endif +#endif + +/*--------------------------------------------------------------------------*/ + +/* Full path to the directory in which this executable is built. Do + not include a trailing slash. */ +#if !defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_DIR_BUILD) +# error "Must define @KWSYS_NAMESPACE@_SHARED_FORWARD_DIR_BUILD" +#endif +#if !defined(KWSYS_SHARED_FORWARD_DIR_BUILD) +# define KWSYS_SHARED_FORWARD_DIR_BUILD @KWSYS_NAMESPACE@_SHARED_FORWARD_DIR_BUILD +#endif + +/* Library search path for build tree. */ +#if !defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_BUILD) +# error "Must define @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_BUILD" +#endif +#if !defined(KWSYS_SHARED_FORWARD_PATH_BUILD) +# define KWSYS_SHARED_FORWARD_PATH_BUILD @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_BUILD +#endif + +/* Library search path for install tree. */ +#if !defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_INSTALL) +# error "Must define @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_INSTALL" +#endif +#if !defined(KWSYS_SHARED_FORWARD_PATH_INSTALL) +# define KWSYS_SHARED_FORWARD_PATH_INSTALL @KWSYS_NAMESPACE@_SHARED_FORWARD_PATH_INSTALL +#endif + +/* The real executable to which to forward in the build tree. */ +#if !defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_BUILD) +# error "Must define @KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_BUILD" +#endif +#if !defined(KWSYS_SHARED_FORWARD_EXE_BUILD) +# define KWSYS_SHARED_FORWARD_EXE_BUILD @KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_BUILD +#endif + +/* The real executable to which to forward in the install tree. */ +#if !defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_INSTALL) +# error "Must define @KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_INSTALL" +#endif +#if !defined(KWSYS_SHARED_FORWARD_EXE_INSTALL) +# define KWSYS_SHARED_FORWARD_EXE_INSTALL @KWSYS_NAMESPACE@_SHARED_FORWARD_EXE_INSTALL +#endif + +/* The configuration name with which this executable was built (Debug/Release). */ +#if defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_CONFIG_NAME) +# define KWSYS_SHARED_FORWARD_CONFIG_NAME @KWSYS_NAMESPACE@_SHARED_FORWARD_CONFIG_NAME +#else +# undef KWSYS_SHARED_FORWARD_CONFIG_NAME +#endif + +/* Create command line option to replace executable. */ +#if defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_COMMAND) +# if !defined(KWSYS_SHARED_FORWARD_OPTION_COMMAND) +# define KWSYS_SHARED_FORWARD_OPTION_COMMAND @KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_COMMAND +# endif +#else +# undef KWSYS_SHARED_FORWARD_OPTION_COMMAND +#endif + +/* Create command line option to print environment setting and exit. */ +#if defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_PRINT) +# if !defined(KWSYS_SHARED_FORWARD_OPTION_PRINT) +# define KWSYS_SHARED_FORWARD_OPTION_PRINT @KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_PRINT +# endif +#else +# undef KWSYS_SHARED_FORWARD_OPTION_PRINT +#endif + +/* Create command line option to run ldd or equivalent. */ +#if defined(@KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_LDD) +# if !defined(KWSYS_SHARED_FORWARD_OPTION_LDD) +# define KWSYS_SHARED_FORWARD_OPTION_LDD @KWSYS_NAMESPACE@_SHARED_FORWARD_OPTION_LDD +# endif +#else +# undef KWSYS_SHARED_FORWARD_OPTION_LDD +#endif + +/*--------------------------------------------------------------------------*/ +/* Include needed system headers. */ + +#include <stddef.h> /* size_t */ +#include <limits.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <stdio.h> + +#if defined(_WIN32) && !defined(__CYGWIN__) +# include <io.h> +# include <windows.h> +# include <process.h> +# define KWSYS_SHARED_FORWARD_ESCAPE_ARGV /* re-escape argv for execvp */ +#else +# include <unistd.h> +# include <sys/stat.h> +#endif + +/*--------------------------------------------------------------------------*/ +/* Configuration for this platform. */ + +/* The path separator for this platform. */ +#if defined(_WIN32) && !defined(__CYGWIN__) +# define KWSYS_SHARED_FORWARD_PATH_SEP ';' +# define KWSYS_SHARED_FORWARD_PATH_SLASH '\\' +#else +# define KWSYS_SHARED_FORWARD_PATH_SEP ':' +# define KWSYS_SHARED_FORWARD_PATH_SLASH '/' +#endif +static const char kwsys_shared_forward_path_sep[2] = {KWSYS_SHARED_FORWARD_PATH_SEP, 0}; +static const char kwsys_shared_forward_path_slash[2] = {KWSYS_SHARED_FORWARD_PATH_SLASH, 0}; + +/* The maximum length of a file name. */ +#if defined(PATH_MAX) +# define KWSYS_SHARED_FORWARD_MAXPATH PATH_MAX +#elif defined(MAXPATHLEN) +# define KWSYS_SHARED_FORWARD_MAXPATH MAXPATHLEN +#else +# define KWSYS_SHARED_FORWARD_MAXPATH 16384 +#endif + +/* Select the environment variable holding the shared library runtime + search path for this platform and build configuration. Also select + ldd command equivalent. */ + +/* Linux */ +#if defined(__linux) +# define KWSYS_SHARED_FORWARD_LDD "ldd" +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH" + +/* FreeBSD */ +#elif defined(__FreeBSD__) +# define KWSYS_SHARED_FORWARD_LDD "ldd" +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH" + +/* OpenBSD */ +#elif defined(__OpenBSD__) +# define KWSYS_SHARED_FORWARD_LDD "ldd" +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH" + +/* OSX */ +#elif defined(__APPLE__) +# define KWSYS_SHARED_FORWARD_LDD "otool", "-L" +# define KWSYS_SHARED_FORWARD_LDD_N 2 +# define KWSYS_SHARED_FORWARD_LDPATH "DYLD_LIBRARY_PATH" + +/* AIX */ +#elif defined(_AIX) +# define KWSYS_SHARED_FORWARD_LDD "dump", "-H" +# define KWSYS_SHARED_FORWARD_LDD_N 2 +# define KWSYS_SHARED_FORWARD_LDPATH "LIBPATH" + +/* SUN */ +#elif defined(__sun) +# define KWSYS_SHARED_FORWARD_LDD "ldd" +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# include <sys/isa_defs.h> +# if defined(_ILP32) +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH" +# elif defined(_LP64) +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH_64" +# endif + +/* HP-UX */ +#elif defined(__hpux) +# define KWSYS_SHARED_FORWARD_LDD "chatr" +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# if defined(__LP64__) +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH" +# else +# define KWSYS_SHARED_FORWARD_LDPATH "SHLIB_PATH" +# endif + +/* SGI MIPS */ +#elif defined(__sgi) && defined(_MIPS_SIM) +# define KWSYS_SHARED_FORWARD_LDD "ldd" +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# if _MIPS_SIM == _ABIO32 +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH" +# elif _MIPS_SIM == _ABIN32 +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARYN32_PATH" +# elif _MIPS_SIM == _ABI64 +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY64_PATH" +# endif + +/* Cygwin */ +#elif defined(__CYGWIN__) +# define KWSYS_SHARED_FORWARD_LDD "cygcheck" /* TODO: cygwin 1.7 has ldd */ +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# define KWSYS_SHARED_FORWARD_LDPATH "PATH" + +/* Windows */ +#elif defined(_WIN32) +# define KWSYS_SHARED_FORWARD_LDPATH "PATH" + +/* Guess on this unknown system. */ +#else +# define KWSYS_SHARED_FORWARD_LDD "ldd" +# define KWSYS_SHARED_FORWARD_LDD_N 1 +# define KWSYS_SHARED_FORWARD_LDPATH "LD_LIBRARY_PATH" +#endif + +#ifdef KWSYS_SHARED_FORWARD_ESCAPE_ARGV +/*--------------------------------------------------------------------------*/ +typedef struct kwsys_sf_arg_info_s +{ + const char* arg; + int size; + int quote; +} kwsys_sf_arg_info; + +/*--------------------------------------------------------------------------*/ +static kwsys_sf_arg_info kwsys_sf_get_arg_info(const char* in) +{ + /* Initialize information. */ + kwsys_sf_arg_info info; + + /* String iterator. */ + const char* c; + + /* Keep track of how many backslashes have been encountered in a row. */ + int windows_backslashes = 0; + + /* Start with the length of the original argument, plus one for + either a terminating null or a separating space. */ + info.arg = in; + info.size = (int)strlen(in) + 1; + info.quote = 0; + + /* Scan the string for characters that require escaping or quoting. */ + for(c=in; *c; ++c) + { + /* Check whether this character needs quotes. */ + if(strchr(" \t?'#&<>|^", *c)) + { + info.quote = 1; + } + + /* On Windows only backslashes and double-quotes need escaping. */ + if(*c == '\\') + { + /* Found a backslash. It may need to be escaped later. */ + ++windows_backslashes; + } + else if(*c == '"') + { + /* Found a double-quote. We need to escape it and all + immediately preceding backslashes. */ + info.size += windows_backslashes + 1; + windows_backslashes = 0; + } + else + { + /* Found another character. This eliminates the possibility + that any immediately preceding backslashes will be + escaped. */ + windows_backslashes = 0; + } + } + + /* Check whether the argument needs surrounding quotes. */ + if(info.quote) + { + /* Surrounding quotes are needed. Allocate space for them. */ + info.size += 2; + + /* We must escape all ending backslashes when quoting on windows. */ + info.size += windows_backslashes; + } + + return info; +} + +/*--------------------------------------------------------------------------*/ +static char* kwsys_sf_get_arg(kwsys_sf_arg_info info, char* out) +{ + /* String iterator. */ + const char* c; + + /* Keep track of how many backslashes have been encountered in a row. */ + int windows_backslashes = 0; + + /* Whether the argument must be quoted. */ + if(info.quote) + { + /* Add the opening quote for this argument. */ + *out++ = '"'; + } + + /* Scan the string for characters that require escaping or quoting. */ + for(c=info.arg; *c; ++c) + { + /* On Windows only backslashes and double-quotes need escaping. */ + if(*c == '\\') + { + /* Found a backslash. It may need to be escaped later. */ + ++windows_backslashes; + } + else if(*c == '"') + { + /* Found a double-quote. Escape all immediately preceding + backslashes. */ + while(windows_backslashes > 0) + { + --windows_backslashes; + *out++ = '\\'; + } + + /* Add the backslash to escape the double-quote. */ + *out++ = '\\'; + } + else + { + /* We encountered a normal character. This eliminates any + escaping needed for preceding backslashes. */ + windows_backslashes = 0; + } + + /* Store this character. */ + *out++ = *c; + } + + if(info.quote) + { + /* Add enough backslashes to escape any trailing ones. */ + while(windows_backslashes > 0) + { + --windows_backslashes; + *out++ = '\\'; + } + + /* Add the closing quote for this argument. */ + *out++ = '"'; + } + + /* Store a terminating null without incrementing. */ + *out = 0; + + return out; +} +#endif + +/*--------------------------------------------------------------------------*/ +/* Function to convert a logical or relative path to a physical full path. */ +static int kwsys_shared_forward_realpath(const char* in_path, char* out_path) +{ +#if defined(_WIN32) && !defined(__CYGWIN__) + /* Implementation for Windows. */ + DWORD n = GetFullPathNameA(in_path, KWSYS_SHARED_FORWARD_MAXPATH, + out_path, 0); + return n > 0 && n <= KWSYS_SHARED_FORWARD_MAXPATH; +#else + /* Implementation for UNIX. */ + return realpath(in_path, out_path) != 0; +#endif +} + +/*--------------------------------------------------------------------------*/ +static int kwsys_shared_forward_samepath(const char* file1, const char* file2) +{ +#if defined(_WIN32) + int result = 0; + HANDLE h1 = CreateFileA(file1, GENERIC_READ, FILE_SHARE_READ, NULL, + OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); + HANDLE h2 = CreateFileA(file2, GENERIC_READ, FILE_SHARE_READ, NULL, + OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); + if(h1 != INVALID_HANDLE_VALUE && h2 != INVALID_HANDLE_VALUE) + { + BY_HANDLE_FILE_INFORMATION fi1; + BY_HANDLE_FILE_INFORMATION fi2; + GetFileInformationByHandle(h1, &fi1); + GetFileInformationByHandle(h2, &fi2); + result = (fi1.dwVolumeSerialNumber == fi2.dwVolumeSerialNumber && + fi1.nFileIndexHigh == fi2.nFileIndexHigh && + fi1.nFileIndexLow == fi2.nFileIndexLow); + } + CloseHandle(h1); + CloseHandle(h2); + return result; +#else + struct stat fs1, fs2; + return (stat(file1, &fs1) == 0 && stat(file2, &fs2) == 0 && + memcmp(&fs2.st_dev, &fs1.st_dev, sizeof(fs1.st_dev)) == 0 && + memcmp(&fs2.st_ino, &fs1.st_ino, sizeof(fs1.st_ino)) == 0 && + fs2.st_size == fs1.st_size); +#endif +} + +/*--------------------------------------------------------------------------*/ +/* Function to report a system error message. */ +static void kwsys_shared_forward_strerror(char* message) +{ +#if defined(_WIN32) && !defined(__CYGWIN__) + /* Implementation for Windows. */ + DWORD original = GetLastError(); + DWORD length = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS, 0, original, + MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), + message, KWSYS_SHARED_FORWARD_MAXPATH, 0); + if(length < 1 || length > KWSYS_SHARED_FORWARD_MAXPATH) + { + /* FormatMessage failed. Use a default message. */ + _snprintf(message, KWSYS_SHARED_FORWARD_MAXPATH, + "Error 0x%X (FormatMessage failed with error 0x%X)", + original, GetLastError()); + } +#else + /* Implementation for UNIX. */ + strcpy(message, strerror(errno)); +#endif +} + +/*--------------------------------------------------------------------------*/ +/* Functions to execute a child process. */ +static void kwsys_shared_forward_execvp(const char* cmd, + char const* const* argv) +{ +#ifdef KWSYS_SHARED_FORWARD_ESCAPE_ARGV + /* Count the number of arguments. */ + int argc = 0; + { + char const* const* argvc; + for(argvc = argv; *argvc; ++argvc,++argc) {} + } + + /* Create the escaped arguments. */ + { + char** nargv = (char**)malloc((argc+1) * sizeof(char*)); + int i; + for(i=0; i < argc; ++i) + { + kwsys_sf_arg_info info = kwsys_sf_get_arg_info(argv[i]); + nargv[i] = (char*)malloc(info.size); + kwsys_sf_get_arg(info, nargv[i]); + } + nargv[argc] = 0; + + /* Replace the command line to be used. */ + argv = (char const* const*)nargv; + } +#endif + + /* Invoke the child process. */ +#if defined(_MSC_VER) + _execvp(cmd, argv); +#elif defined(__MINGW32__) && !defined(__MINGW64__) + execvp(cmd, argv); +#else + execvp(cmd, (char* const*)argv); +#endif +} + +/*--------------------------------------------------------------------------*/ +/* Function to get the directory containing the given file or directory. */ +static void kwsys_shared_forward_dirname(const char* begin, char* result) +{ + /* Find the location of the last slash. */ + int last_slash_index = -1; + const char* end = begin + strlen(begin); + for(;begin <= end && last_slash_index < 0; --end) + { + if(*end == '/' || *end == '\\') + { + last_slash_index = (int)(end-begin); + } + } + + /* Handle each case of the index of the last slash. */ + if(last_slash_index < 0) + { + /* No slashes. */ + strcpy(result, "."); + } + else if(last_slash_index == 0) + { + /* Only one leading slash. */ + strcpy(result, kwsys_shared_forward_path_slash); + } +#if defined(_WIN32) + else if(last_slash_index == 2 && begin[1] == ':') + { + /* Only one leading drive letter and slash. */ + strncpy(result, begin, (size_t)last_slash_index); + result[last_slash_index] = KWSYS_SHARED_FORWARD_PATH_SLASH; + result[last_slash_index+1] = 0; + } +#endif + else + { + /* A non-leading slash. */ + strncpy(result, begin, (size_t)last_slash_index); + result[last_slash_index] = 0; + } +} + +/*--------------------------------------------------------------------------*/ +/* Function to check if a file exists and is executable. */ +static int kwsys_shared_forward_is_executable(const char* f) +{ +#if defined(_MSC_VER) +# define KWSYS_SHARED_FORWARD_ACCESS _access +#else +# define KWSYS_SHARED_FORWARD_ACCESS access +#endif +#if defined(X_OK) +# define KWSYS_SHARED_FORWARD_ACCESS_OK X_OK +#else +# define KWSYS_SHARED_FORWARD_ACCESS_OK 04 +#endif + if(KWSYS_SHARED_FORWARD_ACCESS(f, KWSYS_SHARED_FORWARD_ACCESS_OK) == 0) + { + return 1; + } + else + { + return 0; + } +} + +/*--------------------------------------------------------------------------*/ +/* Function to locate the executable currently running. */ +static int kwsys_shared_forward_self_path(const char* argv0, char* result) +{ + /* Check whether argv0 has a slash. */ + int has_slash = 0; + const char* p = argv0; + for(;*p && !has_slash; ++p) + { + if(*p == '/' || *p == '\\') + { + has_slash = 1; + } + } + + if(has_slash) + { + /* There is a slash. Use the dirname of the given location. */ + kwsys_shared_forward_dirname(argv0, result); + return 1; + } + else + { + /* There is no slash. Search the PATH for the executable. */ + const char* path = getenv("PATH"); + const char* begin = path; + const char* end = begin + (begin?strlen(begin):0); + const char* first = begin; + while(first != end) + { + /* Store the end of this path entry. */ + const char* last; + + /* Skip all path separators. */ + for(;*first && *first == KWSYS_SHARED_FORWARD_PATH_SEP; ++first); + + /* Find the next separator. */ + for(last = first;*last && *last != KWSYS_SHARED_FORWARD_PATH_SEP; ++last); + + /* If we got a non-empty directory, look for the executable there. */ + if(first < last) + { + /* Determine the length without trailing slash. */ + size_t length = (size_t)(last-first); + if(*(last-1) == '/' || *(last-1) == '\\') + { + --length; + } + + /* Construct the name of the executable in this location. */ + strncpy(result, first, length); + result[length] = KWSYS_SHARED_FORWARD_PATH_SLASH; + strcpy(result+(length)+1, argv0); + + /* Check if it exists and is executable. */ + if(kwsys_shared_forward_is_executable(result)) + { + /* Found it. */ + result[length] = 0; + return 1; + } + } + + /* Move to the next directory in the path. */ + first = last; + } + } + + /* We could not find the executable. */ + return 0; +} + +/*--------------------------------------------------------------------------*/ +/* Function to convert a specified path to a full path. If it is not + already full, it is taken relative to the self path. */ +static int kwsys_shared_forward_fullpath(const char* self_path, + const char* in_path, + char* result, + const char* desc) +{ + /* Check the specified path type. */ + if(in_path[0] == '/') + { + /* Already a full path. */ + strcpy(result, in_path); + } +#if defined(_WIN32) + else if(in_path[0] && in_path[1] == ':') + { + /* Already a full path. */ + strcpy(result, in_path); + } +#endif + else + { + /* Relative to self path. */ + char temp_path[KWSYS_SHARED_FORWARD_MAXPATH]; + strcpy(temp_path, self_path); + strcat(temp_path, kwsys_shared_forward_path_slash); + strcat(temp_path, in_path); + if(!kwsys_shared_forward_realpath(temp_path, result)) + { + if(desc) + { + char msgbuf[KWSYS_SHARED_FORWARD_MAXPATH]; + kwsys_shared_forward_strerror(msgbuf); + fprintf(stderr, "Error converting %s \"%s\" to real path: %s\n", + desc, temp_path, msgbuf); + } + return 0; + } + } + return 1; +} + +/*--------------------------------------------------------------------------*/ +/* Function to compute the library search path and executable name + based on the self path. */ +static int kwsys_shared_forward_get_settings(const char* self_path, + char* ldpath, char* exe) +{ + /* Possible search paths. */ + static const char* search_path_build[] = {KWSYS_SHARED_FORWARD_PATH_BUILD, 0}; + static const char* search_path_install[] = {KWSYS_SHARED_FORWARD_PATH_INSTALL, 0}; + + /* Chosen paths. */ + const char** search_path; + const char* exe_path; + + /* Get the real name of the build and self paths. */ +#if defined(KWSYS_SHARED_FORWARD_CONFIG_NAME) + char build_path[] = KWSYS_SHARED_FORWARD_DIR_BUILD "/" KWSYS_SHARED_FORWARD_CONFIG_NAME; + char self_path_logical[KWSYS_SHARED_FORWARD_MAXPATH]; +#else + char build_path[] = KWSYS_SHARED_FORWARD_DIR_BUILD; + const char* self_path_logical = self_path; +#endif + char build_path_real[KWSYS_SHARED_FORWARD_MAXPATH]; + char self_path_real[KWSYS_SHARED_FORWARD_MAXPATH]; + if(!kwsys_shared_forward_realpath(self_path, self_path_real)) + { + char msgbuf[KWSYS_SHARED_FORWARD_MAXPATH]; + kwsys_shared_forward_strerror(msgbuf); + fprintf(stderr, "Error converting self path \"%s\" to real path: %s\n", + self_path, msgbuf); + return 0; + } + + /* Check whether we are running in the build tree or an install tree. */ + if(kwsys_shared_forward_realpath(build_path, build_path_real) && + kwsys_shared_forward_samepath(self_path_real, build_path_real)) + { + /* Running in build tree. Use the build path and exe. */ + search_path = search_path_build; +#if defined(_WIN32) + exe_path = KWSYS_SHARED_FORWARD_EXE_BUILD ".exe"; +#else + exe_path = KWSYS_SHARED_FORWARD_EXE_BUILD; +#endif + +#if defined(KWSYS_SHARED_FORWARD_CONFIG_NAME) + /* Remove the configuration directory from self_path. */ + kwsys_shared_forward_dirname(self_path, self_path_logical); +#endif + } + else + { + /* Running in install tree. Use the install path and exe. */ + search_path = search_path_install; +#if defined(_WIN32) + exe_path = KWSYS_SHARED_FORWARD_EXE_INSTALL ".exe"; +#else + exe_path = KWSYS_SHARED_FORWARD_EXE_INSTALL; +#endif + +#if defined(KWSYS_SHARED_FORWARD_CONFIG_NAME) + /* Use the original self path directory. */ + strcpy(self_path_logical, self_path); +#endif + } + + /* Construct the runtime search path. */ + { + const char** dir; + for(dir = search_path; *dir; ++dir) + { + /* Add separator between path components. */ + if(dir != search_path) + { + strcat(ldpath, kwsys_shared_forward_path_sep); + } + + /* Add this path component. */ + if(!kwsys_shared_forward_fullpath(self_path_logical, *dir, + ldpath+strlen(ldpath), + "runtime path entry")) + { + return 0; + } + } + } + + /* Construct the executable location. */ + if(!kwsys_shared_forward_fullpath(self_path_logical, exe_path, exe, + "executable file")) + { + return 0; + } + return 1; +} + +/*--------------------------------------------------------------------------*/ +/* Function to print why execution of a command line failed. */ +static void kwsys_shared_forward_print_failure(char const* const* argv) +{ + char msg[KWSYS_SHARED_FORWARD_MAXPATH]; + char const* const* arg = argv; + kwsys_shared_forward_strerror(msg); + fprintf(stderr, "Error running"); + for(; *arg; ++arg) + { + fprintf(stderr, " \"%s\"", *arg); + } + fprintf(stderr, ": %s\n", msg); +} + +/* Static storage space to store the updated environment variable. */ +static char kwsys_shared_forward_ldpath[65535] = KWSYS_SHARED_FORWARD_LDPATH "="; + +/*--------------------------------------------------------------------------*/ +/* Main driver function to be called from main. */ +static int @KWSYS_NAMESPACE@_shared_forward_to_real(int argc, char** argv_in) +{ + char const** argv = (char const**)argv_in; + /* Get the directory containing this executable. */ + char self_path[KWSYS_SHARED_FORWARD_MAXPATH]; + if(kwsys_shared_forward_self_path(argv[0], self_path)) + { + /* Found this executable. Use it to get the library directory. */ + char exe[KWSYS_SHARED_FORWARD_MAXPATH]; + if(kwsys_shared_forward_get_settings(self_path, + kwsys_shared_forward_ldpath, exe)) + { + /* Append the old runtime search path. */ + const char* old_ldpath = getenv(KWSYS_SHARED_FORWARD_LDPATH); + if(old_ldpath) + { + strcat(kwsys_shared_forward_ldpath, kwsys_shared_forward_path_sep); + strcat(kwsys_shared_forward_ldpath, old_ldpath); + } + + /* Store the environment variable. */ + putenv(kwsys_shared_forward_ldpath); + +#if defined(KWSYS_SHARED_FORWARD_OPTION_COMMAND) + /* Look for the command line replacement option. */ + if(argc > 1 && strcmp(argv[1], KWSYS_SHARED_FORWARD_OPTION_COMMAND) == 0) + { + if(argc > 2) + { + /* Use the command line given. */ + strcpy(exe, argv[2]); + argv += 2; + argc -= 2; + } + else + { + /* The option was not given an executable. */ + fprintf(stderr, "Option " KWSYS_SHARED_FORWARD_OPTION_COMMAND + " must be followed by a command line.\n"); + return 1; + } + } +#endif + +#if defined(KWSYS_SHARED_FORWARD_OPTION_PRINT) + /* Look for the print command line option. */ + if(argc > 1 && strcmp(argv[1], KWSYS_SHARED_FORWARD_OPTION_PRINT) == 0) + { + fprintf(stdout, "%s\n", kwsys_shared_forward_ldpath); + fprintf(stdout, "%s\n", exe); + return 0; + } +#endif + +#if defined(KWSYS_SHARED_FORWARD_OPTION_LDD) + /* Look for the ldd command line option. */ + if(argc > 1 && strcmp(argv[1], KWSYS_SHARED_FORWARD_OPTION_LDD) == 0) + { +# if defined(KWSYS_SHARED_FORWARD_LDD) + /* Use the named ldd-like executable and arguments. */ + char const* ldd_argv[] = {KWSYS_SHARED_FORWARD_LDD, 0, 0}; + ldd_argv[KWSYS_SHARED_FORWARD_LDD_N] = exe; + kwsys_shared_forward_execvp(ldd_argv[0], ldd_argv); + + /* Report why execution failed. */ + kwsys_shared_forward_print_failure(ldd_argv); + return 1; +# else + /* We have no ldd-like executable available on this platform. */ + fprintf(stderr, "No ldd-like tool is known to this executable.\n"); + return 1; +# endif + } +#endif + + /* Replace this process with the real executable. */ + argv[0] = exe; + kwsys_shared_forward_execvp(argv[0], argv); + + /* Report why execution failed. */ + kwsys_shared_forward_print_failure(argv); + } + else + { + /* Could not convert self path to the library directory. */ + } + } + else + { + /* Could not find this executable. */ + fprintf(stderr, "Error locating executable \"%s\".\n", argv[0]); + } + + /* Avoid unused argument warning. */ + (void)argc; + + /* Exit with failure. */ + return 1; +} + +/* Restore warning stack. */ +#if defined(__clang__) && defined(__has_warning) +# if __has_warning("-Wcast-qual") +# pragma clang diagnostic pop +# endif +#endif + +#else +# error "@KWSYS_NAMESPACE@/SharedForward.h should be included only once." +#endif |