Guido van Rossum | 582646a | 1996-05-28 22:30:17 +0000 | [diff] [blame] | 1 | /* Return the initial module search path. */ |
| 2 | |
Guido van Rossum | 667d704 | 1995-08-04 04:20:48 +0000 | [diff] [blame] | 3 | #include "Python.h" |
| 4 | #include "osdefs.h" |
| 5 | |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 6 | #include <sys/types.h> |
Guido van Rossum | 21f8497 | 1997-06-02 22:18:31 +0000 | [diff] [blame] | 7 | #include <string.h> |
Guido van Rossum | 667d704 | 1995-08-04 04:20:48 +0000 | [diff] [blame] | 8 | |
Brett Cannon | f6af76d | 2004-06-26 04:03:06 +0000 | [diff] [blame] | 9 | #ifdef __APPLE__ |
Dan Willemsen | 6a4b58d | 2020-07-14 16:46:20 -0700 | [diff] [blame^] | 10 | #include <AvailabilityMacros.h> |
Guido van Rossum | 54ecc3d | 1999-01-27 17:53:11 +0000 | [diff] [blame] | 11 | #include <mach-o/dyld.h> |
| 12 | #endif |
| 13 | |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 14 | /* Search in some common locations for the associated Python libraries. |
| 15 | * |
| 16 | * Two directories must be found, the platform independent directory |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 17 | * (prefix), containing the common .py and .pyc files, and the platform |
| 18 | * dependent directory (exec_prefix), containing the shared library |
| 19 | * modules. Note that prefix and exec_prefix can be the same directory, |
| 20 | * but for some installations, they are different. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 21 | * |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 22 | * Py_GetPath() carries out separate searches for prefix and exec_prefix. |
| 23 | * Each search tries a number of different locations until a ``landmark'' |
| 24 | * file or directory is found. If no prefix or exec_prefix is found, a |
| 25 | * warning message is issued and the preprocessor defined PREFIX and |
| 26 | * EXEC_PREFIX are used (even though they will not work); python carries on |
| 27 | * as best as is possible, but most imports will fail. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 28 | * |
| 29 | * Before any searches are done, the location of the executable is |
Georg Brandl | 7478096 | 2007-03-10 07:38:14 +0000 | [diff] [blame] | 30 | * determined. If argv[0] has one or more slashes in it, it is used |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 31 | * unchanged. Otherwise, it must have been invoked from the shell's path, |
| 32 | * so we search $PATH for the named executable and use that. If the |
| 33 | * executable was not found on $PATH (or there was no $PATH environment |
| 34 | * variable), the original argv[0] string is used. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 35 | * |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 36 | * Next, the executable location is examined to see if it is a symbolic |
| 37 | * link. If so, the link is chased (correctly interpreting a relative |
| 38 | * pathname if one is found) and the directory of the link target is used. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 39 | * |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 40 | * Finally, argv0_path is set to the directory containing the executable |
| 41 | * (i.e. the last component is stripped). |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 42 | * |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 43 | * With argv0_path in hand, we perform a number of steps. The same steps |
| 44 | * are performed for prefix and for exec_prefix, but with a different |
| 45 | * landmark. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 46 | * |
| 47 | * Step 1. Are we running python out of the build directory? This is |
| 48 | * checked by looking for a different kind of landmark relative to |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 49 | * argv0_path. For prefix, the landmark's path is derived from the VPATH |
| 50 | * preprocessor variable (taking into account that its value is almost, but |
| 51 | * not quite, what we need). For exec_prefix, the landmark is |
| 52 | * Modules/Setup. If the landmark is found, we're done. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 53 | * |
| 54 | * For the remaining steps, the prefix landmark will always be |
Jeremy Hylton | 847a996 | 2000-05-26 21:49:07 +0000 | [diff] [blame] | 55 | * lib/python$VERSION/os.py and the exec_prefix will always be |
Guido van Rossum | 266033e | 1997-10-20 23:20:32 +0000 | [diff] [blame] | 56 | * lib/python$VERSION/lib-dynload, where $VERSION is Python's version |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 57 | * number as supplied by the Makefile. Note that this means that no more |
| 58 | * build directory checking is performed; if the first step did not find |
| 59 | * the landmarks, the assumption is that python is running from an |
| 60 | * installed setup. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 61 | * |
| 62 | * Step 2. See if the $PYTHONHOME environment variable points to the |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 63 | * installed location of the Python libraries. If $PYTHONHOME is set, then |
| 64 | * it points to prefix and exec_prefix. $PYTHONHOME can be a single |
| 65 | * directory, which is used for both, or the prefix and exec_prefix |
| 66 | * directories separated by a colon. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 67 | * |
| 68 | * Step 3. Try to find prefix and exec_prefix relative to argv0_path, |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 69 | * backtracking up the path until it is exhausted. This is the most common |
| 70 | * step to succeed. Note that if prefix and exec_prefix are different, |
| 71 | * exec_prefix is more likely to be found; however if exec_prefix is a |
| 72 | * subdirectory of prefix, both will be found. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 73 | * |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 74 | * Step 4. Search the directories pointed to by the preprocessor variables |
| 75 | * PREFIX and EXEC_PREFIX. These are supplied by the Makefile but can be |
| 76 | * passed in as options to the configure script. |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 77 | * |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 78 | * That's it! |
| 79 | * |
| 80 | * Well, almost. Once we have determined prefix and exec_prefix, the |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 81 | * preprocessor variable PYTHONPATH is used to construct a path. Each |
Barry Warsaw | 9012603 | 1997-04-11 20:27:03 +0000 | [diff] [blame] | 82 | * relative path on PYTHONPATH is prefixed with prefix. Then the directory |
| 83 | * containing the shared library modules is appended. The environment |
| 84 | * variable $PYTHONPATH is inserted in front of it all. Finally, the |
| 85 | * prefix and exec_prefix globals are tweaked so they reflect the values |
| 86 | * expected by other code, by stripping the "lib/python$VERSION/..." stuff |
| 87 | * off. If either points to the build directory, the globals are reset to |
| 88 | * the corresponding preprocessor variables (so sys.prefix will reflect the |
| 89 | * installation location, even though sys.path points into the build |
| 90 | * directory). This seems to make more sense given that currently the only |
| 91 | * known use of sys.prefix and sys.exec_prefix is for the ILU installation |
| 92 | * process to find the installed Python tree. |
| 93 | */ |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 94 | |
Anthony Baxter | ac6bd46 | 2006-04-13 02:06:09 +0000 | [diff] [blame] | 95 | #ifdef __cplusplus |
| 96 | extern "C" { |
| 97 | #endif |
| 98 | |
| 99 | |
Benjamin Peterson | e725777 | 2016-06-02 12:41:35 -0700 | [diff] [blame] | 100 | #if !defined(PREFIX) || !defined(EXEC_PREFIX) || !defined(VERSION) || !defined(VPATH) |
| 101 | #error "PREFIX, EXEC_PREFIX, VERSION, and VPATH must be constant defined" |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 102 | #endif |
Guido van Rossum | 667d704 | 1995-08-04 04:20:48 +0000 | [diff] [blame] | 103 | |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 104 | #ifndef LANDMARK |
Jeremy Hylton | 847a996 | 2000-05-26 21:49:07 +0000 | [diff] [blame] | 105 | #define LANDMARK "os.py" |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 106 | #endif |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 107 | |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 108 | static char prefix[MAXPATHLEN+1]; |
| 109 | static char exec_prefix[MAXPATHLEN+1]; |
Guido van Rossum | 7929c6f | 1997-05-20 22:38:21 +0000 | [diff] [blame] | 110 | static char progpath[MAXPATHLEN+1]; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 111 | static char *module_search_path = NULL; |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 112 | #ifdef ANDROID_LIB_PYTHON_PATH |
| 113 | static char lib_python[] = ANDROID_LIB_PYTHON_PATH; |
| 114 | #else |
Fred Drake | b64c223 | 2000-09-28 14:32:29 +0000 | [diff] [blame] | 115 | static char lib_python[] = "lib/python" VERSION; |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 116 | #endif |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 117 | |
| 118 | static void |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 119 | reduce(char *dir) |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 120 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 121 | size_t i = strlen(dir); |
| 122 | while (i > 0 && dir[i] != SEP) |
| 123 | --i; |
| 124 | dir[i] = '\0'; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 125 | } |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 126 | |
| 127 | |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 128 | static int |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 129 | isfile(char *filename) /* Is file, not directory */ |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 130 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 131 | struct stat buf; |
| 132 | if (stat(filename, &buf) != 0) |
| 133 | return 0; |
| 134 | if (!S_ISREG(buf.st_mode)) |
| 135 | return 0; |
| 136 | return 1; |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | |
| 140 | static int |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 141 | ismodule(char *filename) /* Is module -- check for .pyc/.pyo too */ |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 142 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 143 | if (isfile(filename)) |
| 144 | return 1; |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 145 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 146 | /* Check for the compiled version of prefix. */ |
| 147 | if (strlen(filename) < MAXPATHLEN) { |
| 148 | strcat(filename, Py_OptimizeFlag ? "o" : "c"); |
| 149 | if (isfile(filename)) |
| 150 | return 1; |
| 151 | } |
| 152 | return 0; |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | |
| 156 | static int |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 157 | isxfile(char *filename) /* Is executable file */ |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 158 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 159 | struct stat buf; |
| 160 | if (stat(filename, &buf) != 0) |
| 161 | return 0; |
| 162 | if (!S_ISREG(buf.st_mode)) |
| 163 | return 0; |
| 164 | if ((buf.st_mode & 0111) == 0) |
| 165 | return 0; |
| 166 | return 1; |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | |
| 170 | static int |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 171 | isdir(char *filename) /* Is directory */ |
Guido van Rossum | d29806c | 1998-01-19 22:06:22 +0000 | [diff] [blame] | 172 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 173 | struct stat buf; |
| 174 | if (stat(filename, &buf) != 0) |
| 175 | return 0; |
| 176 | if (!S_ISDIR(buf.st_mode)) |
| 177 | return 0; |
| 178 | return 1; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
Tim Peters | ec8c5a9 | 2004-08-08 01:00:47 +0000 | [diff] [blame] | 182 | /* Add a path component, by appending stuff to buffer. |
| 183 | buffer must have at least MAXPATHLEN + 1 bytes allocated, and contain a |
| 184 | NUL-terminated string with no more than MAXPATHLEN characters (not counting |
| 185 | the trailing NUL). It's a fatal error if it contains a string longer than |
| 186 | that (callers must be careful!). If these requirements are met, it's |
| 187 | guaranteed that buffer will still be a NUL-terminated string with no more |
| 188 | than MAXPATHLEN characters at exit. If stuff is too long, only as much of |
| 189 | stuff as fits will be appended. |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 190 | */ |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 191 | static void |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 192 | joinpath(char *buffer, char *stuff) |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 193 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 194 | size_t n, k; |
| 195 | if (stuff[0] == SEP) |
| 196 | n = 0; |
| 197 | else { |
| 198 | n = strlen(buffer); |
| 199 | if (n > 0 && buffer[n-1] != SEP && n < MAXPATHLEN) |
| 200 | buffer[n++] = SEP; |
| 201 | } |
Tim Peters | ec8c5a9 | 2004-08-08 01:00:47 +0000 | [diff] [blame] | 202 | if (n > MAXPATHLEN) |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 203 | Py_FatalError("buffer overflow in getpath.c's joinpath()"); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 204 | k = strlen(stuff); |
| 205 | if (n + k > MAXPATHLEN) |
| 206 | k = MAXPATHLEN - n; |
| 207 | strncpy(buffer+n, stuff, k); |
| 208 | buffer[n+k] = '\0'; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 209 | } |
| 210 | |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 211 | /* copy_absolute requires that path be allocated at least |
| 212 | MAXPATHLEN + 1 bytes and that p be no more than MAXPATHLEN bytes. */ |
Jeremy Hylton | 7198ba9 | 2000-09-25 17:00:24 +0000 | [diff] [blame] | 213 | static void |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 214 | copy_absolute(char *path, char *p) |
Jeremy Hylton | 7198ba9 | 2000-09-25 17:00:24 +0000 | [diff] [blame] | 215 | { |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 216 | if (p[0] == SEP) |
| 217 | strcpy(path, p); |
Jeremy Hylton | 7198ba9 | 2000-09-25 17:00:24 +0000 | [diff] [blame] | 218 | else { |
Victor Stinner | 354fe7e | 2010-10-07 23:37:08 +0000 | [diff] [blame] | 219 | if (!getcwd(path, MAXPATHLEN)) { |
| 220 | /* unable to get the current directory */ |
| 221 | strcpy(path, p); |
| 222 | return; |
| 223 | } |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 224 | if (p[0] == '.' && p[1] == SEP) |
| 225 | p += 2; |
| 226 | joinpath(path, p); |
Jeremy Hylton | 7198ba9 | 2000-09-25 17:00:24 +0000 | [diff] [blame] | 227 | } |
| 228 | } |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 229 | |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 230 | /* absolutize() requires that path be allocated at least MAXPATHLEN+1 bytes. */ |
| 231 | static void |
| 232 | absolutize(char *path) |
| 233 | { |
| 234 | char buffer[MAXPATHLEN + 1]; |
| 235 | |
| 236 | if (path[0] == SEP) |
| 237 | return; |
| 238 | copy_absolute(buffer, path); |
| 239 | strcpy(path, buffer); |
| 240 | } |
| 241 | |
| 242 | /* search_for_prefix requires that argv0_path be no more than MAXPATHLEN |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 243 | bytes long. |
| 244 | */ |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 245 | static int |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 246 | search_for_prefix(char *argv0_path, char *home) |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 247 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 248 | size_t n; |
| 249 | char *vpath; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 250 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 251 | /* If PYTHONHOME is set, we believe it unconditionally */ |
| 252 | if (home) { |
| 253 | char *delim; |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 254 | strncpy(prefix, home, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 255 | delim = strchr(prefix, DELIM); |
| 256 | if (delim) |
| 257 | *delim = '\0'; |
| 258 | joinpath(prefix, lib_python); |
| 259 | joinpath(prefix, LANDMARK); |
| 260 | return 1; |
| 261 | } |
Jeremy Hylton | 847a996 | 2000-05-26 21:49:07 +0000 | [diff] [blame] | 262 | |
Nan Zhang | ced2751 | 2017-06-19 18:01:34 -0700 | [diff] [blame] | 263 | /* Check to see if argv[0] is in the build directory */ |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 264 | strcpy(prefix, argv0_path); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 265 | joinpath(prefix, "Modules/Setup"); |
| 266 | if (isfile(prefix)) { |
Neil Schemenauer | 6cf0702 | 2001-01-24 17:13:11 +0000 | [diff] [blame] | 267 | /* Check VPATH to see if argv0_path is in the build directory. */ |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 268 | vpath = VPATH; |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 269 | strcpy(prefix, argv0_path); |
| 270 | joinpath(prefix, vpath); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 271 | joinpath(prefix, "Lib"); |
| 272 | joinpath(prefix, LANDMARK); |
| 273 | if (ismodule(prefix)) |
| 274 | return -1; |
| 275 | } |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 276 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 277 | /* Search from argv0_path, until root is found */ |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 278 | copy_absolute(prefix, argv0_path); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 279 | do { |
| 280 | n = strlen(prefix); |
| 281 | joinpath(prefix, lib_python); |
| 282 | joinpath(prefix, LANDMARK); |
| 283 | if (ismodule(prefix)) |
| 284 | return 1; |
| 285 | prefix[n] = '\0'; |
| 286 | reduce(prefix); |
| 287 | } while (prefix[0]); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 288 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 289 | /* Look at configure's PREFIX */ |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 290 | strncpy(prefix, PREFIX, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 291 | joinpath(prefix, lib_python); |
| 292 | joinpath(prefix, LANDMARK); |
| 293 | if (ismodule(prefix)) |
| 294 | return 1; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 295 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 296 | /* Fail */ |
| 297 | return 0; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 301 | /* search_for_exec_prefix requires that argv0_path be no more than |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 302 | MAXPATHLEN bytes long. |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 303 | */ |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 304 | static int |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 305 | search_for_exec_prefix(char *argv0_path, char *home) |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 306 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 307 | size_t n; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 308 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 309 | /* If PYTHONHOME is set, we believe it unconditionally */ |
| 310 | if (home) { |
| 311 | char *delim; |
| 312 | delim = strchr(home, DELIM); |
| 313 | if (delim) |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 314 | strncpy(exec_prefix, delim+1, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 315 | else |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 316 | strncpy(exec_prefix, home, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 317 | joinpath(exec_prefix, lib_python); |
| 318 | joinpath(exec_prefix, "lib-dynload"); |
| 319 | return 1; |
| 320 | } |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 321 | |
doko@ubuntu.com | 6cb4343 | 2013-04-08 21:20:09 +0200 | [diff] [blame] | 322 | /* Check to see if argv[0] is in the build directory. "pybuilddir.txt" |
| 323 | is written by setup.py and contains the relative path to the location |
| 324 | of shared library modules. */ |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 325 | strcpy(exec_prefix, argv0_path); |
doko@ubuntu.com | 6cb4343 | 2013-04-08 21:20:09 +0200 | [diff] [blame] | 326 | joinpath(exec_prefix, "pybuilddir.txt"); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 327 | if (isfile(exec_prefix)) { |
doko@ubuntu.com | 6cb4343 | 2013-04-08 21:20:09 +0200 | [diff] [blame] | 328 | FILE *f = fopen(exec_prefix, "r"); |
| 329 | if (f == NULL) |
| 330 | errno = 0; |
| 331 | else { |
| 332 | char rel_builddir_path[MAXPATHLEN+1]; |
| 333 | size_t n; |
| 334 | n = fread(rel_builddir_path, 1, MAXPATHLEN, f); |
| 335 | rel_builddir_path[n] = '\0'; |
| 336 | fclose(f); |
Serhiy Storchaka | 6a35bf6 | 2016-10-08 09:58:08 +0300 | [diff] [blame] | 337 | strcpy(exec_prefix, argv0_path); |
| 338 | joinpath(exec_prefix, rel_builddir_path); |
| 339 | return -1; |
doko@ubuntu.com | 6cb4343 | 2013-04-08 21:20:09 +0200 | [diff] [blame] | 340 | } |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 341 | } |
Jeremy Hylton | 847a996 | 2000-05-26 21:49:07 +0000 | [diff] [blame] | 342 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 343 | /* Search from argv0_path, until root is found */ |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 344 | copy_absolute(exec_prefix, argv0_path); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 345 | do { |
| 346 | n = strlen(exec_prefix); |
| 347 | joinpath(exec_prefix, lib_python); |
| 348 | joinpath(exec_prefix, "lib-dynload"); |
| 349 | if (isdir(exec_prefix)) |
| 350 | return 1; |
| 351 | exec_prefix[n] = '\0'; |
| 352 | reduce(exec_prefix); |
| 353 | } while (exec_prefix[0]); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 354 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 355 | /* Look at configure's EXEC_PREFIX */ |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 356 | strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 357 | joinpath(exec_prefix, lib_python); |
| 358 | joinpath(exec_prefix, "lib-dynload"); |
| 359 | if (isdir(exec_prefix)) |
| 360 | return 1; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 361 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 362 | /* Fail */ |
| 363 | return 0; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | |
| 367 | static void |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 368 | calculate_path(void) |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 369 | { |
Thomas Wouters | bd4bc4e | 2000-07-22 23:57:55 +0000 | [diff] [blame] | 370 | extern char *Py_GetProgramName(void); |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 371 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 372 | static char delimiter[2] = {DELIM, '\0'}; |
| 373 | static char separator[2] = {SEP, '\0'}; |
| 374 | char *pythonpath = PYTHONPATH; |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 375 | char *rtpypath = Py_GETENV("PYTHONPATH"); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 376 | char *home = Py_GetPythonHome(); |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 377 | char *path = getenv("PATH"); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 378 | char *prog = Py_GetProgramName(); |
| 379 | char argv0_path[MAXPATHLEN+1]; |
Nan Zhang | ced2751 | 2017-06-19 18:01:34 -0700 | [diff] [blame] | 380 | char zip_path[MAXPATHLEN+1]; |
| 381 | int pfound, efound; /* 1 if found; -1 if found build directory */ |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 382 | char *buf; |
| 383 | size_t bufsz; |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 384 | size_t prefixsz; |
| 385 | char *defpath = pythonpath; |
Guido van Rossum | 54ecc3d | 1999-01-27 17:53:11 +0000 | [diff] [blame] | 386 | #ifdef WITH_NEXT_FRAMEWORK |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 387 | NSModule pythonModule; |
Guido van Rossum | 54ecc3d | 1999-01-27 17:53:11 +0000 | [diff] [blame] | 388 | #endif |
Jack Jansen | 1afd480 | 2004-06-03 14:33:03 +0000 | [diff] [blame] | 389 | #ifdef __APPLE__ |
Skip Montanaro | 2b47445 | 2006-01-05 10:49:13 +0000 | [diff] [blame] | 390 | #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4 |
Brett Cannon | bd9c3f7 | 2005-09-16 02:43:35 +0000 | [diff] [blame] | 391 | uint32_t nsexeclength = MAXPATHLEN; |
Skip Montanaro | 2b47445 | 2006-01-05 10:49:13 +0000 | [diff] [blame] | 392 | #else |
| 393 | unsigned long nsexeclength = MAXPATHLEN; |
| 394 | #endif |
Jack Jansen | 1afd480 | 2004-06-03 14:33:03 +0000 | [diff] [blame] | 395 | #endif |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 396 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 397 | /* If there is no slash in the argv0 path, then we have to |
| 398 | * assume python is on the user's $PATH, since there's no |
| 399 | * other way to find a directory to start the search from. If |
| 400 | * $PATH isn't exported, you lose. |
| 401 | */ |
| 402 | if (strchr(prog, SEP)) |
| 403 | strncpy(progpath, prog, MAXPATHLEN); |
Jack Jansen | 1afd480 | 2004-06-03 14:33:03 +0000 | [diff] [blame] | 404 | #ifdef __APPLE__ |
| 405 | /* On Mac OS X, if a script uses an interpreter of the form |
| 406 | * "#!/opt/python2.3/bin/python", the kernel only passes "python" |
| 407 | * as argv[0], which falls through to the $PATH search below. |
| 408 | * If /opt/python2.3/bin isn't in your path, or is near the end, |
| 409 | * this algorithm may incorrectly find /usr/bin/python. To work |
| 410 | * around this, we can use _NSGetExecutablePath to get a better |
| 411 | * hint of what the intended interpreter was, although this |
| 412 | * will fail if a relative path was used. but in that case, |
| 413 | * absolutize() should help us out below |
| 414 | */ |
| 415 | else if(0 == _NSGetExecutablePath(progpath, &nsexeclength) && progpath[0] == SEP) |
| 416 | ; |
Brett Cannon | 6cc4814 | 2004-06-24 00:48:44 +0000 | [diff] [blame] | 417 | #endif /* __APPLE__ */ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 418 | else if (path) { |
| 419 | while (1) { |
| 420 | char *delim = strchr(path, DELIM); |
Jack Jansen | 55070f5 | 2001-12-02 23:56:28 +0000 | [diff] [blame] | 421 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 422 | if (delim) { |
| 423 | size_t len = delim - path; |
| 424 | if (len > MAXPATHLEN) |
| 425 | len = MAXPATHLEN; |
| 426 | strncpy(progpath, path, len); |
| 427 | *(progpath + len) = '\0'; |
| 428 | } |
| 429 | else |
| 430 | strncpy(progpath, path, MAXPATHLEN); |
Jack Jansen | 55070f5 | 2001-12-02 23:56:28 +0000 | [diff] [blame] | 431 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 432 | joinpath(progpath, prog); |
| 433 | if (isxfile(progpath)) |
| 434 | break; |
Jack Jansen | 55070f5 | 2001-12-02 23:56:28 +0000 | [diff] [blame] | 435 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 436 | if (!delim) { |
| 437 | progpath[0] = '\0'; |
| 438 | break; |
| 439 | } |
| 440 | path = delim + 1; |
| 441 | } |
| 442 | } |
| 443 | else |
| 444 | progpath[0] = '\0'; |
| 445 | if (progpath[0] != SEP && progpath[0] != '\0') |
| 446 | absolutize(progpath); |
| 447 | strncpy(argv0_path, progpath, MAXPATHLEN); |
| 448 | argv0_path[MAXPATHLEN] = '\0'; |
Jack Jansen | 55070f5 | 2001-12-02 23:56:28 +0000 | [diff] [blame] | 449 | |
Guido van Rossum | 54ecc3d | 1999-01-27 17:53:11 +0000 | [diff] [blame] | 450 | #ifdef WITH_NEXT_FRAMEWORK |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 451 | /* On Mac OS X we have a special case if we're running from a framework. |
| 452 | ** This is because the python home should be set relative to the library, |
| 453 | ** which is in the framework, not relative to the executable, which may |
| 454 | ** be outside of the framework. Except when we're in the build directory... |
| 455 | */ |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 456 | pythonModule = NSModuleForSymbol(NSLookupAndBindSymbol("_Py_Initialize")); |
| 457 | /* Use dylib functions to find out where the framework was loaded from */ |
Jack Jansen | 0a116f3 | 2002-12-23 21:03:36 +0000 | [diff] [blame] | 458 | buf = (char *)NSLibraryNameForModule(pythonModule); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 459 | if (buf != NULL) { |
| 460 | /* We're in a framework. */ |
Jack Jansen | e925faf | 2001-08-15 01:14:40 +0000 | [diff] [blame] | 461 | /* See if we might be in the build directory. The framework in the |
| 462 | ** build directory is incomplete, it only has the .dylib and a few |
| 463 | ** needed symlinks, it doesn't have the Lib directories and such. |
| 464 | ** If we're running with the framework from the build directory we must |
| 465 | ** be running the interpreter in the build directory, so we use the |
| 466 | ** build-directory-specific logic to find Lib and such. |
| 467 | */ |
| 468 | strncpy(argv0_path, buf, MAXPATHLEN); |
| 469 | reduce(argv0_path); |
| 470 | joinpath(argv0_path, lib_python); |
| 471 | joinpath(argv0_path, LANDMARK); |
| 472 | if (!ismodule(argv0_path)) { |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 473 | /* We are in the build directory so use the name of the |
| 474 | executable - we know that the absolute path is passed */ |
Ronald Oussoren | c22b718 | 2010-07-23 16:12:28 +0000 | [diff] [blame] | 475 | strncpy(argv0_path, progpath, MAXPATHLEN); |
Jack Jansen | e925faf | 2001-08-15 01:14:40 +0000 | [diff] [blame] | 476 | } |
| 477 | else { |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 478 | /* Use the location of the library as the progpath */ |
Jack Jansen | 55070f5 | 2001-12-02 23:56:28 +0000 | [diff] [blame] | 479 | strncpy(argv0_path, buf, MAXPATHLEN); |
Jack Jansen | e925faf | 2001-08-15 01:14:40 +0000 | [diff] [blame] | 480 | } |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 481 | } |
Guido van Rossum | 54ecc3d | 1999-01-27 17:53:11 +0000 | [diff] [blame] | 482 | #endif |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 483 | |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 484 | #if HAVE_READLINK |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 485 | { |
| 486 | char tmpbuffer[MAXPATHLEN+1]; |
| 487 | int linklen = readlink(progpath, tmpbuffer, MAXPATHLEN); |
| 488 | while (linklen != -1) { |
| 489 | /* It's not null terminated! */ |
| 490 | tmpbuffer[linklen] = '\0'; |
| 491 | if (tmpbuffer[0] == SEP) |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 492 | /* tmpbuffer should never be longer than MAXPATHLEN, |
| 493 | but extra check does not hurt */ |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 494 | strncpy(argv0_path, tmpbuffer, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 495 | else { |
| 496 | /* Interpret relative to progpath */ |
| 497 | reduce(argv0_path); |
| 498 | joinpath(argv0_path, tmpbuffer); |
| 499 | } |
| 500 | linklen = readlink(argv0_path, tmpbuffer, MAXPATHLEN); |
| 501 | } |
| 502 | } |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 503 | #endif /* HAVE_READLINK */ |
| 504 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 505 | reduce(argv0_path); |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 506 | /* At this point, argv0_path is guaranteed to be less than |
| 507 | MAXPATHLEN bytes long. |
| 508 | */ |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 509 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 510 | if (!(pfound = search_for_prefix(argv0_path, home))) { |
| 511 | if (!Py_FrozenFlag) |
| 512 | fprintf(stderr, |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 513 | "Could not find platform independent libraries <prefix>\n"); |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 514 | strncpy(prefix, PREFIX, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 515 | joinpath(prefix, lib_python); |
| 516 | } |
| 517 | else |
| 518 | reduce(prefix); |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 519 | |
Just van Rossum | 52e14d6 | 2002-12-30 22:08:05 +0000 | [diff] [blame] | 520 | strncpy(zip_path, prefix, MAXPATHLEN); |
Neal Norwitz | b70557f | 2002-12-31 12:45:12 +0000 | [diff] [blame] | 521 | zip_path[MAXPATHLEN] = '\0'; |
Just van Rossum | 52e14d6 | 2002-12-30 22:08:05 +0000 | [diff] [blame] | 522 | if (pfound > 0) { /* Use the reduced prefix returned by Py_GetPrefix() */ |
| 523 | reduce(zip_path); |
| 524 | reduce(zip_path); |
| 525 | } |
| 526 | else |
| 527 | strncpy(zip_path, PREFIX, MAXPATHLEN); |
| 528 | joinpath(zip_path, "lib/python00.zip"); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 529 | bufsz = strlen(zip_path); /* Replace "00" with version */ |
Just van Rossum | 52e14d6 | 2002-12-30 22:08:05 +0000 | [diff] [blame] | 530 | zip_path[bufsz - 6] = VERSION[0]; |
| 531 | zip_path[bufsz - 5] = VERSION[2]; |
| 532 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 533 | if (!(efound = search_for_exec_prefix(argv0_path, home))) { |
| 534 | if (!Py_FrozenFlag) |
| 535 | fprintf(stderr, |
Guido van Rossum | e296ced | 2001-09-28 20:00:29 +0000 | [diff] [blame] | 536 | "Could not find platform dependent libraries <exec_prefix>\n"); |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 537 | strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 538 | joinpath(exec_prefix, "lib/lib-dynload"); |
| 539 | } |
| 540 | /* If we found EXEC_PREFIX do *not* reduce it! (Yet.) */ |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 541 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 542 | if ((!pfound || !efound) && !Py_FrozenFlag) |
| 543 | fprintf(stderr, |
| 544 | "Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]\n"); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 545 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 546 | /* Calculate size of return buffer. |
| 547 | */ |
| 548 | bufsz = 0; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 549 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 550 | if (rtpypath) |
| 551 | bufsz += strlen(rtpypath) + 1; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 552 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 553 | prefixsz = strlen(prefix) + 1; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 554 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 555 | while (1) { |
| 556 | char *delim = strchr(defpath, DELIM); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 557 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 558 | if (defpath[0] != SEP) |
| 559 | /* Paths are relative to prefix */ |
| 560 | bufsz += prefixsz; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 561 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 562 | if (delim) |
| 563 | bufsz += delim - defpath + 1; |
| 564 | else { |
| 565 | bufsz += strlen(defpath) + 1; |
| 566 | break; |
| 567 | } |
| 568 | defpath = delim + 1; |
| 569 | } |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 570 | |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 571 | #ifndef ANDROID_SKIP_ZIP_PATH |
Just van Rossum | 52e14d6 | 2002-12-30 22:08:05 +0000 | [diff] [blame] | 572 | bufsz += strlen(zip_path) + 1; |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 573 | #endif |
| 574 | #ifndef ANDROID_SKIP_EXEC_PREFIX_PATH |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 575 | bufsz += strlen(exec_prefix) + 1; |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 576 | #endif |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 577 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 578 | /* This is the only malloc call in this file */ |
Anthony Baxter | 64182fe | 2006-04-11 12:14:09 +0000 | [diff] [blame] | 579 | buf = (char *)PyMem_Malloc(bufsz); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 580 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 581 | if (buf == NULL) { |
| 582 | /* We can't exit, so print a warning and limp along */ |
| 583 | fprintf(stderr, "Not enough memory for dynamic PYTHONPATH.\n"); |
| 584 | fprintf(stderr, "Using default static PYTHONPATH.\n"); |
| 585 | module_search_path = PYTHONPATH; |
| 586 | } |
| 587 | else { |
| 588 | /* Run-time value of $PYTHONPATH goes first */ |
| 589 | if (rtpypath) { |
| 590 | strcpy(buf, rtpypath); |
| 591 | strcat(buf, delimiter); |
| 592 | } |
| 593 | else |
| 594 | buf[0] = '\0'; |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 595 | |
Just van Rossum | 52e14d6 | 2002-12-30 22:08:05 +0000 | [diff] [blame] | 596 | /* Next is the default zip path */ |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 597 | #ifndef ANDROID_SKIP_ZIP_PATH |
Just van Rossum | 52e14d6 | 2002-12-30 22:08:05 +0000 | [diff] [blame] | 598 | strcat(buf, zip_path); |
| 599 | strcat(buf, delimiter); |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 600 | #endif |
Just van Rossum | 52e14d6 | 2002-12-30 22:08:05 +0000 | [diff] [blame] | 601 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 602 | /* Next goes merge of compile-time $PYTHONPATH with |
| 603 | * dynamically located prefix. |
| 604 | */ |
| 605 | defpath = pythonpath; |
| 606 | while (1) { |
| 607 | char *delim = strchr(defpath, DELIM); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 608 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 609 | if (defpath[0] != SEP) { |
| 610 | strcat(buf, prefix); |
Serhiy Storchaka | 1e4b73f | 2016-11-11 12:11:55 +0200 | [diff] [blame] | 611 | if (prefixsz >= 2 && prefix[prefixsz - 2] != SEP && |
| 612 | defpath[0] != (delim ? DELIM : L'\0')) { /* not empty */ |
| 613 | strcat(buf, separator); |
| 614 | } |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 615 | } |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 616 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 617 | if (delim) { |
| 618 | size_t len = delim - defpath + 1; |
| 619 | size_t end = strlen(buf) + len; |
| 620 | strncat(buf, defpath, len); |
| 621 | *(buf + end) = '\0'; |
| 622 | } |
| 623 | else { |
| 624 | strcat(buf, defpath); |
| 625 | break; |
| 626 | } |
| 627 | defpath = delim + 1; |
| 628 | } |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 629 | #ifndef ANDROID_SKIP_EXEC_PREFIX_PATH |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 630 | strcat(buf, delimiter); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 631 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 632 | /* Finally, on goes the directory for dynamic-load modules */ |
| 633 | strcat(buf, exec_prefix); |
Dan Willemsen | 99f2754 | 2019-02-14 21:21:48 -0800 | [diff] [blame] | 634 | #endif |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 635 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 636 | /* And publish the results */ |
| 637 | module_search_path = buf; |
| 638 | } |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 639 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 640 | /* Reduce prefix and exec_prefix to their essence, |
| 641 | * e.g. /usr/local/lib/python1.5 is reduced to /usr/local. |
| 642 | * If we're loading relative to the build directory, |
| 643 | * return the compiled-in defaults instead. |
| 644 | */ |
| 645 | if (pfound > 0) { |
| 646 | reduce(prefix); |
| 647 | reduce(prefix); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 648 | /* The prefix is the root directory, but reduce() chopped |
| 649 | * off the "/". */ |
| 650 | if (!prefix[0]) |
| 651 | strcpy(prefix, separator); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 652 | } |
| 653 | else |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 654 | strncpy(prefix, PREFIX, MAXPATHLEN); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 655 | |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 656 | if (efound > 0) { |
| 657 | reduce(exec_prefix); |
| 658 | reduce(exec_prefix); |
| 659 | reduce(exec_prefix); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 660 | if (!exec_prefix[0]) |
| 661 | strcpy(exec_prefix, separator); |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 662 | } |
| 663 | else |
Jeremy Hylton | 6372fe1 | 2000-09-27 20:51:17 +0000 | [diff] [blame] | 664 | strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN); |
Guido van Rossum | 305e5d0 | 1997-04-11 17:18:45 +0000 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | |
| 668 | /* External interface */ |
Guido van Rossum | 667d704 | 1995-08-04 04:20:48 +0000 | [diff] [blame] | 669 | |
| 670 | char * |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 671 | Py_GetPath(void) |
Guido van Rossum | 667d704 | 1995-08-04 04:20:48 +0000 | [diff] [blame] | 672 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 673 | if (!module_search_path) |
| 674 | calculate_path(); |
| 675 | return module_search_path; |
Guido van Rossum | 667d704 | 1995-08-04 04:20:48 +0000 | [diff] [blame] | 676 | } |
Guido van Rossum | c34c9a5 | 1996-06-12 04:20:27 +0000 | [diff] [blame] | 677 | |
Guido van Rossum | c34c9a5 | 1996-06-12 04:20:27 +0000 | [diff] [blame] | 678 | char * |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 679 | Py_GetPrefix(void) |
Guido van Rossum | c34c9a5 | 1996-06-12 04:20:27 +0000 | [diff] [blame] | 680 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 681 | if (!module_search_path) |
| 682 | calculate_path(); |
| 683 | return prefix; |
Guido van Rossum | c34c9a5 | 1996-06-12 04:20:27 +0000 | [diff] [blame] | 684 | } |
| 685 | |
| 686 | char * |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 687 | Py_GetExecPrefix(void) |
Guido van Rossum | c34c9a5 | 1996-06-12 04:20:27 +0000 | [diff] [blame] | 688 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 689 | if (!module_search_path) |
| 690 | calculate_path(); |
| 691 | return exec_prefix; |
Guido van Rossum | c34c9a5 | 1996-06-12 04:20:27 +0000 | [diff] [blame] | 692 | } |
Guido van Rossum | 7929c6f | 1997-05-20 22:38:21 +0000 | [diff] [blame] | 693 | |
| 694 | char * |
Thomas Wouters | f3f33dc | 2000-07-21 06:00:07 +0000 | [diff] [blame] | 695 | Py_GetProgramFullPath(void) |
Guido van Rossum | 7929c6f | 1997-05-20 22:38:21 +0000 | [diff] [blame] | 696 | { |
Fred Drake | edabdc1 | 2000-07-08 06:16:37 +0000 | [diff] [blame] | 697 | if (!module_search_path) |
| 698 | calculate_path(); |
| 699 | return progpath; |
Guido van Rossum | 7929c6f | 1997-05-20 22:38:21 +0000 | [diff] [blame] | 700 | } |
Anthony Baxter | ac6bd46 | 2006-04-13 02:06:09 +0000 | [diff] [blame] | 701 | |
| 702 | |
| 703 | #ifdef __cplusplus |
| 704 | } |
| 705 | #endif |
| 706 | |