author | David Soria Parra <davidsp@fb.com> |
Tue, 14 Oct 2014 20:35:17 -0700 | |
changeset 22977 | 29ae3b190ec5 |
parent 17732 | 93d97a212559 |
child 26662 | d215def59c3b |
permissions | -rw-r--r-- |
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1 |
/* |
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2 |
exewrapper.c - wrapper for calling a python script on Windows |
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3 |
|
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4 |
Copyright 2012 Adrian Buehlmann <adrian@cadifra.com> and others |
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5 |
|
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6 |
This software may be used and distributed according to the terms of the |
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7 |
GNU General Public License version 2 or any later version. |
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8 |
*/ |
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|
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#include <stdio.h> |
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11 |
#include <windows.h> |
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12 |
|
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13 |
#include "hgpythonlib.h" |
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14 |
|
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15 |
#ifdef __GNUC__ |
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16 |
int strcat_s(char *d, size_t n, const char *s) |
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17 |
{ |
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18 |
return !strncat(d, s, n); |
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19 |
} |
17732
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20 |
int strcpy_s(char *d, size_t n, const char *s) |
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21 |
{ |
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22 |
return !strncpy(d, s, n); |
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23 |
} |
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24 |
#endif |
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25 |
|
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|
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static char pyscript[MAX_PATH + 10]; |
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28 |
static char pyhome[MAX_PATH + 10]; |
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29 |
static char envpyhome[MAX_PATH + 10]; |
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static char pydllfile[MAX_PATH + 10]; |
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|
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int main(int argc, char *argv[]) |
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33 |
{ |
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char *p; |
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int ret; |
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36 |
int i; |
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int n; |
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38 |
char **pyargv; |
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39 |
WIN32_FIND_DATA fdata; |
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40 |
HANDLE hfind; |
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41 |
const char *err; |
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HMODULE pydll; |
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void (__cdecl *Py_SetPythonHome)(char *home); |
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44 |
int (__cdecl *Py_Main)(int argc, char *argv[]); |
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|
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46 |
if (GetModuleFileName(NULL, pyscript, sizeof(pyscript)) == 0) |
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47 |
{ |
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48 |
err = "GetModuleFileName failed"; |
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49 |
goto bail; |
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50 |
} |
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51 |
|
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52 |
p = strrchr(pyscript, '.'); |
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53 |
if (p == NULL) { |
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54 |
err = "malformed module filename"; |
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55 |
goto bail; |
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56 |
} |
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57 |
*p = 0; /* cut trailing ".exe" */ |
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58 |
strcpy_s(pyhome, sizeof(pyhome), pyscript); |
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59 |
|
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60 |
hfind = FindFirstFile(pyscript, &fdata); |
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61 |
if (hfind != INVALID_HANDLE_VALUE) { |
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62 |
/* pyscript exists, close handle */ |
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63 |
FindClose(hfind); |
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64 |
} else { |
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65 |
/* file pyscript isn't there, take <pyscript>exe.py */ |
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66 |
strcat_s(pyscript, sizeof(pyscript), "exe.py"); |
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67 |
} |
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68 |
|
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69 |
pydll = NULL; |
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70 |
if (GetEnvironmentVariable("PYTHONHOME", envpyhome, |
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71 |
sizeof(envpyhome)) == 0) |
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72 |
{ |
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73 |
/* environment var PYTHONHOME is not set */ |
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74 |
|
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75 |
p = strrchr(pyhome, '\\'); |
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76 |
if (p == NULL) { |
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77 |
err = "can't find backslash in module filename"; |
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78 |
goto bail; |
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79 |
} |
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80 |
*p = 0; /* cut at directory */ |
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81 |
|
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82 |
/* check for private Python of HackableMercurial */ |
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83 |
strcat_s(pyhome, sizeof(pyhome), "\\hg-python"); |
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84 |
|
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85 |
hfind = FindFirstFile(pyhome, &fdata); |
93d97a212559
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86 |
if (hfind != INVALID_HANDLE_VALUE) { |
93d97a212559
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87 |
/* path pyhome exists, let's use it */ |
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88 |
FindClose(hfind); |
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89 |
strcpy_s(pydllfile, sizeof(pydllfile), pyhome); |
93d97a212559
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|
90 |
strcat_s(pydllfile, sizeof(pydllfile), "\\" HGPYTHONLIB); |
93d97a212559
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|
91 |
pydll = LoadLibrary(pydllfile); |
93d97a212559
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92 |
if (pydll == NULL) { |
93d97a212559
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|
93 |
err = "failed to load private Python DLL"; |
93d97a212559
exewrapper: adapt for legacy HackableMercurial
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|
94 |
goto bail; |
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|
95 |
} |
93d97a212559
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|
96 |
Py_SetPythonHome = (void*)GetProcAddress(pydll, |
93d97a212559
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|
97 |
"Py_SetPythonHome"); |
93d97a212559
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|
98 |
if (Py_SetPythonHome == NULL) { |
93d97a212559
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|
99 |
err = "failed to get Py_SetPythonHome"; |
93d97a212559
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Adrian Buehlmann <adrian@cadifra.com>
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|
100 |
goto bail; |
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|
101 |
} |
93d97a212559
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|
102 |
Py_SetPythonHome(pyhome); |
93d97a212559
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|
103 |
} |
93d97a212559
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|
104 |
} |
93d97a212559
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|
105 |
|
93d97a212559
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Adrian Buehlmann <adrian@cadifra.com>
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|
106 |
if (pydll == NULL) { |
93d97a212559
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Adrian Buehlmann <adrian@cadifra.com>
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|
107 |
pydll = LoadLibrary(HGPYTHONLIB); |
93d97a212559
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|
108 |
if (pydll == NULL) { |
93d97a212559
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|
109 |
err = "failed to load Python DLL"; |
93d97a212559
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|
110 |
goto bail; |
93d97a212559
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Adrian Buehlmann <adrian@cadifra.com>
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|
111 |
} |
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|
112 |
} |
93d97a212559
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Adrian Buehlmann <adrian@cadifra.com>
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|
113 |
|
93d97a212559
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Adrian Buehlmann <adrian@cadifra.com>
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114 |
Py_Main = (void*)GetProcAddress(pydll, "Py_Main"); |
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115 |
if (Py_Main == NULL) { |
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116 |
err = "failed to get Py_Main"; |
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117 |
goto bail; |
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118 |
} |
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119 |
|
17058
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120 |
/* |
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121 |
Only add the pyscript to the args, if it's not already there. It may |
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122 |
already be there, if the script spawned a child process of itself, in |
17058
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123 |
the same way as it got called, that is, with the pyscript already in |
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124 |
place. So we optionally accept the pyscript as the first argument |
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125 |
(argv[1]), letting our exe taking the role of the python interpreter. |
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126 |
*/ |
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127 |
if (argc >= 2 && strcmp(argv[1], pyscript) == 0) { |
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128 |
/* |
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129 |
pyscript is already in the args, so there is no need to copy |
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130 |
the args and we can directly call the python interpreter with |
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131 |
the original args. |
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132 |
*/ |
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133 |
return Py_Main(argc, argv); |
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134 |
} |
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|
135 |
|
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|
136 |
/* |
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|
137 |
Start assembling the args for the Python interpreter call. We put the |
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|
138 |
name of our exe (argv[0]) in the position where the python.exe |
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139 |
canonically is, and insert the pyscript next. |
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|
140 |
*/ |
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141 |
pyargv = malloc((argc + 5) * sizeof(char*)); |
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|
142 |
if (pyargv == NULL) { |
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|
143 |
err = "not enough memory"; |
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|
144 |
goto bail; |
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|
145 |
} |
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Adrian Buehlmann <adrian@cadifra.com>
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|
146 |
n = 0; |
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|
147 |
pyargv[n++] = argv[0]; |
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|
148 |
pyargv[n++] = pyscript; |
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|
149 |
|
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|
150 |
/* copy remaining args from the command line */ |
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|
151 |
for (i = 1; i < argc; i++) |
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|
152 |
pyargv[n++] = argv[i]; |
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Adrian Buehlmann <adrian@cadifra.com>
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diff
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|
153 |
/* argv[argc] is guaranteed to be NULL, so we forward that guarantee */ |
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Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
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|
154 |
pyargv[n] = NULL; |
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parents:
diff
changeset
|
155 |
|
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|
156 |
ret = Py_Main(n, pyargv); /* The Python interpreter call */ |
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Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
changeset
|
157 |
|
d5422faf648c
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Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
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|
158 |
free(pyargv); |
d5422faf648c
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Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
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|
159 |
return ret; |
d5422faf648c
exewrapper: adding new exewrapper.c
Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
changeset
|
160 |
|
d5422faf648c
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Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
changeset
|
161 |
bail: |
d5422faf648c
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Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
changeset
|
162 |
fprintf(stderr, "abort: %s\n", err); |
d5422faf648c
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Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
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|
163 |
return 255; |
d5422faf648c
exewrapper: adding new exewrapper.c
Adrian Buehlmann <adrian@cadifra.com>
parents:
diff
changeset
|
164 |
} |