annotate mercurial/exewrapper.c @ 36280:685bcdd236b5

wireprotoserver: py3 helpfully calls adds HTTP_ to CONTENT_LENGTH Just handle both with a membership check, preferring the HTTP_ namespaced version. Sigh. Differential Revision: https://phab.mercurial-scm.org/D2310
author Augie Fackler <augie@google.com>
date Sun, 18 Feb 2018 00:02:33 -0500
parents 31c6c4d27be7
children aca727359ec5
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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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9
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10 #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 }
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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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26 static char pyscript[MAX_PATH + 10];
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27 static char pyhome[MAX_PATH + 10];
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28 static char envpyhome[MAX_PATH + 10];
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29 static char pydllfile[MAX_PATH + 10];
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30
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31 int main(int argc, char *argv[])
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32 {
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33 char *p;
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34 int ret;
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35 int i;
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36 int n;
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37 char **pyargv;
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38 WIN32_FIND_DATA fdata;
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39 HANDLE hfind;
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40 const char *err;
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41 HMODULE pydll;
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42 void(__cdecl * Py_SetPythonHome)(char *home);
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43 int(__cdecl * Py_Main)(int argc, char *argv[]);
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44
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45 if (GetModuleFileName(NULL, pyscript, sizeof(pyscript)) == 0) {
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46 err = "GetModuleFileName failed";
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47 goto bail;
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48 }
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49
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50 p = strrchr(pyscript, '.');
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51 if (p == NULL) {
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52 err = "malformed module filename";
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53 goto bail;
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54 }
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55 *p = 0; /* cut trailing ".exe" */
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56 strcpy_s(pyhome, sizeof(pyhome), pyscript);
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57
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58 hfind = FindFirstFile(pyscript, &fdata);
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59 if (hfind != INVALID_HANDLE_VALUE) {
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60 /* pyscript exists, close handle */
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61 FindClose(hfind);
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62 } else {
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63 /* file pyscript isn't there, take <pyscript>exe.py */
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64 strcat_s(pyscript, sizeof(pyscript), "exe.py");
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65 }
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66
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67 pydll = NULL;
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68
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69 p = strrchr(pyhome, '\\');
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70 if (p == NULL) {
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71 err = "can't find backslash in module filename";
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72 goto bail;
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73 }
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Kostia Balytskyi <ikostia@fb.com>
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74 *p = 0; /* cut at directory */
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75
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76 /* check for private Python of HackableMercurial */
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Kostia Balytskyi <ikostia@fb.com>
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77 strcat_s(pyhome, sizeof(pyhome), "\\hg-python");
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78
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79 hfind = FindFirstFile(pyhome, &fdata);
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80 if (hfind != INVALID_HANDLE_VALUE) {
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Kostia Balytskyi <ikostia@fb.com>
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81 /* Path .\hg-python exists. We are probably in HackableMercurial
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82 scenario, so let's load python dll from this dir. */
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Kostia Balytskyi <ikostia@fb.com>
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83 FindClose(hfind);
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Kostia Balytskyi <ikostia@fb.com>
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84 strcpy_s(pydllfile, sizeof(pydllfile), pyhome);
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Kostia Balytskyi <ikostia@fb.com>
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85 strcat_s(pydllfile, sizeof(pydllfile), "\\" HGPYTHONLIB ".dll");
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Kostia Balytskyi <ikostia@fb.com>
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86 pydll = LoadLibrary(pydllfile);
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Kostia Balytskyi <ikostia@fb.com>
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87 if (pydll == NULL) {
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Augie Fackler <augie@google.com>
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88 err = "failed to load private Python DLL " HGPYTHONLIB
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89 ".dll";
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90 goto bail;
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91 }
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Augie Fackler <augie@google.com>
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92 Py_SetPythonHome =
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93 (void *)GetProcAddress(pydll, "Py_SetPythonHome");
31443
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Kostia Balytskyi <ikostia@fb.com>
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94 if (Py_SetPythonHome == NULL) {
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Kostia Balytskyi <ikostia@fb.com>
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95 err = "failed to get Py_SetPythonHome";
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96 goto bail;
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97 }
31443
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98 Py_SetPythonHome(pyhome);
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99 }
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100
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101 if (pydll == NULL) {
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Gregory Szorc <gregory.szorc@gmail.com>
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102 pydll = LoadLibrary(HGPYTHONLIB ".dll");
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103 if (pydll == NULL) {
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104 err = "failed to load Python DLL " HGPYTHONLIB ".dll";
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105 goto bail;
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106 }
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107 }
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108
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109 Py_Main = (void *)GetProcAddress(pydll, "Py_Main");
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110 if (Py_Main == NULL) {
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111 err = "failed to get Py_Main";
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112 goto bail;
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113 }
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114
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115 /*
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116 Only add the pyscript to the args, if it's not already there. It may
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117 already be there, if the script spawned a child process of itself, in
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118 the same way as it got called, that is, with the pyscript already in
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119 place. So we optionally accept the pyscript as the first argument
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120 (argv[1]), letting our exe taking the role of the python interpreter.
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121 */
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122 if (argc >= 2 && strcmp(argv[1], pyscript) == 0) {
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123 /*
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124 pyscript is already in the args, so there is no need to copy
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Adrian Buehlmann <adrian@cadifra.com>
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125 the args and we can directly call the python interpreter with
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Adrian Buehlmann <adrian@cadifra.com>
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126 the original args.
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Adrian Buehlmann <adrian@cadifra.com>
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127 */
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128 return Py_Main(argc, argv);
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129 }
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130
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131 /*
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132 Start assembling the args for the Python interpreter call. We put the
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133 name of our exe (argv[0]) in the position where the python.exe
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134 canonically is, and insert the pyscript next.
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135 */
34636
31c6c4d27be7 exewrapper: format with clang-format
Augie Fackler <augie@google.com>
parents: 31443
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136 pyargv = malloc((argc + 5) * sizeof(char *));
17058
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137 if (pyargv == NULL) {
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138 err = "not enough memory";
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139 goto bail;
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Adrian Buehlmann <adrian@cadifra.com>
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140 }
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Adrian Buehlmann <adrian@cadifra.com>
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141 n = 0;
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142 pyargv[n++] = argv[0];
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143 pyargv[n++] = pyscript;
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144
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145 /* copy remaining args from the command line */
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Adrian Buehlmann <adrian@cadifra.com>
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146 for (i = 1; i < argc; i++)
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147 pyargv[n++] = argv[i];
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148 /* argv[argc] is guaranteed to be NULL, so we forward that guarantee */
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149 pyargv[n] = NULL;
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150
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151 ret = Py_Main(n, pyargv); /* The Python interpreter call */
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152
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153 free(pyargv);
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154 return ret;
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Adrian Buehlmann <adrian@cadifra.com>
parents:
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155
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Adrian Buehlmann <adrian@cadifra.com>
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156 bail:
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Adrian Buehlmann <adrian@cadifra.com>
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157 fprintf(stderr, "abort: %s\n", err);
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Adrian Buehlmann <adrian@cadifra.com>
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158 return 255;
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159 }