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1899
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1 /*
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2 Copyright (C) Andrew Tridgell 2002
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software
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16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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17 */
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18
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19 #include "ccache.h"
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20
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21 #ifdef _WIN32
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22 char *argvtos(char **argv)
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23 {
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24 int i, len;
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25 char *ptr, *str;
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26
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27 for (i = 0, len = 0; argv[i]; i++) {
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28 len += strlen(argv[i]) + 3;
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29 }
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30
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31 str = ptr = (char *)malloc(len + 1);
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32 if (str == NULL)
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33 return NULL;
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34
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35 for (i = 0; argv[i]; i++) {
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36 len = strlen(argv[i]);
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37 *ptr++ = '"';
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38 memcpy(ptr, argv[i], len);
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39 ptr += len;
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40 *ptr++ = '"';
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41 *ptr++ = ' ';
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42 }
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43 *ptr = 0;
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44
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45 return str;
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46 }
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47 #endif
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48
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49 /*
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50 execute a compiler backend, capturing all output to the given paths
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51 the full path to the compiler to run is in argv[0]
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52 */
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53 int execute(char **argv,
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54 const char *path_stdout,
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55 const char *path_stderr)
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56 {
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57 #ifdef _WIN32
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58
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59 #if 1
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60 PROCESS_INFORMATION pinfo;
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61 STARTUPINFO sinfo;
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62 BOOL ret;
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63 DWORD exitcode;
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64 char *args;
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65 HANDLE fd_out, fd_err;
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66 SECURITY_ATTRIBUTES sa = {sizeof(SECURITY_ATTRIBUTES), NULL, TRUE};
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67
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68 /* TODO: needs moving after possible exit() below, but before stdout is redirected */
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69 if (ccache_verbose) {
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70 display_execute_args(argv);
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71 }
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72
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73 fd_out = CreateFile(path_stdout, GENERIC_WRITE, 0, &sa, CREATE_ALWAYS,
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74 FILE_ATTRIBUTE_NORMAL, NULL);
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75 if (fd_out == INVALID_HANDLE_VALUE) {
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76 return STATUS_NOCACHE;
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77 }
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78
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79 fd_err = CreateFile(path_stderr, GENERIC_WRITE, 0, &sa, CREATE_ALWAYS,
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80 FILE_ATTRIBUTE_NORMAL, NULL);
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81 if (fd_err == INVALID_HANDLE_VALUE) {
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82 return STATUS_NOCACHE;
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83 }
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84
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85 ZeroMemory(&pinfo, sizeof(PROCESS_INFORMATION));
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86 ZeroMemory(&sinfo, sizeof(STARTUPINFO));
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87
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88 sinfo.cb = sizeof(STARTUPINFO);
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89 sinfo.hStdError = fd_err;
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90 sinfo.hStdOutput = fd_out;
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91 sinfo.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
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92 sinfo.dwFlags |= STARTF_USESTDHANDLES;
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93
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94 args = argvtos(argv);
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95
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96 ret = CreateProcessA(argv[0], args, NULL, NULL, TRUE, 0, NULL, NULL,
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97 &sinfo, &pinfo);
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98
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99 free(args);
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100 CloseHandle(fd_out);
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101 CloseHandle(fd_err);
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102
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103 if (ret == 0)
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104 return -1;
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105
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106 WaitForSingleObject(pinfo.hProcess, INFINITE);
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107 GetExitCodeProcess(pinfo.hProcess, &exitcode);
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108 CloseHandle(pinfo.hProcess);
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109 CloseHandle(pinfo.hThread);
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110
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111 return exitcode;
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112 #else /* possibly slightly faster */
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113 /* needs fixing to quote commandline options to handle spaces in CCACHE_DIR etc */
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114 int status = -2;
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115 int fd, std_od = -1, std_ed = -1;
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116
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117 /* TODO: needs moving after possible exit() below, but before stdout is redirected */
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118 if (ccache_verbose) {
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119 display_execute_args(argv);
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120 }
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121
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122 unlink(path_stdout);
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123 std_od = _dup(1);
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124 fd = _open(path_stdout, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL|O_BINARY, 0666);
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125 if (fd == -1) {
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126 exit(STATUS_NOCACHE);
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127 }
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128 _dup2(fd, 1);
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129 _close(fd);
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130
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131 unlink(path_stderr);
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132 fd = _open(path_stderr, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL|O_BINARY, 0666);
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133 std_ed = _dup(2);
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134 if (fd == -1) {
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135 exit(STATUS_NOCACHE);
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136 }
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137 _dup2(fd, 2);
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138 _close(fd);
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139
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140 /* Spawn process (_exec* familly doesn't return) */
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141 status = _spawnv(_P_WAIT, argv[0], (const char **)argv);
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142
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143 /* Restore descriptors */
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144 if (std_od != -1) _dup2(std_od, 1);
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145 if (std_ed != -1) _dup2(std_ed, 2);
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146 _flushall();
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147
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148 return (status>0);
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149
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150 #endif
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151
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152 #else
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153 pid_t pid;
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154 int status;
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155
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156 pid = fork();
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157 if (pid == -1) fatal("Failed to fork");
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158
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159 if (pid == 0) {
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160 int fd;
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161
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162 /* TODO: needs moving after possible exit() below, but before stdout is redirected */
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163 if (ccache_verbose) {
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164 display_execute_args(argv);
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165 }
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166
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167 unlink(path_stdout);
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168 fd = open(path_stdout, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL|O_BINARY, 0666);
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169 if (fd == -1) {
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170 exit(STATUS_NOCACHE);
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171 }
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172 dup2(fd, 1);
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173 close(fd);
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174
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175 unlink(path_stderr);
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176 fd = open(path_stderr, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL|O_BINARY, 0666);
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177 if (fd == -1) {
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178 exit(STATUS_NOCACHE);
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179 }
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180 dup2(fd, 2);
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181 close(fd);
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182
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183 exit(execv(argv[0], argv));
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184 }
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185
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186 if (waitpid(pid, &status, 0) != pid) {
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187 fatal("waitpid failed");
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188 }
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189
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190 if (WEXITSTATUS(status) == 0 && WIFSIGNALED(status)) {
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191 return -1;
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192 }
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193
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194 return WEXITSTATUS(status);
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195 #endif
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196 }
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197
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198
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199 /*
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200 find an executable by name in $PATH. Exclude any that are links to exclude_name
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201 */
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202 char *find_executable(const char *name, const char *exclude_name)
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203 {
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204 #if _WIN32
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205 (void)exclude_name;
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206 DWORD ret;
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207 char namebuf[MAX_PATH];
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208
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209 ret = SearchPathA(getenv("CCACHE_PATH"), name, ".exe",
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210 sizeof(namebuf), namebuf, NULL);
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211 if (ret != 0) {
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212 return x_strdup(namebuf);
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213 }
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214
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215 return NULL;
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216 #else
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217 char *path;
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218 char *tok;
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219 struct stat st1, st2;
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220
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221 if (*name == '/') {
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222 return x_strdup(name);
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223 }
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224
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225 path = getenv("CCACHE_PATH");
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226 if (!path) {
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227 path = getenv("PATH");
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228 }
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229 if (!path) {
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230 cc_log("no PATH variable!?\n");
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231 stats_update(STATS_ENVIRONMMENT);
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232 return NULL;
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233 }
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234
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235 path = x_strdup(path);
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236
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237 /* search the path looking for the first compiler of the right name
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238 that isn't us */
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239 for (tok=strtok(path,":"); tok; tok = strtok(NULL, ":")) {
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240 char *fname;
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241 x_asprintf(&fname, "%s/%s", tok, name);
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242 /* look for a normal executable file */
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243 if (access(fname, X_OK) == 0 &&
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244 lstat(fname, &st1) == 0 &&
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245 stat(fname, &st2) == 0 &&
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246 S_ISREG(st2.st_mode)) {
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247 /* if its a symlink then ensure it doesn't
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248 point at something called exclude_name */
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249 if (S_ISLNK(st1.st_mode)) {
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250 char *buf = x_realpath(fname);
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251 if (buf) {
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252 char *p = str_basename(buf);
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253 if (strcmp(p, exclude_name) == 0) {
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254 /* its a link to "ccache" ! */
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255 free(p);
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256 free(buf);
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257 continue;
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258 }
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259 free(buf);
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260 free(p);
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261 }
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262 }
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263
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264 /* found it! */
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265 free(path);
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266 return fname;
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267 }
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268 free(fname);
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269 }
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270
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271 return NULL;
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272 #endif
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273 }
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274
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275 void display_execute_args(char **argv)
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276 {
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277 if (argv) {
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278 printf("ccache executing: ");
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279 while (*argv) {
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280 printf("%s ", *argv);
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281 ++argv;
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282 }
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283 printf("\n");
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284 fflush(stdout);
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285 }
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286 }
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