Annotation of parser3/src/main/pa_exec.C, revision 1.51
1.1 paf 1: /** @file
2: Parser: program executing for different OS-es.
3:
1.51 ! paf 4: Copyright(c) 2000,2001-2003 ArtLebedev Group(http://www.artlebedev.com)
1.25 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6:
1.18 paf 7: @todo setrlimit
1.1 paf 8: */
1.38 paf 9:
1.51 ! paf 10: static const char* IDENT_EXEC_C="$Date: 2003/07/22 08:19:58 $";
1.1 paf 11:
12: #include "pa_config_includes.h"
13:
1.19 paf 14: #include "pa_exec.h"
15: #include "pa_exception.h"
16: #include "pa_common.h"
17:
1.1 paf 18: #ifdef WIN32
19: # include <windows.h>
20: #else
21: # include <signal.h>
22: # include <sys/types.h>
23: # include <sys/wait.h>
24: #endif
25:
26: #ifdef WIN32
27:
28: /// this func from http://www.ccas.ru/~posp/popov/spawn.htm
1.36 paf 29: static DWORD CreateHiddenConsoleProcess(LPCTSTR szCmdLine,
1.51 ! paf 30: char *szEnv,
1.1 paf 31: PROCESS_INFORMATION* ppi,
32: LPHANDLE phInWrite,
33: LPHANDLE phOutRead,
1.9 parser 34: LPHANDLE phErrRead)
1.1 paf 35: {
1.51 ! paf 36: DWORD result=0;
1.36 paf 37: BOOL fCreated;
1.51 ! paf 38: STARTUPINFO si;
! 39: SECURITY_ATTRIBUTES sa={0};
! 40: HANDLE hInRead;
! 41: HANDLE hOutWrite;
! 42: HANDLE hErrWrite;
! 43:
! 44: // Create pipes
! 45: // initialize security attributes for handle inheritance (for WinNT)
! 46: sa.nLength=sizeof(sa);
! 47: sa.bInheritHandle=TRUE;
! 48: sa.lpSecurityDescriptor=NULL;
! 49:
! 50: // create STDIN pipe
! 51: if(!CreatePipe(&hInRead, phInWrite, &sa, 0))
! 52: goto error;
! 53:
! 54: // create STDOUT pipe
! 55: if(!CreatePipe(phOutRead, &hOutWrite, &sa, 0))
! 56: goto error;
! 57:
! 58: // create STDERR pipe
! 59: if(!CreatePipe(phErrRead, &hErrWrite, &sa, 0))
! 60: goto error;
! 61:
! 62: // process startup information
! 63: memset(&si, 0, sizeof(si));
! 64: si.cb=sizeof(si);
! 65: si.dwFlags=STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
! 66: // child process' console must be hidden for Win95 compatibility
! 67: si.wShowWindow=SW_HIDE;
! 68: // assign "other" sides of pipes
! 69: si.hStdInput=hInRead;
! 70: si.hStdOutput=hOutWrite;
! 71: si.hStdError=hErrWrite;
! 72:
1.31 paf 73: // calculating script's directory
74: char dir[MAX_STRING];
75: strncpy(dir, szCmdLine, MAX_STRING-1); dir[MAX_STRING-1]=0;
1.33 paf 76: lsplit(dir,' '); // trim arguments
1.31 paf 77: rsplit(dir,'/'); rsplit(dir,'\\'); // trim filename
78: chdir(dir);
1.51 ! paf 79:
! 80: // Create a child process (suspended)
! 81: fCreated=CreateProcess(NULL,
! 82: (LPTSTR)szCmdLine,
! 83: NULL,
! 84: NULL,
! 85: TRUE,
! 86: CREATE_NO_WINDOW,
! 87: szEnv,
! 88: dir,
! 89: &si,
! 90: ppi);
1.36 paf 91: if(!fCreated)
92: result=GetLastError();
1.51 ! paf 93:
! 94: CloseHandle(hInRead);
! 95: CloseHandle(hOutWrite);
! 96: CloseHandle(hErrWrite);
! 97:
! 98: if(!fCreated)
! 99: goto error;
! 100:
! 101: return result;
! 102:
1.1 paf 103: error:
1.36 paf 104: if(!result/*yet*/)
105: result=GetLastError(); // get it
1.51 ! paf 106:
! 107: CloseHandle(*phInWrite);
! 108: CloseHandle(*phOutRead);
! 109: CloseHandle(*phErrRead);
! 110:
! 111: return result;
! 112: }
1.36 paf 113:
1.51 ! paf 114: static void read_pipe(String& result, HANDLE hOutRead, String::Language lang){
! 115: while(true) {
! 116: char *buf=new(PointerFreeGC) char[MAX_STRING];
! 117: unsigned long size;
! 118: if(!ReadFile(hOutRead, buf, MAX_STRING-1, &size, NULL) || !size)
! 119: break;
! 120: buf[size]=0;
! 121: result.append_know_length(buf, size, lang);
! 122: }
1.1 paf 123: }
124:
1.51 ! paf 125: static const char* buildCommand(const char* file_spec_cstr, const ArrayString& argv) {
! 126: const char* result=file_spec_cstr;
1.4 paf 127: if(FILE *f=fopen(file_spec_cstr, "r")) {
1.51 ! paf 128: try {
1.1 paf 129: char buf[MAX_STRING];
130: size_t size=fread(buf, 1, MAX_STRING-1, f);
131: if(size>2) {
132: buf[size]=0;
133: if(strncmp(buf, "#!", 2)==0) {
1.51 ! paf 134: const char* begin=buf+2;
1.4 paf 135: if(*begin==' ') // alx: were an old magic for some linux-es
136: begin++;
137: if(char *end=strchr(begin, '\n')) {
1.51 ! paf 138: String string(pa_strdup(begin, end-begin));
1.1 paf 139: string << " " << file_spec_cstr;
1.8 parser 140: result=string.cstr();
1.1 paf 141: }
142: }
143: }
1.51 ! paf 144: } catch(...) {
! 145: fclose(f);
! 146: rethrow;
! 147: }
1.1 paf 148: fclose(f);
149: }
1.51 ! paf 150: { // appending argv
! 151: String string(result);
! 152: for(size_t i=0; i<argv.count(); i++) {
! 153: string << " ";
! 154: string << *argv[i];
1.8 parser 155: }
156:
1.51 ! paf 157: result=string.cstr();
1.8 parser 158: }
159:
160: return result;
1.1 paf 161: }
162:
1.51 ! paf 163: #else
1.1 paf 164:
1.51 ! paf 165: static pid_t execve_piped(const char* file_spec_cstr,
1.27 paf 166: char * const argv[], char * const env[],
167: int *pipe_in, int *pipe_out, int *pipe_err) {
1.46 paf 168: pid_t pid;
1.1 paf 169: int in_fds[2];
170: int out_fds[2];
171: int err_fds[2];
172: int save_errno;
173:
174: if(pipe_in && pipe(in_fds)<0) {
175: save_errno=errno;
176: errno=save_errno;
177: return 0;
178: }
179:
180: if(pipe_out && pipe(out_fds)<0) {
181: save_errno=errno;
182: if(pipe_in) {
183: close(in_fds[0]); close(in_fds[1]);
184: }
185: errno=save_errno;
186: return 0;
187: }
188:
189: if(pipe_err && pipe(err_fds)<0) {
190: save_errno=errno;
191: if(pipe_in) {
192: close(in_fds[0]); close(in_fds[1]);
193: }
194: if(pipe_out) {
195: close(out_fds[0]); close(out_fds[1]);
196: }
197: errno=save_errno;
198: return 0;
199: }
200:
201: if((pid=fork())<0) {
202: save_errno=errno;
203: if(pipe_in) {
204: close(in_fds[0]); close(in_fds[1]);
205: }
206: if(pipe_out) {
207: close(out_fds[0]); close(out_fds[1]);
208: }
209: if(pipe_err) {
210: close(err_fds[0]); close(err_fds[1]);
211: }
212: errno=save_errno;
1.46 paf 213: return -1;
1.1 paf 214: }
215:
216: if(!pid) {
217: /* Child process */
218:
219: if(pipe_out) {
220: close(out_fds[0]);
221: dup2(out_fds[1], STDOUT_FILENO);
222: close(out_fds[1]);
223: }
224:
225: if(pipe_in) {
226: close(in_fds[1]);
227: dup2(in_fds[0], STDIN_FILENO);
228: close(in_fds[0]);
229: }
230:
231: if(pipe_err) {
232: close(err_fds[0]);
233: dup2(err_fds[1], STDERR_FILENO);
234: close(err_fds[1]);
235: }
236:
1.42 paf 237: /* grabbed this from Apache source: */
238: /* HP-UX SIGCHLD fix goes here, if someone will remind me what it is... */
1.1 paf 239: signal(SIGCHLD, SIG_DFL); /* Was that it? */
240:
1.31 paf 241: // chdir to script's directory
242: char dir[MAX_STRING];
243: strncpy(dir, file_spec_cstr, MAX_STRING-1); dir[MAX_STRING-1]=0;
244: rsplit(dir,'/'); // trim filename
245: chdir(dir);
246:
247: // execute
248: execve(file_spec_cstr, argv, env);
1.1 paf 249: exit(-errno);
250: }
251:
252: /* Parent process */
253:
254: if(pipe_out) {
255: close(out_fds[1]);
256: *pipe_out=out_fds[0];
257: }
258:
259: if(pipe_in) {
260: close(in_fds[0]);
261: *pipe_in=in_fds[1];
262: }
263:
264: if(pipe_err) {
265: close(err_fds[1]);
266: *pipe_err=err_fds[0];
267: }
268:
269: return pid;
270: }
271:
272: static int get_exit_status(int pid) {
273: int status;
274: if(!waitpid(pid, &status, 0))
275: return -1;
276: return WIFEXITED(status) ?
277: WEXITSTATUS(status) : -2;
278: }
279:
1.51 ! paf 280: static void read_pipe(String& result, int file, String::Language lang){
1.1 paf 281: while(true) {
1.51 ! paf 282: char *buf=new(PointerFreeGC) char[MAX_STRING];
! 283: ssize_t length=read(file, buf, MAX_STRING-1);
! 284: if(length<=0)
1.49 paf 285: break;
1.51 ! paf 286: buf[length]=0;
! 287: result.append_know_length(buf, length, lang);
! 288: }
1.1 paf 289: }
290:
1.51 ! paf 291: #endif
1.1 paf 292:
1.51 ! paf 293: #ifndef DOXYGEN
! 294: struct Append_env_pair_info {
1.1 paf 295: #ifdef WIN32
1.51 ! paf 296: String& string;
! 297: Append_env_pair_info(String& astring): string(astring) {}
! 298: #else
! 299: char **env_ref;
! 300: #endif
! 301: };
! 302: #endif
! 303: ///@test maybe here and at argv construction --- cstr(String::L_UNSPECIFIED
! 304: static void append_env_pair(HashStringString::key_type key, HashStringString::value_type value,
! 305: Append_env_pair_info *info) {
! 306: #ifdef WIN32
! 307: info->string << key << "=" << value;
! 308: info->string.append_know_length("\1", 1, String::L_AS_IS); // placeholder for of zero byte
1.1 paf 309: #else
1.51 ! paf 310: StringBody body;
! 311: body << key << "=" << value;
1.1 paf 312:
1.51 ! paf 313: *(info->env_ref++)=body.cstrm();
1.1 paf 314: #endif
315: }
1.31 paf 316:
1.51 ! paf 317: /// @todonow unix part to smart_ptr
! 318: PA_exec_result pa_exec(
! 319: bool forced_allow,
1.32 paf 320: const String& file_spec,
1.51 ! paf 321: const HashStringString* env,
! 322: const ArrayString& argv,
! 323: String& in) {
! 324: PA_exec_result result;
1.1 paf 325:
1.28 paf 326: #ifdef NO_PA_EXECS
1.32 paf 327: if(!forced_allow)
1.34 paf 328: throw Exception("parser.runtime",
1.32 paf 329: &file_spec,
330: "parser execs are disabled [recompile parser without --disable-execs configure option]");
331: #endif
1.28 paf 332:
1.51 ! paf 333: // execve needs non const
! 334: char* file_spec_cstr=file_spec.cstrm(String::L_FILE_SPEC);
1.1 paf 335: #ifdef WIN32
336:
337: PROCESS_INFORMATION pi;
338: HANDLE hInWrite, hOutRead, hErrRead;
1.51 ! paf 339: const char* cmd=buildCommand(file_spec.cstr(String::L_FILE_SPEC), argv);
! 340: char* env_cstr;
1.1 paf 341: if(env) {
1.51 ! paf 342: String string;
! 343: Append_env_pair_info info(string);
! 344: env->for_each(append_env_pair, &info);
! 345: env_cstr=info.string.cstrm(String::L_UNSPECIFIED);
! 346: for(char* replacer=env_cstr; *replacer; replacer++)
! 347: if(*replacer=='\1')
! 348: *replacer=0;
1.1 paf 349: }
1.36 paf 350: if(DWORD error=CreateHiddenConsoleProcess(cmd, env_cstr, &pi, &hInWrite, &hOutRead, &hErrRead)) {
351: char szErrorDesc[MAX_STRING];
1.51 ! paf 352: const char* param="the file you tried to run";
1.36 paf 353: size_t error_size=FormatMessage(
354: FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_ARGUMENT_ARRAY , NULL, error,
355: MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL),
1.51 ! paf 356: szErrorDesc, sizeof(szErrorDesc), (va_list *)¶m);
1.36 paf 357: if(error_size>3) // ".\r\n"
358: szErrorDesc[error_size-3]=0;
359:
360: throw Exception(0,
361: &file_spec,
362: "exec failed - %s (%ld). Consider adding shbang line (#!x:\\interpreter\\command line)",
363: error_size?szErrorDesc:"<unknown>", (long)error);
364: } else {
1.51 ! paf 365: const char* in_cstr=in.cstr();
1.5 paf 366: DWORD written_size;
1.51 ! paf 367: WriteFile(hInWrite, in_cstr, in.length(), &written_size, NULL);
1.5 paf 368: // EOF for stupid text reads
369: // normally they should read CONTENT_LENGTH bytes,
370: // without this char
371: WriteFile(hInWrite, "\x1A", 1, &written_size, NULL);
1.9 parser 372: CloseHandle(hInWrite);
1.51 ! paf 373: read_pipe(result.out, hOutRead, String::L_AS_IS);
1.9 parser 374: CloseHandle(hOutRead);
1.51 ! paf 375: read_pipe(result.err, hErrRead, String::L_TAINTED);
1.9 parser 376: CloseHandle(hErrRead);
1.1 paf 377: /*
378: from http://www.apache.org/websrc/cvsweb.cgi/apache-1.3/src/main/util_script.c?rev=1.151&content-type=text/vnd.viewcvs-markup
379:
380: * We must close the handles to the new process and its main thread
381: * to prevent handle and memory leaks.
382: */
383: CloseHandle(pi.hProcess);
384: CloseHandle(pi.hThread);
385: }
386:
387: #else
388:
389: int pipe_write, pipe_read, pipe_err;
1.31 paf 390:
1.47 paf 391: #ifdef PA_SAFE_MODE
1.32 paf 392: if(!forced_allow) {
393: struct stat finfo;
394: if(stat(file_spec_cstr, &finfo)!=0)
1.34 paf 395: throw Exception("file.missing",
1.51 ! paf 396: &file_spec,
! 397: "stat failed: %s (%d), actual filename '%s'",
! 398: strerror(errno), errno, file_spec_cstr);
1.31 paf 399:
1.50 paf 400: check_safe_mode(finfo, file_spec, file_spec_cstr);
1.32 paf 401: }
1.31 paf 402: #endif
403:
1.51 ! paf 404: char* argv_cstrs[1+10+1]={file_spec_cstr, 0};
! 405: const int argv_size=argv.count();
! 406: const int argv_max=sizeof(argv_cstrs)/sizeof(argv_cstrs[0])-1-1;
! 407: if(argv_size>argv_max)
! 408: throw Exception("parser.runtime",
! 409: &file_spec,
! 410: "too many arguments (%d > max %d)", argv_size, argv_max);
! 411: for(int i=0; i<argv_size; i++)
! 412: argv_cstrs[1+i]=argv[i]->cstrm();
! 413: argv_cstrs[1+argv_size]=0;
! 414:
! 415: char **env_cstrs;
1.1 paf 416: if(env) {
1.51 ! paf 417: env_cstrs=new(PointerFreeGC) char *[env->count()+1/*0*/];
! 418: Append_env_pair_info info={env_cstrs};
! 419: env->for_each(append_env_pair, &info);
! 420: *info.env_ref=0;
! 421: } else
! 422: env_cstrs=0;
1.31 paf 423:
1.46 paf 424: pid_t pid=execve_piped(
1.1 paf 425: file_spec_cstr,
1.27 paf 426: argv_cstrs, env_cstrs,
1.22 paf 427: &pipe_write, &pipe_read, &pipe_err);
1.46 paf 428: if(pid>0) {
1.21 paf 429: // in child
1.51 ! paf 430: if(in.length()) {// there is some in data
! 431: const char* in_cstr=in.cstr();
! 432: write(pipe_write, in_cstr, in.length());
! 433: }
1.1 paf 434: close(pipe_write);
1.51 ! paf 435: read_pipe(result.out, pipe_read, String::L_AS_IS);
1.5 paf 436: close(pipe_read);
1.51 ! paf 437: read_pipe(result.err, pipe_err, String::L_TAINTED);
1.1 paf 438: close(pipe_err);
439:
1.51 ! paf 440: result.status=get_exit_status(pid); // negative may mean "-errno[execl()]"
1.1 paf 441: } else
1.34 paf 442: throw Exception(0,
1.2 paf 443: &file_spec,
1.46 paf 444: "%s error: %s (%d)", pid<0?"fork":"pipe", strerror(errno), errno);
1.1 paf 445: #endif
446:
1.51 ! paf 447: return result;
1.1 paf 448: }
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