Annotation of parser3/src/main/pa_exec.C, revision 1.48.2.18.2.7
1.1 paf 1: /** @file
2: Parser: program executing for different OS-es.
3:
1.48.2.5 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:
1.48.2.18.2.7! (paf 10:: static const char* IDENT_EXEC_C="$Date: 2003/03/21 14:49:00 $";
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,
1.1 paf 30: char *szEnv,
31: PROCESS_INFORMATION* ppi,
32: LPHANDLE phInWrite,
33: LPHANDLE phOutRead,
1.9 parser 34: LPHANDLE phErrRead)
1.1 paf 35: {
1.36 paf 36: DWORD result=0;
37: BOOL fCreated;
1.1 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)
1.9 parser 46: sa.nLength=sizeof(sa);
47: sa.bInheritHandle=TRUE;
48: sa.lpSecurityDescriptor=NULL;
1.1 paf 49:
50: // create STDIN pipe
1.9 parser 51: if(!CreatePipe(&hInRead, phInWrite, &sa, 0))
1.1 paf 52: goto error;
53:
54: // create STDOUT pipe
1.9 parser 55: if(!CreatePipe(phOutRead, &hOutWrite, &sa, 0))
1.1 paf 56: goto error;
57:
58: // create STDERR pipe
1.9 parser 59: if(!CreatePipe(phErrRead, &hErrWrite, &sa, 0))
1.1 paf 60: goto error;
61:
62: // process startup information
1.9 parser 63: memset(&si, 0, sizeof(si));
64: si.cb=sizeof(si);
65: si.dwFlags=STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
1.1 paf 66: // child process' console must be hidden for Win95 compatibility
1.9 parser 67: si.wShowWindow=SW_HIDE;
1.1 paf 68: // assign "other" sides of pipes
1.9 parser 69: si.hStdInput=hInRead;
70: si.hStdOutput=hOutWrite;
71: si.hStdError=hErrWrite;
1.1 paf 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);
79:
1.1 paf 80: // Create a child process (suspended)
1.9 parser 81: fCreated=CreateProcess(NULL,
1.26 paf 82: (LPTSTR)szCmdLine,
1.1 paf 83: NULL,
84: NULL,
85: TRUE,
1.30 paf 86: CREATE_NO_WINDOW,
1.1 paf 87: szEnv,
1.31 paf 88: dir,
1.1 paf 89: &si,
1.9 parser 90: ppi);
1.36 paf 91: if(!fCreated)
92: result=GetLastError();
1.1 paf 93:
1.9 parser 94: CloseHandle(hInRead);
95: CloseHandle(hOutWrite);
96: CloseHandle(hErrWrite);
1.1 paf 97:
1.9 parser 98: if(!fCreated)
1.1 paf 99: goto error;
100:
1.36 paf 101: return result;
1.1 paf 102:
103: error:
1.36 paf 104: if(!result/*yet*/)
105: result=GetLastError(); // get it
106:
1.9 parser 107: CloseHandle(*phInWrite);
108: CloseHandle(*phOutRead);
109: CloseHandle(*phErrRead);
1.1 paf 110:
1.36 paf 111: return result;
1.1 paf 112: }
113:
1.48.2.18.2.7! (paf 114:: static void read_pipe(String& result, HANDLE hOutRead, String::Language lang){
1.1 paf 115: while(true) {
1.48.2.18.2.6 (paf 116:: char *buf=new(PointerFreeGC) char[MAX_STRING];
1.1 paf 117: unsigned long size;
1.30 paf 118: if(!ReadFile(hOutRead, buf, MAX_STRING, &size, NULL) || !size)
1.1 paf 119: break;
1.48.2.18.2.6 (paf 120:: result.append(buf, size, lang);
121:: }
1.1 paf 122: }
123:
1.48.2.18.2.1 (paf 124:: static const char* buildCommand(const char* file_spec_cstr, const ArrayString& argv) {
125:: const char* result=file_spec_cstr;
1.4 paf 126: if(FILE *f=fopen(file_spec_cstr, "r")) {
1.48.2.2 paf 127: try {
1.1 paf 128: char buf[MAX_STRING];
129: size_t size=fread(buf, 1, MAX_STRING-1, f);
130: if(size>2) {
131: buf[size]=0;
132: if(strncmp(buf, "#!", 2)==0) {
1.48.2.5 paf 133: const char* begin=buf+2;
1.4 paf 134: if(*begin==' ') // alx: were an old magic for some linux-es
135: begin++;
136: if(char *end=strchr(begin, '\n')) {
1.48.2.2 paf 137: String string(begin, end-begin);
1.1 paf 138: string << " " << file_spec_cstr;
1.8 parser 139: result=string.cstr();
1.1 paf 140: }
141: }
142: }
1.48.2.2 paf 143: } catch(...) {
144: fclose(f);
145: rethrow;
146: }
1.1 paf 147: fclose(f);
148: }
1.48.2.2 paf 149: { // appending argv
150: String string(result);
151: for(int i=0; i<argv.count(); i++) {
152: string << " ";
153: string << *argv[i];
1.8 parser 154: }
155:
1.48.2.2 paf 156: result=string.cstr();
1.8 parser 157: }
158:
159: return result;
1.1 paf 160: }
161:
162: #else
163:
1.48.2.5 paf 164: static pid_t execve_piped(const char* file_spec_cstr,
1.27 paf 165: char * const argv[], char * const env[],
166: int *pipe_in, int *pipe_out, int *pipe_err) {
1.46 paf 167: pid_t pid;
1.1 paf 168: int in_fds[2];
169: int out_fds[2];
170: int err_fds[2];
171: int save_errno;
172:
173: if(pipe_in && pipe(in_fds)<0) {
174: save_errno=errno;
175: errno=save_errno;
176: return 0;
177: }
178:
179: if(pipe_out && pipe(out_fds)<0) {
180: save_errno=errno;
181: if(pipe_in) {
182: close(in_fds[0]); close(in_fds[1]);
183: }
184: errno=save_errno;
185: return 0;
186: }
187:
188: if(pipe_err && pipe(err_fds)<0) {
189: save_errno=errno;
190: if(pipe_in) {
191: close(in_fds[0]); close(in_fds[1]);
192: }
193: if(pipe_out) {
194: close(out_fds[0]); close(out_fds[1]);
195: }
196: errno=save_errno;
197: return 0;
198: }
199:
200: if((pid=fork())<0) {
201: save_errno=errno;
202: if(pipe_in) {
203: close(in_fds[0]); close(in_fds[1]);
204: }
205: if(pipe_out) {
206: close(out_fds[0]); close(out_fds[1]);
207: }
208: if(pipe_err) {
209: close(err_fds[0]); close(err_fds[1]);
210: }
211: errno=save_errno;
1.46 paf 212: return -1;
1.1 paf 213: }
214:
215: if(!pid) {
216: /* Child process */
217:
218: if(pipe_out) {
219: close(out_fds[0]);
220: dup2(out_fds[1], STDOUT_FILENO);
221: close(out_fds[1]);
222: }
223:
224: if(pipe_in) {
225: close(in_fds[1]);
226: dup2(in_fds[0], STDIN_FILENO);
227: close(in_fds[0]);
228: }
229:
230: if(pipe_err) {
231: close(err_fds[0]);
232: dup2(err_fds[1], STDERR_FILENO);
233: close(err_fds[1]);
234: }
235:
1.42 paf 236: /* grabbed this from Apache source: */
237: /* HP-UX SIGCHLD fix goes here, if someone will remind me what it is... */
1.1 paf 238: signal(SIGCHLD, SIG_DFL); /* Was that it? */
239:
1.31 paf 240: // chdir to script's directory
241: char dir[MAX_STRING];
242: strncpy(dir, file_spec_cstr, MAX_STRING-1); dir[MAX_STRING-1]=0;
243: rsplit(dir,'/'); // trim filename
244: chdir(dir);
245:
246: // execute
247: execve(file_spec_cstr, argv, env);
1.1 paf 248: exit(-errno);
249: }
250:
251: /* Parent process */
252:
253: if(pipe_out) {
254: close(out_fds[1]);
255: *pipe_out=out_fds[0];
256: }
257:
258: if(pipe_in) {
259: close(in_fds[0]);
260: *pipe_in=in_fds[1];
261: }
262:
263: if(pipe_err) {
264: close(err_fds[1]);
265: *pipe_err=err_fds[0];
266: }
267:
268: return pid;
269: }
270:
271: static int get_exit_status(int pid) {
272: int status;
273: if(!waitpid(pid, &status, 0))
274: return -1;
275: return WIFEXITED(status) ?
276: WEXITSTATUS(status) : -2;
277: }
278:
1.48.2.18.2.7! (paf 279:: static void read_pipe(String& result, int file, String::Language lang){
1.1 paf 280: while(true) {
1.48.2.18.2.7! (paf 281:: char *buf=new(PointerFreeGC) char[MAX_STRING];
1.40 paf 282: ssize_t size=read(file, buf, MAX_STRING);
283: if(size<=0)
1.1 paf 284: break;
1.48.2.18.2.7! (paf 285:: result.append(buf, size, lang);
! 286:: }
1.1 paf 287: }
288:
289: #endif
290:
1.48.2.8 paf 291: #ifndef DOXYGEN
292: struct Append_env_pair_info {
1.1 paf 293: #ifdef WIN32
1.48.2.18.2.6 (paf 294:: String& string;
295:: Append_env_pair_info(String& astring): string(astring) {}
1.1 paf 296: #else
1.48.2.8 paf 297: char **env_ref;
1.48.2.2 paf 298: #endif
1.48.2.8 paf 299: };
300: #endif
1.48.2.18.2.5 (paf 301:: ///@test maybe here and at argv construction --- cstr(String::L_UNSPECIFIED
1.48.2.8 paf 302: static void append_env_pair(HashStringString::key_type key, HashStringString::value_type value,
303: Append_env_pair_info *info) {
1.48.2.2 paf 304: #ifdef WIN32
1.48.2.18.2.7! (paf 305:: info->string << key << "=" << *value;
! 306:: info->string.append("", 1, String::L_AS_IS); // zero byte
1.48.2.2 paf 307: #else
308: String string;
1.48.2.18.2.7! (paf 309:: string << key << "=" << *value;
1.1 paf 310:
1.48.2.18.2.5 (paf 311:: *(info->env_ref++)=string.cstr(*info->String::L_UNSPECIFIED);
1.1 paf 312: #endif
313: }
1.31 paf 314:
1.48.2.2 paf 315: /// @todonow unix part to smart_ptr
1.48.2.18.2.1 (paf 316:: PA_exec_result pa_exec(
1.48.2.2 paf 317: bool forced_allow,
1.48.2.18.2.1 (paf 318:: const String& file_spec,
1.48.2.17 paf 319: const HashStringString* env,
1.48.2.13 paf 320: const ArrayString& argv,
1.48.2.12 paf 321: String& in) {
322: PA_exec_result result;
323:
1.28 paf 324: #ifdef NO_PA_EXECS
1.32 paf 325: if(!forced_allow)
1.34 paf 326: throw Exception("parser.runtime",
1.48.2.18.2.7! (paf 327:: &file_spec,
1.32 paf 328: "parser execs are disabled [recompile parser without --disable-execs configure option]");
329: #endif
1.28 paf 330:
1.48.2.18.2.7! (paf 331:: const char* file_spec_cstr=file_spec.cstr(String::L_FILE_SPEC);
1.1 paf 332: #ifdef WIN32
333:
334: PROCESS_INFORMATION pi;
335: HANDLE hInWrite, hOutRead, hErrRead;
1.48.2.18.2.7! (paf 336:: const char* cmd=buildCommand(file_spec.cstr(String::L_FILE_SPEC), argv);
! 337:: char* env_cstr;
1.48.2.17 paf 338: if(env) {
1.48.2.2 paf 339: String string;
1.48.2.18.2.7! (paf 340:: Append_env_pair_info info(string);
1.48.2.17 paf 341: env->for_each(append_env_pair, &info);
1.48.2.18.2.7! (paf 342:: env_cstr=info.string.cstrm(String::L_UNSPECIFIED);
1.1 paf 343: }
1.36 paf 344: if(DWORD error=CreateHiddenConsoleProcess(cmd, env_cstr, &pi, &hInWrite, &hOutRead, &hErrRead)) {
345: char szErrorDesc[MAX_STRING];
1.48.2.18.2.3 (paf 346:: const char* param="the file you tried to run";
1.36 paf 347: size_t error_size=FormatMessage(
348: FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_ARGUMENT_ARRAY , NULL, error,
349: MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL),
1.48.2.7 paf 350: szErrorDesc, sizeof(szErrorDesc), (va_list *)¶m);
1.36 paf 351: if(error_size>3) // ".\r\n"
352: szErrorDesc[error_size-3]=0;
353:
354: throw Exception(0,
1.48.2.18.2.7! (paf 355:: &file_spec,
1.36 paf 356: "exec failed - %s (%ld). Consider adding shbang line (#!x:\\interpreter\\command line)",
357: error_size?szErrorDesc:"<unknown>", (long)error);
358: } else {
1.48.2.18.2.1 (paf 359:: const char* in_cstr=in.cstr();
1.5 paf 360: DWORD written_size;
1.48.2.18.2.4 (paf 361:: WriteFile(hInWrite, in_cstr, in.length(), &written_size, NULL);
1.5 paf 362: // EOF for stupid text reads
363: // normally they should read CONTENT_LENGTH bytes,
364: // without this char
365: WriteFile(hInWrite, "\x1A", 1, &written_size, NULL);
1.9 parser 366: CloseHandle(hInWrite);
1.48.2.18.2.7! (paf 367:: read_pipe(result.out, hOutRead, String::L_AS_IS);
1.9 parser 368: CloseHandle(hOutRead);
1.48.2.18.2.7! (paf 369:: read_pipe(result.err, hErrRead, String::L_TAINTED);
1.9 parser 370: CloseHandle(hErrRead);
1.1 paf 371: /*
372: 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
373:
374: * We must close the handles to the new process and its main thread
375: * to prevent handle and memory leaks.
376: */
377: CloseHandle(pi.hProcess);
378: CloseHandle(pi.hThread);
379: }
380:
381: #else
382:
383: int pipe_write, pipe_read, pipe_err;
1.31 paf 384:
1.47 paf 385: #ifdef PA_SAFE_MODE
1.32 paf 386: if(!forced_allow) {
387: struct stat finfo;
388: if(stat(file_spec_cstr, &finfo)!=0)
1.34 paf 389: throw Exception("file.missing",
1.48.2.8 paf 390: file_spec,
1.32 paf 391: "stat failed: %s (%d), actual filename '%s'",
392: strerror(errno), errno, file_spec_cstr);
1.31 paf 393:
1.47 paf 394: if(finfo.st_uid/*foreign?*/!=geteuid()
395: && finfo.st_gid/*foreign?*/!=getegid())
396: throw Exception("parser.runtime",
1.48.2.8 paf 397: file_spec,
1.47 paf 398: "parser is in safe mode: executing files of foreign group and user disabled [recompile parser with --disable-safe-mode configure option], actual filename '%s'",
1.32 paf 399: file_spec_cstr);
400: }
1.31 paf 401: #endif
402:
1.48.2.8 paf 403: char * argv_cstrs[1+10+1]={file_spec_cstr, 0};
404: const int argv_size=argv.count();
405: const int argv_max=sizeof(argv_cstrs)/sizeof(argv_cstrs[0])-1-1;
406: if(argv_size>argv_max)
407: throw Exception("parser.runtime",
408: file_spec,
409: "too many arguments (%d > max %d)", argv_size, argv_max);
410: for(int i=0; i<argv_size; i++)
1.48.2.18.2.1 (paf 411:: argv_cstrs[1+i]=argv[i]->cstr();
1.48.2.8 paf 412: argv_cstrs[1+argv_size]=0;
413:
1.48.2.18 paf 414: char **env_cstrs;
415: if(env) {
1.48.2.18.2.1 (paf 416:: env_cstrs=new char *[env->count()+1/*0*/];
1.48.2.18.2.2 (paf 417:: Append_env_pair_info info={&env_cstrs};
1.48.2.18 paf 418: env->for_each(append_env_pair, &info);
1.48.2.8 paf 419: *info.env_ref=0;
1.48.2.18 paf 420: } else
421: env_cstrs=0;
1.31 paf 422:
1.46 paf 423: pid_t pid=execve_piped(
1.1 paf 424: file_spec_cstr,
1.27 paf 425: argv_cstrs, env_cstrs,
1.22 paf 426: &pipe_write, &pipe_read, &pipe_err);
1.46 paf 427: if(pid>0) {
1.21 paf 428: // in child
1.48.2.18.2.4 (paf 429:: if(in.length()) {// there is some in data
1.48.2.18.2.1 (paf 430:: const char* in_cstr=in.cstr();
1.48.2.18.2.4 (paf 431:: write(pipe_write, in_cstr, in.length());
1.48.2.8 paf 432: }
1.1 paf 433: close(pipe_write);
1.48.2.18.2.5 (paf 434:: result.out=read_pipe(pipe_read, file_spec_cstr, String::L_AS_IS);
1.5 paf 435: close(pipe_read);
1.48.2.18.2.5 (paf 436:: result.err=read_pipe(pipe_err, file_spec_cstr, String::L_TAINTED);
1.1 paf 437: close(pipe_err);
438:
1.48.2.12 paf 439: result.status=get_exit_status(pid); // negative may mean "-errno[execl()]"
1.1 paf 440: } else
1.34 paf 441: throw Exception(0,
1.48.2.8 paf 442: file_spec,
1.46 paf 443: "%s error: %s (%d)", pid<0?"fork":"pipe", strerror(errno), errno);
1.1 paf 444: #endif
445:
1.48.2.12 paf 446: return result;
1.1 paf 447: }
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