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1.1 paf 1: /** @file
2: Parser: program executing for different OS-es.
3:
1.24 paf 4: Copyright(c) 2000,2001, 2002 ArtLebedev Group(http://www.artlebedev.com)
1.25 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6:
1.32 ! paf 7: $Id: pa_exec.C,v 1.31 2002/03/25 11:36:24 paf Exp $
1.18 paf 8:
9:
10: @todo setrlimit
1.1 paf 11: */
12:
13: #include "pa_config_includes.h"
14:
1.19 paf 15: #include "pa_exec.h"
16: #include "pa_exception.h"
17: #include "pa_common.h"
18:
1.1 paf 19: #ifdef WIN32
20: # include <windows.h>
21: #else
22: # include <signal.h>
23: # include <sys/types.h>
24: # include <sys/wait.h>
25: #endif
26:
27: #ifdef WIN32
28:
29: /// this func from http://www.ccas.ru/~posp/popov/spawn.htm
1.26 paf 30: static BOOL WINAPI CreateHiddenConsoleProcess(LPCTSTR szCmdLine,
1.1 paf 31: char *szEnv,
32: PROCESS_INFORMATION* ppi,
33: LPHANDLE phInWrite,
34: LPHANDLE phOutRead,
1.9 parser 35: LPHANDLE phErrRead)
1.1 paf 36: {
37: BOOL fCreated;
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;
76: rsplit(dir,'/'); rsplit(dir,'\\'); // trim filename
77: chdir(dir);
78:
1.1 paf 79: // Create a child process (suspended)
1.9 parser 80: fCreated=CreateProcess(NULL,
1.26 paf 81: (LPTSTR)szCmdLine,
1.1 paf 82: NULL,
83: NULL,
84: TRUE,
1.30 paf 85: CREATE_NO_WINDOW,
1.1 paf 86: szEnv,
1.31 paf 87: dir,
1.1 paf 88: &si,
1.9 parser 89: ppi);
1.1 paf 90:
1.9 parser 91: CloseHandle(hInRead);
92: CloseHandle(hOutWrite);
93: CloseHandle(hErrWrite);
1.1 paf 94:
1.9 parser 95: if(!fCreated)
1.1 paf 96: goto error;
97:
98: return TRUE;
99:
100: error:
1.9 parser 101: CloseHandle(*phInWrite);
102: CloseHandle(*phOutRead);
103: CloseHandle(*phErrRead);
1.1 paf 104:
105: return FALSE;
106: }
107:
1.2 paf 108: static void read_pipe(String& result, HANDLE hOutRead, const char *file_spec){
1.1 paf 109: while(true) {
110: char *buf=(char *)result.pool().malloc(MAX_STRING);
111: unsigned long size;
1.30 paf 112: if(!ReadFile(hOutRead, buf, MAX_STRING, &size, NULL) || !size)
1.1 paf 113: break;
1.3 paf 114: result.APPEND_AS_IS(buf, size, file_spec, 0);
1.1 paf 115: }
116: }
117:
118:
119: static const char *buildCommand(Pool& pool,
120: const String& origin_string,
121: const char *file_spec_cstr, const Array *argv) {
1.8 parser 122: const char *result=file_spec_cstr;
1.4 paf 123: if(FILE *f=fopen(file_spec_cstr, "r")) {
1.1 paf 124: char buf[MAX_STRING];
125: size_t size=fread(buf, 1, MAX_STRING-1, f);
126: if(size>2) {
127: buf[size]=0;
128: if(strncmp(buf, "#!", 2)==0) {
1.4 paf 129: const char *begin=buf+2;
130: if(*begin==' ') // alx: were an old magic for some linux-es
131: begin++;
132: if(char *end=strchr(begin, '\n')) {
1.1 paf 133: String string(pool);
1.4 paf 134: string.APPEND_AS_IS(begin, end-begin,
1.1 paf 135: origin_string.origin().file, 0);
136: string << " " << file_spec_cstr;
137: if(argv)
138: for(int i=0; i<argv->size(); i++)
1.16 paf 139: string << argv->get_string(i)->cstr();
1.8 parser 140: result=string.cstr();
1.1 paf 141: }
142: }
143: }
144: fclose(f);
145: }
1.8 parser 146: if(argv) {
147: String buf(pool);
148: buf << result;
149: for(int i=0; i<argv->size(); i++) {
150: buf << " ";
151: buf << *argv->get_string(i);
152: }
153:
1.16 paf 154: result=buf.cstr();
1.8 parser 155: }
156:
157: return result;
1.1 paf 158: }
159:
160: #else
161:
1.31 paf 162: static int execve_piped(const char *file_spec_cstr,
1.27 paf 163: char * const argv[], char * const env[],
164: int *pipe_in, int *pipe_out, int *pipe_err) {
1.1 paf 165: int pid;
166: int in_fds[2];
167: int out_fds[2];
168: int err_fds[2];
169: int save_errno;
170:
171: if(pipe_in && pipe(in_fds)<0) {
172: save_errno=errno;
173: errno=save_errno;
174: return 0;
175: }
176:
177: if(pipe_out && pipe(out_fds)<0) {
178: save_errno=errno;
179: if(pipe_in) {
180: close(in_fds[0]); close(in_fds[1]);
181: }
182: errno=save_errno;
183: return 0;
184: }
185:
186: if(pipe_err && pipe(err_fds)<0) {
187: save_errno=errno;
188: if(pipe_in) {
189: close(in_fds[0]); close(in_fds[1]);
190: }
191: if(pipe_out) {
192: close(out_fds[0]); close(out_fds[1]);
193: }
194: errno=save_errno;
195: return 0;
196: }
197:
198: if((pid=fork())<0) {
199: save_errno=errno;
200: if(pipe_in) {
201: close(in_fds[0]); close(in_fds[1]);
202: }
203: if(pipe_out) {
204: close(out_fds[0]); close(out_fds[1]);
205: }
206: if(pipe_err) {
207: close(err_fds[0]); close(err_fds[1]);
208: }
209: errno=save_errno;
210: return 0;
211: }
212:
213: if(!pid) {
214: /* Child process */
215:
216: if(pipe_out) {
217: close(out_fds[0]);
218: dup2(out_fds[1], STDOUT_FILENO);
219: close(out_fds[1]);
220: }
221:
222: if(pipe_in) {
223: close(in_fds[1]);
224: dup2(in_fds[0], STDIN_FILENO);
225: close(in_fds[0]);
226: }
227:
228: if(pipe_err) {
229: close(err_fds[0]);
230: dup2(err_fds[1], STDERR_FILENO);
231: close(err_fds[1]);
232: }
233:
234: /* HP-UX SIGCHLD fix goes here, if someone will remind me what it is... */
235: signal(SIGCHLD, SIG_DFL); /* Was that it? */
236:
1.31 paf 237: // chdir to script's directory
238: char dir[MAX_STRING];
239: strncpy(dir, file_spec_cstr, MAX_STRING-1); dir[MAX_STRING-1]=0;
240: rsplit(dir,'/'); // trim filename
241: chdir(dir);
242:
243: // execute
244: execve(file_spec_cstr, argv, env);
1.1 paf 245: exit(-errno);
246: }
247:
248: /* Parent process */
249:
250: if(pipe_out) {
251: close(out_fds[1]);
252: *pipe_out=out_fds[0];
253: }
254:
255: if(pipe_in) {
256: close(in_fds[0]);
257: *pipe_in=in_fds[1];
258: }
259:
260: if(pipe_err) {
261: close(err_fds[1]);
262: *pipe_err=err_fds[0];
263: }
264:
265: return pid;
266: }
267:
268: static int get_exit_status(int pid) {
269: int status;
270: if(!waitpid(pid, &status, 0))
271: return -1;
272: return WIFEXITED(status) ?
273: WEXITSTATUS(status) : -2;
274: }
275:
1.2 paf 276: static void read_pipe(String& result, int file, const char *file_spec){
1.1 paf 277: while(true) {
1.2 paf 278: char *buf=(char *)result.pool().malloc(MAX_STRING);
1.1 paf 279: size_t size=read(file, buf, MAX_STRING);
1.30 paf 280: if(!size)
1.1 paf 281: break;
1.3 paf 282: result.APPEND_AS_IS(buf, size, file_spec, 0);
1.1 paf 283: }
284: }
285:
286: #endif
287:
1.30 paf 288: ///@test maybe here and at argv construction --- cstr(String::UL_UNSPECIFIED
1.1 paf 289: static void append_env_pair(const Hash::Key& key, Hash::Val *value, void *info) {
290: #ifdef WIN32
291: String& string=*static_cast<String *>(info);
292:
293: string << key << "=" << *static_cast<String *>(value);
1.3 paf 294: string.APPEND_AS_IS("", 1, 0, 0); // zero byte
1.1 paf 295: #else
296: String string(key.pool());
297: string << key << "=" << *static_cast<String *>(value);
298:
1.2 paf 299: char ***env_ref=static_cast<char ***>(info);
300: **env_ref=string.cstr(); (*env_ref)++;
1.1 paf 301: #endif
302: }
1.31 paf 303:
1.32 ! paf 304: int pa_exec(
! 305: bool forced_allow,
! 306: const String& file_spec,
1.1 paf 307: const Hash *env,
308: const Array *argv,
309: const String& in, String& out, String& err) {
310: Pool& pool=file_spec.pool();
311:
1.28 paf 312: #ifdef NO_PA_EXECS
1.32 ! paf 313: if(!forced_allow)
! 314: throw Exception(0, 0,
! 315: &file_spec,
! 316: "parser execs are disabled [recompile parser without --disable-execs configure option]");
! 317: #endif
1.28 paf 318:
1.1 paf 319: #ifdef WIN32
320:
321: PROCESS_INFORMATION pi;
322: HANDLE hInWrite, hOutRead, hErrRead;
1.12 parser 323: char *file_spec_cstr=file_spec.cstr(String::UL_FILE_SPEC);
1.1 paf 324: const char *cmd=buildCommand(file_spec.pool(), file_spec, file_spec_cstr, argv);
325: char *env_cstr=0;
326: if(env) {
327: String string(env->pool());
328: env->for_each(append_env_pair, &string);
1.16 paf 329: env_cstr=string.cstr();
1.1 paf 330: }
1.9 parser 331: if(CreateHiddenConsoleProcess(cmd, env_cstr, &pi, &hInWrite, &hOutRead, &hErrRead)) {
1.16 paf 332: const char *in_cstr=in.cstr();
1.5 paf 333: DWORD written_size;
334: WriteFile(hInWrite, in_cstr, in.size(), &written_size, NULL);
335: // EOF for stupid text reads
336: // normally they should read CONTENT_LENGTH bytes,
337: // without this char
338: WriteFile(hInWrite, "\x1A", 1, &written_size, NULL);
1.9 parser 339: CloseHandle(hInWrite);
1.1 paf 340: read_pipe(out, hOutRead, file_spec_cstr);
1.9 parser 341: CloseHandle(hOutRead);
1.5 paf 342: read_pipe(err, hErrRead, file_spec_cstr);
1.9 parser 343: CloseHandle(hErrRead);
1.1 paf 344: /*
345: 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
346:
347: * We must close the handles to the new process and its main thread
348: * to prevent handle and memory leaks.
349: */
350: CloseHandle(pi.hProcess);
351: CloseHandle(pi.hThread);
352: } else {
353: DWORD error=GetLastError();
354: char szErrorDesc[MAX_STRING];
355: FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, error,
356: MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL),
357: szErrorDesc, sizeof(szErrorDesc), NULL);
358: size_t error_size=strlen(szErrorDesc);
359: if(error_size>3) // ".\r\n"
360: szErrorDesc[error_size-3]=0;
361:
1.15 parser 362: throw Exception(0, 0,
1.1 paf 363: &file_spec,
1.26 paf 364: "(real command line=\"%s\") exec failed - %s (%ld)",
1.11 parser 365: cmd,
1.10 parser 366: szErrorDesc, (long)error);
1.1 paf 367: }
368:
369: #else
370:
371: int pipe_write, pipe_read, pipe_err;
1.27 paf 372: char *file_spec_cstr=file_spec.cstr(String::UL_FILE_SPEC);
1.31 paf 373:
374: #ifdef NO_FOREIGN_GROUP_FILES
1.32 ! paf 375: if(!forced_allow) {
! 376: struct stat finfo;
! 377: if(stat(file_spec_cstr, &finfo)!=0)
! 378: throw Exception(0, 0,
! 379: &file_spec,
! 380: "stat failed: %s (%d), actual filename '%s'",
! 381: strerror(errno), errno, file_spec_cstr);
1.31 paf 382:
1.32 ! paf 383: if(finfo.st_gid/*foreign?*/!=getegid())
! 384: throw Exception(0, 0,
! 385: &file_spec,
! 386: "parser executing files of foreign group is disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'",
! 387: file_spec_cstr);
! 388: }
1.31 paf 389: #endif
390:
1.27 paf 391: char *argv_cstrs[1+10+1]={file_spec_cstr, 0};
1.1 paf 392: if(argv) {
1.20 paf 393: const int argv_size=argv->size();
1.27 paf 394: const int argv_max=sizeof(argv_cstrs)/sizeof(argv_cstrs[0])-1-1;
1.20 paf 395: if(argv_size>argv_max)
396: throw Exception(0, 0,
397: &file_spec,
398: "too many arguments (%d > max %d)", argv_size, argv_max);
399: for(int i=0; i<argv_size; i++)
1.27 paf 400: argv_cstrs[1+i]=argv->get_string(i)->cstr();
401: argv_cstrs[1+argv_size]=0;
1.1 paf 402: }
1.2 paf 403: char **env_cstrs=0;
1.1 paf 404: if(env) {
1.2 paf 405: env_cstrs=
1.1 paf 406: (char **)env->pool().malloc(sizeof(char *)*(env->size()+1/*0*/));
1.2 paf 407: char **env_ref=env_cstrs;
408: env->for_each(append_env_pair, &env_ref);
409: *env_ref=0;
1.1 paf 410: }
1.31 paf 411:
1.27 paf 412: int pid=execve_piped(
1.1 paf 413: file_spec_cstr,
1.27 paf 414: argv_cstrs, env_cstrs,
1.22 paf 415: &pipe_write, &pipe_read, &pipe_err);
1.21 paf 416: if(pid) {
417: // in child
1.16 paf 418: const char *in_cstr=in.cstr();
1.1 paf 419: write(pipe_write, in_cstr, in.size());
420: close(pipe_write);
421: read_pipe(out, pipe_read, file_spec_cstr);
1.5 paf 422: close(pipe_read);
1.1 paf 423: read_pipe(err, pipe_err, file_spec_cstr);
424: close(pipe_err);
425:
426: return get_exit_status(pid); // negative may mean "-errno[execl()]"
427: } else
1.15 parser 428: throw Exception(0, 0,
1.2 paf 429: &file_spec,
1.1 paf 430: "pipe error");
431: #endif
432:
433: return 0;
434: }