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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:
1.25 ! paf 7: $Id: pa_exec.C,v 1.24 2002/02/08 07:27:48 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
1.9 parser 30: static BOOL WINAPI CreateHiddenConsoleProcess(LPCTSTR szChildName,
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:
73: // Create a child process (suspended)
1.9 parser 74: fCreated=CreateProcess(NULL,
1.1 paf 75: (LPTSTR)szChildName,
76: NULL,
77: NULL,
78: TRUE,
1.9 parser 79: 0, //todo CREATE_NO_WINDOW,
1.1 paf 80: szEnv,
81: NULL,
82: &si,
1.9 parser 83: ppi);
1.1 paf 84:
1.9 parser 85: CloseHandle(hInRead);
86: CloseHandle(hOutWrite);
87: CloseHandle(hErrWrite);
1.1 paf 88:
1.9 parser 89: if(!fCreated)
1.1 paf 90: goto error;
91:
92: return TRUE;
93:
94: error:
1.9 parser 95: CloseHandle(*phInWrite);
96: CloseHandle(*phOutRead);
97: CloseHandle(*phErrRead);
1.1 paf 98:
99: return FALSE;
100: }
101:
1.2 paf 102: static void read_pipe(String& result, HANDLE hOutRead, const char *file_spec){
1.1 paf 103: while(true) {
104: char *buf=(char *)result.pool().malloc(MAX_STRING);
105: unsigned long size;
1.9 parser 106: ReadFile(hOutRead, buf, MAX_STRING, &size, NULL);
1.1 paf 107: if(!size)
108: break;
1.3 paf 109: result.APPEND_AS_IS(buf, size, file_spec, 0);
1.1 paf 110: }
111: }
112:
113:
114: static const char *buildCommand(Pool& pool,
115: const String& origin_string,
116: const char *file_spec_cstr, const Array *argv) {
1.8 parser 117: const char *result=file_spec_cstr;
1.4 paf 118: if(FILE *f=fopen(file_spec_cstr, "r")) {
1.1 paf 119: char buf[MAX_STRING];
120: size_t size=fread(buf, 1, MAX_STRING-1, f);
121: if(size>2) {
122: buf[size]=0;
123: if(strncmp(buf, "#!", 2)==0) {
1.4 paf 124: const char *begin=buf+2;
125: if(*begin==' ') // alx: were an old magic for some linux-es
126: begin++;
127: if(char *end=strchr(begin, '\n')) {
1.1 paf 128: String string(pool);
1.4 paf 129: string.APPEND_AS_IS(begin, end-begin,
1.1 paf 130: origin_string.origin().file, 0);
131: string << " " << file_spec_cstr;
132: if(argv)
133: for(int i=0; i<argv->size(); i++)
1.16 paf 134: string << argv->get_string(i)->cstr();
1.8 parser 135: result=string.cstr();
1.1 paf 136: }
137: }
138: }
139: fclose(f);
140: }
1.8 parser 141: if(argv) {
142: String buf(pool);
143: buf << result;
144: for(int i=0; i<argv->size(); i++) {
145: buf << " ";
146: buf << *argv->get_string(i);
147: }
148:
1.16 paf 149: result=buf.cstr();
1.8 parser 150: }
151:
152: return result;
1.1 paf 153: }
154:
155: #else
156:
157: static int execle_piped(const char *path,
1.8 parser 158: const char *arg1, const char *arg2,
159: const char *arg3, const char *arg4,
160: const char *arg5, const char *arg6,
161: const char *arg7, const char *arg8,
162: const char *arg9, const char *arg10,
1.1 paf 163: char * const env[],
164: int *pipe_in, int *pipe_out, int *pipe_err) {
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:
1.23 paf 237: execle(path, path, arg1, arg2, arg3, arg4, arg5, NULL, env);
1.1 paf 238: exit(-errno);
239: }
240:
241: /* Parent process */
242:
243: if(pipe_out) {
244: close(out_fds[1]);
245: *pipe_out=out_fds[0];
246: }
247:
248: if(pipe_in) {
249: close(in_fds[0]);
250: *pipe_in=in_fds[1];
251: }
252:
253: if(pipe_err) {
254: close(err_fds[1]);
255: *pipe_err=err_fds[0];
256: }
257:
258: return pid;
259: }
260:
261: static int get_exit_status(int pid) {
262: int status;
263: if(!waitpid(pid, &status, 0))
264: return -1;
265: return WIFEXITED(status) ?
266: WEXITSTATUS(status) : -2;
267: }
268:
1.2 paf 269: static void read_pipe(String& result, int file, const char *file_spec){
1.1 paf 270: while(true) {
1.2 paf 271: char *buf=(char *)result.pool().malloc(MAX_STRING);
1.1 paf 272: size_t size=read(file, buf, MAX_STRING);
273: if(!size)
274: break;
1.3 paf 275: result.APPEND_AS_IS(buf, size, file_spec, 0);
1.1 paf 276: }
277: }
278:
279: #endif
280:
281: static void append_env_pair(const Hash::Key& key, Hash::Val *value, void *info) {
282: #ifdef WIN32
283: String& string=*static_cast<String *>(info);
284:
285: string << key << "=" << *static_cast<String *>(value);
1.3 paf 286: string.APPEND_AS_IS("", 1, 0, 0); // zero byte
1.1 paf 287: #else
288: String string(key.pool());
289: string << key << "=" << *static_cast<String *>(value);
290:
1.2 paf 291: char ***env_ref=static_cast<char ***>(info);
292: **env_ref=string.cstr(); (*env_ref)++;
1.1 paf 293: #endif
294: }
295: int pa_exec(const String& file_spec,
296: const Hash *env,
297: const Array *argv,
298: const String& in, String& out, String& err) {
299: Pool& pool=file_spec.pool();
300:
301: #ifdef WIN32
302:
303: char pwd[MAX_STRING];
304: GetCurrentDirectory(sizeof(pwd), pwd);
1.12 parser 305: char *dir=file_spec.cstr(String::UL_FILE_SPEC);
1.1 paf 306: rsplit(dir, '/'); SetCurrentDirectory(dir);
307:
308: PROCESS_INFORMATION pi;
309: HANDLE hInWrite, hOutRead, hErrRead;
1.12 parser 310: char *file_spec_cstr=file_spec.cstr(String::UL_FILE_SPEC);
1.1 paf 311: const char *cmd=buildCommand(file_spec.pool(), file_spec, file_spec_cstr, argv);
312: char *env_cstr=0;
313: if(env) {
314: String string(env->pool());
315: env->for_each(append_env_pair, &string);
1.16 paf 316: env_cstr=string.cstr();
1.1 paf 317: }
1.9 parser 318: if(CreateHiddenConsoleProcess(cmd, env_cstr, &pi, &hInWrite, &hOutRead, &hErrRead)) {
1.1 paf 319: SetCurrentDirectory(pwd);
320:
1.16 paf 321: const char *in_cstr=in.cstr();
1.5 paf 322: DWORD written_size;
323: WriteFile(hInWrite, in_cstr, in.size(), &written_size, NULL);
324: // EOF for stupid text reads
325: // normally they should read CONTENT_LENGTH bytes,
326: // without this char
327: WriteFile(hInWrite, "\x1A", 1, &written_size, NULL);
1.9 parser 328: CloseHandle(hInWrite);
1.1 paf 329: read_pipe(out, hOutRead, file_spec_cstr);
1.9 parser 330: CloseHandle(hOutRead);
1.5 paf 331: read_pipe(err, hErrRead, file_spec_cstr);
1.9 parser 332: CloseHandle(hErrRead);
1.1 paf 333: /*
334: 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
335:
336: * We must close the handles to the new process and its main thread
337: * to prevent handle and memory leaks.
338: */
339: CloseHandle(pi.hProcess);
340: CloseHandle(pi.hThread);
341: } else {
342: SetCurrentDirectory(pwd);
343:
344: DWORD error=GetLastError();
345: char szErrorDesc[MAX_STRING];
346: FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, error,
347: MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL),
348: szErrorDesc, sizeof(szErrorDesc), NULL);
349: size_t error_size=strlen(szErrorDesc);
350: if(error_size>3) // ".\r\n"
351: szErrorDesc[error_size-3]=0;
352:
1.15 parser 353: throw Exception(0, 0,
1.1 paf 354: &file_spec,
1.10 parser 355: "(real filename=\"%s\") exec failed - %s (%ld)",
1.11 parser 356: cmd,
1.10 parser 357: szErrorDesc, (long)error);
1.1 paf 358: }
359:
360: #else
361:
362: int pipe_write, pipe_read, pipe_err;
1.20 paf 363: const char *argv_cstrs[10]={
364: "", "", "", "", "",
365: "", "", "", "", ""
366: };
1.1 paf 367: if(argv) {
1.20 paf 368: const int argv_size=argv->size();
369: const int argv_max=sizeof(argv_cstrs)/sizeof(argv_cstrs[0]);
370: if(argv_size>argv_max)
371: throw Exception(0, 0,
372: &file_spec,
373: "too many arguments (%d > max %d)", argv_size, argv_max);
374: for(int i=0; i<argv_size; i++)
1.16 paf 375: argv_cstrs[i]=argv->get_string(i)->cstr();
1.1 paf 376: }
1.12 parser 377: const char *file_spec_cstr=file_spec.cstr(String::UL_FILE_SPEC);
1.2 paf 378: char **env_cstrs=0;
1.1 paf 379: if(env) {
1.2 paf 380: env_cstrs=
1.1 paf 381: (char **)env->pool().malloc(sizeof(char *)*(env->size()+1/*0*/));
1.2 paf 382: char **env_ref=env_cstrs;
383: env->for_each(append_env_pair, &env_ref);
384: *env_ref=0;
1.1 paf 385: }
1.21 paf 386: const char *pwd=getcwd(NULL, 0);
387: char dir[MAX_STRING];
388: strncpy(dir, file_spec_cstr, MAX_STRING);
389: rsplit(dir,'/'); // trim filename
390: chdir(dir);
391: int pid=execle_piped(
1.1 paf 392: file_spec_cstr,
1.2 paf 393: argv_cstrs[0], argv_cstrs[1], argv_cstrs[2], argv_cstrs[3], argv_cstrs[4],
1.8 parser 394: argv_cstrs[5], argv_cstrs[6], argv_cstrs[7], argv_cstrs[8], argv_cstrs[9],
1.2 paf 395: env_cstrs,
1.22 paf 396: &pipe_write, &pipe_read, &pipe_err);
1.21 paf 397: if (pwd)
398: chdir(pwd);
399: if(pid) {
400: // in child
1.16 paf 401: const char *in_cstr=in.cstr();
1.1 paf 402: write(pipe_write, in_cstr, in.size());
403: close(pipe_write);
404: read_pipe(out, pipe_read, file_spec_cstr);
1.5 paf 405: close(pipe_read);
1.1 paf 406: read_pipe(err, pipe_err, file_spec_cstr);
407: close(pipe_err);
408:
409: return get_exit_status(pid); // negative may mean "-errno[execl()]"
410: } else
1.15 parser 411: throw Exception(0, 0,
1.2 paf 412: &file_spec,
1.1 paf 413: "pipe error");
414: #endif
415:
416: return 0;
417: }