Annotation of libaitio/src/exec.c, revision 1.1.2.23
1.1.2.1 misho 1: #include "global.h"
2:
3:
4: /*
5: * io_progInit() - Init program pool
6: *
7: * @progName = program name for execution
8: * @initNum = initial started programs
9: * @maxNum = maximum started programs
10: * return: NULL error or !=NULL allocated pool (must destroied with io_progDestroy())
11: */
12: prog_t *
13: io_progInit(const char *progName, u_int initNum, u_int maxNum)
14: {
15: prog_t *prg = NULL;
16:
17: if (initNum > maxNum)
18: return NULL;
19:
20: prg = e_malloc(sizeof(prog_t));
21: if (!prg) {
22: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
23: return NULL;
24: } else
25: memset(prg, 0, sizeof(prog_t));
26:
27: prg->prog_inin = initNum;
28: prg->prog_maxn = maxNum;
29: strlcpy(prg->prog_name, progName, sizeof prg->prog_name);
30:
1.1.2.9 misho 31: prg->prog_used = e_malloc(E_ALIGN(prg->prog_maxn, sizeof *prg->prog_used) /
32: sizeof *prg->prog_used);
33: if (!prg->prog_used) {
34: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
35: e_free(prg);
36: return NULL;
37: }
38:
1.1.2.1 misho 39: prg->prog_fds = array_Init(prg->prog_maxn);
40: if (!prg->prog_fds) {
41: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
1.1.2.9 misho 42: e_free(prg->prog_used);
1.1.2.1 misho 43: e_free(prg);
44: return NULL;
45: }
46:
47: pthread_mutex_init(&prg->prog_mtx, NULL);
1.1.2.12 misho 48: signal(SIGPIPE, SIG_IGN);
1.1.2.2 misho 49:
1.1.2.6 misho 50: if (io_progOpen(prg, prg->prog_inin) < 0) {
1.1.2.2 misho 51: io_progDestroy(&prg);
1.1.2.6 misho 52: prg = NULL;
53: }
1.1.2.1 misho 54: return prg;
55: }
56:
57: /*
58: * io_progDestroy() - Destroy entire program pool
59: *
60: * @pprg = program pool
61: * return: none
62: */
63: void
64: io_progDestroy(prog_t ** __restrict pprg)
65: {
66: if (!pprg || !*pprg)
67: return;
68:
69: io_progClose(*pprg, 0);
70:
1.1.2.9 misho 71: e_free((*pprg)->prog_used);
1.1.2.1 misho 72: array_Destroy(&(*pprg)->prog_fds);
73: pthread_mutex_destroy(&(*pprg)->prog_mtx);
1.1.2.13 misho 74: signal(SIGPIPE, SIG_DFL);
1.1.2.1 misho 75:
76: e_free(*pprg);
77: *pprg = NULL;
78: }
79:
80: /*
81: * io_progClose() - Close all programs in pool
82: *
83: * @prg = program pool
84: * @closeNum = close program(s) (0 all)
85: * return: 0 error, >0 closed programs
86: */
87: int
88: io_progClose(prog_t * __restrict prg, u_int closeNum)
89: {
90: register int i;
91: int ret = 0;
1.1.2.14 misho 92: struct tagPIOPID *p;
1.1.2.1 misho 93:
94: if (!prg)
95: return 0;
96: if (closeNum > prg->prog_maxn) {
97: io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
98: return 0;
99: }
100:
101: pthread_mutex_lock(&prg->prog_mtx);
102: for (i = array_Size(prg->prog_fds) - 1;
103: (closeNum ? ret < closeNum : 42) && i > -1; i--)
1.1.2.14 misho 104: if (array_Get(prg->prog_fds, i) &&
105: #ifdef POPEN_STREAM
106: (p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
107: #else
108: (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
109: #endif
110: kill(p->pid, SIGTERM);
111: usleep(1000);
112: if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
113: kill(p->pid, SIGKILL);
1.1.2.11 misho 114: #ifdef POPEN_STREAM
1.1.2.6 misho 115: e_pclose(array(prg->prog_fds, i, FILE*));
1.1.2.11 misho 116: #else
117: e_pclose((int) array(prg->prog_fds, i, intptr_t));
118: #endif
1.1.2.1 misho 119: array_Del(prg->prog_fds, i, 0);
1.1.2.9 misho 120: clrbit(prg->prog_used, i);
1.1.2.1 misho 121: prg->prog_cnum--;
122: ret++;
123: }
124: pthread_mutex_unlock(&prg->prog_mtx);
125:
126: return ret;
127: }
128:
129: /*
1.1.2.14 misho 130: * io_progCloseAt() - Close program at pool of certain position
131: *
132: * @prg = program pool
133: * @idx = index at pool
134: * return: 0 error or !=0 closed program
135: */
136: int
137: io_progCloseAt(prog_t * __restrict prg, u_int idx)
138: {
139: int ret = 0;
140: struct tagPIOPID *p;
141:
142: if (!prg)
143: return 0;
144: if (idx > prg->prog_maxn) {
145: io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
146: return 0;
147: }
148:
149: pthread_mutex_lock(&prg->prog_mtx);
150: if (array_Get(prg->prog_fds, idx) &&
151: #ifdef POPEN_STREAM
152: (p = pio_pgetpid(array(prg->prog_fds, idx, FILE*)))) {
153: #else
154: (p = pio_pgetpid((int) array(prg->prog_fds, idx, intptr_t)))) {
155: #endif
156: kill(p->pid, SIGTERM);
157: usleep(1000);
158: if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
159: kill(p->pid, SIGKILL);
160: #ifdef POPEN_STREAM
161: e_pclose(array(prg->prog_fds, idx, FILE*));
162: #else
163: e_pclose((int) array(prg->prog_fds, idx, intptr_t));
164: #endif
165: array_Del(prg->prog_fds, idx, 0);
166: clrbit(prg->prog_used, idx);
167: prg->prog_cnum--;
168: ret++;
169: }
170: pthread_mutex_unlock(&prg->prog_mtx);
171:
172: return ret;
173: }
174:
175: /*
1.1.2.22 misho 176: * io_progCloseOf() - Close program at pool with certain handle
177: *
178: * @prg = program pool
179: * @h = handle of program
180: * return: 0 error, >0 closed programs
181: */
182: int
183: #ifdef POPEN_STREAM
184: io_progCloseOf(prog_t * __restrict prg, FILE *h)
185: #else
186: io_progCloseOf(prog_t * __restrict prg, int h)
187: #endif
188: {
189: register int i;
190: int ret = 0;
191: struct tagPIOPID *p;
192: #ifdef POPEN_STREAM
193: FILE *f;
194: #else
195: int f;
196: #endif
197:
198: if (!prg)
199: return 0;
200:
201: pthread_mutex_lock(&prg->prog_mtx);
202: for (i = 0; i < array_Size(prg->prog_fds); i++)
203: if (array_Get(prg->prog_fds, i)) {
204: #ifdef POPEN_STREAM
205: f = array(prg->prog_fds, i, FILE*);
206: if (f == h && (p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
207: #else
208: f = (int) array(prg->prog_fds, i, intptr_t);
209: if (f == h && (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
210: #endif
211: kill(p->pid, SIGTERM);
212: usleep(1000);
213: if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
214: kill(p->pid, SIGKILL);
215: #ifdef POPEN_STREAM
216: e_pclose(array(prg->prog_fds, i, FILE*));
217: #else
218: e_pclose((int) array(prg->prog_fds, i, intptr_t));
219: #endif
220: array_Del(prg->prog_fds, i, 0);
221: clrbit(prg->prog_used, i);
222: prg->prog_cnum--;
223: ret++;
224: break;
225: }
226: }
227: pthread_mutex_unlock(&prg->prog_mtx);
228:
229: return ret;
230: }
231:
232: /*
1.1.2.18 misho 233: * io_progOpen2() - Start program from pool on first unused slot
234: *
235: * @prg = program pool
236: * return: -1 error, >-1 reside at slot
237: */
238: int
239: io_progOpen2(prog_t * __restrict prg)
240: {
241: #ifdef POPEN_STREAM
242: FILE *f = NULL;
243: #else
244: int f = -1;
245: #endif
246: int stat, ret = -1;
247: register int i;
248: pid_t pid;
249:
250: if (!prg)
251: return -1;
252: if (prg->prog_cnum + 1 > prg->prog_maxn) {
253: io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
254: return -1;
255: }
256:
257: pthread_mutex_lock(&prg->prog_mtx);
258: for (i = 0; i < array_Size(prg->prog_fds); i++)
259: if (!array_Get(prg->prog_fds, i)) {
260: f = e_popen(prg->prog_name, "r+", &pid);
261: #ifdef POPEN_STREAM
262: if (!f) {
263: #else
264: if (f == -1) {
265: #endif
266: LOGERR;
267: break;
268: } else if (waitpid(pid, &stat, WNOHANG)) {
269: io_SetErr(ECHILD, "Program with pid=%d exit with status %d",
270: pid, WIFEXITED(stat) ? WEXITSTATUS(stat) : -1);
271: e_pclose(f);
272: break;
273: } else
274: array_Set(prg->prog_fds, i, f);
275: clrbit(prg->prog_used, i);
276: prg->prog_cnum++;
277: ret = i;
278: break;
279: }
280: pthread_mutex_unlock(&prg->prog_mtx);
281:
282: return ret;
283: }
284:
285: /*
1.1.2.1 misho 286: * io_progOpen() - Execute number of program(s)
287: *
288: * @prg = program pool
289: * @execNum = execute program(s) (0 max)
1.1.2.18 misho 290: * return: -1 error, >0 executed programs
1.1.2.1 misho 291: */
292: int
293: io_progOpen(prog_t * __restrict prg, u_int execNum)
294: {
1.1.2.11 misho 295: #ifdef POPEN_STREAM
1.1.2.1 misho 296: FILE *f;
1.1.2.11 misho 297: #else
298: int f;
299: #endif
1.1.2.4 misho 300: int stat, ret = 0;
1.1.2.1 misho 301: register int i;
1.1.2.4 misho 302: pid_t pid;
1.1.2.1 misho 303:
304: if (!prg)
1.1.2.18 misho 305: return -1;
1.1.2.8 misho 306: if (prg->prog_cnum + execNum > prg->prog_maxn) {
1.1.2.1 misho 307: io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
1.1.2.18 misho 308: return -1;
1.1.2.1 misho 309: }
310:
311: pthread_mutex_lock(&prg->prog_mtx);
312: for (i = 0; (execNum ? ret < execNum : 42) && i < array_Size(prg->prog_fds); i++)
313: if (!array_Get(prg->prog_fds, i)) {
1.1.2.6 misho 314: f = e_popen(prg->prog_name, "r+", &pid);
1.1.2.11 misho 315: #ifdef POPEN_STREAM
1.1.2.1 misho 316: if (!f) {
1.1.2.11 misho 317: #else
318: if (f == -1) {
319: #endif
1.1.2.1 misho 320: LOGERR;
1.1.2.5 misho 321: ret = -1;
1.1.2.1 misho 322: break;
1.1.2.6 misho 323: } else if (waitpid(pid, &stat, WNOHANG)) {
324: io_SetErr(ECHILD, "Program with pid=%d exit with status %d",
325: pid, WIFEXITED(stat) ? WEXITSTATUS(stat) : -1);
1.1.2.18 misho 326: e_pclose(f);
1.1.2.5 misho 327: ret = -1;
1.1.2.4 misho 328: break;
1.1.2.1 misho 329: } else
330: array_Set(prg->prog_fds, i, f);
1.1.2.15 misho 331: clrbit(prg->prog_used, i);
1.1.2.1 misho 332: prg->prog_cnum++;
333: ret++;
334: }
335: pthread_mutex_unlock(&prg->prog_mtx);
336:
337: return ret;
338: }
339:
340: /*
1.1.2.8 misho 341: * io_progGrow() - Execute to number of programs in pool
342: *
343: * @prg = program pool
344: * @toNum = execute to number of programs (0 max)
1.1.2.17 misho 345: * return: 0 error or nothing to do,
346: * >0 executed programs and abs(<0) executed programs with logged error
1.1.2.8 misho 347: */
348: int
349: io_progGrow(prog_t * __restrict prg, u_int toNum)
350: {
351: if (!prg)
352: return 0;
353: if (toNum > prg->prog_maxn) {
354: io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
355: return 0;
356: }
357: if (!toNum)
358: toNum = prg->prog_maxn;
1.1.2.17 misho 359: if (toNum < prg->prog_inin)
360: toNum = prg->prog_inin;
361:
1.1.2.19 misho 362: if ((int) (toNum - prg->prog_cnum) < 1)
1.1.2.17 misho 363: return 0;
1.1.2.8 misho 364:
365: return io_progOpen(prg, toNum - prg->prog_cnum);
366: }
367:
368: /*
1.1.2.1 misho 369: * io_progVacuum() - Vacuum pool to running number of programs
370: *
371: * @prg = program pool
372: * @toNum = vacuum to number of programs (0 to init number)
373: * return: 0 error or >0 closed programs
374: */
375: int
376: io_progVacuum(prog_t * __restrict prg, u_int toNum)
377: {
378: register int i;
379: int ret = 0;
1.1.2.14 misho 380: struct tagPIOPID *p;
1.1.2.1 misho 381:
382: if (!prg)
383: return 0;
384: if (toNum > prg->prog_maxn) {
385: io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
386: return 0;
387: }
388: if (!toNum)
389: toNum = prg->prog_inin;
390:
391: pthread_mutex_lock(&prg->prog_mtx);
392: for (i = array_Size(prg->prog_fds) - 1; prg->prog_cnum > toNum && i > -1; i--)
1.1.2.14 misho 393: if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i) &&
1.1.2.11 misho 394: #ifdef POPEN_STREAM
1.1.2.14 misho 395: (p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
396: kill(p->pid, SIGTERM);
397: usleep(1000);
398: if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
399: kill(p->pid, SIGKILL);
1.1.2.6 misho 400: e_pclose(array(prg->prog_fds, i, FILE*));
1.1.2.11 misho 401: #else
1.1.2.14 misho 402: (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
403: kill(p->pid, SIGTERM);
404: usleep(1000);
405: if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
406: kill(p->pid, SIGKILL);
1.1.2.11 misho 407: e_pclose((int) array(prg->prog_fds, i, intptr_t));
408: #endif
1.1.2.1 misho 409: array_Del(prg->prog_fds, i, 0);
410: prg->prog_cnum--;
411: ret++;
412: }
413: pthread_mutex_unlock(&prg->prog_mtx);
414:
415: return ret;
416: }
1.1.2.7 misho 417:
418: /*
419: * io_progCheck() - Check exit status of program pool
420: *
421: * @prg = program pool
1.1.2.18 misho 422: * @re = resurrect program to init number
1.1.2.7 misho 423: * return: -1 error or >-1 exited programs
424: */
425: int
1.1.2.15 misho 426: io_progCheck(prog_t * __restrict prg, int re)
1.1.2.7 misho 427: {
428: int ret = 0;
429: struct tagPIOPID *p;
430: register int i;
431:
432: if (!prg)
433: return -1;
434:
1.1.2.9 misho 435: pthread_mutex_lock(&prg->prog_mtx);
1.1.2.7 misho 436: for (i = 0; i < array_Size(prg->prog_fds); i++)
437: if (array_Get(prg->prog_fds, i) &&
1.1.2.11 misho 438: #ifdef POPEN_STREAM
1.1.2.22 misho 439: (p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
1.1.2.11 misho 440: #else
1.1.2.22 misho 441: (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
1.1.2.11 misho 442: #endif
1.1.2.20 misho 443: if (waitpid(p->pid, &p->stat, WNOHANG)) {
1.1.2.9 misho 444: clrbit(prg->prog_used, i);
1.1.2.15 misho 445: #ifdef POPEN_STREAM
446: e_pclose(array(prg->prog_fds, i, FILE*));
447: #else
448: e_pclose((int) array(prg->prog_fds, i, intptr_t));
449: #endif
450: array_Del(prg->prog_fds, i, 0);
451: prg->prog_cnum--;
1.1.2.7 misho 452: ret++;
1.1.2.9 misho 453: }
1.1.2.22 misho 454: }
1.1.2.9 misho 455: pthread_mutex_unlock(&prg->prog_mtx);
1.1.2.7 misho 456:
1.1.2.18 misho 457: /* resurrect to init number */
1.1.2.19 misho 458: if (re && ((int) (prg->prog_inin - prg->prog_cnum) > 0))
1.1.2.17 misho 459: io_progOpen(prg, prg->prog_inin - prg->prog_cnum);
1.1.2.15 misho 460:
1.1.2.7 misho 461: return ret;
462: }
1.1.2.9 misho 463:
464: /*
465: * io_progAttach() - Attach to open program
466: *
467: * @prg = program pool
1.1.2.16 misho 468: * @newOne = Execute new one program after attach
1.1.2.9 misho 469: * return: NULL error or !=NULL attached program handle
470: */
1.1.2.11 misho 471: #ifdef POPEN_STREAM
1.1.2.9 misho 472: FILE *
1.1.2.11 misho 473: #else
474: int
475: #endif
1.1.2.16 misho 476: io_progAttach(prog_t * __restrict prg, int newOne)
1.1.2.9 misho 477: {
1.1.2.11 misho 478: #ifdef POPEN_STREAM
1.1.2.9 misho 479: FILE *f = NULL;
1.1.2.11 misho 480: #else
481: int f = -1;
482: #endif
1.1.2.9 misho 483: register int i;
484:
485: if (!prg)
1.1.2.11 misho 486: #ifdef POPEN_STREAM
1.1.2.9 misho 487: return NULL;
1.1.2.11 misho 488: #else
489: return -1;
490: #endif
1.1.2.9 misho 491:
492: pthread_mutex_lock(&prg->prog_mtx);
493: for (i = 0; i < array_Size(prg->prog_fds); i++)
494: if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i)) {
495: setbit(prg->prog_used, i);
1.1.2.11 misho 496: #ifdef POPEN_STREAM
1.1.2.9 misho 497: f = array(prg->prog_fds, i, FILE*);
1.1.2.11 misho 498: #else
499: f = array(prg->prog_fds, i, intptr_t);
500: #endif
1.1.2.9 misho 501: break;
502: }
503: pthread_mutex_unlock(&prg->prog_mtx);
504:
1.1.2.20 misho 505: /* execute new one program */
506: if (newOne) {
507: if (f)
508: io_progOpen(prg, 1);
509: else if ((i = io_progOpen2(prg)) > -1)
510: /* not found free program */
1.1.2.18 misho 511: #ifdef POPEN_STREAM
1.1.2.20 misho 512: f = array(prg->prog_fds, i, FILE*);
1.1.2.18 misho 513: #else
1.1.2.20 misho 514: f = array(prg->prog_fds, i, intptr_t);
1.1.2.18 misho 515: #endif
516: }
517:
1.1.2.9 misho 518: return f;
519: }
520:
521: /*
522: * io_progDetach() - Detch from open program
523: *
524: * @prg= program pool
525: * @pfd = attached program handle
526: * return: none
527: */
528: void
1.1.2.11 misho 529: #ifdef POPEN_STREAM
1.1.2.9 misho 530: io_progDetach(prog_t * __restrict prg, FILE *pfd)
1.1.2.11 misho 531: #else
532: io_progDetach(prog_t * __restrict prg, int pfd)
533: #endif
1.1.2.9 misho 534: {
535: register int i;
536:
537: if (!prg || !pfd)
538: return;
539:
540: pthread_mutex_lock(&prg->prog_mtx);
541: for (i = 0; i < array_Size(prg->prog_fds); i++)
1.1.2.11 misho 542: #ifdef POPEN_STREAM
1.1.2.9 misho 543: if (array(prg->prog_fds, i, FILE*) == pfd) {
1.1.2.11 misho 544: #else
545: if (array(prg->prog_fds, i, intptr_t) == pfd) {
546: #endif
1.1.2.9 misho 547: clrbit(prg->prog_used, i);
548: break;
549: }
550: pthread_mutex_unlock(&prg->prog_mtx);
551: }
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