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:
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:
39: prg->prog_fds = array_Init(prg->prog_maxn);
40: if (!prg->prog_fds) {
41: io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
42: e_free(prg->prog_used);
43: e_free(prg);
44: return NULL;
45: }
46:
47: pthread_mutex_init(&prg->prog_mtx, NULL);
48: signal(SIGPIPE, SIG_IGN);
49:
50: if (io_progOpen(prg, prg->prog_inin) < 0) {
51: io_progDestroy(&prg);
52: prg = NULL;
53: }
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:
71: e_free((*pprg)->prog_used);
72: array_Destroy(&(*pprg)->prog_fds);
73: pthread_mutex_destroy(&(*pprg)->prog_mtx);
74: signal(SIGPIPE, SIG_DFL);
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;
92: struct tagPIOPID *p;
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--)
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);
114: #ifdef POPEN_STREAM
115: e_pclose(array(prg->prog_fds, i, FILE*));
116: #else
117: e_pclose((int) array(prg->prog_fds, i, intptr_t));
118: #endif
119: array_Del(prg->prog_fds, i, 0);
120: clrbit(prg->prog_used, i);
121: prg->prog_cnum--;
122: ret++;
123: }
124: pthread_mutex_unlock(&prg->prog_mtx);
125:
126: return ret;
127: }
128:
129: /*
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: /*
176: * io_progOpen() - Execute number of program(s)
177: *
178: * @prg = program pool
179: * @execNum = execute program(s) (0 max)
180: * return: 0 error, >0 executed programs and abs(<0) executed programs with logged error
181: */
182: int
183: io_progOpen(prog_t * __restrict prg, u_int execNum)
184: {
185: #ifdef POPEN_STREAM
186: FILE *f;
187: #else
188: int f;
189: #endif
190: int stat, ret = 0;
191: register int i;
192: pid_t pid;
193:
194: if (!prg)
195: return 0;
196: if (prg->prog_cnum + execNum > prg->prog_maxn) {
197: io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
198: return 0;
199: }
200:
201: pthread_mutex_lock(&prg->prog_mtx);
202: for (i = 0; (execNum ? ret < execNum : 42) && i < array_Size(prg->prog_fds); i++)
203: if (!array_Get(prg->prog_fds, i)) {
204: f = e_popen(prg->prog_name, "r+", &pid);
205: #ifdef POPEN_STREAM
206: if (!f) {
207: #else
208: if (f == -1) {
209: #endif
210: LOGERR;
211: ret = -1;
212: break;
213: } else if (waitpid(pid, &stat, WNOHANG)) {
214: io_SetErr(ECHILD, "Program with pid=%d exit with status %d",
215: pid, WIFEXITED(stat) ? WEXITSTATUS(stat) : -1);
216: ret = -1;
217: break;
218: } else
219: array_Set(prg->prog_fds, i, f);
220: prg->prog_cnum++;
221: ret++;
222: }
223: pthread_mutex_unlock(&prg->prog_mtx);
224:
225: return ret;
226: }
227:
228: /*
229: * io_progGrow() - Execute to number of programs in pool
230: *
231: * @prg = program pool
232: * @toNum = execute to number of programs (0 max)
233: * return: 0 error, >0 executed programs and abs(<0) executed programs with logged error
234: */
235: int
236: io_progGrow(prog_t * __restrict prg, u_int toNum)
237: {
238: if (!prg)
239: return 0;
240: if (toNum > prg->prog_maxn) {
241: io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
242: return 0;
243: }
244: if (!toNum)
245: toNum = prg->prog_maxn;
246:
247: return io_progOpen(prg, toNum - prg->prog_cnum);
248: }
249:
250: /*
251: * io_progVacuum() - Vacuum pool to running number of programs
252: *
253: * @prg = program pool
254: * @toNum = vacuum to number of programs (0 to init number)
255: * return: 0 error or >0 closed programs
256: */
257: int
258: io_progVacuum(prog_t * __restrict prg, u_int toNum)
259: {
260: register int i;
261: int ret = 0;
262: struct tagPIOPID *p;
263:
264: if (!prg)
265: return 0;
266: if (toNum > prg->prog_maxn) {
267: io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
268: return 0;
269: }
270: if (!toNum)
271: toNum = prg->prog_inin;
272:
273: pthread_mutex_lock(&prg->prog_mtx);
274: for (i = array_Size(prg->prog_fds) - 1; prg->prog_cnum > toNum && i > -1; i--)
275: if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i) &&
276: #ifdef POPEN_STREAM
277: (p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
278: kill(p->pid, SIGTERM);
279: usleep(1000);
280: if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
281: kill(p->pid, SIGKILL);
282: e_pclose(array(prg->prog_fds, i, FILE*));
283: #else
284: (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
285: kill(p->pid, SIGTERM);
286: usleep(1000);
287: if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
288: kill(p->pid, SIGKILL);
289: e_pclose((int) array(prg->prog_fds, i, intptr_t));
290: #endif
291: array_Del(prg->prog_fds, i, 0);
292: prg->prog_cnum--;
293: ret++;
294: }
295: pthread_mutex_unlock(&prg->prog_mtx);
296:
297: return ret;
298: }
299:
300: /*
301: * io_progCheck() - Check exit status of program pool
302: *
303: * @prg = program pool
304: * return: -1 error or >-1 exited programs
305: */
306: int
307: io_progCheck(prog_t * __restrict prg)
308: {
309: int ret = 0;
310: struct tagPIOPID *p;
311: register int i;
312:
313: if (!prg)
314: return -1;
315:
316: pthread_mutex_lock(&prg->prog_mtx);
317: for (i = 0; i < array_Size(prg->prog_fds); i++)
318: if (array_Get(prg->prog_fds, i) &&
319: #ifdef POPEN_STREAM
320: (p = pio_pgetpid(array(prg->prog_fds, i, FILE*))))
321: #else
322: (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t))))
323: #endif
324: if (waitpid(p->pid, &p->stat, WNOHANG) > 0) {
325: clrbit(prg->prog_used, i);
326: ret++;
327: }
328: pthread_mutex_unlock(&prg->prog_mtx);
329:
330: return ret;
331: }
332:
333: /*
334: * io_progAttach() - Attach to open program
335: *
336: * @prg = program pool
337: * return: NULL error or !=NULL attached program handle
338: */
339: #ifdef POPEN_STREAM
340: FILE *
341: #else
342: int
343: #endif
344: io_progAttach(prog_t * __restrict prg)
345: {
346: #ifdef POPEN_STREAM
347: FILE *f = NULL;
348: #else
349: int f = -1;
350: #endif
351: register int i;
352:
353: if (!prg)
354: #ifdef POPEN_STREAM
355: return NULL;
356: #else
357: return -1;
358: #endif
359:
360: pthread_mutex_lock(&prg->prog_mtx);
361: for (i = 0; i < array_Size(prg->prog_fds); i++)
362: if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i)) {
363: setbit(prg->prog_used, i);
364: #ifdef POPEN_STREAM
365: f = array(prg->prog_fds, i, FILE*);
366: #else
367: f = array(prg->prog_fds, i, intptr_t);
368: #endif
369: break;
370: }
371: pthread_mutex_unlock(&prg->prog_mtx);
372:
373: return f;
374: }
375:
376: /*
377: * io_progDetach() - Detch from open program
378: *
379: * @prg= program pool
380: * @pfd = attached program handle
381: * return: none
382: */
383: void
384: #ifdef POPEN_STREAM
385: io_progDetach(prog_t * __restrict prg, FILE *pfd)
386: #else
387: io_progDetach(prog_t * __restrict prg, int pfd)
388: #endif
389: {
390: register int i;
391:
392: if (!prg || !pfd)
393: return;
394:
395: pthread_mutex_lock(&prg->prog_mtx);
396: for (i = 0; i < array_Size(prg->prog_fds); i++)
397: #ifdef POPEN_STREAM
398: if (array(prg->prog_fds, i, FILE*) == pfd) {
399: #else
400: if (array(prg->prog_fds, i, intptr_t) == pfd) {
401: #endif
402: clrbit(prg->prog_used, i);
403: break;
404: }
405: pthread_mutex_unlock(&prg->prog_mtx);
406: }
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