1: #include "global.h"
2:
3:
4: cfg_root_t cfg;
5: sched_root_task_t *root;
6: int Kill, gpio, flg, maxpins, defact, resbut, led = -1;
7: extern char compiled[], compiledby[], compilehost[];
8: char szCfgName[PATH_MAX] = BUTZ_CFG;
9: char szDevName[PATH_MAX] = _PATH_DEVGPIOC"0";
10:
11: static void
12: Usage()
13: {
14: printf( " -= Butz =- Service for board buttons management\n"
15: "=== %s === %s@%s ===\n\n"
16: " Syntax: butz [options] [set_value]\n"
17: "\n"
18: "\t-c <cfgfile>\tConfig file [default: /etc/butz.conf]\n"
19: "\t-d <devname>\tGPIO control device [default: /dev/gpioc]\n"
20: "\n", compiled, compiledby, compilehost);
21: }
22:
23: static int
24: prepareGPIO()
25: {
26: const char *str;
27: struct gpio_pin pin;
28: struct gpio_req req;
29:
30: str = cfg_getAttribute(&cfg, "reset", "default_after");
31: if (str)
32: defact = strtol(str, NULL, 0);
33: str = cfg_getAttribute(&cfg, "reset", "gpio_led_ping");
34: if (str)
35: led = strtol(str, NULL, 0);
36: str = cfg_getAttribute(&cfg, "reset", "gpio_pin");
37: if (!str || maxpins < (resbut = strtol(str, NULL, 0))) {
38: EERROR(EINVAL, "Reset button pin not defined or wrong number!");
39: return -1;
40: }
41:
42: /* switch button pin into input state */
43: pin.gp_pin = resbut;
44: pin.gp_flags = GPIO_PIN_INPUT;
45: if (ioctl(gpio, GPIOSETCONFIG, &pin) == -1)
46: return -1;
47: /* toggle led pin */
48: if (led != -1) {
49: req.gp_pin = led;
50: if (ioctl(gpio, GPIOTOGGLE, &req) == -1) {
51: ESYSERR(0);
52: return -1;
53: }
54: }
55:
56: return 0;
57: }
58:
59: static void *
60: sigHandler(sched_task_t *task)
61: {
62: switch (TASK_VAL(task)) {
63: case SIGHUP:
64: cfgUnloadConfig(&cfg);
65: if (cfgLoadConfig(szCfgName, &cfg)) {
66: ELIBERR(cfg);
67: Kill++;
68: }
69: if (prepareGPIO())
70: Kill++;
71: break;
72: case SIGTERM:
73: Kill++;
74: break;
75: default:
76: EERROR(EINVAL, "Undefined signal %lu!", TASK_VAL(task));
77: break;
78: }
79: taskExit(task, NULL);
80: }
81:
82: static void *
83: execReset(sched_task_t *task)
84: {
85: pid_t pid;
86: const char *str;
87:
88: str = cfg_getAttribute(&cfg, "reset", "click");
89: if (!str)
90: taskExit(task, NULL);
91:
92: if ((pid = fork()) == -1)
93: ESYSERR(0);
94: else if (!pid) {
95: execl(str, str, "click", NULL);
96: ESYSERR(0);
97: _exit(127);
98: }
99:
100: flg ^= flg;
101: taskExit(task, NULL);
102: }
103:
104: static void *
105: execDefault(sched_task_t *task)
106: {
107: pid_t pid;
108: const char *str;
109:
110: str = cfg_getAttribute(&cfg, "reset", "default");
111: if (!str)
112: taskExit(task, NULL);
113:
114: if ((pid = fork()) == -1)
115: ESYSERR(0);
116: else if (!pid) {
117: execl(str, str, "default", NULL);
118: ESYSERR(0);
119: _exit(127);
120: }
121:
122: flg ^= flg;
123: taskExit(task, NULL);
124: }
125:
126: static void *
127: butReset(sched_task_t *task)
128: {
129: struct timespec ts = { 1, 0 };
130: struct gpio_req req;
131:
132: /* check reset button */
133: req.gp_pin = resbut;
134: if (ioctl(gpio, GPIOGET, &req) == -1) {
135: ESYSERR(0);
136: goto end;
137: }
138: /* switch on */
139: if (flg != -1 && !req.gp_value)
140: if (++flg == 1)
141: schedSuspend(TASK_ROOT(task), execReset, NULL, flg, NULL, 0);
142: if (defact && flg >= defact) {
143: schedCancelby(TASK_ROOT(task), taskSUSPEND, CRITERIA_CALL, execReset, NULL);
144: schedEvent(TASK_ROOT(task), execDefault, NULL, flg, NULL, 0);
145: flg = -1;
146: goto end;
147: }
148: if (flg > 0 && req.gp_value)
149: schedResumeby(TASK_ROOT(task), CRITERIA_ID, (void*) 1);
150:
151: /* toggle led pin */
152: if (flg != -1 && led != -1) {
153: req.gp_pin = led;
154: if (ioctl(gpio, GPIOTOGGLE, &req) == -1)
155: ESYSERR(0);
156: }
157: end:
158: schedTimer(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task),
159: ts, TASK_DATA(task), TASK_DATLEN(task));
160: taskExit(task, NULL);
161: }
162:
163:
164: int
165: main(int argc, char **argv)
166: {
167: char ch;
168: pid_t pid;
169: struct timespec ts = { 1, 0 };
170:
171: while ((ch = getopt(argc, argv, "hc:d:")) != -1)
172: switch (ch) {
173: case 'd':
174: strlcpy(szDevName, optarg, sizeof szDevName);
175: break;
176: case 'c':
177: strlcpy(szCfgName, optarg, sizeof szCfgName);
178: break;
179: case 'h':
180: default:
181: Usage();
182: return 1;
183: }
184: argc -= optind;
185: argv += optind;
186:
187: switch ((pid = fork())) {
188: case -1:
189: printf("Error:: failed fork() #%d - %s\n", errno, strerror(errno));
190: return 1;
191: case 0:
192: setsid();
193: chdir("/");
194:
195: gpio = open(_PATH_DEVNULL, O_RDWR);
196: if (gpio > 2) {
197: dup2(gpio, STDIN_FILENO);
198: dup2(gpio, STDOUT_FILENO);
199: dup2(gpio, STDERR_FILENO);
200: close(gpio);
201: }
202: break;
203: default:
204: return 0;
205: }
206:
207: openlog("butz", LOG_PID | LOG_CONS, LOG_DAEMON);
208: gpio = open(szDevName, O_RDONLY);
209: if (gpio == -1) {
210: ESYSERR(0);
211: return 1;
212: }
213: if (ioctl(gpio, GPIOMAXPIN, &maxpins) == -1) {
214: ESYSERR(0);
215: return 1;
216: }
217:
218: if (cfgLoadConfig(szCfgName, &cfg)) {
219: ELIBERR(cfg);
220: close(gpio);
221: return 1;
222: }
223: if (prepareGPIO()) {
224: close(gpio);
225: return 1;
226: }
227: root = schedBegin();
228: if (!root) {
229: ELIBERR(sched);
230: close(gpio);
231: return 1;
232: }
233:
234: schedSignal(root, sigHandler, NULL, SIGHUP, NULL, 0);
235: schedSignal(root, sigHandler, NULL, SIGTERM, NULL, 0);
236: schedTimer(root, butReset, NULL, ts, NULL, 0);
237:
238: schedRun(root, &Kill);
239: schedEnd(&root);
240: cfgUnloadConfig(&cfg);
241: close(gpio);
242: closelog();
243: return 0;
244: }
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