1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: aitcli.c,v 1.1.1.1.2.8 2010/04/24 10:05:26 misho Exp $
7: *
8: *************************************************************************/
9: #include "global.h"
10:
11:
12: #pragma GCC visibility push(hidden)
13:
14: cliCommands_t cli_stdCmds[] = {
15: { "test", cli_Cmd_Unsupported, "Test - Don`t use default command structure!", "test <cr>", cli_Comp_Filename },
16: { "-------", NULL, "---------------------", NULL, NULL },
17: { "help", cli_Cmd_Help, "Help screen", "help [command] <cr>", NULL },
18: { "exit", cli_Cmd_Exit, "Exit from console", "exit <cr>", NULL },
19: { NULL, NULL, NULL, NULL }
20: };
21:
22: // ------------------------------------------------
23:
24: int cli_Errno;
25: char cli_Error[STRSIZ];
26:
27: #pragma GCC visibility pop
28:
29:
30: static void cli_Null_Prep_Term(int meta)
31: {
32: }
33:
34: static void cli_Null_Deprep_Term()
35: {
36: }
37:
38: static int cli_Pre_Input_Change_Mode()
39: {
40: return 0;
41: }
42:
43: static int cli_GetC(FILE *dummy)
44: {
45: int ch = rl_getc(stdin);
46:
47: /*
48: if (is_special_char(ch)) {
49: pending_special_char = ch;
50: return '\r';
51: }
52: */
53:
54: return ch;
55: }
56:
57:
58: // cli_GetErrno() Get error code of last operation
59: inline int cli_GetErrno()
60: {
61: return cli_Errno;
62: }
63:
64: // io_GetError() Get error text of last operation
65: inline const char *cli_GetError()
66: {
67: return cli_Error;
68: }
69:
70: // cli_SetErr() Set error to variables for internal use!!!
71: inline void cli_SetErr(int eno, char *estr, ...)
72: {
73: va_list lst;
74:
75: cli_Errno = eno;
76: memset(cli_Error, 0, STRSIZ);
77: va_start(lst, estr);
78: vsnprintf(cli_Error, STRSIZ, estr, lst);
79: va_end(lst);
80: }
81:
82: // ------------------------------------------------------------
83:
84: /*
85: * cli_Printf() Printf CLI features
86: * @out = Output stream
87: * @csFormat = Printf format string
88: * return: -1 error, != -1 printed chars
89: */
90: inline int cli_Printf(FILE *out, const char *csFormat, ...)
91: {
92: va_list lst;
93: int ret;
94:
95: va_start(lst, csFormat);
96:
97: ret = vfprintf(out, csFormat, lst);
98: if (-1 == ret)
99: LOGERR;
100:
101: va_end(lst);
102: return ret;
103: }
104:
105:
106: /*
107: * cliComp() Initialize completion CLI features
108: * @cmdComplete = Completion function
109: * @cmdEntry = Compentry function
110: * return: none
111: */
112: inline void cliComp(cli_Completion_t *cmdComplete, cli_CompEntry_t *cmdEntry)
113: {
114: // command completon
115: rl_attempted_completion_function = cmdComplete;
116: rl_completion_entry_function = cmdEntry;
117: }
118:
119: /*
120: * cliTTY() Initialize I/O TTY CLI features
121: * @term = terminal name
122: * @inp = input handle
123: * @out = output handle
124: * @win = window size
125: * return: -1 error, != -1 ok
126: */
127: inline int cliTTY(const char *term, FILE *inp, FILE *out, struct winsize *win)
128: {
129: if (term)
130: rl_terminal_name = term;
131:
132: if (inp)
133: rl_instream = inp;
134: if (out)
135: rl_outstream = out;
136:
137: if (win)
138: if (ioctl(!rl_outstream ? STDOUT_FILENO : fileno(rl_outstream), TIOCSWINSZ, win) == -1) {
139: LOGERR;
140: return -1;
141: }
142:
143: return 0;
144: }
145:
146: /*
147: * cli_ReadHistory() Read CLI History from file
148: * @csFile = history file name, if NULL default history name is ".aitcli.history"
149: * return: -1 error; != -1 readed ok
150: */
151: inline int cli_ReadHistory(const char *csFile)
152: {
153: return read_history(!csFile ? ".aitcli.history" : csFile);
154: }
155:
156: /*
157: * cli_WriteHistory() Write CLI History to file
158: * @csFile = history file name, if NULL default history name is ".aitcli.history"
159: * @lineNum = save number of history entry lines, if -1 all lines saved without limit
160: * return: -1 error; != -1 readed ok
161: */
162: inline int cli_WriteHistory(const char *csFile, int lineNum)
163: {
164: int ret;
165: const char *psFile = !csFile ? ".aitcli.history" : csFile;
166:
167: ret = write_history(psFile);
168: if (-1 != ret && -1 != lineNum)
169: history_truncate_file(psFile, lineNum);
170:
171: return ret;
172: }
173:
174: /*
175: * cliInit() Initialize Readline
176: * @csProg = program name
177: * return: none
178: */
179: inline void cliInit(const char *csProg)
180: {
181: rl_readline_name = csProg;
182:
183: rl_variable_bind("editing-mode", "emacs");
184: }
185:
186: /*
187: * cliNetInit() Initialize Readline if CLI bind to socket
188: * @csProg = program name
189: * @pty = Master pty
190: * @term = stdin termios
191: * return: none
192: */
193: void cliNetInit(const char *csProg, int pty, struct termios *term)
194: {
195: struct termios t;
196:
197: if (term) {
198: t = *term;
199: // Don`t uncomment this because input chars on CLI socket console will be hidden!!!
200: // t.c_lflag &= ~(ICANON | ISIG | ECHO | ECHOCTL | ECHOE | ECHOK | ECHOKE | ECHONL | ECHOPRT);
201: t.c_iflag &= ~ICRNL;
202: t.c_iflag |= IGNBRK;
203: t.c_cc[VMIN] = 1;
204: t.c_cc[VTIME] = 0;
205: tcsetattr(pty, TCSANOW, &t);
206: }
207:
208: cliInit(csProg);
209:
210: rl_instream = fdopen(pty, "r");
211:
212: rl_prep_term_function = cli_Null_Prep_Term;
213: rl_deprep_term_function = cli_Null_Deprep_Term;
214: rl_pre_input_hook = cli_Pre_Input_Change_Mode;
215:
216: rl_getc_function = cli_GetC;
217:
218: }
219:
220: /*
221: * cliNetExec() Execute net CLI main loop
222: * @cmdList = Commands list
223: * @csPrompt = Prompt text
224: * @sock = client socket
225: * @term = stdin termios
226: * @win = window size of tty
227: * return: -1 error, 0 = exit w/^+D, 1 done.
228: */
229: int cliNetExec(cliCommands_t *cmdList, const char *csPrompt, int sock, struct termios *term, struct winsize *win)
230: {
231: int pty, ret = 0, r, s, alen;
232: fd_set fds;
233: struct timeval tv = { DEFAULT_SOCK_TIMEOUT, 0 };
234: u_char buf[BUFSIZ];
235: struct telnetAttrs *a, Attr[3];
236:
237: switch (forkpty(&pty, NULL, term, win)) {
238: case -1:
239: LOGERR;
240: return -1;
241: case 0:
242: close(sock);
243:
244: cliTTY(NULL, NULL, NULL, win);
245: ret = cliExec(cmdList, csPrompt) < 0 ? 1 : 0;
246: _exit(ret);
247: default:
248: cliNetInit(getprogname(), pty, term);
249:
250: telnet_SetCmd(Attr, DO, TELOPT_TTYPE);
251: telnet_SetCmd(Attr + 1, DO, TELOPT_LINEMODE);
252: telnet_SetCmd(Attr + 2, GA, 0);
253: if ((ret = telnetSend(sock, Attr, 3, NULL, 0, 0)) == -1) {
254: cli_Errno = telnet_GetErrno();
255: strlcpy(cli_Error, telnet_GetError(), STRSIZ);
256: return -1;
257: }
258:
259: while (42) {
260: FD_ZERO(&fds);
261: FD_SET(sock, &fds);
262: FD_SET(pty, &fds);
263: if (select(FD_SETSIZE, &fds, NULL, NULL, &tv) < 1)
264: break;
265:
266: r = FD_ISSET(sock, &fds) ? sock : pty;
267: s = FD_ISSET(sock, &fds) ? pty : sock;
268:
269: if ((ret = telnetRecv(r, &a, &alen, buf, BUFSIZ)) < 0) {
270: if (-2 == ret)
271: continue;
272: // EOF
273: if (-3 == ret)
274: shutdown(r, SHUT_RD);
275: else {
276: cli_Errno = telnet_GetErrno();
277: strlcpy(cli_Error, telnet_GetError(), STRSIZ);
278: }
279: break;
280: }
281: if ((ret = telnetSend(s, NULL, 0, buf, ret, 0)) == -1) {
282: cli_Errno = telnet_GetErrno();
283: strlcpy(cli_Error, telnet_GetError(), STRSIZ);
284: break;
285: }
286:
287: /*
288: if ((ret = read(r, &ch, 1)) < 1) {
289: if (!ret)
290: shutdown(r, SHUT_RD);
291: break;
292: }
293: if (write(s, &ch, 1) == -1)
294: break;
295: */
296: }
297:
298: close(pty);
299: }
300:
301: return ret;
302: }
303:
304: /*
305: * cliExec() Execute CLI main loop
306: * @cmdList = Commands list
307: * @csPrompt = Prompt text
308: * return: -1 error, 0 = exit w/^+D, 1 done.
309: */
310: int cliExec(cliCommands_t *cmdList, const char *csPrompt)
311: {
312: char *line, *s, *t, **app, *items[MAX_PROMPT_ITEMS];
313: int ret = 0;
314: register int i;
315: cliCommands_t *cmd = NULL;
316: FILE *out;
317:
318: inline int inline_help()
319: {
320: cli_Cmd_Help(cmdList ? cmdList : cli_stdCmds, -1, out, NULL);
321: rl_on_new_line();
322: return 0;
323: }
324:
325: char **cli_stdCompletion(const char *text, int start, int end)
326: {
327: register int i;
328: char **matches = NULL;
329:
330: char *cmdCompGet(const char *text, int state)
331: {
332: int len = strlen(text);
333:
334: for (i = state; cmdList[i].cmd_name; i++) {
335: if (strncmp(cmdList[i].cmd_name, "---", 3) &&
336: !strncmp(cmdList[i].cmd_name, text, len))
337: return strdup(cmdList[i].cmd_name);
338: }
339:
340: return NULL;
341: }
342:
343: if (!start)
344: matches = rl_completion_matches(text, cmdCompGet);
345: else
346: for (i = 0; cmdList[i].cmd_name; i++) {
347: if (!cmdList[i].cmd_comp)
348: continue;
349: if (!strncmp(rl_line_buffer, cmdList[i].cmd_name, strlen(cmdList[i].cmd_name)))
350: matches = rl_completion_matches(text, cmdList[i].cmd_comp);
351: }
352:
353: return matches;
354: }
355: char *cli_stdCompEntry(const char *ignore, int invoking_key)
356: {
357: return NULL;
358: }
359:
360: /* --- main body of CLI --- */
361:
362: out = rl_outstream;
363: if (!out)
364: out = stdout;
365:
366: rl_bind_key('?', inline_help);
367: if (!rl_attempted_completion_function)
368: cliComp(cli_stdCompletion, cli_stdCompEntry);
369:
370: do {
371: line = readline(csPrompt);
372: if (!line) { // ^+d
373: cli_Printf(out, "\n");
374: break;
375: }
376: // clear whitespaces
377: for (s = line; isspace(*s); s++);
378: if (*s) {
379: for (t = s + strlen(s) - 1; t > s && isspace(*t); t--);
380: *++t = 0;
381: }
382:
383: if (*s) {
384: add_history(s);
385:
386: memset(items, 0, sizeof(char*) * MAX_PROMPT_ITEMS);
387: for (app = items; app < items + MAX_PROMPT_ITEMS - 1 && (*app = strsep(&s, " \t"));
388: *app ? app++ : app);
389:
390: /*
391: for (i = 0; i < MAX_PROMPT_ITEMS; i++)
392: cli_Printf(out, "i=%d %s\n", i, items[i]);
393: */
394:
395: // exec_cmd ...
396: for (cmd = NULL, i = 0; cmdList[i].cmd_name; i++)
397: if (*items[0] && !strncmp(cmdList[i].cmd_name, items[0], strlen(items[0]))) {
398: cmd = &cmdList[i];
399: break;
400: }
401: if (!cmd) {
402: cli_Printf(out, "Command '%s' not found!\n", items[0]);
403: ret = -1;
404: } else
405: ret = cmd->cmd_func(cmdList, i, out, items);
406: }
407:
408: free(line);
409: } while (ret < 1);
410:
411: return ret;
412: }
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