1 | /* |
---|
2 | * |
---|
3 | * Instantatiate a new terminal shell. |
---|
4 | * |
---|
5 | * Author: |
---|
6 | * |
---|
7 | * WORK: fernando.ruiz@ctv.es |
---|
8 | * HOME: correo@fernando-ruiz.com |
---|
9 | * |
---|
10 | * Thanks at: |
---|
11 | * Chris John |
---|
12 | * |
---|
13 | * $Id$ |
---|
14 | */ |
---|
15 | #ifdef HAVE_CONFIG_H |
---|
16 | #include "config.h" |
---|
17 | #endif |
---|
18 | |
---|
19 | #undef __STRICT_ANSI__ /* fileno() */ |
---|
20 | #include <stdio.h> |
---|
21 | |
---|
22 | #include <rtems.h> |
---|
23 | #include <rtems/error.h> |
---|
24 | #include <rtems/libio.h> |
---|
25 | #include <rtems/libio_.h> |
---|
26 | #include <rtems/system.h> |
---|
27 | #include <rtems/shell.h> |
---|
28 | |
---|
29 | #include <termios.h> |
---|
30 | #include <string.h> |
---|
31 | #include <stdlib.h> |
---|
32 | #include <ctype.h> |
---|
33 | #include <sys/stat.h> |
---|
34 | #include <unistd.h> |
---|
35 | #include <errno.h> |
---|
36 | #include <pwd.h> |
---|
37 | |
---|
38 | /* ----------------------------------------------- * |
---|
39 | * This is a stupidity but is cute. |
---|
40 | * ----------------------------------------------- */ |
---|
41 | rtems_unsigned32 new_rtems_name(char * rtems_name) { |
---|
42 | static char b[5]; |
---|
43 | sprintf(b,"%-4.4s",rtems_name); |
---|
44 | return rtems_build_name(b[0],b[1],b[2],b[3]); |
---|
45 | } |
---|
46 | /* ************************************************************** |
---|
47 | * common linked list of shell commands. |
---|
48 | * Because the help report is very long |
---|
49 | * I have a topic for each command. |
---|
50 | * Help list the topics |
---|
51 | * help [topic] list the commands for the topic |
---|
52 | * help [command] help for the command |
---|
53 | * Can you see help rtems monitor report? |
---|
54 | * ************************************************************** */ |
---|
55 | |
---|
56 | struct shell_topic_tt; |
---|
57 | typedef struct shell_topic_tt shell_topic_t; |
---|
58 | |
---|
59 | struct shell_topic_tt { |
---|
60 | char * topic; |
---|
61 | shell_topic_t * next; |
---|
62 | }; |
---|
63 | |
---|
64 | |
---|
65 | static shell_cmd_t * shell_first_cmd; |
---|
66 | static shell_topic_t * shell_first_topic; |
---|
67 | /* ----------------------------------------------- * |
---|
68 | * Using Chain I can reuse the rtems code. |
---|
69 | * I am more comfortable with this, sorry. |
---|
70 | * ----------------------------------------------- */ |
---|
71 | shell_topic_t * shell_lookup_topic(char * topic) { |
---|
72 | shell_topic_t * shell_topic; |
---|
73 | shell_topic=shell_first_topic; |
---|
74 | while (shell_topic) { |
---|
75 | if (!strcmp(shell_topic->topic,topic)) return shell_topic; |
---|
76 | shell_topic=shell_topic->next; |
---|
77 | }; |
---|
78 | return (shell_topic_t *) NULL; |
---|
79 | } |
---|
80 | /* ----------------------------------------------- */ |
---|
81 | shell_topic_t * shell_add_topic(char * topic) { |
---|
82 | shell_topic_t * current,*aux; |
---|
83 | if (!shell_first_topic) { |
---|
84 | aux=malloc(sizeof(shell_topic_t)); |
---|
85 | aux->topic=topic; |
---|
86 | aux->next=(shell_topic_t*)NULL; |
---|
87 | return shell_first_topic=aux; |
---|
88 | } else { |
---|
89 | current=shell_first_topic; |
---|
90 | if (!strcmp(topic,current->topic)) return current; |
---|
91 | while (current->next) { |
---|
92 | if (!strcmp(topic,current->next->topic)) return current->next; |
---|
93 | current=current->next; |
---|
94 | }; |
---|
95 | aux=malloc(sizeof(shell_topic_t)); |
---|
96 | aux->topic=topic; |
---|
97 | aux->next=(shell_topic_t*)NULL; |
---|
98 | current->next=aux; |
---|
99 | return aux; |
---|
100 | }; |
---|
101 | } |
---|
102 | /* ----------------------------------------------- */ |
---|
103 | shell_cmd_t * shell_lookup_cmd(char * cmd) { |
---|
104 | shell_cmd_t * shell_cmd; |
---|
105 | shell_cmd=shell_first_cmd; |
---|
106 | while (shell_cmd) { |
---|
107 | if (!strcmp(shell_cmd->name,cmd)) return shell_cmd; |
---|
108 | shell_cmd=shell_cmd->next; |
---|
109 | }; |
---|
110 | return (shell_cmd_t *) NULL; |
---|
111 | } |
---|
112 | /* ----------------------------------------------- */ |
---|
113 | shell_cmd_t * shell_add_cmd(char * cmd, |
---|
114 | char * topic, |
---|
115 | char * usage, |
---|
116 | shell_command_t command) { |
---|
117 | int shell_help(int argc,char * argv[]); |
---|
118 | shell_cmd_t * shell_cmd,*shell_pvt; |
---|
119 | if (!shell_first_cmd) { |
---|
120 | shell_first_cmd=(shell_cmd_t *) malloc(sizeof(shell_cmd_t)); |
---|
121 | shell_first_cmd->name ="help"; |
---|
122 | shell_first_cmd->topic ="help"; |
---|
123 | shell_first_cmd->usage ="help [topic] # list of usage of commands"; |
---|
124 | shell_first_cmd->command=shell_help; |
---|
125 | shell_first_cmd->alias =(shell_cmd_t *) NULL; |
---|
126 | shell_first_cmd->next =(shell_cmd_t *) NULL; |
---|
127 | shell_add_topic(shell_first_cmd->topic); |
---|
128 | register_cmds(); |
---|
129 | }; |
---|
130 | if (!cmd) return (shell_cmd_t *) NULL; |
---|
131 | if (!command) return (shell_cmd_t *) NULL; |
---|
132 | shell_cmd=(shell_cmd_t *) malloc(sizeof(shell_cmd_t)); |
---|
133 | shell_cmd->name =cmd; |
---|
134 | shell_cmd->topic =topic; |
---|
135 | shell_cmd->usage =usage; |
---|
136 | shell_cmd->command=command; |
---|
137 | shell_cmd->alias =(shell_cmd_t *) NULL; |
---|
138 | shell_cmd->next =(shell_cmd_t *) NULL; |
---|
139 | shell_add_topic(shell_cmd->topic); |
---|
140 | shell_pvt=shell_first_cmd; |
---|
141 | while (shell_pvt->next) shell_pvt=shell_pvt->next; |
---|
142 | return shell_pvt->next=shell_cmd; |
---|
143 | } |
---|
144 | /* ----------------------------------------------- * |
---|
145 | * you can make an alias for every command. |
---|
146 | * ----------------------------------------------- */ |
---|
147 | shell_cmd_t * shell_alias_cmd(char * cmd, char * alias) { |
---|
148 | shell_cmd_t * shell_cmd,* shell_aux; |
---|
149 | shell_aux=(shell_cmd_t *) NULL; |
---|
150 | if (alias) { |
---|
151 | if ((shell_aux=shell_lookup_cmd(alias))!=NULL) { |
---|
152 | return NULL; |
---|
153 | }; |
---|
154 | if ((shell_cmd=shell_lookup_cmd(cmd))!=NULL) { |
---|
155 | shell_aux=shell_add_cmd(alias,shell_cmd->topic, |
---|
156 | shell_cmd->usage,shell_cmd->command); |
---|
157 | if (shell_aux) shell_aux->alias=shell_cmd; |
---|
158 | }; |
---|
159 | }; |
---|
160 | return shell_aux; |
---|
161 | } |
---|
162 | /* ----------------------------------------------- * |
---|
163 | * Poor but enough.. |
---|
164 | * TODO: Redirection capture. "" evaluate, ... C&S welcome. |
---|
165 | * ----------------------------------------------- */ |
---|
166 | int shell_make_args(char * cmd, |
---|
167 | int * pargc, |
---|
168 | char * argv[]) { |
---|
169 | int argc=0; |
---|
170 | while ((cmd=strtok(cmd," \t\r\n"))!=NULL) { |
---|
171 | argv[argc++]=cmd; |
---|
172 | cmd=(char*)NULL; |
---|
173 | }; |
---|
174 | argv[argc]=(char*)NULL; |
---|
175 | return *pargc=argc; |
---|
176 | } |
---|
177 | /* ----------------------------------------------- * |
---|
178 | * show the help for one command. |
---|
179 | * ----------------------------------------------- */ |
---|
180 | int shell_help_cmd(shell_cmd_t * shell_cmd) { |
---|
181 | char * pc; |
---|
182 | int col,line; |
---|
183 | printf("%-10.10s -",shell_cmd->name); |
---|
184 | col=12; |
---|
185 | line=1; |
---|
186 | if (shell_cmd->alias) { |
---|
187 | printf("is an <alias> for command '%s'",shell_cmd->alias->name); |
---|
188 | } else |
---|
189 | if (shell_cmd->usage) { |
---|
190 | pc=shell_cmd->usage; |
---|
191 | while (*pc) { |
---|
192 | switch(*pc) { |
---|
193 | case '\r':break; |
---|
194 | case '\n':putchar('\n'); |
---|
195 | col=0; |
---|
196 | break; |
---|
197 | default :putchar(*pc); |
---|
198 | col++; |
---|
199 | break; |
---|
200 | }; |
---|
201 | pc++; |
---|
202 | if(col>78) { /* What daring... 78?*/ |
---|
203 | if (*pc) { |
---|
204 | putchar('\n'); |
---|
205 | col=0; |
---|
206 | }; |
---|
207 | }; |
---|
208 | if (!col && *pc) { |
---|
209 | printf(" "); |
---|
210 | col=12;line++; |
---|
211 | }; |
---|
212 | }; |
---|
213 | }; |
---|
214 | puts(""); |
---|
215 | return line; |
---|
216 | } |
---|
217 | /* ----------------------------------------------- * |
---|
218 | * show the help. The first command implemented. |
---|
219 | * Can you see the header of routine? Known? |
---|
220 | * The same with all the commands.... |
---|
221 | * ----------------------------------------------- */ |
---|
222 | int shell_help(int argc,char * argv[]) { |
---|
223 | int col,line,arg; |
---|
224 | shell_topic_t *topic; |
---|
225 | shell_cmd_t * shell_cmd=shell_first_cmd; |
---|
226 | if (argc<2) { |
---|
227 | printf("help: ('r' repeat last cmd - 'e' edit last cmd)\n" |
---|
228 | " TOPIC? The topics are\n"); |
---|
229 | topic=shell_first_topic; |
---|
230 | col=0; |
---|
231 | while (topic) { |
---|
232 | if (!col){ |
---|
233 | col=printf(" %s",topic->topic); |
---|
234 | } else { |
---|
235 | if ((col+strlen(topic->topic)+2)>78){ |
---|
236 | printf("\n"); |
---|
237 | col=printf(" %s",topic->topic); |
---|
238 | } else { |
---|
239 | col+=printf(", %s",topic->topic); |
---|
240 | }; |
---|
241 | }; |
---|
242 | topic=topic->next; |
---|
243 | }; |
---|
244 | printf("\n"); |
---|
245 | return 1; |
---|
246 | }; |
---|
247 | line=0; |
---|
248 | for (arg=1;arg<argc;arg++) { |
---|
249 | if (line>16) { |
---|
250 | printf("Press any key to continue...");getchar(); |
---|
251 | printf("\n"); |
---|
252 | line=0; |
---|
253 | }; |
---|
254 | topic=shell_lookup_topic(argv[arg]); |
---|
255 | if (!topic){ |
---|
256 | if ((shell_cmd=shell_lookup_cmd(argv[arg]))==NULL) { |
---|
257 | printf("help: topic or cmd '%s' not found. Try <help> alone for a list\n",argv[arg]); |
---|
258 | line++; |
---|
259 | } else { |
---|
260 | line+=shell_help_cmd(shell_cmd); |
---|
261 | } |
---|
262 | continue; |
---|
263 | }; |
---|
264 | printf("help: list for the topic '%s'\n",argv[arg]); |
---|
265 | line++; |
---|
266 | while (shell_cmd) { |
---|
267 | if (!strcmp(topic->topic,shell_cmd->topic)) |
---|
268 | line+=shell_help_cmd(shell_cmd); |
---|
269 | if (line>16) { |
---|
270 | printf("Press any key to continue...");getchar(); |
---|
271 | printf("\n"); |
---|
272 | line=0; |
---|
273 | }; |
---|
274 | shell_cmd=shell_cmd->next; |
---|
275 | }; |
---|
276 | }; |
---|
277 | puts(""); |
---|
278 | return 0; |
---|
279 | } |
---|
280 | /* ----------------------------------------------- * |
---|
281 | * TODO: Add improvements. History, edit vi or emacs, ... |
---|
282 | * ----------------------------------------------- */ |
---|
283 | int shell_scanline(char * line,int size,FILE * in,FILE * out) { |
---|
284 | int c,col; |
---|
285 | col=0; |
---|
286 | if (*line) { |
---|
287 | col=strlen(line); |
---|
288 | if (out) fprintf(out,"%s",line); |
---|
289 | }; |
---|
290 | tcdrain(fileno(in )); |
---|
291 | tcdrain(fileno(out)); |
---|
292 | for (;;) { |
---|
293 | line[col]=0; |
---|
294 | c=fgetc(in); |
---|
295 | switch (c) { |
---|
296 | case 0x04:/*Control-d*/ |
---|
297 | if (col) break; |
---|
298 | case EOF :return 0; |
---|
299 | case '\n':break; |
---|
300 | case '\f':if (out) fputc('\f',out); |
---|
301 | case 0x03:/*Control-C*/ |
---|
302 | line[0]=0; |
---|
303 | case '\r':if (out) fputc('\n',out); |
---|
304 | return 1; |
---|
305 | case 127: |
---|
306 | case '\b':if (col) { |
---|
307 | if (out) { |
---|
308 | fputc('\b',out); |
---|
309 | fputc(' ',out); |
---|
310 | fputc('\b',out); |
---|
311 | }; |
---|
312 | col--; |
---|
313 | } else { |
---|
314 | if (out) fputc('\a',out); |
---|
315 | }; |
---|
316 | break; |
---|
317 | default :if (!iscntrl(c)) { |
---|
318 | if (col<size-1) { |
---|
319 | line[col++]=c; |
---|
320 | if (out) fputc(c,out); |
---|
321 | } else { |
---|
322 | if (out) fputc('\a',out); |
---|
323 | }; |
---|
324 | } else { |
---|
325 | if (out) |
---|
326 | if (c=='\a') fputc('\a',out); |
---|
327 | }; |
---|
328 | break; |
---|
329 | }; |
---|
330 | }; |
---|
331 | } |
---|
332 | /* ----------------------------------------------- * |
---|
333 | * - The shell TASK |
---|
334 | * Poor but enough.. |
---|
335 | * TODO: Redirection. Tty Signals. ENVVARs. Shell language. |
---|
336 | * ----------------------------------------------- */ |
---|
337 | shell_env_t global_shell_env , |
---|
338 | * current_shell_env=&global_shell_env; |
---|
339 | |
---|
340 | extern char **environ; |
---|
341 | |
---|
342 | void cat_file(FILE * out,char * name) { |
---|
343 | FILE * fd; |
---|
344 | int c; |
---|
345 | if (out) { |
---|
346 | fd=fopen(name,"r"); |
---|
347 | if (fd) { |
---|
348 | while ((c=fgetc(fd))!=EOF) fputc(c,out); |
---|
349 | fclose(fd); |
---|
350 | }; |
---|
351 | }; |
---|
352 | } |
---|
353 | |
---|
354 | void write_file(char * name,char * content) { |
---|
355 | FILE * fd; |
---|
356 | fd=fopen(name,"w"); |
---|
357 | if (fd) { |
---|
358 | fwrite(content,1,strlen(content),fd); |
---|
359 | fclose(fd); |
---|
360 | }; |
---|
361 | } |
---|
362 | |
---|
363 | void init_issue(void) { |
---|
364 | static char issue_inited=FALSE; |
---|
365 | struct stat buf; |
---|
366 | if (issue_inited) return; |
---|
367 | issue_inited=TRUE; |
---|
368 | getpwnam("root"); /* dummy call to init /etc dir */ |
---|
369 | if (stat("/etc/issue",&buf)) |
---|
370 | write_file("/etc/issue", |
---|
371 | "Welcome to @V\\n" |
---|
372 | "Login into @S(@L)\\n"); |
---|
373 | if (stat("/etc/issue.net",&buf)) |
---|
374 | write_file("/etc/issue.net", |
---|
375 | "Welcome to %v\n" |
---|
376 | "running on %m\n"); |
---|
377 | } |
---|
378 | |
---|
379 | int shell_login(FILE * in,FILE * out) { |
---|
380 | FILE * fd; |
---|
381 | int c; |
---|
382 | time_t t; |
---|
383 | int times; |
---|
384 | char name[128]; |
---|
385 | char pass[128]; |
---|
386 | struct passwd * passwd; |
---|
387 | init_issue(); |
---|
388 | setuid(0); |
---|
389 | setgid(0); |
---|
390 | rtems_current_user_env->euid= |
---|
391 | rtems_current_user_env->egid=0; |
---|
392 | if (out) { |
---|
393 | if((current_shell_env->devname[5]!='p')|| |
---|
394 | (current_shell_env->devname[6]!='t')|| |
---|
395 | (current_shell_env->devname[7]!='y')) { |
---|
396 | fd=fopen("/etc/issue","r"); |
---|
397 | if (fd) { |
---|
398 | while ((c=fgetc(fd))!=EOF) { |
---|
399 | if (c=='@') { |
---|
400 | switch(c=fgetc(fd)) { |
---|
401 | case 'L':fprintf(out,"%s",current_shell_env->devname); |
---|
402 | break; |
---|
403 | case 'B':fprintf(out,"0"); |
---|
404 | break; |
---|
405 | case 'T': |
---|
406 | case 'D':time(&t); |
---|
407 | fprintf(out,"%s",ctime(&t)); |
---|
408 | break; |
---|
409 | case 'S':fprintf(out,"RTEMS"); |
---|
410 | break; |
---|
411 | case 'V':fprintf(out,"%s\n%s",_RTEMS_version,_Copyright_Notice); |
---|
412 | break; |
---|
413 | case '@':fprintf(out,"@"); |
---|
414 | break; |
---|
415 | default :fprintf(out,"@%c",c); |
---|
416 | break; |
---|
417 | }; |
---|
418 | } else |
---|
419 | if (c=='\\') { |
---|
420 | switch(c=fgetc(fd)) { |
---|
421 | case '\\':fprintf(out,"\\"); |
---|
422 | break; |
---|
423 | case 'b':fprintf(out,"\b"); break; |
---|
424 | case 'f':fprintf(out,"\f"); break; |
---|
425 | case 'n':fprintf(out,"\n"); break; |
---|
426 | case 'r':fprintf(out,"\r"); break; |
---|
427 | case 's':fprintf(out," "); break; |
---|
428 | case 't':fprintf(out,"\t"); break; |
---|
429 | case '@':fprintf(out,"@"); break; |
---|
430 | }; |
---|
431 | } else { |
---|
432 | fputc(c,out); |
---|
433 | }; |
---|
434 | }; |
---|
435 | fclose(fd); |
---|
436 | } |
---|
437 | } else { |
---|
438 | fd=fopen("/etc/issue.net","r"); |
---|
439 | if (fd) { |
---|
440 | while ((c=fgetc(fd))!=EOF) { |
---|
441 | if (c=='%') { |
---|
442 | switch(c=fgetc(fd)) { |
---|
443 | case 't':fprintf(out,"%s",current_shell_env->devname); |
---|
444 | break; |
---|
445 | case 'h':fprintf(out,"0"); |
---|
446 | break; |
---|
447 | case 'D':fprintf(out," "); |
---|
448 | break; |
---|
449 | case 'd':time(&t); |
---|
450 | fprintf(out,"%s",ctime(&t)); |
---|
451 | break; |
---|
452 | case 's':fprintf(out,"RTEMS"); |
---|
453 | break; |
---|
454 | case 'm':fprintf(out,"(" CPU_NAME "/" CPU_MODEL_NAME ")"); |
---|
455 | break; |
---|
456 | case 'r':fprintf(out,_RTEMS_version); |
---|
457 | break; |
---|
458 | case 'v':fprintf(out,"%s\n%s",_RTEMS_version,_Copyright_Notice); |
---|
459 | break; |
---|
460 | case '%':fprintf(out,"%%"); |
---|
461 | break; |
---|
462 | default :fprintf(out,"%%%c",c); |
---|
463 | break; |
---|
464 | }; |
---|
465 | } else { |
---|
466 | fputc(c,out); |
---|
467 | }; |
---|
468 | }; |
---|
469 | fclose(fd); |
---|
470 | } |
---|
471 | }; |
---|
472 | }; |
---|
473 | times=0; |
---|
474 | strcpy(name,""); |
---|
475 | strcpy(pass,""); |
---|
476 | for (;;) { |
---|
477 | times++; |
---|
478 | if (times>3) break; |
---|
479 | if (out) fprintf(out,"\nlogin: "); |
---|
480 | if (!shell_scanline(name,sizeof(name),in,out )) break; |
---|
481 | if (out) fprintf(out,"Password: "); |
---|
482 | if (!shell_scanline(pass,sizeof(pass),in,NULL)) break; |
---|
483 | if (out) fprintf(out,"\n"); |
---|
484 | if ((passwd=getpwnam(name))) { |
---|
485 | if (strcmp(passwd->pw_passwd,"!")) { /* valid user */ |
---|
486 | setuid(passwd->pw_uid); |
---|
487 | setgid(passwd->pw_gid); |
---|
488 | rtems_current_user_env->euid= |
---|
489 | rtems_current_user_env->egid=0; |
---|
490 | chown(current_shell_env->devname,passwd->pw_uid,0); |
---|
491 | rtems_current_user_env->euid=passwd->pw_uid; |
---|
492 | rtems_current_user_env->egid=passwd->pw_gid; |
---|
493 | if (!strcmp(passwd->pw_passwd,"*")) { |
---|
494 | /* /etc/shadow */ |
---|
495 | return 0; |
---|
496 | } else { |
---|
497 | /* crypt() */ |
---|
498 | return 0; |
---|
499 | }; |
---|
500 | }; |
---|
501 | }; |
---|
502 | if (out) fprintf(out,"Login incorrect\n"); |
---|
503 | strcpy(name,""); |
---|
504 | strcpy(pass,""); |
---|
505 | }; |
---|
506 | return -1; |
---|
507 | } |
---|
508 | |
---|
509 | rtems_task shell_shell(rtems_task_argument task_argument) { |
---|
510 | |
---|
511 | shell_env_t * shell_env =(shell_env_t*) task_argument; |
---|
512 | shell_cmd_t * shell_cmd; |
---|
513 | |
---|
514 | rtems_status_code sc; |
---|
515 | |
---|
516 | struct termios term; |
---|
517 | char * devname; |
---|
518 | |
---|
519 | char curdir[256]; |
---|
520 | char cmd[256]; |
---|
521 | char last_cmd[256]; /* to repeat 'r' */ |
---|
522 | int argc; |
---|
523 | char * argv[128]; |
---|
524 | |
---|
525 | sc=rtems_task_variable_add(RTEMS_SELF,(void*)¤t_shell_env,free); |
---|
526 | if (sc!=RTEMS_SUCCESSFUL) { |
---|
527 | rtems_error(sc,"rtems_task_variable_add(current_shell_env):"); |
---|
528 | rtems_task_delete(RTEMS_SELF); |
---|
529 | }; |
---|
530 | |
---|
531 | current_shell_env=shell_env; |
---|
532 | |
---|
533 | sc=rtems_libio_set_private_env(); |
---|
534 | if (sc!=RTEMS_SUCCESSFUL) { |
---|
535 | rtems_error(sc,"rtems_libio_set_private_env():"); |
---|
536 | rtems_task_delete(RTEMS_SELF); |
---|
537 | }; |
---|
538 | |
---|
539 | |
---|
540 | devname=shell_env->devname; |
---|
541 | setuid(0); |
---|
542 | setgid(0); |
---|
543 | rtems_current_user_env->euid= |
---|
544 | rtems_current_user_env->egid=0; |
---|
545 | |
---|
546 | stdin =fopen(devname,"r+"); |
---|
547 | |
---|
548 | if (!stdin) { |
---|
549 | fprintf(stderr,"shell:unable to open stdin.%s:%s\n",devname,strerror(errno)); |
---|
550 | rtems_task_delete(RTEMS_SELF); |
---|
551 | }; |
---|
552 | setvbuf(stdin,NULL,_IONBF,0); /* Not buffered*/ |
---|
553 | /* make a raw terminal,Linux MANuals */ |
---|
554 | if (tcgetattr (fileno(stdin), &term)>=0) { |
---|
555 | term.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON); |
---|
556 | term.c_oflag &= ~OPOST; |
---|
557 | term.c_oflag |= (OPOST|ONLCR); /* But with cr+nl on output */ |
---|
558 | term.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
---|
559 | term.c_cflag = CLOCAL | CREAD |(shell_env->tcflag); |
---|
560 | term.c_cc[VMIN] = 1; |
---|
561 | term.c_cc[VTIME] = 0; |
---|
562 | if (tcsetattr (fileno(stdin), TCSADRAIN, &term) < 0) { |
---|
563 | fprintf(stderr,"shell:cannot set terminal attributes(%s)\n",devname); |
---|
564 | }; |
---|
565 | stdout=fopen(devname,"r+"); |
---|
566 | if (!stdout) { |
---|
567 | fprintf(stderr,"shell:unable to open stdout.%s:%s\n",devname,strerror(errno)); |
---|
568 | }; |
---|
569 | setvbuf(stdout,NULL,_IONBF,0); /* Not buffered*/ |
---|
570 | stderr=fopen(devname,"r+"); |
---|
571 | if (!stderr) { |
---|
572 | printf("shell:unable to open stderr.%s:%s\n",devname,strerror(errno)); |
---|
573 | }; |
---|
574 | /* when the future user environment runs ok |
---|
575 | * a freopen() reopens the terminals. Now this don't work |
---|
576 | * (sorry but you can't use because FILENO_STDIN!=0. Better fileno(stdin)) |
---|
577 | */ |
---|
578 | }; |
---|
579 | shell_add_cmd(NULL,NULL,NULL,NULL); /* init the chain list*/ |
---|
580 | do { |
---|
581 | /* Set again root user and root filesystem, side effect of set_priv..*/ |
---|
582 | sc=rtems_libio_set_private_env(); |
---|
583 | if (sc!=RTEMS_SUCCESSFUL) { |
---|
584 | rtems_error(sc,"rtems_libio_set_private_env():"); |
---|
585 | rtems_task_delete(RTEMS_SELF); |
---|
586 | }; |
---|
587 | if (!shell_login(stdin,stdout)) { |
---|
588 | cat_file(stdout,"/etc/motd"); |
---|
589 | strcpy(last_cmd,""); |
---|
590 | strcpy(cmd,""); |
---|
591 | printf("\n" |
---|
592 | "RTEMS SHELL (Ver.1.0-FRC):%s. "__DATE__". 'help' to list commands.\n",devname); |
---|
593 | chdir("/"); /* XXX: chdir to getpwent homedir */ |
---|
594 | shell_env->exit_shell=FALSE; |
---|
595 | for (;;) { |
---|
596 | /* Prompt section */ |
---|
597 | /* XXX: show_prompt user adjustable */ |
---|
598 | getcwd(curdir,sizeof(curdir)); |
---|
599 | printf("%s [%s] %c ",shell_env->taskname,curdir,geteuid()?'$':'#'); |
---|
600 | /* getcmd section */ |
---|
601 | if (!shell_scanline(cmd,sizeof(cmd),stdin,stdout)) break; /*EOF*/ |
---|
602 | /* evaluate cmd section */ |
---|
603 | if (!strcmp(cmd,"e")) { /* edit last command */ |
---|
604 | strcpy(cmd,last_cmd); |
---|
605 | continue; |
---|
606 | } else |
---|
607 | if (!strcmp(cmd,"r")) { /* repeat last command */ |
---|
608 | strcpy(cmd,last_cmd); |
---|
609 | } else |
---|
610 | if (strcmp(cmd,"")) { /* only for get a new prompt */ |
---|
611 | strcpy(last_cmd,cmd); |
---|
612 | }; |
---|
613 | /* exec cmd section */ |
---|
614 | /* TODO: |
---|
615 | * To avoid user crash catch the signals. |
---|
616 | * Open a new stdio files with posibility of redirection * |
---|
617 | * Run in a new shell task background. (unix &) |
---|
618 | * Resuming. A little bash. |
---|
619 | */ |
---|
620 | if (shell_make_args(cmd,&argc,argv)) { |
---|
621 | if ((shell_cmd=shell_lookup_cmd(argv[0]))!=NULL) { |
---|
622 | shell_env->errorlevel=shell_cmd->command(argc,argv); |
---|
623 | } else { |
---|
624 | printf("shell:%s command not found\n",argv[0]); |
---|
625 | shell_env->errorlevel=-1; |
---|
626 | }; |
---|
627 | }; |
---|
628 | /* end exec cmd section */ |
---|
629 | if (shell_env->exit_shell) break; |
---|
630 | cmd[0]=0; |
---|
631 | }; |
---|
632 | printf("\nGoodbye from RTEMS SHELL :-(\n"); |
---|
633 | }; |
---|
634 | } while (shell_env->forever); |
---|
635 | fclose(stdin ); |
---|
636 | fclose(stdout); |
---|
637 | fclose(stderr); |
---|
638 | rtems_task_delete(RTEMS_SELF); |
---|
639 | } |
---|
640 | /* ----------------------------------------------- */ |
---|
641 | rtems_status_code shell_init (char * task_name, |
---|
642 | rtems_unsigned32 task_stacksize, |
---|
643 | rtems_task_priority task_priority, |
---|
644 | char * devname, |
---|
645 | tcflag_t tcflag, |
---|
646 | int forever) { |
---|
647 | rtems_id task_id; |
---|
648 | rtems_status_code sc; |
---|
649 | shell_env_t * shell_env; |
---|
650 | sc=rtems_task_create(new_rtems_name(task_name), |
---|
651 | task_priority, |
---|
652 | task_stacksize?task_stacksize:RTEMS_MINIMUM_STACK_SIZE, |
---|
653 | RTEMS_DEFAULT_MODES, |
---|
654 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
655 | &task_id); |
---|
656 | if (sc!=RTEMS_SUCCESSFUL) { |
---|
657 | rtems_error(sc,"creating task %s in shell_init()",task_name); |
---|
658 | return sc; |
---|
659 | }; |
---|
660 | shell_env=malloc(sizeof(shell_env_t)); |
---|
661 | if (!shell_env) { |
---|
662 | rtems_task_delete(task_id); |
---|
663 | sc=RTEMS_NO_MEMORY; |
---|
664 | rtems_error(sc,"allocating shell_env %s in shell_init()",task_name); |
---|
665 | return sc; |
---|
666 | }; |
---|
667 | if (global_shell_env.magic!=new_rtems_name("SENV")) { |
---|
668 | global_shell_env.magic =new_rtems_name("SENV"); |
---|
669 | global_shell_env.devname ="/dev/console"; |
---|
670 | global_shell_env.taskname ="GLOBAL"; |
---|
671 | global_shell_env.tcflag =0; |
---|
672 | global_shell_env.exit_shell=0; |
---|
673 | global_shell_env.forever =TRUE; |
---|
674 | }; |
---|
675 | shell_env->magic =global_shell_env.magic; |
---|
676 | shell_env->devname =devname; |
---|
677 | shell_env->taskname =task_name; |
---|
678 | shell_env->tcflag =tcflag; |
---|
679 | shell_env->exit_shell=FALSE; |
---|
680 | shell_env->forever =forever; |
---|
681 | return rtems_task_start(task_id,shell_shell,(rtems_task_argument) shell_env); |
---|
682 | } |
---|