nissy-classic

Stable branch of nissy
git clone https://git.tronto.net/nissy-classic
Download | Log | Files | Refs | README | LICENSE

shell.c (3035B)

      1 #include "shell.h"
      2 
      3 static void             cleanwhitespaces(char *line);
      4 static int              parseline(char *line, char **v);
      5 
      6 bool
      7 checkfiles(void)
      8 {
      9 	/* TODO: add more checks (other files, use checksum...) */
     10 	FILE *f;
     11 	char fname[strlen(tabledir)+100];
     12 	int i;
     13 
     14 	for (i = 0; all_pd[i] != NULL; i++) {
     15 		strcpy(fname, tabledir);
     16 		strcat(fname, "/");
     17 		strcat(fname, all_pd[i]->filename);
     18 		if ((f = fopen(fname, "rb")) == NULL)
     19 			return false;
     20 		else
     21 			fclose(f);
     22 	}
     23 
     24 	return true;
     25 }
     26 
     27 static void
     28 cleanwhitespaces(char *line)
     29 {
     30 	char *i;
     31 
     32 	for (i = line; *i != 0; i++)
     33 		if (*i == '\t' || *i == '\n')
     34 			*i = ' ';
     35 }
     36 
     37 /* This function assumes that **v is large enough */
     38 static int
     39 parseline(char *line, char **v)
     40 {
     41 	char *t;
     42 	int n = 0;
     43 	
     44 	cleanwhitespaces(line);
     45 
     46 	for (t = strtok(line, " "); t != NULL; t = strtok(NULL, " "))
     47 		strcpy(v[n++], t);
     48 
     49 	return n;
     50 }
     51 
     52 void
     53 exec_args(int c, char **v)
     54 {
     55 	int i;
     56 	char line[MAXLINELEN];
     57 	Command *cmd = NULL;
     58 	CommandArgs *args;
     59 	Alg *scramble;
     60 
     61 	for (i = 0; commands[i] != NULL; i++)
     62 		if (!strcmp(v[0], commands[i]->name))
     63 			cmd = commands[i];
     64 
     65 	if (cmd == NULL) {
     66 		fprintf(stderr, "%s: command not found\n", v[0]);
     67 		return;
     68 	}
     69 
     70 	args = cmd->parse_args(c-1, &v[1]);
     71 	if (!args->success) {
     72 		fprintf(stderr, "usage: %s\n", cmd->usage);
     73 		goto exec_args_end;
     74 	}
     75 
     76 	if (args->scrstdin) {
     77 		while (true) {
     78 			if (fgets(line, MAXLINELEN, stdin) == NULL) {
     79 				clearerr(stdin);
     80 				break;
     81 			}
     82 			
     83 			scramble = new_alg(line);
     84 
     85 			printf(">>> Line: %s", line);
     86 
     87 			if (scramble != NULL && scramble->len > 0) {
     88 				args->scramble = scramble;
     89 				cmd->exec(args);
     90 				free_alg(scramble);
     91 				args->scramble = NULL;
     92 			} 
     93 			fflush(stdout);
     94 		}
     95 	} else {
     96 		cmd->exec(args);
     97 	}
     98 
     99 exec_args_end:
    100 	free_args(args);
    101 }
    102 
    103 void
    104 launch(bool batchmode)
    105 {
    106 	int i, shell_argc;
    107 	char line[MAXLINELEN], **shell_argv;
    108 
    109 	shell_argv = malloc(MAXNTOKENS * sizeof(char *));
    110 	for (i = 0; i < MAXNTOKENS; i++)
    111 		shell_argv[i] = malloc((MAXTOKENLEN+1) * sizeof(char));
    112 
    113 	if (!batchmode) {
    114 		fprintf(stderr, "Welcome to Nissy "VERSION".\n"
    115 				"Type \"commands\" for a list of commands.\n");
    116 	}
    117 
    118 	while (true) {
    119 		if (!batchmode) {
    120 			fprintf(stdout, "nissy-# ");
    121 		}
    122 
    123 		if (fgets(line, MAXLINELEN, stdin) == NULL)
    124 			break;
    125 
    126 		if (batchmode) {
    127 			printf(">>>\n"
    128 			       ">>> Executing command: %s"
    129 			       ">>>\n", line);
    130 		}
    131 
    132 		shell_argc = parseline(line, shell_argv);
    133 
    134 		if (shell_argc > 0)
    135 			exec_args(shell_argc, shell_argv);
    136 
    137 		fflush(stdout);
    138 	}
    139 
    140 	for (i = 0; i < MAXNTOKENS; i++)
    141 		free(shell_argv[i]);
    142 	free(shell_argv);
    143 }
    144 
    145 int
    146 main(int argc, char *argv[])
    147 {
    148 	char *closing_cmd[1] = { "freemem" };
    149 
    150 	init_env();
    151 
    152 	if (!checkfiles()) {
    153 		fprintf(stderr,
    154 			"--- Warning ---\n"
    155 			"Some pruning tables are missing or unreadable\n"
    156 			"You can generate them with `nissy gen'.\n"
    157 			"---------------\n\n"
    158 		);
    159 	}
    160 
    161 	if (argc > 1) {
    162 		if (!strcmp(argv[1], "-b")) {
    163 			launch(true);
    164 		} else {
    165 			exec_args(argc-1, &argv[1]);
    166 		}
    167 	} else {
    168 		launch(false);
    169 	}
    170 
    171 	exec_args(1, closing_cmd);
    172 
    173 	return 0;
    174 }