interactive.c

   1 #include "adu.h"
   2 #include "string.h"
   3 #include "error.h"
   4 #include "cmdline.h"
   5 #include "select.cmdline.h"
   6
   7 struct select_args_info select_conf;
   8
   9 struct interactive_command {
  10         const char *name;
  11         int (*handler)(char *);
  12 };
  13
  14 #define INTERACTIVE_COMMANDS \
  15         INTERACTIVE_COMMAND(dump) \
  16         INTERACTIVE_COMMAND(set) \
  17         INTERACTIVE_COMMAND(def) \
  18
  19 #define INTERACTIVE_COMMAND(name) \
  20         static int icom_ ## name (char *line);
  21
  22 INTERACTIVE_COMMANDS
  23
  24 #undef INTERACTIVE_COMMAND
  25
  26 #define INTERACTIVE_COMMAND(_name) \
  27         { \
  28         .name = #_name, \
  29         .handler = icom_ ## _name \
  30         },
  31
  32 struct interactive_command icmds[] = {
  33         INTERACTIVE_COMMANDS
  34         {.name  = NULL}
  35 };
  36
  37 static int read_input_line(char *line, size_t size)
  38 {
  39         return fgets(line, size, stdin)? 1 : -1;
  40 }
  41
  42 static int icom_def(__a_unused char *line)
  43 {
  44         select_cmdline_parser_init(&select_conf);
  45         return 1;
  46 }
  47
  48 static int icom_set(char *line)
  49 {
  50         struct select_cmdline_parser_params params = {
  51                 .override = 1,
  52                 .initialize = 0,
  53                 .check_required = 1,
  54                 .check_ambiguity = 0,
  55                 .print_errors = 1
  56         };
  57         return select_cmdline_parser_string_ext(line, &select_conf, "select",
  58                 &params)?
  59                 -E_SYNTAX : 1;
  60 }
  61
  62 static int icom_dump(__a_unused char *line)
  63 {
  64         ERROR_LOG("dump: %s\n", select_conf.format_arg);
  65         select_cmdline_parser_dump(stdout, &select_conf);
  66         return 1;
  67 }
  68
  69 static int exec_interactive_command(char *line)
  70 {
  71         const char const *delim = "\t\n ";
  72         int i;
  73         char *cmd = adu_strdup(line + strspn(line, delim));
  74         char *p = cmd + strcspn(cmd, delim);
  75         int ret = -E_SYNTAX;
  76
  77         *p = '\0';
  78         p++;
  79         for (i = 0; icmds[i].name; i++) {
  80                 ERROR_LOG("name: %s, cmd: %s.\n", icmds[i].name, cmd);
  81                 if (strcmp(icmds[i].name, cmd))
  82                         continue;
  83                 ERROR_LOG("exec cmd: %s, args: %s\n", cmd, p);
  84                 ret = icmds[i].handler(p);
  85                 break;
  86         }
  87         free(cmd);
  88         return ret;
  89 }
  90
  91 int com_interactive(void)
  92 {
  93         char line[255];
  94         int ret = 1;
  95
  96         while (read_input_line(line, sizeof(line)) >= 0) {
  97                 size_t len = strlen(line);
  98                 if (!len)
  99                         continue;
 100                 if (line[len - 1] == '\n')
 101                         line[len - 1] = '\0';
 102                 ret = exec_interactive_command(line);
 103                 if (ret < 0)
 104                         printf("%s\n", adu_strerror(-ret));
 105         }
 106         return ret;
 107 }