shell.c

   1 #include "cache.h"
   2 #include "quote.h"
   3
   4 static int do_generic_cmd(const char *me, char *arg)
   5 {
   6         const char *my_argv[4];
   7
   8         arg = sq_dequote(arg);
   9         if (!arg)
  10                 die("bad argument");
  11
  12         my_argv[0] = me;
  13         my_argv[1] = arg;
  14         my_argv[2] = NULL;
  15
  16         return execvp(me, (char**) my_argv);
  17 }
  18
  19 static struct commands {
  20         const char *name;
  21         int (*exec)(const char *me, char *arg);
  22 } cmd_list[] = {
  23         { "git-receive-pack", do_generic_cmd },
  24         { "git-upload-pack", do_generic_cmd },
  25         { NULL },
  26 };
  27
  28 int main(int argc, char **argv)
  29 {
  30         char *prog;
  31         struct commands *cmd;
  32
  33         /* We want to see "-c cmd args", and nothing else */
  34         if (argc != 3 || strcmp(argv[1], "-c"))
  35                 die("What do you think I am? A shell?");
  36
  37         prog = argv[2];
  38         argv += 2;
  39         argc -= 2;
  40         for (cmd = cmd_list ; cmd->name ; cmd++) {
  41                 int len = strlen(cmd->name);
  42                 char *arg;
  43                 if (strncmp(cmd->name, prog, len))
  44                         continue;
  45                 arg = NULL;
  46                 switch (prog[len]) {
  47                 case '\0':
  48                         arg = NULL;
  49                         break;
  50                 case ' ':
  51                         arg = prog + len + 1;
  52                         break;
  53                 default:
  54                         continue;
  55                 }
  56                 exit(cmd->exec(cmd->name, arg));
  57         }
  58         die("unrecognized command '%s'", prog);
  59 }