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