shell.c

   1 #include "cache.h"
   2 #include "quote.h"
   3 #include "exec_cmd.h"
   4 #include "strbuf.h"
   5
   6 static int do_generic_cmd(const char *me, char *arg)
   7 {
   8         const char *my_argv[4];
   9
  10         if (!arg || !(arg = sq_dequote(arg)))
  11                 die("bad argument");
  12         if (prefixcmp(me, "git-"))
  13                 die("bad command");
  14
  15         my_argv[0] = me + 4;
  16         my_argv[1] = arg;
  17         my_argv[2] = NULL;
  18
  19         return execv_git_cmd(my_argv);
  20 }
  21
  22 static int do_cvs_cmd(const char *me, char *arg)
  23 {
  24         const char *cvsserver_argv[3] = {
  25                 "cvsserver", "server", NULL
  26         };
  27
  28         if (!arg || strcmp(arg, "server"))
  29                 die("git-cvsserver only handles server: %s", arg);
  30
  31         setup_path(NULL);
  32
  33         return execv_git_cmd(cvsserver_argv);
  34 }
  35
  36
  37 static struct commands {
  38         const char *name;
  39         int (*exec)(const char *me, char *arg);
  40 } cmd_list[] = {
  41         { "git-receive-pack", do_generic_cmd },
  42         { "git-upload-pack", do_generic_cmd },
  43         { "cvs", do_cvs_cmd },
  44         { NULL },
  45 };
  46
  47 int main(int argc, char **argv)
  48 {
  49         char *prog;
  50         struct commands *cmd;
  51
  52         if (argc == 2 && !strcmp(argv[1], "cvs server"))
  53                 argv--;
  54         /* We want to see "-c cmd args", and nothing else */
  55         else if (argc != 3 || strcmp(argv[1], "-c"))
  56                 die("What do you think I am? A shell?");
  57
  58         prog = argv[2];
  59         argv += 2;
  60         argc -= 2;
  61         for (cmd = cmd_list ; cmd->name ; cmd++) {
  62                 int len = strlen(cmd->name);
  63                 char *arg;
  64                 if (strncmp(cmd->name, prog, len))
  65                         continue;
  66                 arg = NULL;
  67                 switch (prog[len]) {
  68                 case '\0':
  69                         arg = NULL;
  70                         break;
  71                 case ' ':
  72                         arg = prog + len + 1;
  73                         break;
  74                 default:
  75                         continue;
  76                 }
  77                 exit(cmd->exec(cmd->name, arg));
  78         }
  79         die("unrecognized command '%s'", prog);
  80 }