Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "quote.h"
   3#include "exec_cmd.h"
   4#include "strbuf.h"
   5
   6static int do_generic_cmd(const char *me, char *arg)
   7{
   8        const char *my_argv[4];
   9
  10        setup_path();
  11        if (!arg || !(arg = sq_dequote(arg)))
  12                die("bad argument");
  13        if (prefixcmp(me, "git-"))
  14                die("bad command");
  15
  16        my_argv[0] = me + 4;
  17        my_argv[1] = arg;
  18        my_argv[2] = NULL;
  19
  20        return execv_git_cmd(my_argv);
  21}
  22
  23static int do_cvs_cmd(const char *me, char *arg)
  24{
  25        const char *cvsserver_argv[3] = {
  26                "cvsserver", "server", NULL
  27        };
  28
  29        if (!arg || strcmp(arg, "server"))
  30                die("git-cvsserver only handles server: %s", arg);
  31
  32        setup_path();
  33        return execv_git_cmd(cvsserver_argv);
  34}
  35
  36
  37static 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
  47int main(int argc, char **argv)
  48{
  49        char *prog;
  50        struct commands *cmd;
  51        int devnull_fd;
  52
  53        /*
  54         * Always open file descriptors 0/1/2 to avoid clobbering files
  55         * in die().  It also avoids not messing up when the pipes are
  56         * dup'ed onto stdin/stdout/stderr in the child processes we spawn.
  57         */
  58        devnull_fd = open("/dev/null", O_RDWR);
  59        while (devnull_fd >= 0 && devnull_fd <= 2)
  60                devnull_fd = dup(devnull_fd);
  61        if (devnull_fd == -1)
  62                die("opening /dev/null failed (%s)", strerror(errno));
  63        close (devnull_fd);
  64
  65        /*
  66         * Special hack to pretend to be a CVS server
  67         */
  68        if (argc == 2 && !strcmp(argv[1], "cvs server"))
  69                argv--;
  70
  71        /*
  72         * We do not accept anything but "-c" followed by "cmd arg",
  73         * where "cmd" is a very limited subset of git commands.
  74         */
  75        else if (argc != 3 || strcmp(argv[1], "-c"))
  76                die("What do you think I am? A shell?");
  77
  78        prog = argv[2];
  79        if (!strncmp(prog, "git", 3) && isspace(prog[3]))
  80                /* Accept "git foo" as if the caller said "git-foo". */
  81                prog[3] = '-';
  82
  83        for (cmd = cmd_list ; cmd->name ; cmd++) {
  84                int len = strlen(cmd->name);
  85                char *arg;
  86                if (strncmp(cmd->name, prog, len))
  87                        continue;
  88                arg = NULL;
  89                switch (prog[len]) {
  90                case '\0':
  91                        arg = NULL;
  92                        break;
  93                case ' ':
  94                        arg = prog + len + 1;
  95                        break;
  96                default:
  97                        continue;
  98                }
  99                exit(cmd->exec(cmd->name, arg));
 100        }
 101        die("unrecognized command '%s'", prog);
 102}