Andrew's git - gitweb.git/blob

   1#include "rsh.h"
   2
   3#include <string.h>
   4#include <sys/types.h>
   5#include <sys/socket.h>
   6
   7#include "cache.h"
   8
   9#define COMMAND_SIZE 4096
  10
  11int setup_connection(int *fd_in, int *fd_out, const char *remote_prog, 
  12                     char *url, int rmt_argc, char **rmt_argv)
  13{
  14        char *host;
  15        char *path;
  16        int sv[2];
  17        char command[COMMAND_SIZE];
  18        char *posn;
  19        int i;
  20
  21        if (!strcmp(url, "-")) {
  22                *fd_in = 0;
  23                *fd_out = 1;
  24                return 0;
  25        }
  26
  27        host = strstr(url, "//");
  28        if (host) {
  29                host += 2;
  30                path = strchr(host, '/');
  31        } else {
  32                host = url;
  33                path = strchr(host, ':');
  34        }
  35        if (!path) {
  36                return error("Bad URL: %s", url);
  37        }
  38        *(path++) = '\0';
  39        /* ssh <host> 'cd /<path>; stdio-pull <arg...> <commit-id>' */
  40        snprintf(command, COMMAND_SIZE, 
  41                 "%s='/%s' %s",
  42                 GIT_DIR_ENVIRONMENT, path, remote_prog);
  43        posn = command + strlen(command);
  44        for (i = 0; i < rmt_argc; i++) {
  45                *(posn++) = ' ';
  46                strncpy(posn, rmt_argv[i], COMMAND_SIZE - (posn - command));
  47                posn += strlen(rmt_argv[i]);
  48                if (posn - command + 4 >= COMMAND_SIZE) {
  49                        return error("Command line too long");
  50                }
  51        }
  52        strcpy(posn, " -");
  53        if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) {
  54                return error("Couldn't create socket");
  55        }
  56        if (!fork()) {
  57                close(sv[1]);
  58                dup2(sv[0], 0);
  59                dup2(sv[0], 1);
  60                execlp("ssh", "ssh", host, command, NULL);
  61        }
  62        close(sv[0]);
  63        *fd_in = sv[1];
  64        *fd_out = sv[1];
  65        return 0;
  66}