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                if (path)
  35                        *(path++) = '\0';
  36        }
  37        if (!path) {
  38                return error("Bad URL: %s", url);
  39        }
  40        /* ssh <host> 'cd <path>; stdio-pull <arg...> <commit-id>' */
  41        snprintf(command, COMMAND_SIZE, 
  42                 "%s='%s' %s",
  43                 GIT_DIR_ENVIRONMENT, path, remote_prog);
  44        *path = '\0';
  45        posn = command + strlen(command);
  46        for (i = 0; i < rmt_argc; i++) {
  47                *(posn++) = ' ';
  48                strncpy(posn, rmt_argv[i], COMMAND_SIZE - (posn - command));
  49                posn += strlen(rmt_argv[i]);
  50                if (posn - command + 4 >= COMMAND_SIZE) {
  51                        return error("Command line too long");
  52                }
  53        }
  54        strcpy(posn, " -");
  55        if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) {
  56                return error("Couldn't create socket");
  57        }
  58        if (!fork()) {
  59                const char *ssh = getenv("GIT_SSH") ? : "ssh";
  60                const char *ssh_basename = strrchr(ssh, '/');
  61                if (!ssh_basename)
  62                        ssh_basename = ssh;
  63                else
  64                        ssh_basename++;
  65                close(sv[1]);
  66                dup2(sv[0], 0);
  67                dup2(sv[0], 1);
  68                execlp(ssh, ssh_basename, host, command, NULL);
  69        }
  70        close(sv[0]);
  71        *fd_in = sv[1];
  72        *fd_out = sv[1];
  73        return 0;
  74}