diff options
Diffstat (limited to 'dbus/dbus-sysdeps-unix.c')
-rw-r--r-- | dbus/dbus-sysdeps-unix.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/dbus/dbus-sysdeps-unix.c b/dbus/dbus-sysdeps-unix.c index 57708123..9fddca73 100644 --- a/dbus/dbus-sysdeps-unix.c +++ b/dbus/dbus-sysdeps-unix.c @@ -866,6 +866,96 @@ _dbus_connect_unix_socket (const char *path, } /** + * Creates a UNIX domain socket and connects it to the specified + * process to execute. + * + * This will set FD_CLOEXEC for the socket returned. + * + * @param path the path to the executable + * @param argv the argument list for the process to execute. + * argv[0] typically is identical to the path of the executable + * @param error return location for error code + * @returns connection file descriptor or -1 on error + */ +int +_dbus_connect_exec (const char *path, + char *const argv[], + DBusError *error) +{ + int fds[2]; + pid_t pid; + + _DBUS_ASSERT_ERROR_IS_CLEAR (error); + + _dbus_verbose ("connecting to process %s\n", path); + + if (socketpair (AF_UNIX, SOCK_STREAM +#ifdef SOCK_CLOEXEC + |SOCK_CLOEXEC +#endif + , 0, fds) < 0) + { + dbus_set_error (error, + _dbus_error_from_errno (errno), + "Failed to create socket pair: %s", + _dbus_strerror (errno)); + return -1; + } + + _dbus_fd_set_close_on_exec (fds[0]); + _dbus_fd_set_close_on_exec (fds[1]); + + pid = fork (); + if (pid < 0) + { + dbus_set_error (error, + _dbus_error_from_errno (errno), + "Failed to fork() to call %s: %s", + path, _dbus_strerror (errno)); + close (fds[0]); + close (fds[1]); + return -1; + } + + if (pid == 0) + { + /* child */ + close (fds[0]); + + dup2 (fds[1], STDIN_FILENO); + dup2 (fds[1], STDOUT_FILENO); + + if (fds[1] != STDIN_FILENO && + fds[1] != STDOUT_FILENO) + close (fds[1]); + + /* Inherit STDERR and the controlling terminal from the + parent */ + + _dbus_close_all (); + + execvp (path, argv); + + fprintf (stderr, "Failed to execute process %s: %s\n", path, _dbus_strerror (errno)); + + _exit(1); + } + + /* parent */ + close (fds[1]); + + if (!_dbus_set_fd_nonblocking (fds[0], error)) + { + _DBUS_ASSERT_ERROR_IS_SET (error); + + close (fds[0]); + return -1; + } + + return fds[0]; +} + +/** * Enables or disables the reception of credentials on the given socket during * the next message transmission. This is only effective if the #LOCAL_CREDS * system feature exists, in which case the other side of the connection does |