xioclose.c

   1 /* source: xioclose.c */
   2 /* Copyright Gerhard Rieger 2001-2009 */
   3 /* Published under the GNU General Public License V.2, see file COPYING */
   4
   5 /* this is the source of the extended close function */
   6
   7
   8 #include "xiosysincludes.h"
   9 #include "xioopen.h"
  10 #include "xiolockfile.h"
  11
  12 #include "xio-termios.h"
  13
  14
  15 /* close the xio fd; must be valid and "simple" (not dual) */
  16 int xioclose1(struct single *pipe) {
  17
  18    if (pipe->tag == XIO_TAG_INVALID) {
  19       Notice("xioclose1(): invalid file descriptor");
  20       errno = EINVAL;
  21       return -1;
  22    }
  23
  24 #if WITH_READLINE
  25    if ((pipe->dtype & XIODATA_MASK) == XIODATA_READLINE) {
  26       Write_history(pipe->para.readline.history_file);
  27       /*xiotermios_setflag(pipe->fd, 3, ECHO|ICANON);*/ /* error when pty closed */
  28    }
  29 #endif /* WITH_READLINE */
  30 #if WITH_OPENSSL
  31    if ((pipe->dtype & XIODATA_MASK) == XIODATA_OPENSSL) {
  32       if (pipe->para.openssl.ssl) {
  33          /* e.g. on TCP connection refused, we do not yet have this set */
  34          sycSSL_shutdown(pipe->para.openssl.ssl);
  35          sycSSL_free(pipe->para.openssl.ssl);
  36          pipe->para.openssl.ssl = NULL;
  37       }
  38       Close(pipe->fd);  pipe->fd = -1;
  39       if (pipe->para.openssl.ctx) {
  40          sycSSL_CTX_free(pipe->para.openssl.ctx);
  41          pipe->para.openssl.ctx = NULL;
  42       }
  43    } else
  44 #endif /* WITH_OPENSSL */
  45 #if WITH_TERMIOS
  46    if (pipe->ttyvalid) {
  47       if (Tcsetattr(pipe->fd, 0, &pipe->savetty) < 0) {
  48          Warn2("cannot restore terminal settings on fd %d: %s",
  49                pipe->fd, strerror(errno));
  50       }
  51    }
  52 #endif /* WITH_TERMIOS */
  53    if (pipe->fd >= 0) {
  54       switch (pipe->howtoend) {
  55       case END_KILL: case END_SHUTDOWN_KILL: case END_CLOSE_KILL:
  56          if (pipe->para.exec.pid > 0) {
  57             if (Kill(pipe->para.exec.pid, SIGTERM) < 0) {
  58                Msg2(errno==ESRCH?E_INFO:E_WARN, "kill(%d, SIGTERM): %s",
  59                     pipe->para.exec.pid, strerror(errno));
  60             }
  61          }
  62       default:
  63          break;
  64       }
  65       switch (pipe->howtoend) {
  66       case END_CLOSE: case END_CLOSE_KILL:
  67          if (Close(pipe->fd) < 0) {
  68          Info2("close(%d): %s", pipe->fd, strerror(errno)); } break;
  69 #if _WITH_SOCKET
  70       case END_SHUTDOWN: case END_SHUTDOWN_KILL:
  71          if (Shutdown(pipe->fd, 2) < 0) {
  72              Info3("shutdown(%d, %d): %s", pipe->fd, 2, strerror(errno)); }
  73          break;
  74 #endif /* _WITH_SOCKET */
  75       case END_NONE: default: break;
  76       }
  77    }
  78
  79    /* unlock */
  80    if (pipe->havelock) {
  81       xiounlock(pipe->lock.lockfile);
  82       pipe->havelock = false;
  83    }
  84    if (pipe->opt_unlink_close && pipe->unlink_close) {
  85       if (Unlink(pipe->unlink_close) < 0) {
  86          Info2("unlink(\"%s\"): %s", pipe->unlink_close, strerror(errno));
  87       }
  88       free(pipe->unlink_close);
  89    }
  90
  91    pipe->tag = XIO_TAG_INVALID;
  92    return 0;    /*! */
  93 }
  94
  95
  96 /* close the xio fd */
  97 int xioclose(xiofile_t *file) {
  98    int result;
  99
 100    if (file->tag == XIO_TAG_INVALID) {
 101       Error("xioclose(): invalid file descriptor");
 102       errno = EINVAL;
 103       return -1;
 104    }
 105
 106    if (file->tag == XIO_TAG_DUAL) {
 107       result  = xioclose1(file->dual.stream[0]);
 108       result |= xioclose1(file->dual.stream[1]);
 109       file->tag = XIO_TAG_INVALID;
 110    } else {
 111       result = xioclose1(&file->stream);
 112    }
 113    return result;
 114 }
 115