xioclose.c

   1 /* source: xioclose.c */
   2 /* Copyright Gerhard Rieger and contributors (see file CHANGES) */
   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             pid_t pid;
  58
  59             /* first unregister child pid, so our sigchld handler will not throw an error */
  60             pid = pipe->para.exec.pid;
  61             pipe->para.exec.pid = 0;
  62             if (Kill(pid, SIGTERM) < 0) {
  63                Msg2(errno==ESRCH?E_INFO:E_WARN, "kill(%d, SIGTERM): %s",
  64                     pid, strerror(errno));
  65             }
  66          }
  67       default:
  68          break;
  69       }
  70       switch (pipe->howtoend) {
  71       case END_CLOSE: case END_CLOSE_KILL:
  72          if (Close(pipe->fd) < 0) {
  73          Info2("close(%d): %s", pipe->fd, strerror(errno)); } break;
  74 #if _WITH_SOCKET
  75       case END_SHUTDOWN: case END_SHUTDOWN_KILL:
  76          if (Shutdown(pipe->fd, 2) < 0) {
  77              Info3("shutdown(%d, %d): %s", pipe->fd, 2, strerror(errno)); }
  78          break;
  79 #endif /* _WITH_SOCKET */
  80       case END_NONE: default: break;
  81       }
  82    }
  83
  84    /* unlock */
  85    if (pipe->havelock) {
  86       xiounlock(pipe->lock.lockfile);
  87       pipe->havelock = false;
  88    }
  89    if (pipe->opt_unlink_close && pipe->unlink_close) {
  90       if (Unlink(pipe->unlink_close) < 0) {
  91          Info2("unlink(\"%s\"): %s", pipe->unlink_close, strerror(errno));
  92       }
  93       free(pipe->unlink_close);
  94    }
  95
  96    pipe->tag = XIO_TAG_INVALID;
  97    return 0;    /*! */
  98 }
  99
 100
 101 /* close the xio fd */
 102 int xioclose(xiofile_t *file) {
 103    int result;
 104
 105    if (file->tag == XIO_TAG_INVALID) {
 106       Error("xioclose(): invalid file descriptor");
 107       errno = EINVAL;
 108       return -1;
 109    }
 110
 111    if (file->tag == XIO_TAG_DUAL) {
 112       result  = xioclose1(file->dual.stream[0]);
 113       result |= xioclose1(file->dual.stream[1]);
 114       file->tag = XIO_TAG_INVALID;
 115    } else {
 116       result = xioclose1(&file->stream);
 117    }
 118    return result;
 119 }
 120