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 #include "xio-interface.h"
  14 #include "xio-posixmq.h"
  15
  16
  17 /* close the xio fd; must be valid and "simple" (not dual) */
  18 int xioclose1(struct single *pipe) {
  19
  20    if (pipe->tag == XIO_TAG_INVALID) {
  21       Notice("xioclose1(): invalid file descriptor");
  22       errno = EINVAL;
  23       return -1;
  24    }
  25
  26 #if WITH_READLINE
  27    if ((pipe->dtype & XIODATA_MASK) == XIODATA_READLINE) {
  28       Write_history(pipe->para.readline.history_file);
  29       /*xiotermios_setflag(pipe->fd, 3, ECHO|ICANON);*/ /* error when pty closed */
  30    }
  31 #endif /* WITH_READLINE */
  32 #if WITH_OPENSSL
  33    if ((pipe->dtype & XIODATA_MASK) == XIODATA_OPENSSL) {
  34       if (pipe->para.openssl.ssl) {
  35          /* e.g. on TCP connection refused, we do not yet have this set */
  36          sycSSL_shutdown(pipe->para.openssl.ssl);
  37          sycSSL_free(pipe->para.openssl.ssl);
  38          pipe->para.openssl.ssl = NULL;
  39       }
  40       Close(pipe->fd);  pipe->fd = -1;
  41       if (pipe->para.openssl.ctx) {
  42          sycSSL_CTX_free(pipe->para.openssl.ctx);
  43          pipe->para.openssl.ctx = NULL;
  44       }
  45    } else
  46 #endif /* WITH_OPENSSL */
  47 #if WITH_TERMIOS
  48    if (pipe->ttyvalid) {
  49       if (Tcsetattr(pipe->fd, TCSANOW, &pipe->savetty) < 0) {
  50          Warn2("cannot restore terminal settings on fd %d: %s",
  51                pipe->fd, strerror(errno));
  52       }
  53    }
  54 #endif /* WITH_TERMIOS */
  55 #if WITH_POSIXMQ
  56    if ((pipe->dtype & XIODATA_MASK) == XIODATA_POSIXMQ) {
  57       xioclose_posixmq(pipe);
  58    }
  59 #endif /* WITH_POSIXMQ */
  60    if (pipe->fd >= 0) {
  61       switch (pipe->howtoend) {
  62       case END_KILL: case END_SHUTDOWN_KILL: case END_CLOSE_KILL:
  63          if (pipe->para.exec.pid > 0) {
  64             pid_t pid;
  65
  66             /* first unregister child pid, so our sigchld handler will not throw an error */
  67             pid = pipe->para.exec.pid;
  68             pipe->para.exec.pid = 0;
  69             if (Kill(pid, SIGTERM) < 0) {
  70                Msg2(errno==ESRCH?E_INFO:E_WARN, "kill(%d, SIGTERM): %s",
  71                     pid, strerror(errno));
  72             }
  73          }
  74       default:
  75          break;
  76       }
  77       switch (pipe->howtoend) {
  78       case END_CLOSE: case END_CLOSE_KILL:
  79          if (Close(pipe->fd) < 0) {
  80          Info2("close(%d): %s", pipe->fd, strerror(errno)); } break;
  81 #if _WITH_SOCKET
  82       case END_SHUTDOWN: case END_SHUTDOWN_KILL:
  83          if (Shutdown(pipe->fd, 2) < 0) {
  84              Info3("shutdown(%d, %d): %s", pipe->fd, 2, strerror(errno)); }
  85          break;
  86 #endif /* _WITH_SOCKET */
  87 #if WITH_INTERFACE
  88       case END_INTERFACE:
  89          {
  90             if (pipe->para.interface.name[0] != '\0') {
  91                _xiointerface_set_iff(pipe->fd, pipe->para.interface.name,
  92                                      pipe->para.interface.save_iff);
  93             }
  94             if (Close(pipe->fd) < 0) {
  95                Info2("close(%d): %s", pipe->fd, strerror(errno)); } break;
  96          }
  97          break;
  98 #endif /* WITH_INTERFACE */
  99       case END_NONE: default: break;
 100       }
 101    }
 102
 103    /* unlock */
 104    if (pipe->havelock) {
 105       xiounlock(pipe->lock.lockfile);
 106       pipe->havelock = false;
 107    }
 108    if (pipe->opt_unlink_close && pipe->unlink_close) {
 109       if (Unlink(pipe->unlink_close) < 0) {
 110          Warn2("unlink(\"%s\"): %s", pipe->unlink_close, strerror(errno));
 111       }
 112       free(pipe->unlink_close);
 113    }
 114
 115    pipe->tag |= XIO_TAG_CLOSED;
 116    return 0;    /*! */
 117 }
 118
 119
 120 /* close the xio fd */
 121 int xioclose(xiofile_t *file) {
 122    int result;
 123
 124    if (file->tag == XIO_TAG_INVALID) {
 125       Error("xioclose(): invalid file descriptor");
 126       errno = EINVAL;
 127       return -1;
 128    }
 129
 130    if (file->tag == XIO_TAG_DUAL) {
 131       result  = xioclose1(file->dual.stream[0]);
 132       result |= xioclose1(file->dual.stream[1]);
 133       file->tag |= XIO_TAG_CLOSED;
 134    } else {
 135       result = xioclose1(&file->stream);
 136    }
 137    return result;
 138 }
 139