compat/nonblock.c

   1 #include "git-compat-util.h"
   2 #include "nonblock.h"
   3
   4 #ifdef O_NONBLOCK
   5
   6 int enable_pipe_nonblock(int fd)
   7 {
   8         int flags = fcntl(fd, F_GETFL);
   9         if (flags < 0)
  10                 return -1;
  11         flags |= O_NONBLOCK;
  12         return fcntl(fd, F_SETFL, flags);
  13 }
  14
  15 #elif defined(GIT_WINDOWS_NATIVE)
  16
  17 #include "win32.h"
  18
  19 int enable_pipe_nonblock(int fd)
  20 {
  21         HANDLE h = (HANDLE)_get_osfhandle(fd);
  22         DWORD mode;
  23         DWORD type = GetFileType(h);
  24         if (type == FILE_TYPE_UNKNOWN && GetLastError() != NO_ERROR) {
  25                 errno = EBADF;
  26                 return -1;
  27         }
  28         if (type != FILE_TYPE_PIPE)
  29                 BUG("unsupported file type: %lu", type);
  30         if (!GetNamedPipeHandleState(h, &mode, NULL, NULL, NULL, NULL, 0)) {
  31                 errno = err_win_to_posix(GetLastError());
  32                 return -1;
  33         }
  34         mode |= PIPE_NOWAIT;
  35         if (!SetNamedPipeHandleState(h, &mode, NULL, NULL)) {
  36                 errno = err_win_to_posix(GetLastError());
  37                 return -1;
  38         }
  39         return 0;
  40 }
  41
  42 #else
  43
  44 int enable_pipe_nonblock(int fd UNUSED)
  45 {
  46         errno = ENOSYS;
  47         return -1;
  48 }
  49
  50 #endif