1 // Copyright (c) 2015 Ryan Prichard
3 // Permission is hereby granted, free of charge, to any person obtaining a copy
4 // of this software and associated documentation files (the "Software"), to
5 // deal in the Software without restriction, including without limitation the
6 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 // sell copies of the Software, and to permit persons to whom the Software is
8 // furnished to do so, subject to the following conditions:
10 // The above copyright notice and this permission notice shall be included in
11 // all copies or substantial portions of the Software.
13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
29 #include "../shared/DebugClient.h"
31 // Write the entire buffer, restarting it as necessary.
32 bool writeAll(int fd, const void *buffer, size_t size) {
34 while (written < size) {
36 reinterpret_cast<const char*>(buffer) + written,
38 if (ret == -1 && errno == EINTR) {
42 trace("write failed: "
43 "fd=%d errno=%d size=%u written=%d ret=%d",
46 static_cast<unsigned int>(size),
47 static_cast<unsigned int>(written),
51 assert(static_cast<size_t>(ret) <= size - written);
54 assert(written == size);
58 bool writeStr(int fd, const char *str) {
59 return writeAll(fd, str, strlen(str));
62 void selectWrapper(const char *diagName, int nfds, fd_set *readfds) {
63 int ret = select(nfds, readfds, NULL, NULL, NULL);
69 #ifdef WINPTY_TARGET_MSYS1
70 // The select system call sometimes fails with EAGAIN instead of EINTR.
71 // This apparantly only happens with the old Cygwin fork "MSYS" used in
72 // the mingw.org project. select is not supposed to fail with EAGAIN,
73 // and EAGAIN does not make much sense as an error code. (The whole
74 // point of select is to block.)
75 if (errno == EAGAIN) {
76 trace("%s select returned EAGAIN: interpreting like EINTR",
82 fprintf(stderr, "Internal error: %s select failed: "
83 "error %d", diagName, errno);