Make improvements

- Fix build flakes
- Polyfill SIGWINCH on Windows
- Fix an execve issue on Windows
- Make strerror show more information
- Improve cmd.exe setup/teardown on Windows
- Support bracketed paste mode in Blinkenlights
- Show keyboard shortcuts in Blinkenlights status bar
- Fixed copy_file_range() and copyfile() w/ zip filesystem
- Size optimize GetDosArgv() to keep life.com 12kb in size
- Improve Blinkenlights ability to load weird ELF executables
- Fix program_executable_name and add GetInterpreterExecutableName
- Make Python in tiny mode fail better if docstrings are requested
- Update Python test exclusions in tiny* modes such as tinylinux
- Add bulletproof unbreakable kprintf() troubleshooting function
- Remove "oldskool" keyword from ape.S for virus scanners
- Fix issue that caused backtraces to not print sometimes
- Improve Blinkenlights serial uart character i/o
- Make clock_gettime() not clobber errno on xnu
- Improve sha256 cpuid check for old computers
- Integrate some bestline linenoise fixes
- Show runit process names better in htop
- Remove SIGPIPE from ShowCrashReports()
- Make realpath() not clobber errno
- Avoid attaching GDB on non-Linux
- Improve img.com example

examples/curl.c

@@ -65,11 +65,26 @@
 #define HeaderEqualCase(H, S) \
   SlicesEqualCase(S, strlen(S), HeaderData(H), HeaderLength(H))
 
+int sock;
+
 static bool TuneSocket(int fd, int a, int b, int x) {
   if (!b) return false;
   return setsockopt(fd, a, b, &x, sizeof(x)) != -1;
 }
 
+static void Write(const void *p, size_t n) {
+  ssize_t rc;
+  rc = write(1, p, n);
+  if (rc == -1 && errno == EPIPE) {
+    close(sock);
+    exit(128 + SIGPIPE);
+  }
+  if (rc != n) {
+    fprintf(stderr, "write failed: %m\n");
+    exit(1);
+  }
+}
+
 static int TlsSend(void *c, const unsigned char *p, size_t n) {
   int rc;
   NOISEF("begin send %zu", n);
@@ -107,7 +122,6 @@ static wontreturn void PrintUsage(FILE *f, int rc) {
 
 int main(int argc, char *argv[]) {
   if (!NoDebug()) showcrashreports();
-  xsigaction(SIGPIPE, SIG_IGN, 0, 0, 0);
 
   /*
    * Read flags.
@@ -258,7 +272,7 @@ int main(int argc, char *argv[]) {
   /*
    * Connect to server.
    */
-  int ret, sock;
+  int ret;
   CHECK_NE(-1, (sock = GoodSocket(addr->ai_family, addr->ai_socktype,
                                   addr->ai_protocol, false,
                                   &(struct timeval){-60})));
@@ -283,6 +297,8 @@ int main(int argc, char *argv[]) {
     CHECK_EQ(n, write(sock, request, n));
   }
 
+  xsigaction(SIGPIPE, SIG_IGN, 0, 0, 0);
+
   /*
    * Handle response.
    */
@@ -330,7 +346,7 @@ int main(int argc, char *argv[]) {
             break;
           }
           if (method == kHttpHead) {
-            CHECK_EQ(hdrlen, write(1, p, hdrlen));
+            Write(p, hdrlen);
             goto Finished;
           } else if (msg.status == 204 || msg.status == 304) {
             goto Finished;
@@ -348,32 +364,32 @@ int main(int argc, char *argv[]) {
             t = kHttpClientStateBodyLengthed;
             paylen = rc;
             if (paylen > i - hdrlen) {
-              CHECK_EQ(i - hdrlen, write(1, p + hdrlen, i - hdrlen));
+              Write(p + hdrlen, i - hdrlen);
             } else {
-              CHECK_EQ(paylen, write(1, p + hdrlen, paylen));
+              Write(p + hdrlen, paylen);
               goto Finished;
             }
           } else {
             t = kHttpClientStateBody;
-            CHECK_EQ(i - hdrlen, write(1, p + hdrlen, i - hdrlen));
+            Write(p + hdrlen, i - hdrlen);
           }
         }
         break;
       case kHttpClientStateBody:
         if (!g) goto Finished;
-        CHECK_EQ(g, write(1, p + i - g, g));
+        Write(p + i - g, g);
         break;
       case kHttpClientStateBodyLengthed:
         CHECK(g);
         if (i - hdrlen > paylen) g = hdrlen + paylen - (i - g);
-        CHECK_EQ(g, write(1, p + i - g, g));
+        Write(p + i - g, g);
         if (i - hdrlen >= paylen) goto Finished;
         break;
       case kHttpClientStateBodyChunked:
       Chunked:
         CHECK_NE(-1, (rc = Unchunk(&u, p + hdrlen, i - hdrlen, &paylen)));
         if (rc) {
-          CHECK_EQ(paylen, write(1, p + hdrlen, paylen));
+          Write(p + hdrlen, paylen);
           goto Finished;
         }
         break;