Add echo of piped stdin to stdout.

README.md

@@ -23,6 +23,12 @@ Prevent system sleep and keep display on:
 ```dos
 nosleep --display
 ```
+
+Echo stdin from a pipe to stdout and prevent sleep until the pipe is terminated:
+```dos
+ping -n 10000 127.0.0.1 | nosleep
+```
+
 *Note that user initiated power events will not be affected.*
 
 License
@@ -36,3 +42,4 @@ Permission is hereby granted, free of charge, to any person obtaining a copy of
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

nosleep/nosleep.c

@@ -36,14 +36,14 @@
 #define _CRT_NONSTDC_NO_WARNINGS
 #include <Windows.h>
 
-
 #include <conio.h>
+#include <io.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-static const char VERSION[] = "1.0";
+static const char VERSION[] = "1.1";
 static const char AUTHOR[] = "Brandon Herzog";
 
 static bool display_required;
@@ -54,7 +54,7 @@ static void help()
 		"    --display    keep display active\n"
 		"    --version    show version\n"
 		"    --help       show help\n"
-		"",	stdout);
+		"", stdout);
 	exit(EXIT_SUCCESS);
 }
 
@@ -100,9 +100,16 @@ int main(int argc, char **argv)
 		exit(EXIT_FAILURE);
 	}
 
-	fputs("Wide awake. Press any key to exit...\n", stdout);
-	fflush(stdout);
-	getch();
+	if (isatty(fileno(stdin))) {
+		fputs("Wide awake. Press any key to exit...\n", stdout);
+		fflush(stdout);
+		getch();
+	} else {
+		int ch;
+		while ((ch = fgetc(stdin)) != EOF) {
+			fputc(ch, stdout);
+		}
+	}
 
 	exit(EXIT_SUCCESS);
 }