@@ -44,3 +44,6 @@ callgrind.out*
 
 # perf
 perf.data*
+
+# gnuplot inputs generated from executables.
+*.dat
@@ -2,7 +2,7 @@
 
 [![Build Status](https://travis-ci.org/cirosantilli/cpp-cheat.svg?branch=master)](https://travis-ci.org/cirosantilli/cpp-cheat)
 
-C and C++ minimal examples. Asserts used wherever possible. Hello worlds for cool third party libraries and build systems. Cheatsheets, tutorials and mini-projects.
+C, C++, POSIX / Linux system programming minimal examples. Asserts used wherever possible. Hello worlds for cool third party libraries and build systems. Cheatsheets, tutorials and mini-projects.
 
 [Assembly Cheat](https://github.com/cirosantilli/assembly-cheat) contains lower level issues, like assembly, ELF and Binutils.
 
 
@@ -51,5 +51,5 @@
 #include "common.h"
 
 int main(void) {
-	return EXIT_SUCCESS;
+    return EXIT_SUCCESS;
 }
@@ -139,38 +139,38 @@ void signal_handler(int sig) {
      * In POSIX, we can use write(STDOUT_FILENO, but still there is
      * no way to format the string apparently.
      *
-	 * - https://stackoverflow.com/questions/16891019/how-to-avoid-using-printf-in-a-signal-handler
-	 * - https://stackoverflow.com/questions/14573000/print-int-from-signal-handler-using-write-or-async-safe-functions
+     * - https://stackoverflow.com/questions/16891019/how-to-avoid-using-printf-in-a-signal-handler
+     * - https://stackoverflow.com/questions/14573000/print-int-from-signal-handler-using-write-or-async-safe-functions
      * */
-	/*printf("sig: %d\n", sig);*/
+    /*printf("sig: %d\n", sig);*/
 
-	global = 1;
+    global = 1;
     /* After the signal is dealt with, the handler is then changed to its default action
      * if you want to continue using this handler for future signals, you have to reregister. */
-	signal(sig, signal_handler);
+    signal(sig, signal_handler);
 }
 
 int main(void) {
 
     /* TODO: why don't we handle SIGABRT? */
     signal(SIGABRT, signal_handler);
-	/*abort();*/
+    /*abort();*/
     /*assert(i == 1);*/
 
 #if 0
     /* # Floating point exception
      *
      * TODO why hangs? */
-	{
-		signal(SIGFPE, signal_handler);
-		int i = 0;
-		int j = 0;
-		/* cannot do 1 / 0 or the compiler will give a warning. Lets dupe him: */
-		j = 1 / i;
-		/* you need this `printf` or the compiler may optimize your division away */
-		printf("%d", j);
-		assert(global == 1);
-	}
+    {
+        signal(SIGFPE, signal_handler);
+        int i = 0;
+        int j = 0;
+        /* cannot do 1 / 0 or the compiler will give a warning. Lets dupe him: */
+        j = 1 / i;
+        /* you need this `printf` or the compiler may optimize your division away */
+        printf("%d", j);
+        assert(global == 1);
+    }
 #endif
 
     /*
 
@@ -2,6 +2,6 @@
 #include <stdlib.h>
 
 int main(void) {
-	puts(__FILE__);
+    puts(__FILE__);
     return EXIT_SUCCESS;
 }
@@ -2,6 +2,6 @@
 #include <stdlib.h>
 
 int main(void) {
-	puts(__FILE__);
+    puts(__FILE__);
     return EXIT_SUCCESS;
 }
@@ -4,6 +4,6 @@
 #include "a.h"
 
 int main(void) {
-	printf("%d\n", a());
+    printf("%d\n", a());
     return EXIT_SUCCESS;
 }
@@ -4,6 +4,6 @@
 #include "d/a.h"
 
 int main(void) {
-	printf("%d\n", a());
+    printf("%d\n", a());
     return EXIT_SUCCESS;
 }
@@ -158,7 +158,7 @@ class NoBaseNoMember {
         }
 
         static void temporaryReferenceConst(const NoBaseNoMember& temp) {
-        	si = temp.i;
+            si = temp.i;
         }
 };
Original file line number	Diff line number	Diff line change
`@@ -51,5 +51,5 @@`
`51`	`51`	`#include "common.h"`
`52`	`52`
`53`	`53`	`int main(void) {`
`54`		`- return EXIT_SUCCESS;`
	`54`	`+ return EXIT_SUCCESS;`
`55`	`55`	`}`
Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,6 @@`
`2`	`2`	`#include <stdlib.h>`
`3`	`3`
`4`	`4`	`int main(void) {`
`5`		`- puts(__FILE__);`
	`5`	`+ puts(__FILE__);`
`6`	`6`	`return EXIT_SUCCESS;`
`7`	`7`	`}`
Original file line number	Diff line number	Diff line change
`@@ -4,6 +4,6 @@`
`4`	`4`	`#include "a.h"`
`5`	`5`
`6`	`6`	`int main(void) {`
`7`		`- printf("%d\n", a());`
	`7`	`+ printf("%d\n", a());`
`8`	`8`	`return EXIT_SUCCESS;`
`9`	`9`	`}`
Original file line number	Diff line number	Diff line change
`@@ -4,6 +4,6 @@`
`4`	`4`	`#include "d/a.h"`
`5`	`5`
`6`	`6`	`int main(void) {`
`7`		`- printf("%d\n", a());`
	`7`	`+ printf("%d\n", a());`
`8`	`8`	`return EXIT_SUCCESS;`
`9`	`9`	`}`
Original file line number	Diff line number	Diff line change
`@@ -158,7 +158,7 @@ class NoBaseNoMember {`
`158`	`158`	`}`
`159`	`159`
`160`	`160`	`static void temporaryReferenceConst(const NoBaseNoMember& temp) {`
`161`		`- si = temp.i;`
	`161`	`+ si = temp.i;`
`162`	`162`	`}`
`163`	`163`	`};`
`164`	`164`