get home env var and evolution path for ics file

README.md

@@ -1,9 +1,11 @@
 Show upcoming events of an .ics file.
 
-Set the path to your .ics file in `src/main.c`:
+At the moment the standard path to the ics file used by the email client `evolution` is used.\
+You can set the path to your .ics file in `src/main.c`:
 ```
 const char ICS_PATH[] = "tests/calendar.ics";
 ```
+(uncomment some lines after that)
 
 
 ```
@@ -20,4 +22,14 @@ make
 sudo make install
 ```
 
-#### TODO: improve Makefile
+#### uninstall
+
+```
+sudo make uninstall
+```
+
+#### TODO
+
+- option -f to choose ics file
+- improve makefile
+- tests

makefile

@@ -14,3 +14,11 @@ run:
 .PHONY: install
 install: a.out
 	cp a.out /usr/local/bin/ics_analyzer
+
+.PHONY: clean
+clean:
+	rm a.out
+
+.PHONY: uninstall
+uninstall:
+	rm /usr/local/bin/ics_analyzer

src/main.c

@@ -7,12 +7,22 @@
 #include "seek_string_a.h"
 #include "remove_whitespace.h"
 #include <stdio.h>
+#include <stdlib.h>
 #include <fcntl.h>
 #include <string.h>
 #include <limits.h>
 
 int main() {
-	const char ICS_PATH[] = "tests/calendar.ics";
+	//const char ICS_PATH[] = "tests/calendar.ics";
+	char *ICS_PATH;
+	char *HOME = getenv("HOME");
+
+	if (HOME != NULL) {
+		ICS_PATH = strcat(HOME, "/.local/share/evolution/calendar/system/calendar.ics");
+	} else {
+		printf ("Environment variable HOME is not set.\n");
+		return 1;
+	}
 
 	char my_line[4096] = "";