Provide and manage system configuration file

Makefile

@@ -4,6 +4,7 @@ LDFLAGS += $(shell pkg-config --libs $(LIBS))
 
 PROGRAM = xob
 MANPAGE = doc/xob.1
+SYSCONF = styles.cfg
 SOURCES = $(wildcard src/*.c)
 OBJECTS = $(SOURCES:.c=.o)
 
@@ -12,6 +13,7 @@ INSTALL_PROGRAM ?= $(INSTALL)
 INSTALL_DATA    ?= $(INSTALL) -m 644
 prefix          ?= /usr/local
 bindir          ?= $(prefix)/bin
+sysconfdir      ?= $(prefix)/etc
 datarootdir     ?= $(prefix)/share
 mandir          ?= $(datarootdir)/man
 man1dir         ?= $(mandir)/man1
@@ -22,17 +24,21 @@ $(PROGRAM): $(OBJECTS)
 	$(CC) -o $@ $(OBJECTS) $(LDFLAGS)
 
 %.o: %.c %.h
-	$(CC) $(CFLAGS) -c -o $@ $<
+	$(CC) $(CFLAGS) -DSYSCONFDIR='"$(sysconfdir)"' -c -o $@ $<
 
-install: $(PROGRAM) $(MANPAGE)
+install: $(PROGRAM) $(MANPAGE) $(SYSCONF)
 	mkdir --parents "$(DESTDIR)$(bindir)"
 	$(INSTALL_PROGRAM) "$(PROGRAM)" -t "$(DESTDIR)$(bindir)"
 	mkdir --parents "$(DESTDIR)$(man1dir)"
 	$(INSTALL_DATA) "$(MANPAGE)" -t "$(DESTDIR)$(man1dir)"
+	mkdir --parents "$(DESTDIR)$(sysconfdir)/$(PROGRAM)"
+	$(INSTALL_DATA) "$(SYSCONF)" -t "$(DESTDIR)$(sysconfdir)/$(PROGRAM)"
 
 uninstall:
 	rm -f "$(DESTDIR)$(bindir)/$(PROGRAM)"
 	rm -f "$(DESTDIR)$(man1dir)/$(MANPAGE)"
+	rm -f "$(DESTDIR)$(sysconfdir)/$(PROGRAM)/$(SYSCONF)"
+	rmdir "$(DESTDIR)$(sysconfdir)/$(PROGRAM)"
 
 clean:
 	rm -f $(OBJECTS)
@@ -43,4 +49,3 @@ src/display.o: src/display.h src/conf.h
 src/main.o: src/main.h src/display.h src/conf.h
 
 .PHONY: all install uninstall clean
-

README.md

@@ -90,7 +90,7 @@ When starting, xob looks for the configuration file in the following order:
 1. The path specified as the **-c** argument.
 2. `$XDG_CONFIG_HOME$/xob/styles.cfg` (if `$XDG_CONFIG_HOME$` is set)
 3. `~/.config/xob/styles.cfg`
-4. `/etc/xob/styles.cfg`
+4. Under the system configuration directory (determined during build process): e.g. /etc/xob/styles.cfg or /usr/local/etc/xob/styles.cfg
 
 Consult the man page for detailed information about the configuration file and the available options. The following `styles.cfg` defines a single style called "default" that showcases all the possible options set to the default values. The configration file may contain additional styles to choose among using the **-s** argument.
 

doc/xob.1

@@ -67,7 +67,9 @@ $XDG_CONFIG_HOME$/xob/styles.cfg (if $XDG_CONFIG_HOME$ is set)
 .IP "3." 3
 ~/.config/xob/styles.cfg
 .IP "4." 3
-/etc/xob/styles.cfg
+Under the system configuration directory (determined during build
+process): e.g.
+/etc/xob/styles.cfg or /usr/local/etc/xob/styles.cfg
 .SS SYNTAX
 .PP
 The configuration file adheres to the libconfig syntax.

doc/xob.md

@@ -35,7 +35,7 @@ The configuration file only specifies styles (appearances) for the bar. The maxi
 1. The path specified as the **-c** argument.
 2. \$XDG\_CONFIG\_HOME\$/xob/styles.cfg (if \$XDG\_CONFIG\_HOME\$ is set)
 3. ~/.config/xob/styles.cfg
-4. /etc/xob/styles.cfg
+4. Under the system configuration directory (determined during build process): e.g. /etc/xob/styles.cfg or /usr/local/etc/xob/styles.cfg
 
 ## SYNTAX
 

src/main.c

@@ -142,14 +142,11 @@ int main(int argc, char *argv[])
     /* Case #4: system wide configuration */
     if (config_file == NULL)
     {
-        if (snprintf(xdg_config_file_path, PATH_MAX, "/etc/%s/%s",
-                     DEFAULT_CONFIG_APPNAME,
-                     DEFAULT_CONFIG_FILENAME) < PATH_MAX)
+        if (realpath(SYSCONFDIR "/" DEFAULT_CONFIG_APPNAME
+                                "/" DEFAULT_CONFIG_FILENAME,
+                     real_config_file_path) != NULL)
         {
-            if (realpath(xdg_config_file_path, real_config_file_path) != NULL)
-            {
-                config_file = fopen(real_config_file_path, "r");
-            }
+            config_file = fopen(real_config_file_path, "r");
         }
     }
 

styles.cfg

@@ -0,0 +1,34 @@
+default = {
+    x         = {relative = 0.0; offset = 0;};
+    y         = {relative = 0.9; offset = 0;};
+    length    = {relative = 0.2; offset = 0;};
+    thickness = 24;
+    outline   = 3;
+    border    = 4;
+    padding   = 3;
+
+    overflow = "proportional";
+
+    color = {
+        normal = {
+            fg     = "#ffffff";
+            bg     = "#000000";
+            border = "#ffffff";
+        };
+        alt = {
+            fg     = "#555555";
+            bg     = "#000000";
+            border = "#555555";
+        };
+        overflow = {
+            fg     = "#ff0000";
+            bg     = "#000000";
+            border = "#ff0000";
+        };
+        altoverflow = {
+            fg     = "#550000";
+            bg     = "#000000";
+            border = "#550000";
+        };
+    };
+};