Introduce swap support

This adds a new config section titled "swap". It configures the same way
as the memory config entity.

5 files changed, 100 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 341e1a0..38885f4 100644
--- a/Makefile
+++ b/Makefile
@@ -33,13 +33,16 @@ config_fs: common config_node
 config_mem: common config_node
 	cc $(CCOPTS) src/config_mem.c -c -o obj/config_mem.o
 
+config_swap: common config_node
+	cc $(CCOPTS) src/config_swap.c -c -o obj/config_swap.o
+
 config_net: common config_node
 	cc $(CCOPTS) src/config_net.c -c -o obj/config_net.o
 
 config_shell: common config_node
 	cc $(CCOPTS) src/config_shell.c -c -o obj/config_shell.o
 
-config: config_node config_bat config_fs config_net config_date config_time config_mem config_cpu config_shell
+config: config_node config_bat config_fs config_net config_date config_time config_mem config_swap config_cpu config_shell
 	cc $(CCOPTS) src/config.c -c -o obj/config.o
 
 install:
diff --git a/src/config.c b/src/config.c
index 07bbc2f..aa4af37 100644
--- a/src/config.c
+++ b/src/config.c
@@ -89,6 +89,9 @@ struct node* config_load(char* path) {
       } else if(strcmp(section, "mem") == 0) {
         cur = node_new(&config_mem_init);
 
+      } else if(strcmp(section, "swap") == 0) {
+        cur = node_new(&config_swap_init);
+
       } else if(strcmp(section, "cpu") == 0) {
         cur = node_new(&config_cpu_init);
 
diff --git a/src/config.h b/src/config.h
index de0e294..aa8b630 100644
--- a/src/config.h
+++ b/src/config.h
@@ -21,6 +21,7 @@
 #include "common.h"
 #include "config_node.h"
 #include "config_mem.h"
+#include "config_swap.h"
 #include "config_cpu.h"
 #include "config_net.h"
 #include "config_date.h"
diff --git a/src/config_swap.c b/src/config_swap.c
new file mode 100644
index 0000000..5a8ff90
--- /dev/null
+++ b/src/config_swap.c
@@ -0,0 +1,62 @@
+/**
+ * I3cstatus prints a configurable status bar for the i3 window manager
+ * Copyright (C) 2020 Aaron Ball <nullspoon@oper.io>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "config_swap.h"
+
+void config_swap_init(struct node* n) {
+  n->data = NULL;
+  n->type = CTYPE_SWAP;
+  n->loadfunc = &config_swap_load;
+  n->loadkey = &load_swap_key;
+}
+
+void load_swap_key(struct node* n, char* key, char* val) {
+}
+
+int config_swap_load(struct node* n) {
+  long total;
+  long free;
+  int percent;
+
+  FILE* fd = fopen("/proc/meminfo", "r");
+  fscanf(fd, "SwapTotal: %ld kB ", &total);
+  fscanf(fd, "SwapFree: %ld kB ", &free);
+  fclose(fd);
+
+  percent = (total - free) * 100 / total;
+
+  if(percent < 20) {
+    strcpy(n->color, C_GREEN);
+  } else if(percent < 40) {
+    strcpy(n->color, C_YELLOW);
+  } else if(percent < 60) {
+    strcpy(n->color, C_ORANGE);
+  } else {
+    strcpy(n->color, C_RED);
+  }
+  strcpy(n->label_color, C_LGREY);
+
+  if(strcmp(n->display, "bar") == 0) {
+    print_bar(12, (double)(total - free) / total, n->text);
+  } else {
+    sprintf(n->text, "%02d%%", percent);
+  }
+
+  return 0;
+}
+
+
diff --git a/src/config_swap.h b/src/config_swap.h
new file mode 100644
index 0000000..d9fa024
--- /dev/null
+++ b/src/config_swap.h
@@ -0,0 +1,30 @@
+/**
+ * I3cstatus prints a configurable status bar for the i3 window manager
+ * Copyright (C) 2020 Aaron Ball <nullspoon@oper.io>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef CONFIG_SWAP
+#define CONFIG_SWAP
+
+#include "common.h"
+#include "config_node.h"
+
+#define CTYPE_SWAP   65
+
+void config_swap_init(struct node*);
+int config_swap_load(struct node*);
+void load_swap_key(struct node*, char*, char*);
+
+#endif