Initial commit

This includes support for printing battery, cpu, filesystem, memory,
time, and date sections. Sections with percentage values also support
the `display = bar` configuration to make them display a bar rather than
the actual percent. Finally, for relevant data types, colors change from
green to red as percentage approaches appropriate levels (eg: when
memory is high, color is red; when battery is low, color is red,
otherwise green).

31 files changed, 2211 insertions, 0 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/LICENSE
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+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ee939c1
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,55 @@
+CCOPTS = --std=gnu99 -Wall -O2
+
+all: setup common config
+	cc $(CCOPTS) src/main.c obj/*.o -o i3cstat
+
+setup:
+	if [ ! -d obj ]; then mkdir obj; fi
+
+clean:
+	if [ ! -d obj ]; then rm -r obj; fi
+
+common:
+	cc $(CCOPTS) src/common.c -c -o obj/common.o
+
+config_node:
+	cc $(CCOPTS) src/config_node.c -c -o obj/config_node.o
+
+config_time: common config_node
+	cc $(CCOPTS) src/config_time.c -c -o obj/config_time.o
+
+config_date: common config_node
+	cc $(CCOPTS) src/config_date.c -c -o obj/config_date.o
+
+config_cpu: common config_node
+	cc $(CCOPTS) src/config_cpu.c -c -o obj/config_cpu.o
+
+config_bat: common config_node
+	cc $(CCOPTS) src/config_bat.c -c -o obj/config_bat.o
+
+config_fs: common config_node
+	cc $(CCOPTS) src/config_fs.c -c -o obj/config_fs.o
+
+config_mem: common config_node
+	cc $(CCOPTS) src/config_mem.c -c -o obj/config_mem.o
+
+config_net: common config_node
+	cc $(CCOPTS) src/config_net.c -c -o obj/config_net.o
+
+config: config_node config_bat config_fs config_net config_date config_time config_mem config_cpu
+	cc $(CCOPTS) src/config.c -c -o obj/config.o
+
+install:
+	install -D -m 0755 i3cstat $(DESTDIR)/usr/bin/i3cstat
+
+_tests:
+	mkdir -p tests/obj
+	$(info Compiling tests)
+	cc $(CCOPTS) tests/assert.c -c -o tests/obj/assert.o
+	cc $(CCOPTS) tests/test_common.c -c -o tests/obj/test_common.o
+	cc $(CCOPTS) tests/test_config.c -c -o tests/obj/test_config.o
+
+test: common config _tests
+	cc $(CCOPTS) tests/main.c obj/*.o tests/obj/*.o -o tests/runtests
+	$(info Running tests)
+	@tests/runtests
diff --git a/i3cstat.conf.sample b/i3cstat.conf.sample
new file mode 100644
index 0000000..eedc450
--- /dev/null
+++ b/i3cstat.conf.sample
@@ -0,0 +1,41 @@
+# This is a sample configuration file
+# Copy this to ~/.config/i3cstat.conf and make changes as you like.
+#
+
+[bat]
+label = bat:
+name = BAT0
+display = bar
+
+[mem]
+label = mem:
+display = bar
+
+[cpu]
+label = cpu:
+display = bar
+
+[fs]
+path = /
+
+[fs]
+path = /tmp
+
+[net]
+ifname = wlo1
+label = wlo
+
+[net]
+ifname = eno1
+label = eno
+
+[net]
+ifname = tun0
+label = vpn
+
+[time]
+tz    = Greenwich
+label = GMT:
+
+[date]
+tz = Greenwich
diff --git a/src/common.c b/src/common.c
new file mode 100644
index 0000000..6d5d540
--- /dev/null
+++ b/src/common.c
@@ -0,0 +1,77 @@
+/**
+ * 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 "common.h"
+#include <stdio.h>
+
+int str_is_empty(char* str) {
+  int i = 0;
+  while(str[i] == ' ' || str[i] == '\t')
+    i++;
+  if(str[i] == '\0' || str[i] == '\n')
+    return 1;
+  return 0;
+}
+
+char* trim(char* str) {
+  int i = 0;
+  char* start;
+
+  // Move the cursor forward
+  while(str[i] == ' ' || str[i] == '\t')
+    i++;
+  start = &str[i];
+
+  // Reset i to end of string
+  i = strlen(str) - 1;
+  while(str[i] == ' ' || str[i] == '\t' || str[i] == '\n')
+    i--;
+
+  if(str[i] != '\0')
+    str[i + 1] = '\0';
+  return start;
+}
+
+void print_bar(int width, float percent, char* buf) {
+  double fill = width * percent;
+  int i = 1;
+  int remainder = 0;
+
+  buf[0] = '[';
+
+  while(i < fill) {
+    buf[i] = ':';
+    i++;
+  }
+
+  remainder = (fill + 1 - i) * 10;
+  if(i > fill && remainder >= 5.0) {
+    buf[i] = ':';
+    i++;
+  } else if(i > fill && remainder < 5.0 && remainder > 0) {
+    buf[i] = '.';
+    i++;
+  }
+
+  while(i < width) {
+    buf[i] = ' ';
+    i++;
+  }
+
+  buf[i] = ']';
+  buf[i+1] = '\0';
+}
diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..a49aaaa
--- /dev/null
+++ b/src/common.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/>.
+ */
+#include <string.h>
+
+#define C_LGREY  "#dddddd"
+#define C_DGREY  "#999999"
+#define C_RED    "#bf616a"
+#define C_ORANGE "#eeaa77"
+#define C_YELLOW "#dddd99"
+#define C_GREEN  "#aaddaa"
+#define C_BLUE   "#aaccee"
+
+int str_is_empty(char*);
+char* trim(char*);
+void print_bar(int, float, char*);
diff --git a/src/config.c b/src/config.c
new file mode 100644
index 0000000..51503c3
--- /dev/null
+++ b/src/config.c
@@ -0,0 +1,124 @@
+/**
+ * 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.h"
+
+int _ini_read_header(char* line, char* out) {
+  int i = 0;
+  if(line[0] != '[') {
+    out = NULL;
+    return -1;
+  }
+  while(line[i] != ']' && line[i] != '\0')
+    i++;
+
+  strncpy(out, &line[1], i - 1);
+  out[i-1] = '\0';
+  return 0;
+}
+
+int _ini_read_keyval(char* line, char* key, char* val) {
+  int i = 0;
+  char buf[256] = {'\0'};
+  while(line[i] != '=')
+    i++;
+
+  // Copy the key
+  strncpy(&buf[0], line, i);
+  buf[i] = '\0';
+  strcpy(key, trim(buf));
+
+  // Copy the value
+  strcpy(val, trim(&line[i+1]));
+  return 0;
+}
+
+
+struct node* config_load(char* path) {
+  FILE* fd;
+  char buf[256] = {'\0'};
+  char section[256] = {'\0'};
+  char key[256] = {'\0'};
+  char val[256] = {'\0'};
+  fd = fopen(path, "r");
+
+  struct node* list = NULL;
+  struct node* cur = NULL;
+
+  if(!fd)
+    return NULL;
+
+  while(fgets(buf, 256, fd) != NULL) {
+    // Skip comments
+    if(buf[0] == '#')
+      continue;
+
+    // If we've found a section
+    if(buf[0] == '[') {
+      _ini_read_header(buf, section);
+
+      if(strcmp(section, "fs") == 0) {
+        cur = node_new(&config_fs_init);
+
+      } else if(strcmp(section, "net") == 0) {
+        cur = node_new(&config_net_init);
+
+      } else if(strcmp(section, "time") == 0) {
+        cur = node_new(&config_time_init);
+
+      } else if(strcmp(section, "date") == 0) {
+        cur = node_new(&config_date_init);
+
+      } else if(strcmp(section, "bat") == 0) {
+        cur = node_new(&config_bat_init);
+
+      } else if(strcmp(section, "mem") == 0) {
+        cur = node_new(&config_mem_init);
+
+      } else if(strcmp(section, "cpu") == 0) {
+        cur = node_new(&config_cpu_init);
+      }
+
+      if(!list)
+        list = cur;
+      else
+        lladd(list, cur);
+
+      continue;
+    }
+
+    if(str_is_empty(buf))
+      continue;
+
+    _ini_read_keyval(buf, key, val);
+
+    // Check if generic node key
+    if(strcmp(key, "label") == 0 
+       || strcmp(key, "text") == 0
+       || strcmp(key, "color") == 0
+       || strcmp(key, "label_color") == 0
+       || strcmp(key, "display") == 0) {
+      _load_node_key(cur, key, val);
+      continue;
+    }
+
+    cur->loadkey(cur, key, val);
+  }
+
+  fclose(fd);
+  return list;
+}
diff --git a/src/config.h b/src/config.h
new file mode 100644
index 0000000..8364ab5
--- /dev/null
+++ b/src/config.h
@@ -0,0 +1,31 @@
+/**
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "common.h"
+#include "config_node.h"
+#include "config_mem.h"
+#include "config_cpu.h"
+#include "config_net.h"
+#include "config_date.h"
+#include "config_time.h"
+#include "config_fs.h"
+#include "config_bat.h"
+
+struct node* config_load(char*);
diff --git a/src/config_bat.c b/src/config_bat.c
new file mode 100644
index 0000000..b25f1cc
--- /dev/null
+++ b/src/config_bat.c
@@ -0,0 +1,88 @@
+/**
+ * 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_bat.h"
+
+void config_bat_init(struct node* n) {
+  n->data = malloc(sizeof(struct config_bat));
+  n->type = CTYPE_BAT;
+  n->loadfunc = &config_bat_load;
+  n->loadkey = &load_bat_key;
+}
+
+long _fgetl(char* path) {
+  char buf[256] = {'\0'};
+  FILE* fd;
+
+  fd = fopen(path, "r");
+  fgets(buf, 256, fd);
+  fclose(fd);
+
+  return strtol(buf, NULL, 10);
+}
+
+int _bat_is_charging(char* bat) {
+  char buf[256] = {'\0'};
+  FILE* fd      = fopen(bat, "r");
+  fgets(buf, 256, fd);
+  fclose(fd);
+
+  if(strncmp(buf, "Discharging", 11) == 0)
+    return 0;
+  return 1;
+}
+
+
+int config_bat_load(struct node* n) {
+  long level;
+  char batstatus[256];
+  char batcapacity[256];
+
+  sprintf(batstatus, "/sys/class/power_supply/%s/status", ((struct config_bat*)n->data)->name);
+  sprintf(batcapacity, "/sys/class/power_supply/%s/capacity", ((struct config_bat*)n->data)->name);
+
+  level = _fgetl(batcapacity);
+
+  if(level > 70) {
+    strcpy(n->color, C_GREEN);
+  } else if(level > 50) {
+    strcpy(n->color, C_YELLOW);
+  } else if(level > 30) {
+    strcpy(n->color, C_ORANGE);
+  } else {
+    strcpy(n->color, C_RED);
+  }
+
+  if(_bat_is_charging(batstatus) == 1) {
+    sprintf(n->text + strlen(n->text), "%lc", 0x26A1);
+  } else {
+    strcat(n->text, "   ");
+  }
+
+  if(strcmp(n->display, "bar") == 0) {
+    print_bar(12, (float) level / 100, &n->text[3]);
+  } else {
+    sprintf(n->text, "%02d%%", (int)(level / 100));
+  }
+
+  return 0;
+}
+
+void load_bat_key(struct node* n, char* key, char* val) {
+  if(strcmp(key, "name") == 0)
+    strcpy(((struct config_bat*)n->data)->name, val);
+}
diff --git a/src/config_bat.h b/src/config_bat.h
new file mode 100644
index 0000000..e310a98
--- /dev/null
+++ b/src/config_bat.h
@@ -0,0 +1,40 @@
+/**
+ * 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_BAT
+#define CONFIG_BAT
+
+#define CTYPE_BAT   50
+
+#include <string.h>
+#include "common.h"
+#include "config_node.h"
+
+struct config_bat {
+  char name[64];
+  int max;
+  int cur;
+};
+
+
+void config_bat_init(struct node*);
+
+int config_bat_load(struct node*);
+
+void load_bat_key(struct node*, char*, char*);
+
+#endif
diff --git a/src/config_cpu.c b/src/config_cpu.c
new file mode 100644
index 0000000..c194893
--- /dev/null
+++ b/src/config_cpu.c
@@ -0,0 +1,68 @@
+/**
+ * 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_cpu.h"
+
+void config_cpu_init(struct node* n) {
+  n->data = NULL;
+  n->type = CTYPE_CPU;
+  n->loadfunc = &config_cpu_load;
+  n->loadkey = &load_cpu_key;
+}
+
+void load_cpu_key(struct node* n, char* key, char* val) {
+}
+
+int config_cpu_load(struct node* n) {
+  double avgs[1] = {0};
+  double level = 0;
+  int nproc = 0;
+
+  nproc = get_nprocs();
+  getloadavg(avgs, 1);
+
+  if(n->label[0] == '\0')
+    strcpy(n->label, "cpu:");
+
+  // Get level
+  if(nproc < avgs[0]) {
+    level = 1;
+  } else {
+    level = avgs[0] / nproc;
+  }
+
+  // Set color
+  if(level > .8) {
+    strcpy(n->color, C_RED);
+  } else if(level > .5) {
+    strcpy(n->color, C_ORANGE);
+  } else if(level > .3) {
+    strcpy(n->color, C_YELLOW);
+  } else {
+    strcpy(n->color, C_GREEN);
+  }
+
+  if(strcmp(n->display, "bar") == 0) {
+    print_bar(12, (float) level, n->text);
+  } else {
+    // Default to percent display
+    sprintf(n->text, "%02d%%", (int)(level * 100));
+  }
+  return 0;
+}
+
+
diff --git a/src/config_cpu.h b/src/config_cpu.h
new file mode 100644
index 0000000..3d012e7
--- /dev/null
+++ b/src/config_cpu.h
@@ -0,0 +1,32 @@
+/**
+ * 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_CPU
+#define CONFIG_CPU
+
+#include <stdlib.h>
+#include <sys/sysinfo.h>
+#include "common.h"
+#include "config_node.h"
+
+#define CTYPE_CPU   70
+
+void config_cpu_init(struct node* n);
+void load_cpu_key(struct node* n, char* key, char* val);
+int config_cpu_load(struct node* n);
+
+#endif
diff --git a/src/config_date.c b/src/config_date.c
new file mode 100644
index 0000000..10a6a78
--- /dev/null
+++ b/src/config_date.c
@@ -0,0 +1,47 @@
+/**
+ * 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_date.h"
+
+void config_date_init(struct node* n) {
+  n->data = malloc(sizeof(struct config_date));
+  n->type = CTYPE_DATE;
+  n->loadfunc = &config_date_load;
+  n->loadkey = &load_date_key;
+}
+
+void load_date_key(struct node* n, char* key, char* val) {
+  if(strcmp(key, "tz") == 0)
+    strcpy(((struct config_date*) n->data)->tz, val);
+  else
+    printf("ERROR: Unknown time key %s\n", key);
+}
+
+int config_date_load(struct node* n) {
+  char buf[256];
+  time_t timep;
+  struct tm* info;
+
+  setenv("TZ", ((struct config_date*)n->data)->tz, 1);
+  time(&timep);
+  info = localtime(&timep);
+
+  strftime(buf, 256, "%F", info);
+  strcpy(n->label, buf);
+  strcpy(n->color, C_LGREY);
+  return 0;
+}
diff --git a/src/config_date.h b/src/config_date.h
new file mode 100644
index 0000000..b6dd0c2
--- /dev/null
+++ b/src/config_date.h
@@ -0,0 +1,36 @@
+/**
+ * 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_DATE
+#define CONFIG_DATE
+
+#define CTYPE_DATE  40
+
+#include <stdlib.h>
+#include <time.h>
+#include "common.h"
+#include "config_node.h"
+
+struct config_date {
+  char tz[64];
+};
+
+void config_date_init(struct node*);
+void load_date_key(struct node*, char*, char*);
+int config_date_load(struct node*);
+
+#endif
diff --git a/src/config_fs.c b/src/config_fs.c
new file mode 100644
index 0000000..45ccd46
--- /dev/null
+++ b/src/config_fs.c
@@ -0,0 +1,63 @@
+/**
+ * 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_fs.h"
+
+void config_fs_init(struct node* n) {
+  n->data = malloc(sizeof(struct config_fs));
+  n->type = CTYPE_FS;
+  n->loadfunc = &config_fs_load;
+  n->loadkey = &load_fs_key;
+}
+
+void load_fs_key(struct node* n, char* key, char* val) {
+  struct config_fs* data = (struct config_fs*) n->data;
+
+  if(strcmp(key, "path") == 0)
+    strcpy(data->path, val);
+  else
+    printf("ERROR: Unknown fs key %s\n", key);
+}
+
+int config_fs_load(struct node* n) {
+  struct statfs fs;
+  int percent;
+  unsigned long used;
+
+  statfs(((struct config_fs*)n->data)->path, &fs);
+
+  used = (unsigned long) fs.f_blocks - (unsigned long) fs.f_bfree;
+  percent = ((long double) used * 100) / (long double)fs.f_blocks;
+
+  if(percent > 80) {
+    strcpy(n->color, C_RED);
+  } else if(percent > 50) {
+    strcpy(n->color, C_ORANGE);
+  } else if(percent > 30) {
+    strcpy(n->color, C_YELLOW);
+  } else {
+    strcpy(n->color, C_GREEN);
+  }
+
+  if(strcmp(n->display, "bar") == 0) {
+    print_bar(10, ((long double) used) / (long double)fs.f_blocks, n->text);
+  } else {
+    sprintf(n->text, "%d%%", percent);
+  }
+  sprintf(n->label, "%s:", ((struct config_fs*)n->data)->path);
+  return 0;
+}
diff --git a/src/config_fs.h b/src/config_fs.h
new file mode 100644
index 0000000..8633ce9
--- /dev/null
+++ b/src/config_fs.h
@@ -0,0 +1,40 @@
+/**
+ * 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_FS
+#define CONFIG_FS
+
+#define CTYPE_FS    20
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/vfs.h>
+#include "common.h"
+#include "config_node.h"
+
+struct config_fs {
+  char path[128];
+  char label[128];
+};
+
+void config_fs_init(struct node*);
+
+int config_fs_load(struct node*);
+
+void load_fs_key(struct node*, char*, char*);
+
+#endif
diff --git a/src/config_mem.c b/src/config_mem.c
new file mode 100644
index 0000000..699e22e
--- /dev/null
+++ b/src/config_mem.c
@@ -0,0 +1,68 @@
+/**
+ * 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_mem.h"
+
+void config_mem_init(struct node* n) {
+  n->data = NULL;
+  n->type = CTYPE_MEM;
+  n->loadfunc = &config_mem_load;
+  n->loadkey = &load_mem_key;
+}
+
+void load_mem_key(struct node* n, char* key, char* val) {
+}
+
+int config_mem_load(struct node* n) {
+  long total;
+  long free;
+  long available;
+
+  int percent;
+  long used;
+
+  // See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773
+  FILE* fd = fopen("/proc/meminfo", "r");
+  fscanf(fd, "MemTotal: %ld kB ", &total);
+  fscanf(fd, "MemFree: %ld kB ", &free);
+  fscanf(fd, "MemAvailable: %ld kB ", &available);
+  fclose(fd);
+
+  used = total - available;
+  percent = used * 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)used / total, n->text);
+  } else {
+    sprintf(n->text, "%02d%%", percent);
+  }
+
+  return 0;
+}
+
+
diff --git a/src/config_mem.h b/src/config_mem.h
new file mode 100644
index 0000000..77e5021
--- /dev/null
+++ b/src/config_mem.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_MEM
+#define CONFIG_MEM
+
+#include "common.h"
+#include "config_node.h"
+
+#define CTYPE_MEM   60
+
+void config_mem_init(struct node*);
+int config_mem_load(struct node*);
+void load_mem_key(struct node*, char*, char*);
+
+#endif
diff --git a/src/config_net.c b/src/config_net.c
new file mode 100644
index 0000000..fe600d7
--- /dev/null
+++ b/src/config_net.c
@@ -0,0 +1,81 @@
+/**
+ * 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_net.h"
+
+void config_net_init(struct node* n) {
+  n->data = malloc(sizeof(struct config_net));
+  n->type = CTYPE_NET;
+  n->loadfunc = &config_net_load;
+  n->loadkey = &load_net_key;
+}
+
+
+void load_net_key(struct node* n, char* key, char* val) {
+  struct config_net* data = (struct config_net*) n->data;
+
+  if(strcmp(key, "ifname") == 0)
+    strcpy(data->ifname, val);
+  else
+    printf("ERROR: Unknown net key %s\n", key);
+}
+
+
+int config_net_load(struct node* n) {
+  struct ifaddrs *addrs,*tmp;
+  char host[224] = "--";
+  strcpy(n->color, C_RED);
+
+  getifaddrs(&addrs);
+  tmp = addrs;
+  
+  while (tmp) {
+    if(strcmp(tmp->ifa_name, ((struct config_net*)n->data)->ifname) == 0) {
+      // Skip if no address is present
+      if(! tmp->ifa_addr) {
+        tmp = tmp->ifa_next;
+        continue;
+      }
+
+      // Ensure sa_family is type 2 (17 doesn't have an IP)
+      if(tmp->ifa_addr->sa_family != 2) {
+        tmp = tmp->ifa_next;
+        continue;
+      }
+
+      // Get the device IP address
+      getnameinfo(
+          tmp->ifa_addr,
+          sizeof(struct sockaddr_in),
+          host,
+          NI_MAXHOST,
+          NULL,
+          0,
+          NI_NUMERICHOST);
+
+      strcpy(n->color, C_GREEN);
+      break;
+    }
+    tmp = tmp->ifa_next;
+  }
+  freeifaddrs(addrs);
+
+  strcpy(n->label_color, C_LGREY);
+  strcpy(n->text, host);
+  return 0;
+}
+
diff --git a/src/config_net.h b/src/config_net.h
new file mode 100644
index 0000000..8d971fc
--- /dev/null
+++ b/src/config_net.h
@@ -0,0 +1,39 @@
+/**
+ * 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_NET
+#define CONFIG_NET
+
+#include <stdio.h>
+#include <string.h>
+#include <ifaddrs.h>
+#include <netdb.h>
+
+#include "common.h"
+#include "config_node.h"
+
+#define CTYPE_NET   10
+
+struct config_net {
+  char ifname[32];
+};
+
+void config_net_init(struct node*);
+int config_net_load(struct node*);
+void load_net_key(struct node*, char*, char*);
+
+#endif
diff --git a/src/config_node.c b/src/config_node.c
new file mode 100644
index 0000000..dcccc00
--- /dev/null
+++ b/src/config_node.c
@@ -0,0 +1,74 @@
+/**
+ * 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_node.h"
+
+
+struct node* node_new(void (*init_callback)(struct node*)) {
+  struct node* out = malloc(sizeof(struct node));
+  out->data = NULL;
+  out->next = NULL;
+  out->display[0] = '\0';
+  out->text[0] = '\0';
+  out->label[0] = '\0';
+  strcpy(out->color, "#eeeeee");
+  strcpy(out->label_color, "#eeeeee");
+  init_callback(out);
+  return out;
+}
+
+
+struct node* lladd(struct node* list, struct node* next) {
+  while(list->next)
+    list = list->next;
+  list->next = next;
+  return next;
+}
+
+void llfree(struct node* list) {
+  struct node* next = list;
+  while(next) {
+    next = list->next;
+    free(list);
+  }
+}
+
+void _load_node_key(struct node* n, char* key, char* val) {
+  if(strcmp(key, "color") == 0)
+    strcpy(n->color, val);
+  else if(strcmp(key, "label_color") == 0)
+    strcpy(n->label_color, val);
+  else if(strcmp(key, "label") == 0)
+    strcpy(n->label, val);
+  else if(strcmp(key, "text") == 0)
+    strcpy(n->text, val);
+  else if(strcmp(key, "display") == 0)
+    strcpy(n->display, val);
+  else
+    printf("ERROR: Unknown node key %s\n", key);
+}
+
+void node_print(struct node* n) {
+  printf("{ \"full_text\":\" %s\", \"color\": \"%s\", \"separator\":false },",
+      n->label,
+      n->label_color);
+  printf("{ \"full_text\":\" %s \", \"color\":\"%s\" }", n->text, n->color);
+  if(n->next)
+    printf(",");
+  printf("\n");
+  fflush(stdout);
+}
diff --git a/src/config_node.h b/src/config_node.h
new file mode 100644
index 0000000..520c533
--- /dev/null
+++ b/src/config_node.h
@@ -0,0 +1,49 @@
+/**
+ * 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_NODE
+#define CONFIG_NODE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct node {
+  struct node* next;
+  int type;
+  void* data;                    // Additional data for the specific node type
+  int (*loadfunc)(struct node*); // callback function so modules can manipulate their node entity
+  void (*loadkey)(struct node*, char*, char*);  // callback function to load a type-specific ini key
+  char color[8];                 // Color to print
+  char label_color[8];           // Color to print
+  char label[256];               // Label for the node
+  char text[256];                // Value for full_text
+  char display[64];              // How to display the data (eg: bar, percent, etc)
+};
+
+//struct node* config_node_new(void* data, void(*init_callback)(struct node*)) {
+struct node* node_new(void (*init_callback)(struct node*));
+
+struct node* lladd(struct node*, struct node*);
+
+void llfree(struct node*);
+
+void _load_node_key(struct node*, char*, char*);
+
+void node_print(struct node*);
+
+#endif
diff --git a/src/config_time.c b/src/config_time.c
new file mode 100644
index 0000000..e7c3866
--- /dev/null
+++ b/src/config_time.c
@@ -0,0 +1,50 @@
+/**
+ * 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_time.h"
+
+void config_time_init(struct node* n) {
+  n->data = malloc(sizeof(struct config_time));
+  n->type = CTYPE_TIME;
+  n->loadfunc = &config_time_load;
+  n->loadkey = &load_time_key;
+}
+
+
+void load_time_key(struct node* n, char* key, char* val) {
+  if(strcmp(key, "tz") == 0)
+    strcpy(((struct config_time*) n->data)->tz, val);
+  else
+    printf("ERROR: Unknown time key %s\n", key);
+}
+
+
+int config_time_load(struct node* n) {
+  time_t timep;
+  struct tm* info;
+
+  setenv("TZ", ((struct config_time*)n->data)->tz, 1);
+  time(&timep);
+  info = localtime(&timep);
+
+  strftime(n->text, 256, "%T", info);
+
+  strcpy(n->color, C_DGREY);
+  strcpy(n->label_color, C_LGREY);
+
+  return 0;
+}
diff --git a/src/config_time.h b/src/config_time.h
new file mode 100644
index 0000000..624dd84
--- /dev/null
+++ b/src/config_time.h
@@ -0,0 +1,38 @@
+/**
+ * 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_TIME
+#define CONFIG_TIME
+
+#define CTYPE_TIME  30
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "common.h"
+#include "config_node.h"
+
+struct config_time {
+  char tz[256];
+};
+
+void config_time_init(struct node*);
+void load_time_key(struct node*, char*, char*);
+int config_time_load(struct node*);
+
+#endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..64d2ff4
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,67 @@
+/**
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <locale.h>
+
+#include "common.h"
+#include "config.h"
+
+#define xstr(s) str(s)
+#define str(s)  #s
+
+
+int main(int argc, char* argv[]) {
+  char confpath[256];
+  int sleeptime = 500 * 1000; // 200 ms * 1000
+  struct node* list = NULL;
+  struct node* cur = NULL;
+
+  // Required for unicode symbols to work
+  setlocale(LC_ALL, "");
+
+  // Build the config path
+  sprintf(confpath, "%s/.config/i3cstat.conf", getenv("HOME"));
+
+  list = config_load(confpath);
+  if(!list) {
+    printf("Error: Could load config file from %s\n", confpath);
+    return 2;
+  }
+  cur = list;
+
+  printf("{ \"version\": 1 }\n");
+  printf("[\n[],\n");
+
+  while(1) {
+    printf("[\n");
+    while(cur) {
+      cur->loadfunc(cur);
+      node_print(cur);
+      cur = cur->next;
+    }
+    cur = list;
+    printf("],\n");
+    usleep(sleeptime);
+  }
+
+  return 0;
+}
diff --git a/tests/assert.c b/tests/assert.c
new file mode 100644
index 0000000..01a7e3b
--- /dev/null
+++ b/tests/assert.c
@@ -0,0 +1,52 @@
+/**
+ * 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 "assert.h"
+
+int assert_strncmp(char* s1, char* s2, size_t n) {
+  if(strncmp(s1, s2, n) == 0) {
+    printf("[%sPASS%s]   First %d chars of '%s' are '%s'\n",
+        CGREEN, CRESET, (int)n, s1, s2);
+    return 1;
+  }
+
+  printf("[%sFAIL%s]   First %d chars of '%s' are NOT '%s'\n",
+      CRED, CRESET, (int)n, s1, s2);
+  return -1;
+}
+
+int assert_strcmp(char* s1, char* s2) {
+  if(strcmp(s1, s2) == 0) {
+    printf("[%sPASS%s]   '%s' == '%s'\n",
+        CGREEN, CRESET, s1, s2);
+    return 1;
+  }
+
+  printf("[%sFAIL%s]   '%s' != '%s'\n",
+      CRED, CRESET, s1, s2);
+  return -1;
+}
+
+int assert_int(char* name, int ret, int expected) {
+  if(ret == expected) {
+    printf("[%sPASS%s]", CGREEN, CRESET);
+  } else {
+    printf("[%sFAIL%s]", CRED, CRESET);
+  }
+  printf("   %s returned %d (expected %d)\n", name, ret, expected);
+  return -1;
+}
diff --git a/tests/assert.h b/tests/assert.h
new file mode 100644
index 0000000..e8322e5
--- /dev/null
+++ b/tests/assert.h
@@ -0,0 +1,34 @@
+/**
+ * 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 _LIB_ASSERT
+#define _LIB_ASSERT
+#include <stdio.h>
+#include <string.h>
+
+#define CYELLOW "\e[32m"
+#define CGREEN  "\e[32m"
+#define CRED    "\e[31m"
+#define CRESET  "\e[0m"
+
+int assert_strncmp(char*, char*, size_t);
+
+int assert_strcmp(char*, char*);
+
+int assert_int(char*, int, int);
+
+#endif
diff --git a/tests/main.c b/tests/main.c
new file mode 100644
index 0000000..45a4fb3
--- /dev/null
+++ b/tests/main.c
@@ -0,0 +1,26 @@
+/**
+ * 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 "test_common.h"
+#include "test_config.h"
+
+int main() {
+  test_bar();
+  test_str_is_empty();
+  test_config_load("i3cstat.conf.sample");
+  test_trim();
+}
diff --git a/tests/test_common.c b/tests/test_common.c
new file mode 100644
index 0000000..e08c0ee
--- /dev/null
+++ b/tests/test_common.c
@@ -0,0 +1,75 @@
+/**
+ * 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 "test_common.h"
+
+void test_str_is_empty() {
+  char* spaces="       ";
+  char* tabs="\t\t  \t \t";
+  char* empty="";
+  char* alpha=" abc ";
+  char* alphanum=" abc1234 ";
+  char* fread="        \n";
+
+  assert_int("str_is_empty spaces      ", str_is_empty(spaces), 1);
+  assert_int("str_is_empty tabs/spaces ", str_is_empty(tabs), 1);
+  assert_int("str_is_empty empty       ", str_is_empty(empty), 1);
+  assert_int("str_is_empty letters     ", str_is_empty(alpha), 0);
+  assert_int("str_is_empty alphanumeric", str_is_empty(alphanum), 0);
+  assert_int("str_is_empty fread       ", str_is_empty(fread), 1);
+}
+
+void test_bar() {
+  char buf[64] = {'\0'};
+  char buf2[64] = "foo: ";
+
+  // Fill is 0, so no colons or periods
+  print_bar(10, 0, buf);
+  assert_strncmp(buf, "[  ", 3);
+
+  // Fill is 2, +.5, so three colons
+  print_bar(10, .25, buf);
+  assert_strncmp(buf, "[::: ", 5);
+
+  // Fill is 2, +.3, so two colons and a period
+  print_bar(10, .23, buf);
+  assert_strncmp(buf, "[::. ", 5);
+
+  // Fill is 2, +.3, so two colons and a period
+  print_bar(10, .23, &buf2[5]);
+  assert_strncmp(buf2, "foo: [::. ", 10);
+}
+
+void test_trim() {
+  char buf[256];
+  char none[64]  = "needs none";
+  char left[64]  = "  needs left";
+  char right[64] = "needs right  ";
+  char both[64]  = "  needs both  ";
+
+  strcpy(buf, trim(none));
+  assert_strcmp(buf, "needs none");
+
+  strcpy(buf, trim(left));
+  assert_strcmp(buf, "needs left");
+
+  strcpy(buf, trim(right));
+  assert_strcmp(buf, "needs right");
+
+  strcpy(buf, trim(both));
+  assert_strcmp(buf, "needs both");
+}
diff --git a/tests/test_common.h b/tests/test_common.h
new file mode 100644
index 0000000..f06f872
--- /dev/null
+++ b/tests/test_common.h
@@ -0,0 +1,28 @@
+/**
+ * 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 "../src/common.h"
+#include "assert.h"
+
+#ifndef _TEST_COMMON
+#define _TEST_COMMON
+
+void test_str_is_empty();
+void test_bar();
+void test_trim();
+
+#endif
diff --git a/tests/test_config.c b/tests/test_config.c
new file mode 100644
index 0000000..d280895
--- /dev/null
+++ b/tests/test_config.c
@@ -0,0 +1,27 @@
+/**
+ * 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 "test_config.h"
+
+void test_config_load(char* path) {
+  void* config;
+  config = config_load(path);
+
+  if(!config) {
+    printf("ERROR: Could not load test config file %s\n", path);
+  }
+}
diff --git a/tests/test_config.h b/tests/test_config.h
new file mode 100644
index 0000000..8b32697
--- /dev/null
+++ b/tests/test_config.h
@@ -0,0 +1,27 @@
+/**
+ * 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 <stdio.h>
+#include "assert.h"
+#include "../src/config.h"
+
+#ifndef _TEST_CONFIG
+#define _TEST_CONFIG
+
+void test_config_load(char*);
+
+#endif