feat(build): use meson so I don't end up ripping my hair out

Makefile

@@ -1,20 +0,0 @@
-include config.mk
-
-PROG ?= eh
-OBJS = main.o\
-			 lib/log.c/src/log.o\
-			 include/led.o\
-			 include/acpi.o\
-			 include/utils.o
-
-all: $(PROG)
-
-# main build task
-.c.h.o:
-	$(CC) $(CFLAGS) -o $@ $<
-
-$(PROG): $(OBJS)
-	$(CC) $(CFLAGS) -o $@ $(OBJS)
-
-clean:
-	rm $(PROG) $(OBJS)

config.h

@@ -2,6 +2,9 @@
 
 static const char *notification_name = "Event Handler"; /* name to use in notifications */
 static const char *battery_dir = "/sys/class/power_supply/BAT1"; /* path to the batteries directory */
+static const char *linefile = "/sys/class/power_supply/ACAD/online"; /* path to the file which tells us if we are online (plugged in) */
+static const char *ledfile = "/sys/class/leds/input0::capslock/brightness"; /* path to the file which lights up the led */
+static const char *acpid_sock = "/run/acpid.socket"; /* acpid socket file */
 static const int blink_start = 15;  /* percentage to start blinking at */
 const double blink_formula(int x) { /* formula used to set the blinking rate, this function takes in one argument: the battery percentage */
   return 1.7 + 18.5 * exp(-0.29 * x);

config.mk

@@ -1,8 +0,0 @@
-PKG_CONFIG = pkg-config
-CC = cc
-VERSION = 0.1
-
-# flags and incs
-INCLUDES = -I./lib/log.c/src
-PKGS     =
-CFLAGS   = -DVERSION=\"$(VERSION)\" $(INCLUDES) -DLOG_USE_COLOR -Wall -Og -g -lm

include/acpi.h

@@ -1,4 +1,33 @@
-int acpi_create_socket(char *socket_file);
+#pragma once
+
+/**
+ * @brief parse output of acpid
+ *
+ * @param str input from acpi socket
+ * @param out the parsed version of it
+ * @return 0 on success
+ */
 int acpi_parse(char *str, char **out);
-int acpi_close_socket(int sockfd);
+
+/**
+ * @brief cleanup the results of acpi_parse
+ *
+ * @param out the pointer to the output from acpi_parse
+ */
 void acpi_clean_parse(char *out[4]);
+
+/**
+ * @brief create a new acpi socket connection
+ *
+ * @param socket_file path to the socket file
+ * @return the socket fd
+ */
+int acpi_create_socket(char *socket_file);
+
+/**
+ * @brief close the socket connection
+ *
+ * @param sockfd the sockets fd
+ * @return 0 on success 1 on error
+ */
+int acpi_close_socket(int sockfd);

include/led.h

@@ -1,2 +1,16 @@
+#pragma once
+
+/**
+ * @brief create the led thread
+ *
+ * @param file file to send blinking signals to
+ * @return 0 on success
+ */
 int led_create_thread(char *file);
+
+/**
+ * @brief set the led rate
+ *
+ * @param r number of blinks per second
+ */
 void led_set_rate(double rate);

include/utils.h

@@ -1,2 +1,20 @@
+#pragma once
+
+/**
+ * @brief get a substring of a string
+ *
+ * @param s string
+ * @param pos first pos
+ * @param l length
+ * @return the substring
+ */
 char *get_substring(char *s, int pos, int l);
+
+/**
+ * @brief concatinate two strings
+ *
+ * @param s1 first
+ * @param s2 second
+ * @return the concatinated string
+ */
 char *concat(const char *s1, const char *s2);

meson.build

@@ -0,0 +1,29 @@
+project('acpi-event-handler', 'c')
+
+add_project_arguments([
+  '-DLOG_USE_COLOR' # enable colored logs
+], language: 'c')
+
+srcfiles = files(
+  'src/main.c',
+  'src/led.c',
+  'src/acpi.c',
+  'src/utils.c'
+)
+
+cc = meson.get_compiler('c')
+math_dep = cc.find_library('m', required: true)
+
+executable('eh', srcfiles,
+  dependencies: [
+    math_dep
+  ],
+  include_directories: [
+    'lib/log.c/src',
+    'include'
+  ],
+  link_with: [
+    static_library('log.c', 'lib/log.c/src/log.c',
+      include_directories: 'lib/log.c/src')
+  ]
+)

src/acpi.c

@@ -9,13 +9,6 @@
 #include "acpi.h"
 #include "utils.h"
 
-/**
- * @brief parse output of acpid
- *
- * @param str input from acpi socket
- * @param out the parsed version of it
- * @return 0 on success
- */
 int
 acpi_parse(char *str, char **out)
 {
@@ -46,11 +39,6 @@ acpi_parse(char *str, char **out)
   return 0;
 }
 
-/**
- * @brief cleanup the results of acpi_parse
- *
- * @param out the pointer to the output from acpi_parse
- */
 void
 acpi_clean_parse(char *out[4])
 {
@@ -63,12 +51,6 @@ acpi_clean_parse(char *out[4])
   }
 }
 
-/**
- * @brief create a new acpi socket connection
- *
- * @param socket_file path to the socket file
- * @return the socket fd
- */
 int
 acpi_create_socket(char *socket_file)
 {
@@ -98,12 +80,6 @@ acpi_create_socket(char *socket_file)
   return sock_fd;
 }
 
-/**
- * @brief close the socket connection
- *
- * @param sockfd the sockets fd
- * @return 0 on success 1 on error
- */
 int
 acpi_close_socket(int sockfd) {
   if (close(sockfd) < 0) {

src/led.c

@@ -118,12 +118,6 @@ pre_exit(int signal)
   exit(0);
 }
 
-/**
- * @brief create the led thread
- *
- * @param file file to send blinking signals to
- * @return 0 on success
- */
 int
 led_create_thread(char *file)
 {
@@ -175,11 +169,6 @@ led_create_thread(char *file)
   return 0;
 }
 
-/**
- * @brief set the led rate
- *
- * @param r number of blinks per second
- */
 void
 led_set_rate(double r)
 {

src/main.c

@@ -13,14 +13,12 @@
 #include <stdbool.h>
 
 #include "log.h"
-#include "include/led.h"
-#include "include/acpi.h"
-#include "include/utils.h"
+#include "led.h"
+#include "acpi.h"
+#include "utils.h"
 
 #include "config.h"
 
-#define SOCKET_FILE "/run/acpid.socket"
-#define LED_FILE "/sys/class/leds/input0::capslock/brightness"
 #define MAX_BUFLEN 1024
 
 char
@@ -98,7 +96,7 @@ on_battery_event(char *percent, bool plugged)
 int
 main(int argc, char *argv[])
 {
-  bool plugged = plugged_in("/sys/class/power_supply/ACAD/online");
+  bool plugged = plugged_in((char *)linefile);
   char buffer[MAX_BUFLEN], *out[4];
   int sock_fd;
 
@@ -106,10 +104,10 @@ main(int argc, char *argv[])
   log_set_level(LOG_DEBUG);
 
   /* open up socket address */
-  sock_fd = acpi_create_socket(SOCKET_FILE);
+  sock_fd = acpi_create_socket((char *)acpid_sock);
 
   /* create the led thread */
-  led_create_thread(LED_FILE);
+  led_create_thread((char *)ledfile);
 
   /* run events that need to be run on start to ensure that the current state
    * inside the program reflects that that is outside the program

src/utils.c

@@ -5,14 +5,6 @@
 #include "utils.h"
 #include "log.h"
 
-/**
- * @brief get a substring of a string
- *
- * @param s string
- * @param pos first pos
- * @param l length
- * @return the substring
- */
 char
 *get_substring(char *s, int pos, int l)
 {
@@ -41,13 +33,6 @@ char
   return out;
 }
 
-/**
- * @brief concatinate two strings
- *
- * @param s1 first
- * @param s2 second
- * @return the concatinated string
- */
 char
 *concat(const char *s1, const char *s2)
 {
@@ -58,7 +43,7 @@ char
   len2 = strlen(s2);
 
   /* attempt to allocate size for the new string */
-  result = malloc(len1 + len2 + 1);
+  result = malloc((len1 + len2 + 1) * sizeof(char));
   if (result == NULL) {
     log_fatal("malloc: %s", strerror(errno));
     exit(1);