merged all of the different modules into one compact, but readable and simple file

source/lib_linux.c

@@ -0,0 +1,255 @@
+#ifdef __gnu_linux__
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/sysinfo.h>
+#include <math.h>
+
+#define MAXC 1024
+#define MAXC_CHAR 256
+
+typedef struct {
+
+  int frequency;
+  char* name;
+  int threads;
+
+} cpu_s;
+
+typedef struct {
+
+  unsigned long mem_size;
+
+} ram;
+
+unsigned long get_total(void);
+unsigned long get_usage(void);
+long device_up_time(void);
+void name();
+void temperature();
+void freq();
+void *cpu_i(void *a);
+void *ram_i(void *a);
+void cpu_name(void);
+void cpu_temperature(unsigned short delay);
+char* cpu_frequency(void);
+
+cpu_s _cpu;
+
+void *cpu_name(){
+  int buffer_size = 256;
+  char cpu_name[buffer_size];
+
+  printf("Opening the CPU information files");
+  FILE *fp = fopen("/proc/cpuinfo", "r");
+  if (!fp)
+    printf("can't open /proc/cpuinfo");
+
+  char line[buffer_size];
+  while (fgets(line, sizeof(line), fp))
+  {
+    if (strncmp(line, "model name", 10) == 0)
+    {
+      char *colon = strchr(line, ':');
+      if (colon)
+      {
+        snprintf(cpu_name, buffer_size, "%s", colon + 2);
+        cpu_name[strcspn(cpu_name, "\n")] = 0;
+        int err = fclose(fp);
+        if (err != 0)
+          printf("error closing /proc/cpuinfo");
+      }
+    }
+  }
+
+  _cpu.name = cpu_name;
+
+  return NULL;
+}
+
+char* cpu_frequency() {
+  char* buffer = malloc(MAXC_CHAR);
+
+  FILE *fp = fopen("/proc/cpuinfo", "r");
+  if (!fp) {
+    printf("can't open /proc/cpuinfo");
+    return NULL;
+  }
+
+  while (fgets(buffer, MAXC_CHAR, fp)) {
+    if (strstr(buffer, "cpu MHz") != NULL)
+    {
+      char *colon = strchr(buffer, ':');
+      if (colon)
+      {
+        buffer[strcspn(buffer, "\n")] = 0;
+        snprintf(buffer, MAXC_CHAR, "%s", colon);
+      }
+    }
+
+    fclose(fp);
+    return buffer;
+  }
+  return NULL;
+}
+
+void *cpu_i(void *a){
+  printf("thread is working");
+
+  return(NULL);
+}
+
+unsigned long get_total(void){
+
+  struct sysinfo info;
+
+  if (sysinfo(&info) != 0) {
+    perror("sysinfo");
+    return 1;
+  }
+
+  long total_ram = info.totalram * info.mem_unit;
+  return total_ram;
+
+}
+
+unsigned long get_usage(void)
+{
+  struct sysinfo info;
+
+  if (sysinfo(&info) != 0) {
+    perror("sysinfo");
+    return 1;
+  }
+
+  long total_ram = info.totalram * info.mem_unit;
+  long free_ram = info.freeram * info.mem_unit;
+
+  return total_ram - free_ram;
+}
+
+void *ram_i(void *a){
+
+  printf("thread is working");
+  return NULL;
+}
+
+void cpu_name(void)
+{
+  int buffer_size = 256;
+  char cpu_name[buffer_size];
+
+  FILE *fp = fopen("/proc/cpuinfo", "r");
+  if (!fp)
+    printf("can't open /proc/cpuinfo");
+
+  char line[buffer_size];
+  while (fgets(line, sizeof(line), fp))
+  {
+    if (strncmp(line, "model name", 10) == 0)
+    {
+      char *colon = strchr(line, ':');
+      if (colon)
+      {
+        snprintf(cpu_name, buffer_size, "%s", colon + 2);
+        cpu_name[strcspn(cpu_name, "\n")] = 0;
+        int err = fclose(fp);
+        if (err != 0)
+          printf("error closing /proc/cpuinfo");
+
+      }
+    }
+  }
+
+  printf("%s", cpu_name);
+  snprintf(cpu_name, buffer_size, "%s", cpu_name);
+}
+
+void cpu_temperature(unsigned short delay)
+{
+  while (1)
+  {
+    sleep(delay);
+    FILE *pf = fopen("/sys/class/thermal/thermal_zone0/temp", "r");
+    if (!pf)
+      printf("error reading /proc/cpuinfo");
+
+    char buffer[MAXC];
+    while (fgets(buffer, sizeof(buffer), pf))
+    {
+      int a = atoi(buffer);
+      a /= 1000;
+      printf("%dC\n", a);
+      fflush(stdout);
+    }
+    fclose(pf);
+  }
+}
+
+char* cpu_frequency(void) {
+  char* buffer = malloc(MAXC_CHAR);
+
+  FILE *fp = fopen("/proc/cpuinfo", "r");
+  if (!fp) {
+    printf("can't open /proc/cpuinfo");
+    return NULL;
+  }
+
+  while (fgets(buffer, MAXC_CHAR, fp)) {
+    if (strstr(buffer, "cpu MHz") != NULL)
+    {
+      char *colon = strchr(buffer, ':');
+      if (colon)
+      {
+        buffer[strcspn(buffer, "\n")] = 0;
+        snprintf(buffer, MAXC_CHAR, "%s", colon);
+      }
+    }
+
+    fclose(fp);
+    return buffer;
+  }
+  return NULL;
+}
+
+unsigned long get_total(void){
+
+  struct sysinfo info;
+
+  if (sysinfo(&info) != 0) {
+    perror("sysinfo");
+    return 1;
+  }
+
+  long total_ram = info.totalram * info.mem_unit; 
+  return total_ram;
+
+}
+
+unsigned long get_usage(void) 
+{
+  struct sysinfo info;
+
+  if (sysinfo(&info) != 0) {
+    perror("sysinfo");
+    return 1;
+  }
+
+  long total_ram = info.totalram * info.mem_unit; 
+  long free_ram = info.freeram * info.mem_unit;   
+
+  return total_ram - free_ram;
+}
+
+long device_up_time(void){
+  struct sysinfo info;
+  if (sysinfo(&info) == -1)
+    perror("sysinfo");
+
+  return info.uptime;
+}
+