Silence warnings reported in #70.

linux/Battery.c

@@ -117,7 +117,8 @@ static ACPresence procAcpiCheck() {
       }
 
       char line[100];
-      fgets(line, sizeof line, file);
+      char* ok = fgets(line, sizeof line, file);
+      if (!ok) continue;
       line[sizeof(line) - 1] = '\0';
 
       fclose(file);

linux/LinuxProcessList.c

@@ -344,7 +344,7 @@ static void LinuxProcessList_readOpenVZData(ProcessList* this, Process* process,
    FILE* file = fopen(filename, "r");
    if (!file) 
       return;
-   fscanf(file, 
+   (void) fscanf(file, 
       "%*32u %*32s %*1c %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
       "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
       "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
@@ -692,7 +692,8 @@ static inline double LinuxProcessList_scanCPUTime(LinuxProcessList* this) {
       // Dependending on your kernel version,
       // 5, 7, 8 or 9 of these fields will be set.
       // The rest will remain at zero.
-      fgets(buffer, 255, file);
+      char* ok = fgets(buffer, 255, file);
+      if (!ok) buffer[0] = '\0';
       if (i == 0)
          sscanf(buffer, "cpu  %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
       else {

linux/Platform.c

@@ -80,8 +80,9 @@ int Platform_getUptime() {
    double uptime = 0;
    FILE* fd = fopen(PROCDIR "/uptime", "r");
    if (fd) {
-      fscanf(fd, "%64lf", &uptime);
+      int n = fscanf(fd, "%64lf", &uptime);
       fclose(fd);
+      if (n <= 0) return 0;
    }
    return (int) floor(uptime);
 }
@@ -103,7 +104,7 @@ int Platform_getMaxPid() {
    FILE* file = fopen(PROCDIR "/sys/kernel/pid_max", "r");
    if (!file) return -1;
    int maxPid = 4194303;
-   fscanf(file, "%32d", &maxPid);
+   (void) fscanf(file, "%32d", &maxPid);
    fclose(file);
    return maxPid;
 }