+static char *
+ip(const char *interface)
+{
+ struct ifaddrs *ifaddr, *ifa;
+ int s;
+ char host[NI_MAXHOST];
+
+ if (getifaddrs(&ifaddr) == -1) {
+ fprintf(stderr, "Error getting IP address: %s\n",
+ strerror(errno));
+ return smprintf(UNKNOWN_STR);
+ }
+
+ /* get the ip address */
+ for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+ if (ifa->ifa_addr == NULL)
+ continue;
+
+ s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST,
+ NULL, 0, NI_NUMERICHOST);
+
+ if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
+ if (s != 0) {
+ fprintf(stderr, "Error getting IP address.\n");
+ return smprintf(UNKNOWN_STR);
+ }
+ return smprintf("%s", host);
+ }
+ }
+
+ /* free the address */
+ freeifaddrs(ifaddr);
+
+ return smprintf(UNKNOWN_STR);
+}
+
+static char *
+load_avg(void)
+{
+ double avgs[3];
+
+ if (getloadavg(avgs, 3) < 0) {
+ fprintf(stderr, "Error getting load avg.\n");
+ return smprintf(UNKNOWN_STR);
+ }
+
+ return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
+}
+
+static char *
+ram_free(void)
+{
+ long free;
+ FILE *fp = fopen("/proc/meminfo", "r");
+
+ if (fp == NULL) {
+ fprintf(stderr, "Error opening meminfo file: %s\n",
+ strerror(errno));
+ return smprintf(UNKNOWN_STR);
+ }
+
+ fscanf(fp, "MemFree: %ld kB\n", &free);
+ fclose(fp);
+ return smprintf("%f", (float)free / 1024 / 1024);
+}
+
+static char *
+ram_perc(void)
+{
+ int perc;
+ long total, free, buffers, cached;
+ FILE *fp = fopen("/proc/meminfo", "r");
+
+ if (fp == NULL) {
+ fprintf(stderr, "Error opening meminfo file: %s\n",
+ strerror(errno));
+ return smprintf(UNKNOWN_STR);
+ }
+
+ fscanf(fp, "MemTotal: %ld kB\n", &total);
+ fscanf(fp, "MemFree: %ld kB\n", &free);
+ fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
+ fscanf(fp, "Cached: %ld kB\n", &cached);
+
+ fclose(fp);
+ perc = 100 * ((total - free) - (buffers + cached)) / total;
+ return smprintf("%d%%", perc);
+}
+
+static char *
+ram_total(void)
+{
+ long total;
+ FILE *fp = fopen("/proc/meminfo", "r");
+
+ if (fp == NULL) {
+ fprintf(stderr, "Error opening meminfo file: %s\n",
+ strerror(errno));
+ return smprintf(UNKNOWN_STR);
+ }
+
+ fscanf(fp, "MemTotal: %ld kB\n", &total);
+ fclose(fp);
+ return smprintf("%f", (float)total / 1024 / 1024);
+}
+
+static char *
+ram_used(void)
+{
+ long free, total, buffers, cached, used;
+ FILE *fp = fopen("/proc/meminfo", "r");
+
+ if (fp == NULL) {
+ fprintf(stderr, "Error opening meminfo file: %s\n",
+ strerror(errno));
+ return smprintf(UNKNOWN_STR);
+ }
+
+ fscanf(fp, "MemTotal: %ld kB\n", &total);
+ fscanf(fp, "MemFree: %ld kB\n", &free);
+ fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
+ fscanf(fp, "Cached: %ld kB\n", &cached);
+
+ fclose(fp);
+ used = total - free - buffers - cached;
+ return smprintf("%f", (float)used / 1024 / 1024);
+}
+
+static char *
+run_command(const char* command)
+{
+ int good;
+ FILE *fp = popen(command, "r");
+ char buffer[64];
+
+ if (fp == NULL) {
+ fprintf(stderr, "Could not get command output for: %s: %s\n",
+ command, strerror(errno));
+ return smprintf(UNKNOWN_STR);
+ }
+
+ fgets(buffer, sizeof(buffer)-1, fp);
+ pclose(fp);
+ for (int i = 0 ; i != sizeof(buffer); i++) {
+ if (buffer[i] == '\0') {
+ good = 1;
+ break;
+ }
+ }
+ if (good)
+ buffer[strlen(buffer)-1] = '\0';
+ return smprintf("%s", buffer);
+}
+
+static char *