i3blocks/bandwidth2.c
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#include <stdio.h> #include <stdlib.h> #include <time.h> #include <string.h> #include <unistd.h> #include <getopt.h> #define RED "#FF7373" #define ORANGE "#FFA500" typedef unsigned long long int ulli; enum { STATE_OK, STATE_WARNING, STATE_CRITICAL, STATE_UNKNOWN, }; void usage(char *argv[]) { printf("Usage: %s [-b|B] [-t seconds] [-i interface] [-w Bytes:Bytes] [-c Bytes:Bytes] [-h]\n", argv[0]); printf("\n"); printf("-b \t\tuse bits/s\n"); printf("-B \t\tuse Bytes/s (default)\n"); printf("-t seconds\trefresh time (default is 1)\n"); printf("-i interface\tnetwork interface to monitor. If not specified, check all interfaces.\n"); printf("-w Bytes:Bytes\tSet warning (color orange) for Rx:Tx bandwidth. (default: none)\n"); printf("-c Bytes:Bytes\tSet critical (color red) for Rx:Tx bandwidth. (default: none)\n"); printf("-h \t\tthis help\n"); printf("\n"); } void get_values(char *const iface, time_t * const s, ulli * const received, ulli * const sent) { FILE *f; f = fopen("/proc/net/dev", "r"); if (!f) { fprintf(stderr, "Can't open /proc/net/dev\n"); exit(STATE_UNKNOWN); } ulli temp_r, temp_s; char line[BUFSIZ]; char ifname[BUFSIZ]; *received = 0; *sent = 0; while (fgets(line, BUFSIZ - 1, f) != NULL) { if (sscanf(line, "%s %llu %*u %*u %*u %*u %*u %*u %*u %llu", ifname, &temp_r, &temp_s) == 3) { if (iface && strcmp(iface, ifname) != 0) { continue; } if (strcmp(ifname, "lo:") == 0) continue; *received = *received + temp_r; *sent = *sent + temp_s; } } fclose(f); *s = time(NULL); if (!s) { fprintf(stderr, "Can't get Epoch time\n"); exit(STATE_UNKNOWN); } } void display(int const unit, double b, int const warning, int const critical) { if (critical != 0 && b > critical) { printf("<span color='%s'>", RED); } else if (warning != 0 && b > warning) { printf("<span color='%s'>", ORANGE); } else { printf("<span>"); } if (unit == 'b') b = b * 8; if (b < 1024) { printf("%5.1lf %c/s", b, unit); } else if (b < 1024 * 1024) { printf("%5.1lf K%c/s", b / 1024, unit); } else if (b < 1024 * 1024 * 1024) { printf("%5.1lf M%c/s", b / (1024 * 1024), unit); } else { printf("%5.1lf G%c/s", b / (1024 * 1024 * 1024), unit); } printf("</span>"); } int main(int argc, char *argv[]) { int c, unit = 'B', t = 1; char iface[BUFSIZ] = {0}; int warningrx = 0, warningtx = 0, criticalrx = 0, criticaltx = 0; char *envvar = NULL; char *label = ""; envvar = getenv("USE_BITS"); if (envvar && *envvar == '1') unit = 'b'; envvar = getenv("USE_BYTES"); if (envvar && *envvar == '1') unit = 'B'; envvar = getenv("REFRESH_TIME"); if (envvar) t = atoi(envvar); envvar = getenv("INTERFACE"); if (envvar) snprintf(iface, BUFSIZ, "%s:", envvar); envvar = getenv("WARN_RX"); if (envvar) warningrx = atoi(envvar); envvar = getenv("WARN_TX"); if (envvar) warningtx = atoi(envvar); envvar = getenv("CRIT_RX"); if (envvar) criticalrx = atoi(envvar); envvar = getenv("CRIT_TX"); if (envvar) criticaltx = atoi(envvar); envvar = getenv("LABEL"); if (envvar) label = envvar; while (c = getopt(argc, argv, "bBht:i:w:c:"), c != -1) { switch (c) { case 'b': case 'B': unit = c; break; case 't': t = atoi(optarg); break; case 'i': snprintf(iface, BUFSIZ, "%s:", optarg); break; case 'w': sscanf(optarg, "%d:%d", &warningrx, &warningtx); break; case 'c': sscanf(optarg, "%d:%d", &criticalrx, &criticaltx); break; case 'h': usage(argv); return STATE_UNKNOWN; } } time_t s, s_old; ulli received, sent, received_old, sent_old; double rx, tx; get_values(iface, &s_old, &received_old, &sent_old); while (1) { sleep(t); get_values(iface[0] ? iface : NULL, &s, &received, &sent); rx = (received - received_old) / (float)(s - s_old); tx = (sent - sent_old) / (float)(s - s_old); printf("%s", label); display(unit, rx, warningrx, criticalrx); printf(" "); display(unit, tx, warningtx, criticaltx); printf("\n"); fflush(stdout); s_old = s; received_old = received; sent_old = sent; } return STATE_OK; }