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/*
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* Copyright (C) 2017 Bastiaan van Kesteren <bas@edeation.nl> - All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License v.2 or v.3.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <libgen.h> |
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#include <sys/wait.h> |
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#include "common.h" |
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static char getitem(char *input, unsigned char item, char *output) |
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{
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unsigned char i = 0; |
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unsigned char separators = 0; |
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char know_this_seperator = 0; |
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unsigned char start = 0; |
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unsigned char stop = 0; |
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/* Trim starting spaces */
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while (input[i] == ' ') { |
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i++; |
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} |
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/* If we're requested to return the very first item... */
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if (separators == item) {
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start = i; |
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} |
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while (input[i] && separators < item + 1) { |
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if (input[i] == ' ') { |
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if (know_this_seperator == 0) { |
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know_this_seperator = 1;
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separators++; |
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if (separators == item + 1) { |
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stop = i; |
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break;
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} |
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} |
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} else if (know_this_seperator) { |
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know_this_seperator = 0;
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if (separators == item) {
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start = i; |
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} |
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} else if (input[i] == '\n') { |
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input[i] = 0;
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break;
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} |
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i++; |
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} |
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if (stop) {
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/* Found stop, means we have a start as well */
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strncpy(output, &input[start], stop - start); |
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return 1; |
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} else if (start) { |
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/* Have a start, no stop. We're returning the last item of the string */
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strcpy(output, &input[start]); |
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return 1; |
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} |
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return 0; |
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} |
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int main(int argc, char **argv) |
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{
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char command[50]; |
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char output[255]; |
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char label[25][100]; |
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char value[25][25]; |
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unsigned char attribute = 0; |
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FILE *f; |
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unsigned int i; |
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/* Prepare and execute command */
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snprintf(command, sizeof(command),
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"smartctl -A -d ata /dev/%s -n standby",
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&basename(argv[0])[6]); |
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if ((f = popen(command, "r")) == 0) { |
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return fail("cannot initiate command execution"); |
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} |
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/* Process command output */
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while (fgets(output, sizeof(output), f) != NULL) { |
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printf("#%s", output);
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/* Filter out attribute lines; look for lines starting with an attribute ID */
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if ((output[0] >= '0' && output[0] <= '9') || |
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(output[0] == ' ' |
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&& (output[1] >= '0' && output[1] <= '9')) |
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|| (output[0] == ' ' && output[1] == ' ' |
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&& (output[2] >= '0' && output[2] <= '9'))) { |
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/* Now, print the 2nd column (attribute name) and the 10th (raw value) */
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getitem(output, 1, label[attribute]);
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getitem(output, 9, value[attribute]);
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attribute++; |
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if (attribute == 25) { |
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break;
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} |
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} |
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} |
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/* Close command (this is where we get the exit code! */
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{
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int status = pclose(f); /* using an explicit temp var, to be compatible with macos & openbsd */ |
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i = WEXITSTATUS(status); |
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} |
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if (i == 1 || /* smartctl command did not parse */ |
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/*i == 2 || *//* smartctl device open failed */ |
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i == 127) { /* command not found */ |
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return fail("command execution failed"); |
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} |
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/* Setup for caching */
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snprintf(command, sizeof(command), "/mnt/ram/smart_%s", |
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&basename(argv[0])[6]); |
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if (attribute == 0) { |
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printf("#Cached attributes\n");
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/* No output from command, try to fetch attribute-list from disk with NaN values */
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if ((f = fopen(command, "r")) == 0) { |
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return
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fail |
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("command did not return data, no cached attribute-list");
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return 0; |
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} |
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} |
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if (argc > 1) { |
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if (strcmp(argv[1], "config") == 0) { |
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printf |
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("graph_title S.M.A.R.T values for drive %s\n"
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"graph_args --base 1000 --lower-limit 0\n"
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"graph_vlabel Attribute S.M.A.R.T value\n"
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"graph_category disk\n",
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&basename(argv[0])[6]); |
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if (attribute == 0) { |
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while (fgets(output, sizeof(output), f) != |
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NULL) {
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for (i = 0; i < strlen(output); |
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i++) {
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if (output[i] == '\n') { |
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output[i] = '\0';
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break;
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} |
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} |
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printf("%s.label %s\n", output,
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output); |
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} |
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fclose(f); |
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} else {
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f = fopen(command, "w");
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do {
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attribute--; |
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printf("%s.label %s\n",
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label[attribute], |
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label[attribute]); |
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if (f) {
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fprintf(f, "%s\n",
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label[attribute]); |
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} |
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} while (attribute);
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if (f) {
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fclose(f); |
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} |
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} |
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printf("standby.label standby\n");
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return 0; |
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} |
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} |
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/* Asking for a fetch */
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if (attribute == 0) { |
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/* No data, use cached info */
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while (fgets(output, sizeof(output), f) != NULL) { |
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for (i = 0; i < strlen(output); i++) { |
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if (output[i] == '\n') { |
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output[i] = '\0';
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break;
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} |
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} |
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printf("%s.value U\n", output);
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} |
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printf("standby.value 1\n");
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fclose(f); |
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} else {
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do {
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attribute--; |
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printf("%s.value %s\n", label[attribute],
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value[attribute]); |
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} while (attribute);
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printf("standby.value 0\n");
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} |
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return 0; |
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} |