Minecon724/measurer
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fix

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Minecon724 2024-07-15 12:03:20 +02:00
parent fb5b1690e6
commit f436eb959f
Signed by: Minecon724
GPG key ID: 3CCC4D267742C8E8
2 changed files with 8 additions and 7 deletions
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5
README.md
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@ -7,9 +7,10 @@ a lightweight script that logs the most important stuff about the raspberry pi
CPU temperature is read from `/sys/class/thermal/thermal_zone0/temp` but that should work on every Linux computer \ CPU temperature is read from `/sys/class/thermal/thermal_zone0/temp` but that should work on every Linux computer \
Ambient temperature is read from `/sys/bus/w1/devices` so you must have 1wire enabled, if you don't have that set `SENSOR` to `0` Ambient temperature is read from `/sys/bus/w1/devices` so you must have 1wire enabled, if you don't have that set `SENSOR` to `0`
# compilation # compilation and usage
`make` or `gcc main.c -o measurer` \ `make` or `gcc main.c -o measurer` \
Should throw no warnings Should throw no warnings \
`./measurer <output>`
# why # why
like heavy ahh like databases grafana etc go away you're a performance monitor why'd you reduce performance like heavy ahh like databases grafana etc go away you're a performance monitor why'd you reduce performance

10
main.c
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@ -7,7 +7,7 @@
#include <errno.h> #include <errno.h>
#include <time.h> #include <time.h>
#define SENSOR 1 #define SENSOR 0
int read_temperature(char *filename) { int read_temperature(char *filename) {
FILE *fp; FILE *fp;
@ -70,7 +70,7 @@ int read_w1_temperature(char *w1_id) {
} }
int main(int argc, char *argv[]) { int main(int argc, char *argv[]) {
if (argc == 0) { if (argc < 2) {
printf("Filename required\n"); printf("Filename required\n");
return 1; return 1;
} }
@ -105,14 +105,14 @@ int main(int argc, char *argv[]) {
FILE *fp; FILE *fp;
fp = fopen(argv[0], "a"); fp = fopen(argv[1], "a");
if (fp == NULL) { if (fp == NULL) {
printf("Error opening output file"); perror("Error opening output file");
return 1; return 1;
} }
if (fprintf(fp, line) != 0) { if (fprintf(fp, line) < 0) {
perror("Error writing to output file"); perror("Error writing to output file");
fclose(fp); fclose(fp);
return 1; return 1;