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Avoid modification in place of the readdir()-> d_name field

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Andrea Mazzoleni 2026-05-18 00:18:30 +02:00
parent 6fe5353533
commit 3d2c5464c3
1 changed files with 9 additions and 5 deletions
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14
cmdline/unix.c
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@ -2588,6 +2588,7 @@ int ambient_temperature(void)
continue;
while ((hwmon_entry = readdir(hwmon_dir)) != NULL) {
char hwmon_name[PATH_MAX];
char value[128];
char name[128];
char label[128];
@ -2598,7 +2599,10 @@ int ambient_temperature(void)
if (strncmp(hwmon_entry->d_name, "temp", 4) != 0)
continue;
dash = strrchr(hwmon_entry->d_name, '_');
/* make a copy to allow modifications in place */
pathcpy(hwmon_name, sizeof(hwmon_name), hwmon_entry->d_name);
dash = strrchr(hwmon_name, '_');
if (dash == 0)
continue;
@ -2606,7 +2610,7 @@ int ambient_temperature(void)
continue;
/* read the temperature */
pathprint(path, sizeof(path), "/sys/class/hwmon/%s/%s", entry->d_name, hwmon_entry->d_name);
pathprint(path, sizeof(path), "/sys/class/hwmon/%s/%s", entry->d_name, hwmon_name);
if (sysattr(path, value, sizeof(value)) != 0)
continue;
@ -2626,13 +2630,13 @@ int ambient_temperature(void)
}
/* read the corresponding label file */
pathprint(path, sizeof(path), "/sys/class/hwmon/%s/%s_label", entry->d_name, hwmon_entry->d_name);
pathprint(path, sizeof(path), "/sys/class/hwmon/%s/%s_label", entry->d_name, hwmon_name);
if (sysattr(path, label, sizeof(label)) != 0) {
/* fallback to using the temp* name (e.g., temp1, temp2) */
pathcpy(label, sizeof(label), hwmon_entry->d_name);
pathcpy(label, sizeof(label), hwmon_name);
}
log_tag("thermal:ambient:device:%s:%s:%s:%s:%ld\n", entry->d_name, name, hwmon_entry->d_name, label, temp);
log_tag("thermal:ambient:device:%s:%s:%s:%s:%ld\n", entry->d_name, name, hwmon_name, label, temp);
/* check if temperature is in reasonable range */
if (temp < 15 || temp > 40)