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Bound Elbert local MAC address read #270

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Bound Elbert local MAC address read #270

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12 changes: 7 additions & 5 deletions meta-facebook/meta-elbert/recipes-utils/wedge-eeprom/files/utils/elbert_weutil.c
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Original file line number Diff line number Diff line change
Expand Up @@ -24,15 +24,17 @@
#include <string.h>
#define BMC_MGMT_MACADDR "/sys/class/net/eth0/address"

void read_local_mac(char *buffer)
void read_local_mac(char *buffer, size_t buffer_len)
{
if (!buffer)
if (!buffer || buffer_len == 0)
return;
FILE *fp;
sprintf(buffer, "NA");
snprintf(buffer, buffer_len, "NA");
fp = fopen(BMC_MGMT_MACADDR, "r");
if (fp){
fscanf(fp, "%s", buffer);
if (fscanf(fp, "%19s", buffer) != 1) {
snprintf(buffer, buffer_len, "NA");
}
fclose(fp);
}
return;
Expand Down Expand Up @@ -64,7 +66,7 @@ int main(int argc, const char *argv[])
return -1;
}

read_local_mac(local_mac);
read_local_mac(local_mac, sizeof(local_mac));
elbert_parse_mac(parsed_mac,local_mac,0);

printf("Wedge EEPROM %s:\n", fn ? fn : "");
Expand Down