We have some C code in our IRISSeismic package that has starting generating
truncation warnings with GCC 12.
This is the original code and warning:
char seqnum[7];
snprintf (seqnum, 7, "%06d", msr->sequence_number);
warning: ' %06d' directive output may be truncated writing between 6 and 11
bytes into a region of size 7 [-Wformat-truncation=]
This was our attempted fix and new warning:
char seqnum[11];
snprintf (seqnum, sizeof(seqnum), "%06d", msr->sequence_number);
warning: ' snprintf' output may be truncated before the last format character
[-Wformat-truncation=]
I don't have much experience with C and I'm not sure why the attempted fix
didn't work. Does anyone have advice on what else I can try to fix this?
Thanks,
Gillian Sharer
IRIS DMC
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